Toshiba Tohsiba Electromagnetic Flowmeter Converter L5232 Users Manual

2014-12-13

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6F8A0917

NOTES

Before using the equipment, please read this manual carefully and understand the

contents, and then use the equipment correctly.

• NEVER attempt to operate the equipment in any ways that are not described in this

instruction manual.

• After reading this manual, store it with care in a place where it can be referred to

whenever needed.

• Please be sure that this manual is delivered to the personnel who will use this

product.

Electromagnetic Flowmeter Converter

LF232 Type

INSTRUCTION MANUAL

6F8A0917

NOTICE

Thank you very much for your purchase of our LF232 Type Electromagnetic Flowmeter

Converter.

This instruction manual describes about the precautions required when using the LF232

converter, installation, configuration and maintenance. It is intended for the personnel in

charge of the installation, operation and maintenance.

To use this product properly and safely, read this manual carefully before using this product.

After reading this manual, store it in a place where it can be referred to

whenever needed.

Toshiba LF232 electromagnetic flowmeter converters can be used in combination with

various types of electromagnetic flowmeter detectors.

For the notes on usage, piping, installation, configuration and maintenance of the combined

detector, check the model number of the combined detector and read the instruction manual of

the relevant detector.

About Safety Precautions

Read the Safety Precautions described at the front carefully and understand the contents

before using this product.

The “Safely symbols” used in the “Safety Precautions” are shown in a location such as in the

margin to the left of the corresponding commentary in the main text.

This product does not conform to standards for overseas specific areas such as CE mark used

in the EU market. Be careful that this product cannot be shipped to such areas where those

standards are required.

NOTES

1. The reproduction of the contents of this Manual in any form, whether wholly or in part,

is not permitted without explicit prior consent and approval.

2. The information contained in this Manual is subject to change or review without prior

notice.

3. Be sure to follow all safety, operating and handling precautions described in this

Manual and the regulations in force in the country in which this product is to be used.

nd Edition August, 2008

First Edition June, 2008

6F8A0917

SAFETY PRECAUTIONS

Safety signs and labels affixed to the product and/or described in this manual give important

information for using the product safely. They help prevent damage to property and obviate hazards

for persons using the product.

Make yourself familiar with signal words and symbols used for safety signs and labels. Then read the

safety precautions that follow to prevent an accident involving personal injury, death or damage to

property.

Explanation of signal words

The signal word or words are used to designate a degree or level of hazard seriousness.

The signal words used for the product described in this manual are WARNING and CAUTION.

Indicates a potentially hazardous situation which, if not avoided, could

result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, may

result in minor to moderate injuries or in property damage.

Notes:

1 “Serious injury” refers to an injury such as loss of sight, physical damage, burns (high

temperature or low temperature) electric shock, bone fracture and poisoning and the after

effect of the injury remains or the injury requires hospitalization or long periods of outpatient

treatment.

2 “Minor to moderate injuries” refers to burns, electric shocks, and so on, that do not require

the injured person to be hospitalized or go to a hospital for a long period of time for medical

treatment. “Property damage” includes all kinds of damage to property, equipment or

materials.

Safety symbols

The following symbols are used in safety signs and labels affixed to a product and/or in the manual for

giving safety instructions.

Indicates an action that is prohibited. Simply DON’T do this action.

The prohibited action is indicated by a picture or text inside or next to the circle

Indicates an action that is mandatory. DO this action.

The mandatory action is indicated by a picture or text inside or next to the circle.

Indicates a potential hazard. The potentially hazardous situation is indicated by a

picture or text inside or next to the triangle.

Color explanation

Background color: Yellow and Red, Border: Black, Picture display: Black

Background color: Yellow, Border: Black, Picture display: Black

6F8A0917

SAFETY PRECAUTIONS (continued)

Safety Precautions for Installation and Wiring

Do not use the LF232 in an explosive

atmosphere.

Use an appropriate device to carry and install

the LF232.

DON’T

Using this product in an explosive

atmosphere can cause explosion.

If this product falls to the ground,

injury, or malfunction of or damage

to the product, can be caused.

Install a switch and fuse to isolate the LF232

from mains power.

Do not modify or disassemble the LF232

unnecessarily.

Power supply from mains power can

cause electric shock or circuit

break-down.

DON’T

Modifying or disassembling this

product can cause electric shock,

malfunction of or damage to this

product.

Turn off mains power before conducting wiring

work.

Ground the LF232 independently from power

equipment. Type D (100 ohm or less ground

resistance)

Wiring while power is applied can

cause electric shock.

Operating this product without

grounding can cause electric shock or

malfunction.

Turn off mains power before working on pipes. Use crimped terminal lugs for the terminal board

and GND terminal.

Working on pipes while power is

applied can cause electric shock.

Loose connections can cause electric

shock, fire from excessive current or

system malfunction.

Do not conduct wiring work with bare hands. Do not work on piping and wiring with wet

hands.

DON’T

Remaining electric charge even if

power is turned off can still cause

electric shock.

DON’T

Wet hands may result in electric

shock.

The label shown left is placed near the terminal board for power supply on the

converter.

Be alert to electric shock.

6F8A0917

SAFETY PRECAUTIONS (continued)

Safety Precautions for Maintenance and Inspection

Do not touch the LF232 main body when high

temperature fluid is being measured.

Do not conduct wiring work when power is

applied.

DON’T

The fluid raises the main body

temperature and can cause burns

when touched.

DON’T

Wiring while power is applied can

cause electric shock.

Do not conduct wiring work with wet hands.

DON’T

Wet hands may result in electric

shock.

The label shown left is placed near

the terminal board for power input.

(A black border and symbol on

yellow triangle)

Be alert to electric shock.

Do not use a fuse other than the one specified.

DON’T

Using a fuse other than the one

specified can cause system failure,

damage or malfunction.

Use a rated fuse as follows:

Fuse rating:

• 1A/250V for 100 to 240Vac or 110Vdc

• 2A/250V for 24 Vdc or large meter size spec.

100Vac or partially filled pipes spec. 100Vac

Dimensions: Diameter 5.2 mm × 20 mm

Melting time characteristic: Normal blow

Usage limitation

(1) This product is not manufactured for applying to a system requiring safety directly involved human

life as follows. Please contact your nearest Toshiba reprehensive if there is a possibility of using

this product for such use.

− Main control systems of nuclear power plants, safety protection systems in nuclear facilities or

other important systems requiring safety

− Medical control systems relating to life support

(2) This product is not approved for explosion-proof applications. Please do not use this product in an

explosive atmosphere (explosion protection area).

Warranty and Limitation of Liability

Toshiba does not accept liability for any damage or loss, material or personal, caused as a direct or

indirect result of the operation of this product in connection with, or due to, the occurrence of any

event of force majeure (including fire or earthquake) or the misuse of this product, whether intentional

or accidental.

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Handling Precautions

To obtain the optimum performance from the LF232 converter for years of continuous operation,

observe the following precautions.

(1) Do not store or install the flowmeter in:

• Places where there is direct sunlight. If this is unavoidable, use an appropriate sunshade. If

the control keys (infrared switches) are exposed to direct sunlight, they may not function

correctly.

• Places where there is snow and ice

Infrared switches may not function correctly.

• Places where excessive vibration or mechanical shock occurs.

• Places where high temperature or high humidity conditions obtain.

• Places where corrosive atmospheres exit.

• Places that can be submerged under water.

• Place where there is slop floor. To put the flowmeter temporarily on the floor, place it carefully

with something, such as stopper, to support it so that the flowmeter will not topple over.

• Places where there is following factors.

◆Factors to impede infrared switch to operate properly

・Intense light such as direct sunlight and reflected sunlight by window glass or metal plate

・Place where brightness changes suddenly such as ON/OFF of lighting

・Dense smoke or steam near the control panel

・Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and haze

due to their attachment

・Light reflecting object near the control panel, or reflecting object such as metal plate placed

opposing to the control panel

When any of above factors is considered, take a measure for the proper operation of infrared

switch such as to place a cover or to secure a space for at least a person to stand in front of the

control panel.

When unable to avoid above factors, operate the EMF converter removing the factor by

covering the control panel by hand so that light does not shine on it, by cleaning those attached

on the control panel, or by standing in-between the reflecting object and the control panel to

block the light.

(2) Wire cables correctly and securely.

Be sure to ground at the combined converter side (class D grounding (grounding resistance

100Ω or less)). Avoid a common ground used with other equipment where earth current may

flow. An independent ground is preferable.

(3) The cable lead-in section must be tightened securely to keep air tightness.

(4) Keep the fluid to be measured from freezing.(This may damage the detector tube.)

(5) To prevent liquid leaks caused by corrosion, select materials appropriate for applicable fluids.

6F8A0917

Handling Precautions (continued)

(6) The converter housing covers and the cable connections are tightened securely at the time of

shipment. Do not remove these covers or connections unless it is necessary to wire new cables

or replace old ones. Otherwise, gradual deterioration of circuit isolation or damage to this

product can be caused.

(7) Observe the following precautions when you open the converter housing cover:

• Do not open the cover in the open air unprotected against rain or wind. This can cause electric

shock or cause damage to the flowmeter electronics.

• Do not open the cover under high ambient temperature or high humidity conditions or in

corrosive atmospheres. This can cause deterioration of system accuracy or cause damage to

the flowmeter electronics.

(8) This product may cause interference to radio and television sets if they are used near the

installation site. Use metal conduits etc. for cables to prevent this interference.

(9) Radio transmitters such as transceivers or cellular phones may cause interference to the

flowmeter if they are used near the installation site. Observe the following precautions when

using them:

• Close a transmitter cover before using a transceiver.

• Do not use a transceiver whose output power is more than 5 W.

• Move the antenna of a transceiver or a cellular phone at least 50 cm away from the flowmeter

and signal cables when using it.

• Do not use a radio transmitter or a cellular phone near the flowmeter while it is operating

online. The transmitter or cellular phone’s output impulse noise may interfere with the

flowmeter.

• Do not install a radio transmitter antenna near the flowmeter and signal cables.

(10) For reasons of flowmeter failure, inappropriate parameters, unsuitable cable connections or

poor installation conditions, the flowmeter may not operate properly. To prevent any of these

problems causing a system failure, it is recommended that you have preventive measures

designed and installed on the flowmeter signal receiving side.

(11) For piping and installation of the combined detector, check the model number of detector and

read the instruction manual of the relevant detector.

* We assume no responsibility for nonconformity caused by violation of precautions described

in this manual or used in violation of the installation method and the operation method

stipulated in a relevant ordinance or other regulations.

6F8A0917

Table of Contents

1. Product Inspection and Storage···················································································10

1.1 Product Inspection······································································································10

1.2 Storage ·······················································································································10

2. Overview ····························································································································11

3. Names of Parts ·················································································································12

4. Installation ·························································································································15

4.1 Cautionary Notes on Selecting the Installation Location ············································16

4.2 How to Install the Converter ·······················································································17

5. Wiring··································································································································19

5.1 Installation Cables ······································································································20

5.2 External Connections ·································································································21

5.3 Cautionary Notes on Wiring························································································22

5.3.1 Cautionary Notes on Wiring between Detector and Converter······················22

5.3.2 Cautionary Notes on Wiring between Instruments and Converter·················22

5.4 Wiring Method ············································································································23

5.4.1 Terminal Treatment of Cable ·········································································23

5.4.2 Cable Connection··························································································25

5.4.3 Grounding······································································································27

5.5 Digital I/O Connections·······························································································29

5.6 Cautionary Notes on Replacing Converter·································································30

5.6.1 Replacing the LF230 Converter·····································································30

5.6.2 Combination with an Existing Detector (for Large Meter Size)······················31

5.6.3 Replacement of partially filled pipes type ····················································32

6. Operation ···························································································································34

7. Display and Controls ······································································································36

7.1 Names and Functions of Display and Controls ··························································37

7.2 Display Format ···········································································································40

7.3 Basic Operations

(Mode Switching, Setting Mode Operation, Total Counter Operation)························43

7.3.1 Mode Switching ·····························································································43

7.3.2 Setting Mode Operation·················································································46

7.3.3 Password Input······························································································49

7.3.4 Totalizer Operation ························································································51

7.3.5 Maintenance Menu························································································53

7.4 Setting Menu List········································································································54

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8. Parameter Settings / Adjustment ·················································································55

8.1 Parameter Setting Items·····························································································55

8.2 Parameters Check / Change ······················································································56

8.2.1 Exciting Current Value···················································································56

8.2.2 Meter Size ·····································································································58

8.2.3 Exciting Frequency························································································60

8.2.4 Flow Direction································································································62

8.2.5 Password Setting···························································································64

8.2.6 Normal Indicating Unit ···················································································66

8.2.7 Custom Unit···································································································69

8.2.8 Span Value (Range) ·····················································································72

8.2.9 Damping Constant·························································································79

8.2.10 Low Cutoff value····························································································81

8.2.11 Current Output Setting Used When an Alarm Occurs ···································83

8.2.12 Display low cut On/Off···················································································85

8.2.13 Output Low Limit Setting ···············································································87

8.2.14 Digital I/O Function························································································89

8.2.15 Count Rate (Pulse Rate) and Pulse Width ····················································93

8.2.16 Preset Counter ······························································································98

8.2.17 Flow Rate High/Low limit Alarm···································································101

8.2.18 Fluid Empty Alarm ·······················································································105

8.2.19 Self-Diagnosis Function···············································································107

8.2.20 Rate-of-Change Limit Value and Control Time ············································110

8.3 Initial Settings When Shipped from the Factory ·······················································112

8.4 Fixed Value Output (Loop Check) ············································································114

8.5 Zero Adjustment ·······································································································118

8.5.1 Still Water Zero Adjustment ·········································································118

8.5.2 Zero Offset Adjustment················································································120

9. Mag-Prover Calibration·································································································122

9.1 Calibration Items·······································································································122

9.2 Converter Check / Calibration ··················································································123

9.2.1 0% Flow Rate Calibration (Zero Calibration)···············································123

9.2.2 50% Flow Rate Calibration··········································································124

9.2.3 100% Flow Rate Calibration (Span Calibration) ··········································125

9.2.4 Checking the Exciting Current Value···························································126

10. Function Description ····································································································127

10.1 Digital I/O Specifications···························································································128

10.2 Totalizer and Pulse Output ·······················································································129

10.3 Multi-Range Functions······························································································132

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10.4 Flow Rate High/Low Limit Alarm Output···································································138

10.5 Fluid Empty Alarm Output·························································································141

10.6 Preset Counter Output Function···············································································142

10.7 Remote Still Water Zero Adjustment·········································································146

10.8 Remote Selection of Fixed Value Output··································································147

10.9 Converter Error Alarm Output···················································································148

11. Communications Function ··························································································149

11.1 Connection with the HHT terminal············································································149

11.2 Procedure for Communication with HHT··································································151

11.3 Cautionary Notes on Communications·····································································152

12. Diagnosis and Alarms···································································································153

12.1 Diagnostic messages ·······························································································153

12.2 Output When an Error or Alarm Occurs····································································156

13. Maintenance and Inspection ·······················································································157

13.1 Maintenance·············································································································157

13.2 Troubleshooting········································································································159

13.2.1 Flow rate is not indicated·············································································159

13.2.2 Flow rate indication is not correct································································160

13.2.3 Flow rate indication is not stable ·································································161

14. Principle of Operation···································································································163

15. Specifications·················································································································164

15.1 Specifications ···········································································································164

15.2 Model Number Table ································································································169

16. Outline Drawing··············································································································171

6F8A0917

1. Product Inspection and Storage

1.1 Product Inspection

The LF232 electromagnetic flowmeter is shipped in a cardboard box filled with cushioning materials.

Open the package and check the following items:

Are the following items included?

Electromagnetic flowmeter main unit·························································1 unit

Instruction manual···············································································1 copy

Adjusting capacitor·························1 piece (only for large meter size specification)

Isn’t there any damage to the main unit?

Is the specification the same as when you placed an order?

If you find anything defective and unclear, contact the sales office from which you purchased the

product or your nearest Toshiba representative.

The capacitor attached for large meter size specification can be used to improve the performance when

combining the converter with an old type detector. This capacitor is usually not used. For details, see

5.3.1 “Cautionary Notes on Wiring between Detector and Converter”

1.2 Storage

Regarding the storage after the flowmeter is delivered and before starting installation work, be careful

about the following items:

Do not leave the flowmeter in a place such as outdoors where direct sunlight hits or a place exposed

to rain and wind.

Avoid places where humidity is extremely high or the temperature is extremely high or low and

store the flowmeter in a well ventilated place.

• Humidity range: 10 to 90% RH (no condensation)

• Storage temperature range: -13 to 149 °F (-25 to 65 °C)

Store the flowmeter in a place where vibration and shock does not occur.

If the cover of the converter is left open while being stored, insulation may be deteriorated. Do no

open the cover until the time of wiring for the converter.

To place the flowmeter temporarily on the floor, use a stopper, etc. when needed to prevent it from

rolling over.

6F8A0917

2. Overview

The electromagnetic flowmeter is an instrument to measure the volumetric flow rate of conductive

fluids using Faraday's law of electromagnetic induction.

The flowmeter consists of a detector which generates a signal of electromotive force proportional to

the flow rate of the fluid and detects this signal, and a converter which converts the signal detected by

the detector to a unified signal output.

Features

The electromagnetic flowmeter has features such as:

• No pressure loss by piping

• Flow measurement can be made not affected by conditions such as fluid temperature, pressure,

density and flow condition.

• It is easy to read the flow indication because a liner relation exists between the flow rate and

output signal.

The LF232 converter has additional features described below:

(1) High accuracy measurement of ±0.5% of rate can be obtained in the velocity range of 1.0ft/s to

32.8ft/s (0.3m/s to 10m/s). (Measurement range and accuracy are different by detector.)

(2) Stable measurement can be made even with fluids containing solids (sludge and slurry).

•The unique Noise-Sentry filter circuit and arithmetic logic unit (ALU) enables you to obtain a

stable output.

(3) The converter is equipped with various display and output functions.

• Various display and output functions can be easily set by switch operation.

• The converter is equipped with worldwide standard HART* protocol communication.

(4) Use of infrared switches

• Use of infrared switches allows you to perform various operations without opening the converter

housing cover.

(5) Easy-to-read liquid crystal display (16 characters × 2 lines)

• It is easy to read the indication even in a dark place by means of backlight.

* HART protocol··········“HART” stands for Highway Addressable Remote Transducer and is a

communication protocol recommended by HCF (HART communication

Foundation) for industrial sensors.

6F8A0917

3. Names of Parts

Appearance

Mounting plate

Display section

Operation switch

(Infrared switch)

Converter cover

mounting screw

Mounting plate

Cable connection for signal cable

Cable connection for power cable

Ground terminal

Cable connection for excitation cable

Cable connection for output cable

Cable connection for digital I/O cable

Appropriate cable outer diameter: 11 to 13mm

Material: Nylon resin

Housing side connection: G(PF) 1/2 thread

Cable connection (Cap nuts) 5 pieces

Material: Nylon resin

Cable connection

for out

ut cable

Converter cover

mounting screw

6F8A0917

Internal structure (with converter cover opened)

Display section (LCD)

Operation switch

(Infrared switch)

Fuse holder

Power switch

Terminal block

Protection cover

6F8A0917

Terminal block construction

Detector connection terminals

Digital I/O terminals

Power supply

terminals

Power switch

Protection cover

Internal ground

terminal

Fuse holders

The label shown left is placed near the

terminal board for power supply on the

converter.

Be alert to electric shock.

4 20mADC current

output terminals

6F8A0917

4. Installation

Cautionary notes on installation

Do not use the LF232 in an explosive

atmosphere.

Use an appropriate device to carry and install

the LF232.

DON’T

Using this product in an explosive

atmosphere can cause explosion.

If this product falls to the ground,

injury, or malfunction of or damage

to the product, can be caused.

Do not modify or disassemble the LF232

unnecessarily.

Ground the LF232 independently from power

equipment. Type D (100 ohm or less ground

resistance)

DON’T

Modifying or disassembling this

product can cause electric shock,

malfunction of or damage to this

product.

Operating this product without

grounding can cause electric shock or

malfunction.

Do not work on piping and wiring with wet

hands.

DON’T

Wet hands may result in electric

shock.

The label shown left is placed near

the terminal board for power input.

(A black border and symbol on

yellow triangle)

Be alert to electric shock.

6F8A0917

4.1 Cautionary Notes on Selecting the Installation

Location

(1) Avoid places within the immediate proximity of the equipment producing interference to

measurement (such as motors, transformers, radio transmitters, electrolytic cells, or other

equipment causing electromagnetic or electrostatic interference).

(2) Avoid places where excessive vibration occurs.

(3) Avoid places where there is direct sunlight as mush as possible. If this is unavoidable, provide a

sunshade, etc.

(4) Avoid places where high corrosive atmosphere or high humidity condition exists.

(5) Avoid places of too great an elevation or constricted areas and install the flowmeter in a place

easy for necessary work.

(6) The standard length of the cable that connects the detector and the converter is 30m. Select a

converter installation location so that the distance of the detector and the converter will not exceed

30m.

(7) If direct sunlight hits the display and the operation section or if there is something nearby that

easily reflects light, this kind of light becomes disturbance light and the switch operation may not

work correctly. Be careful about the installation location and angle, or take measures such as

providing a sunshade or shield plate so that disturbance light does not hit the operation section

directly.

(8) Places where there is following factors.

◆Factors to impede infrared switch to operate properly

・Intense light such as direct sunlight and reflected sunlight by window glass or metal plate

・Place where brightness changes always such as ON/OFF of lighting

・Dense smoke or steam near the control panel

・Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and haze due

to their attachment

・Light reflecting object near the control panel, or reflecting object such as metal plate placed

opposing to the control panel

When any of above factors is considered, take a measure for the proper operation of infrared switch

such as to place a cover or to secure a space for at least a person to stand in front of the control panel.

When unable to avoid above factors, operate the EMF converter removing the factor by covering the

control panel by hand so that light does not shine on it, by cleaning those attached on the control panel,

or by standing in-between the reflecting object and the control panel to block the light.

6F8A0917

4.2 How to Install the Converter

The converter can be mounted on a panel, wall or on a pipe stand. Install the converter so that the front

of the converter cover stays vertically straight and the cable ports of the converter stay at the bottom.

Figure 4.1 shows an example of panel and wall mounting installation and Figure 4.2 shows an

example of pipe stand installation.

Figure 4.1 Example of Panel and Wall Mounting

2.91(74)

14.57 (370)

14.57(370)

2.91(74)

M10 bolt, etc.

Wall surface, etc.

Mounting Hole Dimensions

φ0.43 (φ12) hole

φ0.43 (φ12)

(M10 mounting holes)

Unit: inch (mm)

6F8A0917

Figure 4.2 Example of Pipe Mounting

14.57 (370)

M10 U bolt, etc

2” (50A) PIPE

Unit: inch (mm)

2.91 (74)

6F8A0917

5. Wiring

Cautionary notes on wiring

urn off mains power before working on pipes. Install a switch and fuse to isolate the LF232

from mains power.

Working on pipes while power is

applied can cause electric shock.

Power supply from mains power can

cause electric shock or circuit

break-down.

Do not work on piping and wiring with wet

hands.

Ground the LF232 independently from power

equipment. Type D (100 ohm or less ground

resistance)

DON’T

Wet hands may result in electric

shock.

Operating this product without

grounding can cause electric shock or

malfunction.

Do not conduct wiring work with bare hands. Use crimped terminal lugs for the terminal board

and GND terminal.

DON’T

Remaining electric charge even if

power is turned off can still cause

electric shock.

Loose connections can cause electric

shock, fire from excessive current or

system malfunction.

Do not modify or disassemble the LF232

unnecessarily.

DON’T

Modifying or disassembling this

product can cause electric shock,

malfunction of or damage to this

product.

The label shown left is placed near

the terminal board for power input.

(A black border and symbol on

yellow triangle)

Be alert to electric shock.

Flowmeter performance may be affected by the way wiring is carried out. Proceed with correct wiring

by observing the following items.

(1) For cable route, avoid places near electrical equipment (such as motors, transformers or radio

transmitters) which cause electromagnetic or electrostatic interference.

(2) If the converter interior or cable ends get wet or humidified, deterioration of insulation occurs and

this may cause malfunction or noise problems. Avoid a rainy day if wiring is carried out outdoors.

Even indoors, make arrangements to prevent water from splashing over the converter and try to

finish the wiring as quickly as possible

(3) Since the excitation cable and the flow rate signal cable carry very small signals, pass each of the

cables separately through a thick steel conduit and keep them away from large current wiring as

much as possible, and do not install them in parallel.

6F8A0917

(4) If the converter needs to be installed in a location where watertight installation is required, make

unused cable ports watertight. (Be careful that the attached blind plate is used for dustproof

purpose and it is not effective for watertight installation.)

(5) The converter has a surge arrestor/protector installed inside. Therefore, do not conduct a withstand

voltage test for the converter. In addition, to check the insulation of the converter, use a voltage of

250VDC or less.

(6) When wiring is completed, be sure to install the protection cover of the terminal block.

5.1 Installation Cables

Use the kind of cables shown in Table 5.1 to connect to the converter.

Table 5.1 Installation Cables

Name Cable name

Nominal

cross-sectional area Overall diameter Description

Flow rate signal

cable

2-core shielded

chloroprene cabtyre

cable

( Rubber covered cable )

0.75mm2 0.433−0.512 inch

(11−13mm)

JIS C 3327 or

equivalent

Excitation cable 3-core chloroprene

cabtyre cable

( Rubber covered cable )

2mm2

1.25mm2

0.433−0.512 inch

(11−13mm)

JIS C 3327 or

equivalent

Power cable 3-core vinyl sheathed

cable or 2-core vinyl

sheathed cable

2mm2 0.433−0.512 inch

(11−13mm)

CVV JIS C 3401 or

equivalent

Output signal

cable

The number of insulated conductors the cable contains differs

depending on the specification of the output signal cable.

Use a shielded cable of overall diameter 0.433 to 0.512 inch

(11 to 13mm) with nominal cross-sectional area of 1.25mm2.

CVV-S

JCS-258-C or

equivalent

6F8A0917

5.2 External Connections

The external connections of the converter are shown in Figure 5.1. See 5.4 “Wiring Method” to

connect the cables correctly

Terminal block

IV wire 5.5mm2or more

Class D grounding

(Ground resistance

100 or less)

Thick steel conduit

Flow rate signal cable

(2-core shielded cabtyre cable)

Connected detector

Excitation cable

(3-core cabtyre cable)

Output cable (CVV-S)

Power cable (CVV)

Power supply

Current output

(4 20mADC)

Digital input 2 (option)

Digital input 1 (option)

(20 30VDC)

Digital output 4 (option)

Digital output 3 (option)

Digital output 2 (option)

Digital output 1

Input/Output cable (CVV-S)

5.1 External Wiring Connection Diagram

6F8A0917

5.3 Cautionary Notes on Wiring

5.3.1 Cautionary Notes on Wiring between Detector and Converter

• Flow rate signal cable and excitation cable are attached to the detector.

Be sure to use the attached cables.

Note: If the length of the cables exceeds 30m, the cables may not be attached. Check whether

the cables are attached or not referring to the specification.

• The allowable cable length between the detector and the converter differs depending on the

conductivity of the fluid to be measured. Refer to the Instruction Manual of the detector combined.

• The end of the attached cable to connect to the converter is covered with cap to prevent entry of

humidity. Do not remove this cap from the cable until the cable is ready to be connected to the

converter.

• When you connect cables between the detector and the converter, connect the excitation cable first

and then the flow rate signal cable.

• Since the input signal cable carries very small signals, be sure to install the excitation cable and the

input signal cable in separate thick steel conduit (0.87 inch (22mm)) and separate them from other

large current wiring as much as possible and do not install them in parallel. The cable connection

port is G (PF) 1/2 female thread.

• The detector side of the attached cable is already connected when shipped from the factory. In

addition, since the terminal box of the detector has airtight structure, avoid removing the wired cable

from the detector.

• To replace the flow rate signal cable and excitation cable, refer also to the Instruction Manual of the

detector. Before you replace these cables, place an order for packing of the detector terminal box

cover as well as packing for the cable connection to Toshiba or Toshiba representative and make sure

to replace these packings when you replace the cables.

5.3.2 Cautionary Notes on Wiring between Instruments and Converter

• To avoid 2-point grounding, ground the shield of the output cable at the receiving instrument side as

a rule.

• Use a grounding wire of IV wire 5.5mm2 or more. The size of the screw for external grounding

terminal is M4. In addition, do not share the grounding wire with other equipment where grounding

current may flow. (An independent grounding is preferable.)

• Power cable

When a 3-core cable is used, ground the shield of the cable using the FG terminal.

When a 2-core cable is used, ground the shield of the cable using the external ground terminal and

make it as short as possible.

• When you replace the Toshiba LF230 flowmeter converter with this converter, be careful that the

cable connection is changed.

6F8A0917

5.4 Wiring Method

Do not conduct wiring work when power is

applied.

Do not work on piping and wiring with wet

hands.

DON’T

Wiring while power is applied can

cause electric shock.

DON’T

Wet hands may result in electric

shock.

5.4.1 Terminal Treatment of Cables

Proceed as follows to treat the terminals at the converter side of the flow rate signal and excitation

cable and to connect these cables to the terminal block. Use appropriate cables referring to 5.1

"Installation Cables." Attach and crimp a round type M4 insulated crimping terminal to the end of each

cable.

Excitation cable

Strip the sheath from the end of each wire as shown in Figure 5.2 and attach and crimp an M4

crimping terminal with insulated sleeve to the end of each wire and then connect the crimped

terminals to X and Y of the terminal block. Connect the terminal of red wire to E of the terminal

block.

X Black

E Red

Y White

M4 crimped terminal

25 to 45mm

Figure 5.2 Terminal Treatment of Excitation Cable

6F8A0917

Connecting the input signal cable

Strip the sheath from the end of each wire of a 2-core individually shielded cable as shown in

Figure 5.3 and attach and crimp an M4 crimping terminal with insulating sleeve to the end of each

wire. Connect the crimped terminals to the A and B terminals of the terminal block. Twist the

shields of the two wires and cover them with a thermal contraction tube or vinyl tube so that the

shields do not make contact with the case or the core wires. Then attach and crimp an M4 crimping

terminal with insulated sleeve to the end of the twisted shields. Connect the crimped terminal to the

G terminal of the detector and the converter.

A Black

G Sealed

B White

Thermal contraction tube or vinyl tube

25 to 45mm

M4 crimped terminal

Figure 5.3 Terminal Treatment of Flow Rate Signal Cable

Cautionary notes on terminal treatment for shields of the signal cable

• When stripping external sheath, intermediate and insulation sheath, be careful not to scratch or cut

the internal conductors and the shield mesh.

• Do not unravel the shield mesh and treat it as shown in Figure 5.4.

Figure 5.4 How to Treat the Shield Mesh of Signal Cable

6F8A0917

Power cable, current output cable and digital I/O cables

Necessary cables should be purchased and prepared by the agent in charge of installation.

Strip the sheath from the end of each wire and attach and crimp an M4 crimping terminal with

insulated sleeve to the end of each wire.

• Connect the power cable terminals to L1 and L2 of the terminal block.

• Connect the current output cable terminals to (+) and (−) of the terminal block.

• Connect the digital I/O cable terminals to the required terminals among the terminals of DI, DO1

− CO1, (CO2 to DO4) − CO2, (DI1, DI2) − CI.

M4 crimped terminal

25 to 45mm

Figure 5.5

Terminal Treatment of Power Cable, Current Output Cable and Digital I/O Cables

5.4.2 Cable Connection

Connect and install the terminal-treated cables to the terminal block in the procedure below.

* Connect the cables to the terminal block securely. A loose connection may cause incorrect

measurement. After connecting each cable, try to pull it to check whether it has been connected

securely.

Remove the cap nut for tightening the cable connection and attach the removed cap nut, seal ring and

packing onto the terminal-treated cable in this order and then lead the cable into the converter.

(The blind plate is used for dustproof protection during storage. Remove it when connecting a cable

because it is not needed.)

Figure 5.6 Cable Connection

6F8A0917

Referring to 5.2 "External Connections," connect each cable to the terminal block. Tighten the screws

of the terminal block tightly to make them securely connected. A loose connection may cause incorrect

measurement. After connecting each cable, try to pull it to check whether it has been connected

securely.

Phillips screwdriver

Terminal block

* The appropriate torque

for tightening the terminal

block screw is 1.2 N m

Figure 5.7 Connection to Terminal Block

After connecting the cables to the terminal block, take up the slack of the cables and tighten the cap

nut.

At this time, be careful that if the sheath-removed portion of the cable comes to the packing area, air

tightness may not be kept.

Cable connection

Cap nut for tightening

Cable

Packing

Correct

Because the contact

surface of the cable

and the packing is

small, air tightness

may not be kept.

Incorrect

Cable connection

Figure 5.8 Cable Tightening

6F8A0917

5.4.3 Grounding

The external ground terminal of the detector and the FG terminal of the converter (or external ground

terminal of the converter) must be grounded securely with Class D grounding (grounding resistance

100Ω or less). Use an IV wire 5.5mm2 or more for grounding wire.

In addition, do not share the grounding wire with other equipment where grounding current may flow.

(An independent grounding is preferable.)

If it is difficult to carry out grounding work at the detector side due to a pit installation or other reasons,

use a 3-core cable for the excitation cable and connect the E terminal of the detector to the E terminal

or other reasons as shown in Figure 5.9(b), of the converter. (The E terminal of the converter is

internally connected to the FG terminal and the converter housing.)

ABX

Converter

terminal block

External ground

terminal

Twisting shields

Input signal cable

Twisting shields Excitation cable

Detector terminal block

ABX

GEY FG

Ground terminal

Class D ground

(Ground resistance 100 or less)

Class D grounding

(Ground resistance 100 or less)

Figure 5.9(a) Wiring between Detector and Converter

6F8A0917

ABX

Converter

terminal block

External ground

terminal

Twisting shields

Input signal cable

Twisting shields Excitation cable

Detector terminal block

ABX

GEY FG

Ground terminal

Class D grounding

(Ground resistance 100 or less)

Figure 5.9 (b) Wiring between Detector and Converter (when grounding for detector is

difficult)

Ground terminal

Conductive material pipe

Example: Metal, etc.

Non-conductive material pipe

Example: Resin pipe or metal pipe which

is internally coated with resin

Grounding wire

Ground terminal

Grounding wire

When piping material is non-conductive

Carry out class D grounding work

(grounding resistance 100 or less).

Class D ground

(Ground resistance

100 or less)

When piping material is conductive

Connect the grounding wires to both

ends of the piping flange.

Figure 5.10 Detector Grounding Method

6F8A0917

5.5 Digital I/O Connections

Digital I/O terminals consist of four contact output terminals (DO1 to DO4) and two voltage signal

input terminals (DI1 and DI2), and each terminal is isolated from internal circuits.

The terminal CO2 is the signal common for DO2 to DO4 and the terminal CI is the signal common for

DI1 and DI2. For details, see 10. “Function Description.”

The function of each terminal can be selected by settings.

For details, see 10. “Function Description.”

To drive an electromagnetic relay or electromagnetic counter using a digital output, connect a

surge-absorbing diode into the input circuit of the relay or the counter. Figure 5.11 shows a connection

example.

CI DI DO2 to

DO4 DO1CO2CO1

Photo-coupler

(Option)

Solid-state contact

(Option)

Transistor open collector

(Standard)

Resistor

(Option)

Converter inside

DC power supply

24VDC * Note 1

Surge absorbing diode

Electromagnetic counter

* Note 1 Use a surge-absorbing diode of rated current 1A and rated withstand voltage 200 V minimum.

* Note 2 In the case of standard specification (without Digital I/O), the solid-state contact, photo-coupler and

resistor are not built in. Leave DO2 to DO4, CO2, DI, DI2 and CI unconnected.

Figure 5.11 Connection Example of Electromagnetic Counter

6F8A0917

5.6 Cautionary Notes on Replacing Converter

5.6.1 Replacing the LF230 Converter

The following precautions must be taken to replace the conventional type LF230 with LF232.

Installation

• Since the hole diameter and pitch for mounting fitting, and the dimensions of the LF232 converter

main unit are the same as those of the LF230 converter, it is possible to replace the converter without

changing the mounting panel, installation space, etc.

• The operation switches of the LF232 are infrared switches. If direct sunlight hits the display and the

operation section or if there is something nearby that easily reflects light, this kind of light becomes

disturbance light and the switch operation may not work correctly. Be careful about the installation

location and angle, or take measures such as providing a sunshade or shield plate so that disturbance

light does not hit the operation section directly.

Wiring

• The positions of the LF232 cable ports are the same as those of the LF230.

• The specifications of the cable ports differ as shown in the table below.

Table 5.2 Comparison of Cable Port Specifications

LF230 LF232

Ports on the housing M27 fine pitch thread

Depth 0.433 inch (11mm)

G1/2

Depth 0.433 inch (11mm)

Material Stainless steel Nylon resin

Attached cable

connection

specifications Waterproof grade IP67 IP67

Appropriate cable

diameter

Excitation and DI/DO cables

φ0.433−0.512 inch

(φ11−13mm)

Other cables

φ0.394−0.472 inch

(φ10−12mm)

φ0.433−0.512 inch

(φ11−13mm)

Conduit connection port R (PT) 1/2 male thread Not provided

Blind plate (seal plate) Waterproof blind plate

attached

Dustproof blind plate attached

* (Note)

Note: The blind plate is not a waterproof type. If it is necessary to install the converter where waterproof

structure is needed, take waterproof measures for unused cable ports such as using sealing plugs sold on

the market.

• Since the terminal block specification of the LF232 is M4 screws, the same as that of the LF230, it is

possible to connect the cables without changing the cable terminals.

6F8A0917

5.6.2 Combination with an Existing Detector (for Large Meter Size)

When the LF232 flowmeter converter (LF232*B for large meter size) is combined with an existing detector of

commercial power excitation method, the excitation current may not become stable because of the difference of the

excitation method.

(Example of symptoms)

• When the excitation current is checked in the CAL mode, the excitation current is not displayed exactly as set

for the converter.

• The indicated value of the excitation current does not stabilize in the CAL mode and the minimum digit cannot

be read.

• The zero point of flow rate at the time of still water measurement is not stable.

If this happens, connect an adjusting capacitor provided for the detector (only for large meter size) between the

terminals X and Y of the terminal block for converter cable as shown below.

This capacitor is not needed if you combine with a detector of square-wave excitation method (guideline date:

manufacture date is 1981 or later).

In addition, if the symptom does not improve when the capacitor is connected, stop using the capacitor.

Terminal block

Connect an attached

capacitor between the

terminals X and Y.

Note: If any symptom described above does not occur when connected

with an existing detector, do not connect this capacitor.

Figure 5.12 How to Connect an Adjusting Capacitor

6F8A0917

5.6.3 Replacement of partially filled pipes type

When detector of partially filled pipes type is replaced from LF502 or LF502(FS2 type) to

LF232*F, please be careful to the following points.

• Installing

In the case of replacement from LF502(FS2 type):

The diameter of hole, width of installation metal fittings of LF232, an external size of the

body of converter are the same. In the installation panel processing, the built-in space, a

change is unnecessary.

Because switch of LF232 is the infrared switch, please avoid a place with the following

factor.

◆Factors to impede infrared switch to operate properly

・Intense light such as direct sunlight and reflected sunlight by window glass or metal plate

・Place where brightness changes always such as ON/OFF of lighting

・Dense smoke or steam near the control panel

・ Those attached on the control panel such as rain (dew drop), snow, ice, mud and oil, and

haze due to their attachment

・ Light reflecting object near the control panel, or reflecting object such as metal plate

placed opposing to the control panel

When any of above factors is considered, take a measure for the proper operation of infrared

switch such as to place a cover or to secure a space for at least a person to stand in front of the

control panel.

When unable to avoid above factors, operate the EMF converter removing the factor by

covering the control panel by hand so that light does not shine on it, by cleaning those attached

on the control panel, or by standing in-between the reflecting object and the control panel to

block the light.

Table 5.3 Case specifications comparison list (Partially filled pipes type)

Model LF502 LF502 (FS2 type) LF232*F

Width of installation （W×H） 220×200 74×370

Size of body（W×H×L）（Note） 325×426×264 234.5×370×150

Note: Cable ground, installation metal fittings are removed from height.

6F8A0917

• Wirering

・ Hole position of cable connection mouth of LF232* F is the same as LF502 (type FS2).

・ Because specifications of cable connection mouth are different in the following points,

Please be careful.

Table 5.4 Cable connection mouth specification comparison list

(Partially filled pipes type)

Model LF502 LF502 (type FS2) LF232*F

Joint of case side (Please use only an

attached cable ground)

M27 slim screw

Depth 0.433 inch (11mm)

G1/2

Depth 0.433 inch (11mm)

Materials Stainless steel Stainless steel Nylon resin

Grade of waterproofing IP67 IP67 IP67

Diameter of conformity

cable

Excitation, optional

cable

φ0.433～0.512 inch

(φ11～13mm)

Others

φ0.394～0.472 inch

(φ10～12mm)

Excitation, DI/DO

cable

φ0.433～0.512 inch

(φ11～13mm)

Others

φ0.394～0.472 inch

(φ10～12mm)

φ0.433～0.512 inch

(φ11～13mm)

Joint of conduit Rc（PT）3/4 male screw R(PT)1/2 male screw None

specifications of

attached cable

ground

Blind Attached waterproofing

blind

Attached waterproofing

blind

Attached protection

against dust blind

(Note)

(Note) There is not waterproofing of a blind. When converter needs waterproofing, please set

waterproof the cable connection mouth.

Terminal block specifications of LF232 are M4 screw terminals same as LF502.

Change of terminal processing of cable is unnecessary.

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6. Operation

Do not touch the LF232 main body when high

temperature fluid is being measured.

DON’T

The fluid raises the main body

temperature and can cause burns

when touched.

For operation, follow the procedure described below.

Inspection for each part

Is the wiring and connection between the detector and converter correct?

Is the wiring between the converter and related instruments correct?

Isn’t tightening of connection between the detector and the mating pipe

forgotten?

Is the direction of arrow of the detector in accordance with the direction of

actual fluid?

Are the detector and the converter grounded securely?

Is the converter cover securely tightened?

Check the items above.

Introducing water

Let the fluid go through and fill the detector pipe. (Note)

When the detector pipe is filled with fluid, stop the fluid and keep it still.

In the case of the flowmeter which is partially filled pipes type, please let a fluid

stand still at water level high as possible more than water level 30%.

Applying power supply

Is the power supply as specified?

Checking the converter settings

* See 7. “Display and Controls,” 8. “Parameter Settings/Adjustment,” and 11.

“Communications Function.”

Zero adjustment

Wait for 30 minutes to warm up the flowmeter. Then perform zero adjustment.

(Check that the fluid remains still)

* See 8.5.1 “Still Water Zero Adjustment.”

Operation

After checking the items and performing adjustment listed above, let the fluid go through the detector

pipe. Then the outputs such as current output (4 to 20mADC) directly proportional to the flow rate can

be obtained.

6F8A0917

Note: If the fluid to be measured is not filled in the detector pipe (When detector is partially

filled pipes type, water level is not enough), flow rate becomes inconsistent and

measurement cannot be performed correctly.

Be sure to use the flowmeter while the fluid to be measured is filled in the detector pipe.

6F8A0917

7. Display and Controls

For the LF232 converter, the measured value can be displayed and the parameters can be checked or

set using the LCD display and operation switches.

The operation switches are non-contact type (infrared method) and can be operated without opening

the converter cover (operable also while the cover is opened).

Observe the following precautions when you open the converter cover:

• Do not allow the converter exposed to rain and wind.

Adjustment in the rain may cause damage to the parts and may cause electric

shock and it is very dangerous.

In addition, if wind-blown dust enters the electronic circuits in the converter,

this may cause malfunction of the converter.

• Do not open the converter cover under high humidity condition

Opening the converter cover under high humidity condition can cause

deterioration of system accuracy or cause damage to the flowmeter parts.

Display and controls

(Cover Closed Condition) (Cover Opened Condition)

Figure 7.1 Display and Controls

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7.1 Names and Functions of Display and Controls

Display

Operation switch

(Infrared switch)

Figure 7.2 Display and Controls

LCD display

A 16-character × 2-line liquid crystal display with backlight is used.

Instantaneous flow rate and total flow, and various constants such as parameters can be displayed.

In addition, the backlight is always lit and data can be read clearly even in a dark place.

Operation switch (infrared switch)

Operation switches are infrared switches and the operation can be carried out without opening the

housing cover and operable also with the cover opened.

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Instructions

The operation principle of infrared switch is to irradiate infrared to the

front of control panel and detect the reflection from finger when operating.

Normal operation is impeded depending on the conditions such as

disturbing light from surroundings or stain attached to the control panel.

When unable to avoid such condition, operate the EMF converter in the

following manner.

Remove the factor to impede proper operation of infrared switch as below:

・ Cover the control panel by hand so that light does not shine on it

・ Clean the stain attached on the control panel

・ Clean the stain on the finger or the gloves to operate the EMF

converter, or wear gloves in light color

・ When there is a reflecting object placed opposing to the control panel,

stand in-between the reflecting object and the control panel to block

the light

Following are considered as the factors to impede infrared switch to

operate properly.

・ Intense light such as direct sunlight and reflected sunlight by window

glass or metal plate

・ Place where brightness changes always such as ON/OFF of lighting

・ Dense smoke or steam near the control panel

・ Those attached on the control panel such as rain (dew drop), snow,

ice, mud and oil, and haze due to their attachment

・ Operation of the control panel by hands wearing gloves in dark color

or stained fingers and gloves

・ Light reflecting object near the control panel, or reflecting object such

as metal plate placed opposing to the control panel

6F8A0917

Functions of each switch

Switch Basic function

• Moves the mode from the measurement mode to menu display

10.00 m/s

100.0 %

ENTER 111

000

(Measurement mode) (Menu lock cancellation screen)

• Moves the mode to the setting, calibration or measurement mode

A1:EX CURR

0.2100A

(Menu display) (Setting mode)

• Writes data in the setting mode.

B1:UNIT 1

(Data being changed) (Data has been changed)

• Changes the numeric value or items in menu display and in the setting,

calibration or measurement mode.

C2:RANGE 1

02.000 m/s

C2:RANGE 1

03.000 m/s

(Data 0.2000m/s) (Data 0.3000m/s)

• Starts or stops the totalizer (total value and pulse output) in the totalizer control

mode.

COUNT CTRL

F 1000 m3

COUNT CTRL

F 1000 m3 C

(Count stops) (Count starts)

• Enables the converter to change the setting value in the setting or calibration

mode and the cursor appears.

D1: DAMPING

00.5 S

D1: DAMPING

00.5 S

(Setting mode) (

Enabled to change the setting value

)

• Moves the cursor (digit) in menu display and in the setting mode

G1: COUNT RATE

1.23E-4 m3

G1: COUNT RATE

1.23E-4 m3

(Cursor at the position of “1”) (Cursor at the position of “2”)

• Resets the totalizer (total value) in the totalizer control mode

COUNT CTRL

F 1000 m3 C

COUNT CTRL

F 0 m3 C

(Counter in operaiton) (Resets the counter)

(*note)

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Note : There is not this screen to the converter before serial No.072320999.

( Menu screen is displayed. Menu lock cancellation screen is not displayed. )

Switch Basic function

• Returns the screen from the parameter display screen to the menu display

screen.

• Returns the screen from the parameter input screen (Cursor ON) or

adjustment wait screen to the parameter display screen.

• Cancels the parameter input check screen (screen blinks) and returns to the

parameter input screen.

• If pressed while menu display screen is displayed, Function [MEAS MODE]

to return to the measurement mode appears.

(If MENU/ENT is pressed under that condition, the mode returns to the

measurement mode.)

7.2 Display Format

In the measurement mode, the measured data is displayed in the unit set by UNIT 1 and UNIT 2 in the

setting mode. (To set the unit, see 8.2.6 " Normal Indicating Unit ")

Displayed in the unit set by UNIT 1

In the case of total count display,

“C” appears while counting is in

progress.

Displayed in the unit set by UNIT 2

While communication is in

progress, “ ” appears.

Measured value display format

(1) Flow velocity value and instantaneous flow rate display

4 significant digits (for the span flow rate)

- 1 0 . 0 0 m l / s

Time unit

Flow unit

Numeric value is indicated in 7 digits including a

decimal point. (Up to 9999999)

Flow direction: Forward direction “ ” (blank)

Reverse direction “ − ”

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(2) Total count display

F 9 9 9 9 9 9 9 9 C

“C” is displayed when counting is in progress.

Total value is displayed in the unit of count

When the count exceeds the maximum value of

99999999, the count will be reset to 0 and will be

counted again.

In the case of forward flow count, “F” is displayed.

In the case of reverse flow count, “R” is displayed.

(3) Total flow value display

Displayed to the least significant digit of the set pulse

rate.

F 9 9 9 . 9 9 m l C

“C” is displayed when counting is in progress.

Flow unit

Numeric value is indicated in 8 digits including a

decimal point.

(Total valve is displayed up to 99999999, and when

the total count exceeds the maximum value of

99999999, the total valve will be reset to 0 and will be

counted again.)

In the case of forward flow count, “F” is displayed.

In the case of reverse flow count, “R” is displayed.

(4) Total difference flow value display

Displayed to the least significant digit of the set pulse

rate.

+ 9 9 9 . 9 9 m l C

“C” is displayed when counting is in progress.

Flow unit

Numeric value is indicated up to 8 digits including a

decimal point.

If forward flow count ≧ reverse flow count, “+” is

displayed.

If reverse flow count › forward flow count, “−” is

displayed.

For total difference flow value, the difference between the forward direction value and the reverse

direction value is displayed.

6F8A0917

Notes on total flow value display

Note 1: The total flow value and the total difference flow value are displayed to the least

significant digit of the set count rate.

Example: When the set count rate is 0.0001 m3

Total flow / total difference flow display becomes and the value

increases in increments of 0.0001 m3.

If the value reaches , the display changes to at the

next count.

In the end, the display becomes .

When the set count rate is 10 m3

The display becomes and the value increases in increments

10 m3.

Note 2: In the case of total difference flow display, if the forward direction total flow value or

reverse direction total flow value exceeds 9,999,999, only the total value that exceeded

9,999,999 will be reset to 0 and the count continues.

Example: When the forward direction value returns to zero after it reaches the

maximum value

Forward direction:1000

Reverse direction:− 100

Flow difference: 900

→

Forward direction:

99999999

Reverse direction: − 100

Flow difference: 99999999

→

Forward direction: 0

Reverse direction:− 100

Flow difference: − 100

* In an example shown above, if the forward direction flow value is reset to zero

after reaching 99999999, flow difference indication changes from 99999899 to

−100 and the count continues.

(5) Percent display

Displayed to one decimal place (0.1%).

- 1 0 0 . 0 %

Up to 125.0% is displayed.

Flow direction: Forward direction “ ” (blank)

Reverse direction “ − ”

(6) Custom unit display

- 1 0 . 0 T E S T 1 2 3

Unit can be displayed up to 7 digits.

Value is indicated in 8 digits including a decimal point.

(Up to 9999999)

4 significant digits: m3/min value multiplied by the set

coefficient

Flow direction: Forward direction “ ” (blank)

Reverse direction ” − ”

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(7) Error message / other message display

E X C U R R E N T O P E N

If an error or alarm condition occurs, a message is displayed in the 2nd line.

(8) Fixed output display

* F I X O U T 2 0 . 0 m A

In the fixed output mode, a message is displayed in the 2nd line.

7.3 Basic Operations (

Mode Switching, Setting Mode Operation, Total Counter Operation

)

7.3.1 Mode Switching

(1) Types of mode

The following operation modes are provided in the LF232 converter and they can be changed by

operation switches.

• Measurement mode: This is the mode used at the time of flow measurement

The process value is displayed and output.

The flowmeter first goes to this mode when power is turned on.

• Totalizer operation mode: Totalizer can be started, stopped and reset.

For output, the process value is output in the same way as in the

measurement mode.

For details, see 7.3.4 “Totalizer Operation.”

• Setting mode: This is the mode to check or set various parameters.

Parameters can be selected from function menu.

Though various parameters are shown on the display, the process value is output

in the same way as in the measurement mode.

For details, see 8.2 “Parameter Check/Change.”

The following mode can also be selected using menu in the setting mode.

• Fixed value output mode (loop check): This is the mode in which 4 to 20mA output and the

totalizer pulse output frequency can be fixed to a preset

value.

For details, see 8.4 “Fixed Value Output (Loop Check).”

• Zero adjustment mode: This is the mode in which zero adjustment can be performed.

The process value is output in the same way as in the measurement

mode.

For details, see 8.5 “Zero Adjustment.”

• Calibration mode: This is the mode to check the circuits of the converter unit.

Zero point and span can be checked using the internal generator circuit that

generates simulation signals. Excitation current can also be checked.

The current output becomes the value corresponding to the simulation signal.

For digital output, the last value before entering the calibration mode will be

held.

For details, see 9. “Mag-Prover Calibration.”

6F8A0917

(2) Mode switching operation flow

MENU/ENT , , and CANCEL shown in the flow diagram below indicate the switch

operations and when the indicated switch is pressed, the process moves to the item indicated by

the corresponding arrow Æ.

>1:SET

2:CNT CTRL

10.00 m/s

100.0 %

COUNT CTRL

F 1000 m 3

1:MANUAL ZERO

A1:EX CURRENT

A0:MEAS MODE

A 1:EX CURRENT

A2:METER SIZE

Measurement mode

Press longer

for 3 seconds.

*(Note 2)

Mode Selection

Screen

*(Note 1)

(Set “0” to the 1st

digit of the function

code and press

MENU/ENT)

*(Note 2)

Setting mode

(Menu display)

Totalizer operation mode

(Point the cursor (>)

to SET.)

(Point the cursor (>) to

CNT CNTRL.)

ENTER111

000 V****

*(Note 3)

Input [111]

Not [111]

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Note 1: If password is set, the password selection screen appears.

For details, see 7.3.3, “Password Input.”

Note 2: If no operation is performed

for one minute while the mode selection screen or the

setting mode menu screen is displayed, the screen returns to the measurement

screen

Note 3: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

6F8A0917

7.3.2 Setting Mode Operation

Proceed as follows to select the desired item and check or change the setting values.

* Switch operation indicates the switches to press.

Moving to the menu display

Switch operation Display example Description

−

10.00 m/s

100.0 % Measured value being displayed (measurement mode)

ENTER111

000 V****

Pressing MENU/ENT in the measurement mode for 3 seconds

or more, the screen moves to the menu lock cancellation

screen.

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

ENTER111

111 V****

Set the menu lock cancellation cord [111] by

pressing and .

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

>1:SET

2:CNT CTRL

Pressing MENU/ENT in the measurement mode for 3 seconds

or more, the screen moves to the mode selection screen.

A1:EX CURRENT

Select 1:SET in the mode selection screen and press

MENU/ENT . Then the menu screen appears.

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

B1:UNIT 1 Pressing , the function number (a combination of a letter

and a number) changes.

B1:UNIT 1

Pressing , the cursor moves.

* If the cursor is positioned at the digit of number, pressing

moves the cursor to the digit of letter.

C2:RANGE 1 Likewise, set the function number to the one you want to check

or change by pressing and .

Note1

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To return from the menu display to the measurement mode

Switch operation Display example Description

C0: MEAS MODE Set the digit of number for function number to “0” by pressing

and (Note2). The digit of letter can be set to any letter.

10.00 m/s

100.0 %

The mode returns to the measurement mode (measured value

display screen).

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

Note2:Pressing CANCEL changes the digit of number to “0” (*0:MEAS MODE).

Then pressing MENU/ENT under that condition brings you back to the measurement mode with

minimum operations.

6F8A0917

Checking or changing the setting values

Switch operation Display example Description

C2: RANGE 1

Menu display

Select the desired item to check or change using and .

C2 (RANGE 1) in this example.

C2: RANGE 1

2.00000 m/s

Press MENU/ENT to decide the item to check or change.

The cursor disappears and the currently set value appears for

you to check. Pressing CANCEL under this condition brings

you back to the previous screen.

C2: RANGE 1

2.00000 m/s

Pressing , the cursor appears at the position of the set value

and enables the set value to be changed.

Pressing CANCEL under this condition, the cursor disappears

and the screen returns to the setting value check screen

(previous screen).

C2: RANGE 1

3.00000 m/s

Setting value changeable condition

Pressing , the setting value increases.

* If the cursor is positioned at the unit, pressing moves the

unit to the next unit.

C2: RANGE 1

3.0000 m/s Pressing , the cursor moves to the next digit.

C2: RANGE 1

5.00000 m/s

Press and to change the setting value.

In this example, set the value to 5.000m/s.

C2: RANGE 1

5.00000 m/s

Pressing MENU/ENT changes to the condition that data is

temporarily set and the entire data blinks.

( )

C2: RANGE 1

2.00000 m/s

If you want to cancel the data change such as when the

temporarily set data has an error, press CANCEL and then the

temporarily set data returns to the previously set value and the

screen returns to the setting value changeable condition.

C2: RANGE 1

5.00000 m/s

Pressing MENU/ENT confirms the data and the changed data

appears.

C2: RANGE 1 Pressing CANCEL returns you to the menu screen.

6F8A0917

7.3.3 Password Input

The password function is provided in the LF232 converter to prevent some functions that affect the

flow measurement from being used or adjusted. If password is set, totalizer cannot be reset.

For the setting menu limited by the password, see 7.4 “Setting Menu List.”

In addition, for how to set password, see 8.2.5 “Password Setting.”

Mode switching flow when password is set

If password is set, when the mode moves from the measurement mode to the menu screen, the

password input screen appears.

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

>1:SET

2:CNT CTRL

10.00 m/s

100.0 %

INPUT PASSWORD

000

Input [111]

Password

input

A1:EX CURRENT COUNT CTRL

F 1000 m 3

(Setting the cursor (>) to SET

and press MENU/SET)

(Setting the cursor (>)

to CNT CNTRL and

press MENU/ENT)

ENTER111

000

Press longer for

3 seconds.

Cancellation

cord input

[CANCEL] or

Code is not [111]

*Note1

V****

6F8A0917

Example of password input (mode selection: SET and password: 123)

Switch operation Display example Description

INPUT PASSWORD

000

The password input screen appears from the measurement

mode. The cursor appears.

Pressing CANCEL , the screen returns to the mode selection

screen.

INPUT PASSWORD

100 Press to change the value to 1.

INPUT PASSWORD

100

120

123

Change the number.

To change the number of other digit, press to move the

cursor to that digit and press to change the number there.

Repeat this operation until 123 appears on the screen.

INPUT PASSWORD

123

The display blinks and the set value is displayed for

conformation.

Pressing MENU/ENT again, the password will be written.

>1:SET

2:CNT CTRL

Regardless of whether the password input is correct or not, the

screen changes to the mode selection screen.

However, if the password input is erroneous, the setting value

cannot be changed and calibration cannot be performed.

6F8A0917

7.3.4 Totalizer Operation

In the totalizer operation mode, the totalizer can be started, stopped and reset.

If password is set (if password input does not match), the totalizer can be started or stopped but it

cannot be reset.

Note: To operate the totalizer, it is necessary to set necessary settings for the totalizer.

For details of how to set necessary settings for the totalizer, see 10. “Function

Description.”

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Example of totalizer operation

Switch operation Display example Description

−

10.00 m/s

100.0% (Measurement mode)

ENTER111

000 V****

Pressing MENU/ENT in the measurement mode for 3 seconds

or more, the screen moves to the menu lock cancellation

screen.

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

ENTER111

111 V****

Set the menu lock cancellation cord [111] by

pressing and .

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

>1:SET

2:CNT CTRL Press MENU/ENT longer for 3 seconds.

1:SET

>2:CNT CTRL Select CANCEL in the mode selection screen.

COUNT CTRL

F 1000 m3 The totalizer operation screen appears.

COUNT CTRL

F 1000 m3 C

Pressing when the totalizer is stopped, the totalizer starts.

* “C” mark appears indicating that the totalizer has started.

COUNT CTRL

F 1000 m3

Pressing while the totalizer is in operation, the totalizer

stops.

* “C” mark disappears.

COUNT CTRL

F 0 m3

Pressing , the totalizer will be reset to zero.

* If the totalizer is reset, the count value cannot be returned to

the previous value.

10.00 m/s

100.0 % Pressing CANCEL returns you to the measurement mode.

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

Note1

6F8A0917

7.3.5 Maintenance Menu

If you enter the service code to release the protection, the maintenance specific items in the setting

mode that are not displayed normally can be accessed and the parameters that are normally prohibited

to be rewritten can be changed.

This function is mainly used by service personnel, it is not necessary for general customers to enter

this function.

If erroneously operated and the service code input screen appears, either press [CANCEL] to return to

the measurement mode or press [MENU/ENT] to go on to the setting menu. (In this case, protection

will not be released.)

Example to move to the maintenance menu

Switch operation Display example Description

−

10.00 m/s

100.0 % Measured value being displayed (measurement mode)

ENTER111

000 V****

Pressing MENU/ENT in the measurement mode for 3 seconds

or more, the screen moves to the menu lock cancellation

screen.

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

ENTER111

111 V****

Set the menu lock cancellation cord [111] by

pressing and .

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

>1:SET

2:CNT CTRL

Pressing MENU/ENT for 3 seconds or more in the

measurement mode, the screen moves to the mode selection

screen.

INPUT SRV_CODE

000

Select 1:SET in the mode selection screen and press

MENU/ENT for 5 seconds or more, then the screen appears

that is used to enter the service code to release the protection.

Pressing CANCEL in the mode selection screen brings you

back to the measurement mode.

A1:EX CURR

Enter the service code and if it is correct, the maintenance

specific items in the setting menu can be accessed.

Pressing CANCEL in the service code input screen brings you

back to the mode selection screen.

Note1: There is not this screen to the converter before serial No.072320999.

There is not software version (V****) to the converter before version V0109.

Note1

6F8A0917

7.4 Setting Menu List

The constants set in the LF232 converter can be checked or changed in the order shown in the table

below.

The details of each item are described in the following sections:

• Setting items (A to M): Chapter 8. “Parameter Settings / Adjustment”

• Calibration item (N): Chapter 9. “Mag-Prover Calibration”

0 1 2 3 4 5 6 7 8

A Exciting

current setting

Meter size *1 Exciting

frequency *1

Flow direction

setting *1

Password *1

B Main display

unit

Sub display

unit

Custom

coefficient *1

Custom unit

C Range type *1 Range 1 *1 Range 2 *1 Range 3 *1 Range 4 *1 Hysteresis *1

D Damping

constant

Low cutoff

value

Current output

setting for

alarm *1

Display low

cut

On/Off

Output low

limit setting

E Still water

zero

adjustment

F Digital output

1 *1

Digital output

2 *1

Digital output

3 *1

Digital output

4 *1

DO1 alarm

output state *1

DO2 alarm

output state *1

DO3 alarm

output state *1

DO4 alarm

output state *1

G Digital input 1

Digital input 2

DI1 control

signal level

setting *1

DI2 control

signal level

setting *1

H Count rate *1 Pulse width

setting mode

Pulse width *1

I Preset count

value *1

Preset output

setting *1

J High limit

alarm On/Off

High limit

value setting

Low limit

alarm On/Off

Low limit

value setting

K High high

limit alarm

On/Off *1

High high

limit value

setting *1

Low low limit

value On/Off

Low low limit

value setting

L Fluid empty

alarm *1

Self-diagnosis

On/Off *1

Alarm output

preset *1

M Rate-of-chang

e limit

Control time

N Fixed value

output *1

Fixed current

Fixed pulse *1

O Zero offset

Return to measurement mode

Flow value

calibration *1

50%

Flow value

calibration

100%

Flow value

calibration *1

Exciting

current

monitor

Note 1: For items marked by *1 in the table above, if you enter a wrong password, you can check the setting value but

you cannot change or adjust the setting value.

6F8A0917

8. Parameter Settings / Adjustment

8.1 Parameter Setting Items

To check or change each constant set in the LF232 converter, first select the desired setting item

described in 7.3.2, “Setting Mode Operation.”

For setting mode items, follow the explanation below to perform the settings.

No. Setting item Display example

8.2.1 Exciting current value A1: EX CURR 0.2100 A

8.2.2 Meter size A2: METER SIZE 50 mm

8.2.3 Exciting frequency A3: EX FREQ 24 Hz

8.2.4 Flow direction A4: FLOW DIRCTN 1:NORMAL

8.2.5 Password setting A5: PASSWORD 123

8.2.6 Normal display unit B1: UNIT 1 m3/h

8.2.7 Custom unit setting B3: CUSTOM DATA

B4: CUSTOM UNIT

12340.00

TEST123

8.2.8

Range type

Span value

Hysteresis

C1: RANGE TYPE

C2: RANGE 1

C6: RANGE HYST

1:SINGLE

01.000 m3/h

05.0 %

8.2.9 Damping constant D1: DAMPING 05.0 s

8.2.10 Low cutoff value D2: LOW CUT 05.0 %

8.2.11 Current output setting for alarm D3: ALM mA SET 2: 4.0mA

8.2.12 Display low cut On/Off D4: DSP LOW CUT 1: ON

8.2.13 Output low limit setting D5: LOW LIMIT 1: 4.0mA

8.5.1 Still water zero adjustment E1: ZERO ADJUST 0.1 %

Digital output function

Alarm output state

F1: DO1 FUNCT

F5: DO1 ALM STS

1:HIGH ALM

1:NORMAL CLOSE

8.2.14

Digital input function

Control signal level setting

G1: DI1 FUNCTN

G3: DI1 DET LV

2:CNT STA/STP

2:H LEVEL

8.2.15

Count rate

Pulse width mode

Pulse width

H1: COUNT RATE

H2: PLS MODE

H3: PLS WIDTH

1.00000 m3

1:AUTO

020 ms

6F8A0917

No. Setting item Display example

8.2.16 Preset count value

Output function setting

I1: PRESET CNT

I2: PRESET FNC

00009000

1:HOLD

High/Low limit alarm On/Off

High/Low limit alarm value

J1: H ALM SET

J2: H ALM VAL

1:ON

+100.0 %

8.2.17

High high/Low low limit alarm On/Off

High high/Low low limit alarm value

K1: HH ALM SET

K2: HH ALM VAL

1:ON

+110.0 %

8.2.18 Fluid empty alarm L1: EMPTY ALM 1:NORMAL

Self-diagnosis On/Off L2: SELF CHECK 1:ON

8.2.19

Alarm output factor setting L3: ALM PRESET 1:WITHOUT EMP

8.2.20 Rate-of-change limit value

Control time

M1: LIMIT RATE

M2: LIMIT TIME

05.5 %

01 s

8.4 Fixed value output (Loop check)

N1: FIXED OUT

N2: FIXED CURR

N3: FIXED PULSE

OFF

20.0 mA

1000 pps

8.5.2 Zero offset adjustment O1: MANUAL ZERO -000.1 %

8.2 Parameters Check / Change

8.2.1 Exciting Current Value

The exciting current value is already adjusted when the product is shipped from the factory. Normally the

exciting current value is set to the same value as described on the detector nameplate.

Checking the exciting current value

Proceed as follows to check or change the exciting current value.

Switch operation Display example Description

A1: EX. CURR.

0.2100A

Select A1: EX. CURR. from the setting item selection menu.

The currently set exciting current value appears.

A1: EX. CURR. Returns to the menu of setting item selection.

6F8A0917

Changing the exciting current value

To change the exciting current value, proceed as follows. However, the exciting current value is already

adjusted when the product is shipped from the factory. Do not change the exciting current value unless the

value is different from the one described on the detector nameplate. If you change this value to other value,

this may cause an error.

The following is an example to change the exciting current value from 0.1900A to 0.2150A.

Switch operation Display example Description

A1: EX. CURR.

0.1900A

Select A1:EX. CURR. from the setting item selection menu.

The currently set exciting current value (0.1900A in this

example) appears.

A1: EX. CURR.

0.1900A

The cursor appears.

Press further to move the cursor to the desired digit.

A1: EX. CURR.

0.2900A

0.2100A

0.2150A

Change the number of the digit.

To change the number of other digit, press to move the

cursor to that digit and change the number there. Repeat this

operation until 0.2150A appears on the display.

A1: EX. CURR.

0.2150A

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

A1: EX. CURR. Returns to the menu of setting item selection.

Note: Set the exciting current value within the range shown below:

• For small and medium meter size detectors (LF232*A) 0.0500A to 0.2300A

• For large meter size detectors (LF232*B) 0.0500A to 3.000A

• For partially filled pipes detectors (LF232*F) 0.0500A to 1.500A

If you set an exciting current value outside of the settable range, a message such as *H. OVER

SPEC. appears and the value returns to the previous value. Try to set a new value again.

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8.2.2 Meter Size

Checking the meter size of the detector

Proceed as follows to check or change the meter size of the detector.

Switch operation Display example Description

A2: METER SIZE

50 mm

Select A2: METER SIZE from the setting item selection menu.

The currently set meter size of the detector appears.

A2: METER SIZE Returns to the menu of setting item selection.

6F8A0917

Changing the meter size of the detector

The following is an example to change the meter size from 50mm to 10mm.

Switch operation Display example Description

A2: METER SIZE

50 mm

Select A2: METER SIZE from the setting item selection.

The currently set meter size (50mm in this example) appears.

A2: METER SIZE

50 mm The cursor appears.

A2: METER SIZE

100 mm

Change the set value for meter size to 100mm.

The set value for meter size can be changed using switch.

(Note 1)

A2: METER SIZE

100 mm

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

A2: METER SIZE Returns to the menu of setting item selection.

Note 1: The meter size is displayed cyclically as shown below:

* For partially filled pipes detectors (LF232*F) : 6～24inch (150～600mm )

Note 2: If the setting value for meter value is changed, the setting value by flow unit and the setting

value for exciting frequency of no concern may be rewritten.

After the meter size is set, be sure to check the setting values of Range, Count (Pulse) Rate

and Exciting Frequency.

In the case of the converter for large meter

size detector (LF232*B)

600mm2.5mm 700mm 3000mm

0.1inch 24inch 28inch 120inch

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8.2.3 Exciting Frequency

The exciting frequency can be selected from 6Hz, 12Hz and 24Hz. Since the features shown below are

apparent depending on the exciting frequency, select an appropriate exciting frequency.

Exciting frequency 6Hz 12Hz 24Hz

Zero-point stability Good

Response

Good

Fluid noise immunity

Good

However, the range of usable exciting frequency depending on the detector to be combined is shown

below.

Corresponding exciting frequency

Detector

combined Meter size 6Hz 12Hz 24Hz

LF470 1/10",1/6”,1/4" (2.5 to 6 mm) ○ ○ ◎

LF150 26” to 120” (500 to 3000 mm) ◎

−

335 All sizes ◎

−

* Partially filled pipes type LF232*F : Useable only 6Hz

◎ Factory setting

○ Combination allowed

− Combination not allowed

Checking the exciting frequency

Proceed as follows to check or change the setting value for exciting frequency.

Switch operation Display example Description

A3: EX. FREQ.

24 Hz

Select A3: EX. FREQ. from the setting item selection menu.

The currently set exciting frequency appears.

A3: EX. FREQ. Returns to the menu of setting item selection.

6F8A0917

Changing the setting value for exciting frequency.

The following is an example to change the exciting frequency from 24Hz to 12Hz.

Switch operation Display example Description

A3: EX. FREQ.

24 Hz

Select A3: EX FREQ. from the setting item selection menu.

The currently set exciting frequency (24Hz in this example)

appears.

A3: EX. FREQ.

24 Hz The cursor appears.

A3: EX. FREQ.

12 Hz

Change the exciting frequency to 12Hz.

The exciting frequency appears cyclically between 6Hz, 12Hz

and 24Hz. (Note 1)

A3: EX. FREQ.

12 Hz

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

A3: EX. FREQ. Returns to the menu of setting item selection.

Note 1: The exciting frequency is displayed cyclically as shown below.

6Hz 12Hz 24Hz

* Partially filled pipes type LF232*F : Useable only 6Hz

6F8A0917

8.2.4 Flow Direction

The flow direction of fluid can be set.

Normally use the flowmeter under the condition of NORMAL.

Selection item Description

1: NORMAL The flow is a direct flow when the fluid flows in the direction

indicated by the arrow on the detector.

2: SWITCH The flow is a direct flow when the fluid flows in the reverse

direction of the arrow on the detector.

Checking the flow direction.

Proceed as follows to check or change the setting value for direction flow.

Switch operation Display example Description

A4: FLOW DIRCTN

1:NORMAL

Select A4: FLOW DIRCTN from the setting item selection

menu.

The currently set flow direction appears.

A4: FLOW DIRCTN Returns to the menu of setting item selection.

6F8A0917

Changing the flow direction.

The following is an example to show how to change the flow direction from NORMAL to

SWITCH.

Switch operation Display example Description

A4: FLOW DIRCTN

1:NORMAL

Select A4: FLOW DIRCTN from the setting item selection

menu.

The currently set flow direction (NORMAL in this example)

appears.

A4: FLOW DIRCTN

1:NORMAL The cursor appears.

A4: FLOW DIRCTN

2:SWITCH Change the flow direction to SWITCH.

A4: FLOW DIRCTN

2:SWITCH

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

A4: FLOW DIRCTN Returns to the menu of setting item selection.

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8.2.5 Password Setting

The password function is provided to prohibit the settings and adjustment for the functions that affect

the flow measurement. See 7.4 “Setting Menu List” for the functions limited by the password function.

If other than “000” is set for password and the mode is retuned to the measurement mode, the

password function becomes valid. If “000” is set, there is no limitation such as setting is prohibition by

password.

Checking the password

Proceed as follows to check the password.

However, if other than “000” is set for password, you cannot check the password when you move to

the setting mode unless you enter the correct password.

(If you enter a wrong password, *** appears for password.)

Switch operation Display example Description

A5: PASSWORD

123

Select A5: PASSWORD from the setting item selection menu.

The currently set password appears.

A5: PASSWORD Returns to the menu of setting item selection item.

6F8A0917

Changing the password

The following is an example to show how to change the password from 123 to 453.

Switch operation Display example Description

A5: PASSWORD

123

Select A5: PASSWORD from the setting item selection menu.

The currently set password data (123 in this example) appears.

However, if a wrong password is entered when you move from

the measurement mode to the setting mode, *** appears.

A5: PASSWORD

123 The cursor appears.

A5: PASSWORD

423

Press to change the number of the 3rd digit of the password

from the right to 4.

A5: PASSWORD

423 Move the cursor to the 2nd digit.

A5: PASSWORD

453

Press switch to change the number of the 2nd digit of the

password to 5.

A5: PASSWORD

453

The display blinks and the set value is displayed for

conformation.

Press MENU/ENT again to writer the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

A5: PASSWORD Returns to the menu of setting item selection.

Note: If password is set, be sure so manage the system so that the password is protected and not

forgotten.

If you forgot your password, you can check the password using the maintenance menu. For the

procedure to move to the maintenance menu, see 7.3.5 “Maintenance Menu.” The service code

to check the password is “800”.

For the management method including the method to read the password, use the management

method conforming to the management standard of the system used.

6F8A0917

8.2.6 Normal Indicating Unit

You can select one of the units listed below as normal indicating unit for 2 types of units, main unit

(UNIT 1) and sub unit (UNIT 2) to be displayed in the measurement mode.

• Flow velocity unit: m/s, ft/s

• Flow rate unit: m3/s, m3/min, m3/h, m3/d

l/s, l/min, l/h, l/d

ml/s, ml/min, ml/h, ml/d

gal/s, gal/min, gal/h, gal/d

bbl/s, bbl/min, bbl/h, bbl/d

pt/s, pt/min, pt/h, pt/d

qt/s, qt/min, qt/h, qt/d

• Volumetric flow: m3, l, ml, gal, bbl, pt, qt

• Other units: %, COUNT, RANGE, CUSTOM

%: Indicates the value in percent of the setting range

When multi-range is selected, the value is in percent of the range in operation.

COUNT: Indicates the count of the totalizer.

RANGE: Indicates the range number of the range in operation when multi-range is selected.

CUSTOM: Indicates the flow rate value in the unit defined in 8.2.7 “Custom Unit.”

If the unit is set to volumetric flow or COUNT, the flow direction for total flow can be

set.

If the indicting unit is set to volumetric flow or COUNT, the flow direction for total flow can also

be set.

• Volumetric flow direction: F: Forward direction, R: Reverse direction

B: Forward/Reverse automatic switching, D: Total difference flow

indication

Checking the normal indicating unit

Proceed as follows to check the normal indicating unit.

Here, only about the main unit (UNIT1) is explained. For sub unit (UNIT2), select the function

number “B2”.

Switch operation Display example Description

B1: UNIT 1

Select B1: UNIT 1 from the setting item selection menu.

The currently set main indicating unit appears.

B1: UNIT 1 Returns to the menu of setting item selection.

6F8A0917

Checking the normal indicating unit

The following is an example to change the main indicating unit (UNIT1) from % to ml/s.

In the case of sub unit (UNIT2), select the function “B2: UNIT 2.”

Switch operation Display example Description

B1: UNIT 1

Select B1: UNIT 1 from the setting item selection menu.

The currently set main indicating unit (% in this example)

appears.

B1: UNIT 1

% The cursor appears.

B1: UNIT 1

ml B Change the volumetric unit to ml. (Note 1)

B1: UNIT 1

ml B Move the cursor to the position of time unit.

B1: UNIT 1

ml/s Change the time unit to s. (Note 2)

B1: UNIT 1

ml/s

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

B1: UNIT 1 Returns to the menu of setting item selection.

Note 1: Volumetric unit is displayed cyclically as follows:

Note 2: Time unit is displayed cyclically loops as follows:

3ml

RANGE COUNT ft/s

lgal bbl

m/s

min

d(Space)

6F8A0917

Changing the flow direction for total flow

Proceed as follows to change the flow direction for total flow.

The following is an example to show how to change the main indicating unit from Forward flow

(F) to Forward/Rverse automatic switching (B).

In the case of sub unit (UNIT2), select the function “B2: UNIT 2.”

Switch operation Display example Description

B1: UNIT 1

m3 F

Select B1: UNIT 1 from the setting item selection menu.

The currently set main indicating unit (m3 F in this example)

appears.

B1: UNIT 1

m3 F The cursor appears.

B1: UNIT 1

m3 F Move the cursor to the position of time unit.

B1: UNIT 1

m3 F Move the cursor to the position of flow direction for total flow.

B1: UNIT 1

m3 B

Change the flow direction for total flow to B (forward/reverse

automatic switching). (Note 1)

B1: UNIT 1

m3 B

The display blinks and the set value is displayed for

conformation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

B1: UNIT 1 Returns to the menu of setting item selection.

Note 1: The flow direction for total flow is displayed cyclically as follows:

B (Forward/Reverse automatic switching) F (Forward direction)

R (Reverse direction)

6F8A0917

8.2.7 Custom Unit

The custom unit, which indicates the flow rate multiplied by an arbitrary coefficient, can be defined.

The flow rate indication using the custom unit defined here can be used by selecting CUSTOM in the

indicting unit setting.

The custom unit consists of an coefficient and a unit string

Coefficient of custom unit

A coefficient to determine the numeric value for indication by custom unit

The indicated value is calculated in the following equation:

Custom unit indication (numeric value) = Measured value in m3/min × Custom coefficient

The custom coefficient can be set in a numeric value of 6 digits including a decimal point.

Unit string of custom unit

The unit to be used for indication by custom unit

A string of up to 7 characters using the following codes can be set.

Alphabetic letters (lower case letters) : a − z

Alphabetic letters (upper case letters) : A − Z

Number: 0

− 9

Symbol: ( ) ····· Parentheses

% ········· Percent

. ··········· Period (dot)

⋅ ··········· Point

: ··········· Colon

= ·········· Equal sign

− ·········· Minus (hyphen)

* ·········· Asterisk

/ ··········· Slash

········· Space (blank)

6F8A0917

Checking the coefficient of custom unit

Proceed as follows to check the coefficient of custom unit.

Switch operation Display example Description

B3: CUSTOM DATA

12340.00

Select B3: CUSTOM DATA from the setting item selection

menu.

The currently selected coefficient appears.

B3: CUSTOM DATA Returns to the menu of setting item selection.

Changing the coefficient of custom unit

The following is an example to show how to change the coefficient from 1.00 to 1.25.

Switch operation Display example Description

B3: CUSTOM DATA

1.000000

Select B3: CUSTOM DATA from the setting item selection

menu.

The currently set coefficient appears.

B3: CUSTOM DATA

1.000000

The cursor appears.

Press further to move the cursor to the desired digit to

change.

▲

B3: CUSTOM DATA

1.200000

↓

1.250000

Change the number of the digit.

To change other digit, press to move the cursor to that digit

and change the number there. Repeat this operation until

1.250000 appears on the display.

B3: CUSTOM DATA

1.250000

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

B3: CUSTOM DATA Returns to the menu of setting item selection.

6F8A0917

Checking the unit string of custom unit

Proceed as follows to check the unit string of custom unit.

Switch operation Display example Description

B4: CUSTOM UNIT

AAA/BBB

Select B4: CUSTOM DATA from the setting item selection

menu.

The currently set unit appears.

B4: CUSTOM UNIT Returns to the menu of setting item selection.

Changing the unit string of custom unit

The following is an example to show how to change the unit string from AAA/BBB to XXX/ZZZ.

Switch operation Display example Description

B4: CUSTOM UNIT

AAA/BBB

Select B4: CUSTOM UNIT from the setting item selection

menu.

The currently set unit appears.

B4: CUSTOM UNIT

AAA/BBB

The cursor appears.

Press further to move the cursor to the desired digit to

change.

B4: CUSTOM UNIT

XAA/BBB

↓

XXX/ZZZ

Change the character of the digit. (Note 1)

To change other digit, press to move the cursor to that digit

and change the character there. Repeat this operation until

XXX/ZZZ appears on the display.

B4: CUSTOM UNIT

XXX/ZZZ

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the set

value is displayed.

B4: CUSTOM UNIT Returns to the menu of setting item selection.

Note 1: The selectable characters are displayed cyclically as shown below:

Alphabet letter (lowercase) Alphabet letter (uppercase)

Symbol Number

6F8A0917

8.2.8 Span Value (Range)

The following constants are set here.

(1) Range type

(2) Span unit (changeable only for Range 1)

(3) Span value

(4) Hysteresis

Range type

By selecting the range type, the multi-range function can be used in which the range in operation is

switched between the multiple ranges depending on whether the flow rate is value large or small, or

the flow direction is forward or reverse.

If it is not necessary to use the multi-range function, set the Range type to Single range.

RANGE TYPE RANGE TYPE

1:SINGLE Single range

2:4F-0R Single direction, 4 ranges Internal automatic switching

3:2F-2R Forward/reverse direction, 2 ranges Internal automatic switching

4:EXT.2F-0R Single direction, 2 ranges External signal switching

5:EXT.2F-2R Forward/reverse direction, 2 ranges External signal switching

6:EXT.4F-0R Single direction, 4 ranges External signal switching

Note: To use the multi-range function, the following DO and DI are required:

In the case of internal automatic switching ranges

2 ranges, forward/reverse range·························1 Digital Output

3 ranges or more, forward/reverse 2 ranges·······2 Digital Outputs

In the case of external signal switching ranges

2 ranges, forward/reverse range·························1 Digital Inputs

3 ranges or more, forward/reverse 2 ranges·······2 Digital Inputs

6F8A0917

Span value

The span value can be set using the actual flow rate unit (m3/h, etc.) and flow velocity unit (m/s).

(1) Setting range

The span value can be set within the range of 0 –1.0 ft/s to 0 – 32.8 ft/s (0.1m/s to 10m/s) in terms

of flow velocity

(The range that detector can measure changes with detector type. The details please refer to

Chapter 15 "specifications")

If you try to set a span value outside of this range, either of the following messages appears

depending on whether it is a high limit or low limit error:

* H. OVER SPEC. (if a value exceeding 32.8 ft/s (10 m/s) is set)

* L. OVER SPEC. (if a value of less than 1.0 ft/s (0.1 m/s) is set)

Try to set a new value again.

In the case of Single range setting, select Range 1 only.

(2) Multi-range setting

To use the multi-range function, select Ranges 1 to 4.

When you set these ranges, the following condition must be observed:

Range 1 > Range 2 > Range 3 > Range 4 (in the case of single direction, multiple ranges)

Range 1 > Range 2, Range 3 > Range 4 (in the case of forward/reverse direction, multiple

ranges)

If you try to set the ranges not conforming to the above condition, the following message appears:

* MULTI RNG ERR

Try to set the ranges again.

In addition, set “0” for the ranges not used.

(3) Influence on count rate (pulse rate)

If the range is changed when the count rate (pulse rate) is already set, pulse output at the time of

100% output may exceed the allowable output range.

If this happens, either of the following messages appears after the ranges are set and the system

goes to the count rate setting.

* H. OVER C RATE or * L. OVER C RATE

Try to set the count rate (pulse rate) again referring to 8.2.15 “Count Rate (pulse rate) and Pulse

Width.”

Unit of span

Range 1 is used to set the unit of span. The unit applies automatically to other ranges of Range 2 to

Range 4 and it is not necessary to set the unit for these ranges separately.

The setting units can be selected from the following units:

• Flow velocity unit: m/s

• Flow rate unit: m3/s, m3/min, m3/h, m3/d, l/s, l/min, l/h, l/d, ml/s, ml/min, ml/h, ml/d

If you change the unit, the new span value based on the newly set unit will be automatically

displayed.

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Hysteresis

The dead band, which is used to switch the ranges in the case of internal automatic switching

multi-range, is set here.

It is not necessary to set hysteresis in other range types. (The set value will be ignored.)

The hysteresis can be set within the range of 0 to 25% in increments of 0.1%.

Span value (range) setting flow

The setting sequence of span value (range) is shown below.

Item selection of span value (range) setting

C1: RANGE TYPE : Range type setting

C2: RANGE 1 : Range 1 span value and unit setting

C3: RANGE 2 : Range 2 span value

C4: RANGE 3 : Range 3 span value

C5: RANGE 4 : Range 4 span value

C6: RANGE HYST : Hysteresis setting

6F8A0917

Checking each constant

How to check the Range 1 is shown here.

To check other setting values, select the following function numbers:

Range type C1: RANGE TYPE

Range 2 span value C3: RANGE 2

Range 3 span value C4: RANGE 3

Range 4 span value C5: RANGE 4

Hysteresis C6: RANGE HYST

Switch operation Display example Description

C2: RANGE 1

02.000 m/s

Select C2:RANGE 1 from the setting item selection menu.

The currently set Range 1 span value appears.

C2: RANGE 1 Returns to the menu of setting item selection.

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Changing the range type

Before changing the span value, Rang type must be set.

The following is an example to show how to change the range type from Single range (1:SINGLE)

to the bidirectional internal signal switching multi-range (3:2F-2R).

Switch operation Display example Description

C1: RANGE TYPE

1:SINGLE

Select C1: RANGE TYPE from the setting item selection

menu.

The currently set range type (1:SINGLE) appears.

C1: RANGE TYPE

1:SINGLE The cursor appears.

C1: RANGE TYPE

3:2F-2R Select the range type 3:2F-2R.

C1: RANGE TYPE

3:2F-2R

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the set

value is displayed.

C1: RANGE TYPE Returns to the menu of setting item selection.

6F8A0917

Changing the span value

The span value for each range is set.

The following is an example to show how to change the span value of Range 1 from 2.0m3/h to 100

l/min.

Switch operation Display example Description

C2: RANGE 1

2.0000 m3/h

Select C2: RANGE 1 from the setting item selection menu.

The currently set span value for Range 1 (2.0 m3/h in this

example) appears.

C2: RANGE 1

2.0000 m3/h

The cursor appears.

Press further to move the cursor to the digit of volumetric

unit.

C2: RANGE 1

2000.0 l/h

↓

33.333 l/min

Change the volumetric unit to l.

Press to move the cursor to the digit of time unit and

likewise change the unit to min. (Note)

(The span value will be automatically changed as this unit is

changed.)

C2: RANGE 1

33.333 l/min Move the cursor to the desired digit to change.

C2: RANGE 1

13.333 l/min

↓

100.00 l/min

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

C2: RANGE 1

100.00 l/min

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. The cursor

disappears and returns to the condition that the set value is

displayed.

C2: RANGE 1 Returns to the menu of setting item selection.

Note: The items of unit are displayed cyclically as shown below:

• A combination of m/min, m/h , m/d, ft/min, ft/h and ft/d cannot be selected.

3l gal

min

Volumetric unit Time unit

bbl

ptqt

6F8A0917

Changing the hysteresis

The hysteresis value is set to 3% unless otherwise specified when the converter is shipped from the

factory.

The following is an example to show how to change the hysteresis value from 3% to 5%.

Switch operation Display example Description

C6: RANGE HYST

03.0 %

Select C6: RANGE HYST from the setting item selection

menu.

The currently set hysteresis value appears. (Note)

C6: RANGE HYST

03.0 % The cursor appears.

C6: RANGE HYST

03.0 % Move the cursor to the desired digit to change.

C6: RANGE HYST

05.0 %

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

C6: RANGE HYST

05.0 %

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

C6: RANGE HYST Returns to the menu of setting item selection.

Note: If you try to set a value exceeding 25.0%, *H. OVER SPEC.* appears and the value returns to

the previously set value. Try to set a new value again.

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8.2.9 Damping Constant

The damping constant is set to average out the output fluctuations. (The larger the damping constant,

the more the output is averaged and the fluctuations can be reduced but the response becomes slower.)

The damping constant can be set from 0.0sec, 0.5sec, and 1 to 60sec (1sec each).

(If detector is partially filled pipes type, the damping constant can be set from 0.0sec, 5sec, and 10 to

600sec (1sec each).)

Note: If 0.0 sec is set, the damping constant becomes a value equivalent to 0.1 sec.

If you set a value exceeding 60s, it is forcibly changed to 60s before data is written.

Checking the damping constant

Proceed as follows to check the damping constant.

Switch operation Display example Description

D1: DAMPING

02.0 s

Select D1: DAMPING from the setting item selection menu.

The currently set damping constant appears.

D1: DAMPING Returns to the menu of setting item selection.

6F8A0917

Changing the damping constant

The following is an example to show how to change the damping constant from 0.5 sec to 10 sec.

Switch operation Display example Description

D1: DAMPING

00.5 s

Select D1: DAMPING from the setting item selection menu.

The currently set damping constant (0.5 s in this example)

appears.

D1: DAMPING

00.5 s

The cursor appears.

Press further to move the cursor to the desired digit to

change.

D1: DAMPING

10.5 s

10.0 s

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number these.

D1: DAMPING

10.0 s

The display

links and the se

value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

D1: DAMPING Returns to the menu of setting item selection.

Note: If you set a value exceeding max value, it is forcibly changed to max value before data is

written.

6F8A0917

8.2.10 Low Cutoff value

The low cutoff is the fuction to forcefully fix the current output to 0% when the flow rate becomes

equal or below the low cutoff value set near 0%.

The low cutoff value can be set from 0 to 10% and in increments of 0.1%.

If 0% is set, the low cutoff function does not work.

Checking the low cutoff value

Proceed as follows to check the low cutoff value.

Switch operation Display example Description

D2: LOW CUT

01.0 %

Select D2: LOW CUT from the setting item selection menu.

The currently set low cutoff value appears.

D2: LOW CUT Returns to the menu of setting item selection.

6F8A0917

Changing the low cutoff value

The following is an example to show how to change the low cutoff value from 1.0% to 3.0%.

Switch operation Display example Description

D2: LOW CUT

01.0 %

Select D2: LOW CUT from the setting item selection menu.

The currently set low cutoff value (1.0 % in this example)

appears.

D2: LOW CUT

01.0 %

The cursor appears.

Press further to move the cursor to the desired digit to

change.

D2: LOW CUT

03.0%

Change the number of the digit.

To change another digit, press under this condition to move

the cursor to that digit and change the number there.

D2: LOW CUT

03.0 %

The display brinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

D2: LOW CUT Returns to the menu of setting item selection.

Note: If you try to set a value exceeding 10.0%, *H. OVER SPEC.* appears and the value returns to

the previously set value. In that case, try to set a new value again.

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8.2.11 Current Output Setting Used When an Alarm Occurs

The current output value setting used when an alarm occurs is the function to fix the current output to

a pre-selected value if a fluid empty alarm or a self-diagnosis alarm occurs.

For the type of alarms to fix the current output, see the alarm output factor setting in 8.2.19

“Self-Diagnosis Function.”

Select the current output value used when an alarm occurs from the table shown below.

Current output setting function used when an alarm occurs

Selection Current output value when an alarm occurs

1:UNDER 3.0mA 3.0mA or less

2:4.0mA 4.0mA

3:HOLD Fixed to the current output

4:OVER 24.0mA 24.0mA or more

Checking the current output value used when an alarm occurs

Proceed as follows to check the current output value used when an alarm occurs.

Switch operation Display example Description

D3: 4-20 ALM.OUT

2:4.0mA

Select D3: 4−20 ALM. OUT from the setting item selection

menu.

The currently set current output value used when an alarm

occurs appears.

D3: 4-20 ALM.OUT Returns to the menu of setting item selection.

6F8A0917

Changing the current output value used when an alarm occurs

The following is an example to show how to change the current output value, which is used when

an alarm occurs, from 4.0mA (2: 4.0mA) to 24.0mA or more (4: OVER 24.0mA).

Switch operation Display example Description

D3: 4-20 ALM.OUT

2:4.0mA

Select D3: 4−20 ALM. OUT from the setting item selection

menu.

The currently set alarm output value used when an alarm

occurs appears.

D3: 4-20 ALM.OUT

2:4.0mA The cursor appears.

D3: 4-20 ALM.OUT

4:OVER 24.0mA Press to select 4: OVER 24.0mA.

D3: 4-20 ALM.OUT

4:OVER 24.0mA

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

D3: 4-20 ALM.OUT Returns to the menu of setting item selection.

6F8A0917

8.2.12 Display low cut On/Off

When the low output is cutoff by the setting in 8.2.10 “Low cutoff value,” whether the instantaneous

flow rate, flow velocity and % value should be set to zero or not can be selected.

Selection Display low cutoff

1: ON Display low cut is effective (On)

Display (instantaneous flow rate, flow velocity and %) will be set to

zero when the low output is cutoff.

2: OFF Display low cut is not effective (Off)

Measured value will be output even if the low output is cutoff.

Checking whether the display low cut is On or Off

Proceed as follows to check whether the display low cut is On or Off.

Switch operation Display example Description

D4: DSP LOW CUT

2:OFF

Select D4: DSP LOW CUT from the setting item selection

menu.

The currently set display low cut On/Off status appears.

D4: DSP LOW CUT Returns to the menu of setting item selection.

6F8A0917

Changing the display low cut On/Off setting.

The following is an example to show how to change the display low cut setting from 2.OFF to

1:ON.

Switch operation Display example Description

D4: DSP LOW CUT

2:OFF

Select D3: 4−20 ALM. OUT from the setting item selection

menu.

The currently set alarm output value used when an alarm

occurs appears.

D4: DSP LOW CUT

2:OFF The cursor appears.

D4: DSP LOW CUT

1:ON Press to select 1:ON.

D4: DSP LOW CUT

1:ON

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the set

value is displayed.

D4: DSP LOW CUT Returns to the menu of setting item selection.

6F8A0917

8.2.13 Output Low Limit Setting

The low limit for 4 to 20mA output can be selected.

If 3.2mA or 2.4mA is selected, the output value of less than 4mA (0%) can be output when the flow is

in reverse direction.

The output low limit setting can be selected from the items shown in the table below.

Output low limit value

Selection Output low limit value

1:4.0mA 4.0mA(0%)

2:3.2mA 3.2mA (-5%)

3:2.4mA 2.4mA (-10%)

* To set the output low limit to other than 4.0mA, set the low cutoff value to 0% in 8.2.10 “Low

Cutoff Value.”

If the low cutoff value is set to other than 0%, the output low limit value becomes 4.0mA fixed

regardless of the value of the output low limit setting.

Checking the output low limit value setting.

Proceed as follows to check the output low limit value.

Switch operation Display example Description

D5: LOW LIMIT

1:4.0mA

Select D5: LOW LIMIT from the setting item selection menu.

The currently set output low limit value appears.

D5: LOW LIMIT Returns to the menu of setting item selection.

6F8A0917

Changing the output low limit value setting.

The following is an example to change the output low limit setting from 4.0mA (1: 4.0mA) to

3.2mA (2: 3.2mA).

Switch operation Display example Description

D5: LOW LIMIT

1:4.0mA

Select D5: LOW LIMIT from the setting item selection menu.

The currently set output low limit value appears.

D5: LOW LIMIT

1:4.0mA The cursor appears.

D5: LOW LIMIT

2:3.2mA Press to select 2:3.2mA.

D5: LOW LIMIT

2:3.2mA

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

D5: LOW LIMIT Returns to the menu of setting item selection.

6F8A0917

8.2.14 Digital I/O Function

Digital I/O functions can be selected.

Select the digital I/O functions from the items shown below.

For details of digital I/O functions, see 10. “Function Description.”

Digital output functions (corresponding to each terminal)

DO FUNCT. Digital output functions DO1 DO2 DO3 to DO4

1: NO USE Not used

2: HIGH ALM High limit alarm output

3: HH ALM High-high limit alarm output

4: LOW ALM Low limit alarm output

5: LL ALM Low-low limit alarm output

6: RNG SIG 1 Range output No.1

7: RNG SIG 2 Range output No.2

8: PRESET Preset counter output

9: CONV. ALM Converter error alarm output (Note 3)

A: EMPTY ALM Fluid empty alarm output

B: PULSE OUT Pulse output (Note 1) (Note 2)

−

C: PULSE FRD Forward flow pulse output (Note 2)

−

D: PULSE REV Reverse flow pulse output (Note 2)

−

○: Enabled − : Disabled

Note 1: When the range type is set to the forward/reverse multi-range, and the pulse output (8: PULSE OUT) is

selected, pulse output can be sent out in either forward current or reverse current flow.

Note 2: Pulse output using the DO2 can be sent out up to 100pps.

When the pulse output is sent out using the DO2, set the count rate so that the pulse output for full scale

value does not exceed 100pps.

For count rate setting, see 8.2.15 “Count Rate (Pulse Rate) and Pulse Width.”

Note 3: For the types of alarms to output, see the alarm output factor setting in 8.2.19 “Self-Diagnosis

Function.”

Digital output state (only when alarm output is set)

For alarm output function (items indicated by above), alarm output operation can be selected

independently for each DO terminal.

DO ALM ACT Alarm output operation

1: NORMAL CLOSE Normal: Contact closed, When alarm occurs: Contact open

2: NORMAL OPEN Normal: Contact open, When alarm occur: Contact closed

6F8A0917

Digital Input Function

DI FUNCT. Digital input function

1: NO USE Not used

2: C STA/STP Totalizer Start/Stop control

3: C RES/STA Totalizer Reset/Start control

4: RANGE SW1 Multi-range external switching signal 1

5: ZERO ADJ Still water zero adjustment start

6: FIXED OUT Fixed-value output mode control

7: RANGE SW2 Multi-range external switching signal 2

Level setting for digital input control signal (for totalizer control only)

For totalizer control (items indicated by above), the operating level (active level) for input control

signal can be selected for each DI terminal.

DI DET LEVEL Control signal level

1: L LEVEL Low level active

2: H LEVEL High level active

The operation for control signal input is shown below depending on the active level setting.

Digital input function setting Control signal

level setting Operation when control signal is input

L LEVEL High signal: Totalization Stop

Low signal: Totalization Start

CNT STA/STP

(Totalizer Start/Stop) H LEVEL High signal: Totalization Start

Low signal: Totalization Stop

L LEVEL High signal: Totalization Start

Low signal: Totalization Reset

CNT RES/STA

(Totalizer Reset/Start) H LEVEL High signal: Totalization Reset

Low signal: Totalization Start

6F8A0917

Checking each setting for digital I/O

The following is an example to show how to check the function setting of Digital Output 1.

To check other setting values, select the following function numbers.

Digital Output 1 F1: DO1 FNCTN

Digital Output 2 F2: DO2 FNCTN

Digital Output 3 F3: DO3 FNCTN

Digital Output 4 F4: DO4 FNCTN

Digital Output alarm state 1 F5: DO1 ALM STS

Digital Output alarm state 2 F6: DO2 ALM STS

Digital Output alarm state 3 F7: DO3 ALM STS

Digital Output alarm state 4 F8: DO4 ALM STS

Digital Input 1 G1: DI1 FNCTN

Digital Input 2 G2: DI2 FNCTN

Digital Input control signal level 1 G3: DI1 DET LEV

Digital Input control signal level 2 G4: DI2 DET LEV

Switch operation Display example Description

F1: DO1 FNCTN

1:HIGH ALM

Select F1: DO1 FNCTN from the setting item selection menu.

The currently set function of Digital Output 1 appears.

F1: DO1 FNCTN Returns to the menu of setting item selection.

6F8A0917

Changing each setting for digital I/O

The following is an example to show how to change the function of Digital Output 1 from High

limit alarm output (2:HIGH ALM) to Fluid empty alarm (A:EMPTY ALM).

To change other setting values, select the following function numbers.

Digital Output 1 F1: DO1 FNCTN

Digital Output 2 F2: DO2 FNCTN

Digital Output 3 F3: DO3 FNCTN

Digital Output 4 F4: DO4 FNCTN

Digital Output alarm status 1 F5: DO1 ALM STS

Digital Output alarm status 2 F6: DO2 ALM STS

Digital Output alarm status 3 F7: DO3 ALM STS

Digital Output alarm status 4 F8: DO4 ALM STS

Digital Input 1 G1: DI1 FNCTN

Digital Input 2 G2: DI2 FNCTN

Digital Input control signal level 1 G3: DI1 DET LEV

Digital Input control signal level 2 G4: DI2 DET LEV

Switch operation Display example Description

F1: DO1 FNCTN

1:HIGH ALM

Select F1: DO1 FNCTN from the setting item selection menu.

The currently set function of Digital Output 1 appears.

F1: DO1 FNCTN

1:HIGH ALM The cursor appears.

F1: DO1 FNCTN

A:EMPTY ALM Select the output function A:EMPTY ALM.

F1: DO1 FNCTN

A:EMPTY ALM

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

F1: DO1 FNCTN Returns to the menu of setting item selection.

6F8A0917

8.2.15 Count Rate (Pulse Rate) and Pulse Width

Totalizer is incremented each time a volumetric flow set for predetermined count rate enters and one

pulse is sent out through DO output.

It is necessary to set the count rate and pulse width when the total volumetric flow or count value

indication is selected or when pulse output is used.

The following parameters can be set here:

(1) Count rate (Pulse rate)

(2) Pulse width mode

(3) Pulse width

Notes

• To use the pulse output, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.”

If the pulse output is not used and only the total volumetric flow or count value indication is used,

it is not necessary to set the DO function.

• To use the total volumetric flow indication or count value indication, it is necessary to set the

indicating unit.

For how to set the indicating unit, see 8.2.6 “Normal Indicating Unit.”

Even if the pulse output only is used, it is recommended that you set a total volumetric flow unit

or a count value unit as indicating unit to check the operation.

Count rate

A volumetric value per 1 count (1 pulse) for the totalizer is set.

The total volumetric flow is the totalizer count multiplied by the count rate.

• The count rate must be set so that the pulse output at 100% output stays within a range of 3.6 to

3,600,000 pulses/h. If you try to set a value outside of this range, an error message

*H. OVER SPEC* or *L. OVER SPEC*

appears and the value returns to the previously set value. Try to set a new value again.

Example: When the range is 3,600m3/h (1m3/s), the settable count rate is as follows:

Minimum value: 3,600m3/h ÷ 3,600,000 pulses/h = 0.001m3 = 1 l (liter)

Maximum value: 3,600m3/h ÷ 3.6 pulses/h = 1,000m3

Pulse width mode

Whether the pulse width of the totalizer pulse output should be set automatically or a specified

pulse width is set can be selected.

Selection Pulse width setting

1:AUTO Pulse width automatic setting

Automatically set to the settable maximum pulse width according to the set count rate.

2:MANUAL Pulse width manual setting

Pulse width set by pulse width setting

Note: If the total volumetric flow indication or count value indication is used, and the pulse output is not

used, it is recommended that you select the pulse width automatic setting.

6F8A0917

Pulse width

The pulse width for totalizer pulse output is set.

If Automatic setting (1:AUTO) is selected for pulse width mode, it is not necessary to set the pulse

width.

• The pulse width must be set to a value within the range of 0.3ms to 500ms. If you try to set a

value exceeding 500 ms, the value will be forcibly changed to 500ms.

• The pulse width must be set to 40% or less of the pulse period at 100% output. If a value

exceeding this limit is tried to set, regardless of the range described above, an error message

* H. OVER SPEC

appears and the value returns to the previously set value. Try to set a new value again.

If the pulse width is set to 0, it will be automatically set to 40% of the pulse period at 100% output.

However, if the calculation result exceeds 100ms, it will be forcibly set to 100ms.

Example 1 In the case of the following:

Range: 3,600m3/h (1m3/s)

Count rate: 0.001m3

Since the count rate is 3,600 m3/h ÷ 0.001(m3) = 3,600,000 pulses/h (1000 pulses/s),

the full-scale period is 1s ÷ 1000 = 1ms.

Therefore, the pulse width can only be set to 1ms x 0.4 = 0.4ms.

Example 2 In the case of the following:

Rage: 3,600m3/h (1m3/s)

Count rate: 1000m3

Since the pulse count is 3,600m3/h ÷ 1000m3 = 3.6 pulses/h (0.001 pulse/s), the

full-scale period is 1s ÷ 0.001 = 1000s.

Therefore, the pulse width becomes 1000s × 0.4 = 400s. However, since the maximum

value is 500ms, the pulse width becomes 500ms.

Example 3 In the case of the following:

Rage: 3,600m3/h (1m3/s)

Count rate: 1m3

Pulse width is set to 0ms

Since the pulse count is 3,600m3/h ÷ 1m3 = 3600 pulses/h (1 pulse/s), the full-scale

period is 1s ÷ 1 = 1s.

Therefore, the pulse width becomes 1s × 0.4 = 400ms. However, in the case of

automatic setting, since the maximum value is 100ms, the pulse width becomes

100ms.

6F8A0917

Checking the count rate and pulse width

How to check the count rate setting is shown below.

To check other setting values, select the following function numbers:

Pulse width mode H2: PLS MODE

Pulse width H3: PLS WIDTH

Switch operation Display example Description

H1: COUNT RATE

1.00000 m3

Select H1: COUNT RATE from the setting item selection

menu.

The currently set count rate appears.

H1: COUNT RATE Returns to the menu of setting item selection.

Changing the count rate

The following is an example to change the count rate from 0.01m3 to 200 l (liter).

Switch operation Display example Description

H1: COUNT RATE

1.00000 m3

Select H1: COUNT RATE from the setting item selection

menu.

The currently set count rate appears.

H1: COUNT RATE

1.00000 m3

The cursor appears.

Press further to move the cursor to the digit of unit.

H1: COUNT RATE

1000.00 l

↓

200.000 l

Change the unit to l.

Then press to move the cursor to the desired digit to change

and change the number there. Repeat this operation until 200 l

appears on the display.

H1: COUNT RATE

200.000 l

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the set

value is displayed.

H1: COUNT RATE Returns to the menu of setting item selection.

Note: The indicting units for count rate are displayed cyclically as shown below.

3 ml

l gal bbl pt qt

6F8A0917

Changing the pulse width mode setting

The following is an example to change the pulse width mode setting from 2:MANUAL to 1:AUTO.

Switch operation Display example Description

H2: PLS MODE

2:MANUAL

Select H2: PLS MODE from the setting item selection menu.

The currently set pulse width mode setting appears.

H2: PLS MODE

2:MANUAL The cursor appears.

H2: PLS MODE

1:AUTO Press to select 1:AUTO.

H2: PLS MODE

1:AUTO

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the set

value is displayed.

H2: PLS MODE Returns to the menu of setting item selection.

6F8A0917

Changing the pulse width

The following is an example to change the pulse width from 100ms to 250ms.

Switch operation Display example Description

H3: PLS WIDTH

100.0 ms

Select H3: PLS WIDTH from the setting item selection menu.

The currently set pulse width appears.

H3: PLS WIDTH

100.0 ms

The cursor appears.

Press further to move the cursor to the desired digit to

change.

H3: PLS WIDTH

200.0 ms

↓

250.0 ms

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

H3: PLS WIDTH

250.0 ms

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the set

value is displayed.

H3: PLS WIDTH Returns to the menu of setting item selection.

Note: If you try to set a value exceeding the settable range, *H. OVER SPEC. appears and the value returns to

the previously set value. Try to set a new value again.

6F8A0917

8.2.16 Preset Counter

Preset counter is the function to output a signal through DO when the totalized count reaches a preset

value.

For details of preset counter function, also see 10. “Function Description.”

The following parameters can be set here:

(1) Preset count value

(2) Preset output function

Notes

• Preset counter works only for forward direction flow count.

• To use the preset counter, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.”

• To use the preset counter, it is recommended that you set a total volumetric flow unit or a count

value unit as indicating unit to check the operating condition.

For how to set the indicating unit, see 8.2.6 “Normal Indicating Unit.”

Preset count value

Preset value for preset counter is set.

Preset count value can be set within the range of 0 to 99999999.

Preset output function

The operation of DO output when the preset counter reaches the preset value can be selected. You

can select the operation of DO output from the items shown in the table below:

PRESET FUNCT. Preset output function

1: HOLD Output level is held

2: 50ms PULSE One-shot pulse output of 50ms pulse width

3: 500ms PULSE One-shot pulse output of 500ms pulse width

Note: If the preset output function is set to “50ms PULSE” or “500ms PULSE,”

select the preset count value to become 1, 2, 5, 25 or 125 × 10n. (If a value

not satisfying this condition is set, the preset output timing may be shifted

when the totalizer overflows.)

6F8A0917

Checking the preset counter setting

How to check the preset count value is shown below.

To check the preset output function, select the function “I2: PRESET FNC.”

Switch operation Display example Description

I1: PRESET CNT

00000300

Select H1:PRESET from the setting item select menu.

The currently set preset count value appears.

I1: PRESET CNT Returns to the menu of preset item selection.

Changing the preset count value

The following is an example to show how to change the preset value from 500 (count) to 1000

(count)

Switch operation Display example Description

I1: PRESET

00000500

Select I1:PRESET from the setting item selection menu.

The currently set preset count value (500 counts in this

example) appears.

I1: PRESET

00000500

The cursor appears.

Press further to move the cursor to the desire digit to

change.

I1: PRESET

00001500

00001000

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there

I1: PRESET

00001000

The display blinks and the set value is displayed for

confirmation

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition the setting

value is displayed.

I1: PRESET Returns to the menu of setting item selection.

6F8A0917

100

Changing the preset output function

The following is an example to show how to change the preset output function from Output state

hold (1/HOLD) to One-shot pulse output (2:50ms PULSE).

Switch operation Display example Description

I2: PRESET FNC

1:HOLD

Select I2:PRESET FNC from the setting item selection menu.

The currently set preset count output function (HOLD in this

example) appears.

I2: PRESET FNC

1:HOLD The cursor appears.

I2: PRESET FNC

2:50ms PULSE Press to select the setting code 1:50ms PULSE.

I2: PRESET FNC

2:50ms PULSE

The display blinks and the set value is displayed for

confirmation

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

I2: PRESET FNC Returns to the menu of setting item selection.

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8.2.17 Flow Rate High/Low limit Alarm

The flow rate high/low limit alarm is the function to generate an alarm when the instantaneous flow

rate exceeds a preset high limit value (or low limit value).

When an alarm is generated, an alarm message is displayed and a signal can be output through DO.

Two outputs are provided each for high limit value and low limit value (4 outputs in total of high limit,

high-high limit, low limit and low-low limit) and an alarm output can be sent out separately.

The following parameters can be set here:

(1) High limit alarm On/Off

(2) High limit value

(3) Low limit alarm On/Off

(4) Low limit value

(5) High-high limit alarm On/Off

(6) High-high limit value

(7) Low-low limit alarm value On/Off

(8) Low-low limit value

Note

• To output a high/low limit alarm through DO, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.”

High/low limit alarm On/Off

Whether the high/low limit alarm is used or not can be selected

Selection Alarm operation

1: ON Alarm function provided

If the flow rate exceeds a selected high limit value (or low limit value),

an alarm is generated.

2: OFF Alarm function not provided

The selected alarm will not be generated.

High/low limit value

A flow rate value (high/low limit value) to generate an alarm is set in percent of the maximum

range (Range 1) flow rate value.

The high/low limit alarm value can be set within the range of −10% to 110% in increments of 0.5%.

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Checking the high/low limit alarm setting

Proceed as follows to check the high/low limit alarm setting.

The following is how to check whether the high limit alarm is provided (On) or not (Off).

To check other setting values, select the following function numbers:

High limit value J2: H ALM VAL

Low limit alarm On/Off J3: L ALM SET

Low limit value J4: L ALM VAL

High-high limit alarm On/Off K1: HH ALM SET

High-high limit alarm K2: HH ALM VAL

Low-low limit alarm On/Off K3: LL ALM SET

Low-low limit value K4: LL ALM VAL

Switch operation Display example Description

J1: H ALM SET

1:ON

Select J1: H ALM SET from the setting item selection menu.

The currently set high limit alarm On/Off setting appears.

J1: H ALM SET Returns to the menu of setting item selection.

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Changing the high/low limit alarm On/Off

The following is an example to change the high limit alarm setting from OFF to ON.

To change other high/low limit alarm On/Off setting, select the following functions.

High limit alarm On/Off J1: H ALM SET

Low limit alarm On/Off J3: L ALM SET

High-high limit alarm On/Off K1: HH ALM SET

Low-low limit alarm On/Off K3: LL ALM SET

Switch operation Display example Description

J1: H ALM SET

2:OFF

Select J1: H ALM SET from the setting item selection menu.

The currently set On/Off setting for high limit alarm appears.

J1: H ALM SET

2:OFF The cursor appears.

J1: H ALM SET

1:ON Change the setting.

J1: H ALM SET

1:ON

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

J1: H ALM SET Returns to the menu of setting item selection

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Changing the high/low limit value

The following is an example to change the high limit value from +105% to +103%.

To change other high/low limit value setting, select the following functions.

Low limit value J4: L ALM SET

High-high limit value K2: HH ALM SET

Low-low limit value K4: LL ALM SET

Switch operation Display example Description

J2: H ALM VAL

+105.0%

Select J2: H ALM VAL from the setting item selection menu.

The currently set high limit alarm value appears.

J2: H ALM VAL

+105.0%

The cursor appears.

Press further to move the cursor to the digit to change.

J2: H ALM VAL

+103.0%

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

J2: H ALM VAL

+103.0%

The display blinks and the set value is displayed for

conformation

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

J2: H ALM VAL Returns to the menu of setting item selection.

Note: If a value of 10% or less, or a value of 110% or more is tried to set, *L. Over SPEC. or *H. OVER SPEC.

appears and the value returns to the previously set value.

Try to set a new value again.

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8.2.18 Fluid Empty Alarm

Fluid empty alarm is the function to generate an alarm when a condition is detected in which fluid is

not filled or water level is not enough in the measuring pipe of the flowmeter.

If an alarm is generated, an alarm message is displayed and a signal can be output through DO.

Note

• To output a fluid empty alarm through DO, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.”

•In the case of LF232*F; Fluid empty alarm function is not usable. Set this function 'OFF'.

Setting the fluid empty alarm

Whether the fluid empty alarm should be used or not, and its detection sensitivity can be selected.

EMPTY Fluid empty alarm setting

1: OFF Fluid empty alarm not used

Fluid empty condition is not detected.

2: NORMAL Sensitivity: Standard

Detection sensitivity is set to the standard level.

3: SENSITIVE Sensitivity: High

Detection sensitivity is set to high sensitivity level.

4: SENSITIVE-H

Fluid empty alarm used

If a fluid empty condition is

detected, an alarm will be

output.

Sensitivity: Higher

Detection sensitivity is set to higher sensitivity

level.

* To use the fluid empty alarm, normally select 2:NORMAL (standard detection sensitivity). Select

3:SENSITVE or 4:SENSITIVE-H only when the fluid empty alarm is difficult to detect due to the condition

of the fluid to be measured or its piping condition.

Checking the fluid empty alarm On/Off setting

Proceed as follows to check whether the fluid empty alarm is used (On) or not (Off).

Switch operation Display example Description

L1: EMPTY ALM

1:NORMAL

Select L1:EMPTY ALM from the setting item selection menu.

The currently set fluid empty alarm On/Off setting appears.

L1: EMPTY ALM Returns to the menu of setting item selection.

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Changing the fluid empty alarm On/Off setting.

The following is an example to change the fluid empty alarm setting from Alarm On (1:NORMAL)

to Alarm Off (0:OFF).

Switch operation Display example Description

L1: EMPTY ALM

1:NORMAL

Select L1:EMPTY ALM from the setting item selection menu.

Then the fluid empty alarm On/Off setting appears.

L1: EMPTY ALM

1:NORMAL The cursor appears.

L1: EMPTY ALM

2:OFF Press to select the fluid empty alarm Off

L1: EMPTY ALM

2:OFF

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

L1: EMPTY ALM Returns to the menu of setting item selection.

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8.2.19 Self-Diagnosis Function

Self-diagnosis function is the function to generate an alarm if an error is found from the result of

diagnosis of internal circuits, memory, etc.

If an alarm is generated, an alarm message is displayed and a signal can be output through DO.

The following parameters can be set here:

(1) Self-diagnosis alarm On/Off

(2) DO alarm output factor setting

NOTE

• To output a self-diagnosis alarm through DO, it is necessary to set the DO function for output.

For how to set the DO function, see 8.2.14 “Digital I/O Function.”

Self-diagnosis function On/Off setting

Whether or not to use the self-diagnosis function can be selected.

Selection Self-diagnosis alarm is used or not

1: ON Self-diagnosis function is used

An alarm is generated if an error is detected.

2: OFF Self-diagnosis function is not used

Self-diagnosis will not be carried out.

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Alarm output factor setting

When the diagnosis alarm is output through DO, whether a fluid empty alarm should be added to

the condition for alarm output can be selected.

Selection Diagnosis error alarm factor

1: WITHOUT EMP Fluid empty alarm is not included

2: WITH EMP Fluid empty alarm is included

List of alarm output factors

Diagnosis error items to output as a diagnosis alarm through DO are shown below.

Diagnosis alarm output (DO)

Diagnosis error item

WITHOUT EMP WITH EMP

RAM error

ROM error

Exciting current value error

Exciting circuit wire broken

ADC error (flow measurement circuit error)

Parameter error

Fluid empty alarm

−

: Diagnosis alarm is output through DO when an error is detected.

− : Diagnosis alarm is not output through DO even if an error is detected.

(However, an error message is displayed)

Checking the self-diagnosis alarm setting

Proceed as follows to check the self-diagnosis function setting.

The following is how to check whether the self-diagnosis alarm is used (On) or not (Off).

To check the alarm output factors, select the function “L3: ALM PRESET.”

Switch operation Display example Description

L2: SELF CHECK

1:ON

Select L2: SELF CHECK from the setting item selection menu.

Whether the self-diagnosis alarm is used (On) or not (Off)

appears.

L2: SELF CHECK Returns to the menu of setting item selection.

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Changing the self-diagnosis function setting

The following is an example to change the self-diagnosis function from Self-diagnosis function On

(1:ON) to Self-diagnosis function Off (2:OFF).

To change the setting for alarm output factors, select the function “L3: ALM PRESET.”

Switch operation Display example Description

L2: SELF CHECK

1:ON

Select L2: SELF CHEK from the setting item selection menu.

Whether the self-diagnosis function is used (On) or not (Off)

appears.

L2: SELF CHECK

1:ON The cursor appears.

L2: SELF CHECK

2:OFF Press to set the self-diagnosis function to OFF.

L2: SELF CHECK

2:OFF

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

L2: SELF CHECK Returns to the menu of setting item selection.

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8.2.20 Rate-of-Change Limit Value and Control Time

The rate-of-change limit is the function to prevent a sudden change in flow indication of the converter

when the measurement flow signal contains excessive noise.

Damping constant is also effective to prevent indication variations by increasing its value but the rate

of change limit control is effective against a sudden change in flow indication that the damping

constant cannot eliminate.

The following parameters can be set here:

(1) Rate-of-change limit value

(2) Rate-of-change control time

Note: To use the rate-of-change limit function, it is necessary to set both (1) and (2).

If either one is set to zero (factory setting value), this function does not work

When not using the rate-of-change limit function, set zero to either one of these items.

Rate-of-change limit value

Indication change is controlled within the limit value* against variations of measurement flow

signals.

* Indication variation per approx. 40ms will be controlled to within the limit value (in percent of

span).

The rate-of-change limit value can be set within the range of 0 to 30% in increments of 0.1%.

In the case of multi-range setting, the value is indicated in percent of the range in operation.

If 0 is set, the rate-of-change limit function does not work.

Rate-of-change control time

If the time used to control the indication against variations of measurement flow signal exceeds the

control time, the rate-of-change control will be turned off. (Flow indication will be output directly

without the rate-of-change limit function.)

Control time can be set within the range of 0 to 20s in increments of 1s.

If 0 is set, the rate-of-change limit function does not work.

Checking the rate-of-change limit setting

Proceed as follows to check the rate-of-change limit setting.

How to check the limit value is shown below.

To check the control time, select the function “M2: LIMIT TIME.”

Switch operation Display example Description

M1: LIMIT RATE

05.0 %

Select M1: LIMIT RATE from the setting item selection menu.

The currently set rate-of-change limit value appears.

M1: LIMIT RATE Returns to the menu of setting item selection.

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Changing the rate-of-change limit setting

The following is an example to change the limit value from 1.0% to 1.5%.

To change the control time, select the function “M2: LIMIT TIME.”

Switch operation Display example Description

M1: LIMIT RATE

1.0 %

Select M1: LIMIT RATE from the setting item selection menu.

The currently set rate-of change limit value appears.

M1: LIMIT RATE

1.0%

The cursor appears.

Press further to move the cursor to the desired digit to

change.

M1: LIMIT RATE

1.5 %

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

M1: LIMIT RATE

1.5 %

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

M1: LIMIT RATE Returns to the menu of setting item selection.

Note: If a value outside of the settable range is tried to set, *H. OVER SPEC. appears and the value returns to

the previously set value. Try to set a new value again.

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8.3 Initial Settings When Shipped from the Factory

Initial settings used when shipped from the factory unless otherwise specified are shown below.

No. Parameter name Initial setting values

A1 Exciting current Adjusted value when shipped from the factory

(described on the detector nameplate)

A2 Meter size Specified meter size when ordered

(described in the Test Record)

A3 Exciting frequency Recommended value for the detector combined

(See 8.2.3 “Exciting Frequency.”)

A4 Flow direction NORMAL

A5 Password 000

B1 Indicating unit setting (main unit) m3/h (If any range is specified, the same unit as that of

the range)

B2 Indicating unit setting (sub display) % (If count rate is specified, the same unit as that of the

count rate)

B3 Custom coefficient 0

B4 Custom unit “ ” (7 blank spaces)

C1 Range type Range type specified when ordered

(If multi-range is not specified, Single range is set)

C2 to 4 Ranges 1 to 4 Values specified when ordered (described in the Test

Record. If not specified, Range 1 is the Toshiba

standard range and Ranges 2 to 4 are zeros)

C5 Hysteresis 3.0 %

Range of 1m/s or more 1.0s

Meter size

16”(400mm) or less Range of less than 1m/s

Meter size 20” (500mm) or more 3.0s

D1 Damping factor

For partially filled pipes detectors 10s

D2 Low cutoff value 1.0 %

D3 Output when an alarm occurs 4mA output

OFF D4 Display low cut

For partially filled pipes detectors: ON

D5 Output low limit setting 4mA

F1 Digital Output 1 PULSE OUT (Pulse Output)

F2 to 4 Digital Outputs 2 to 4 NO USE (Not used)

F5 to 8 Digital Output 1 to 4 states NORMAL OPEN

G1 to 2 Digital Inputs 1 to 2 NO USE (Not used)

G3 to 4 Digital inputs 1 to 2 detection levels H LEVEL

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No. Parameter name Initial setting values

H1 Count rate Meter size 1/10" to 1/4" (2.5 to 6 mm) 1L

Meter size 1/2" to 1 1/2” (15 to 40 mm) 0.01m3

Meter size 2" to 4” (50 to 100mm) 0.1m3

Meter size 6” to 24” (150 to 600mm) 1m3

Meter size 28” to 120” (700 to 3000mm) 10m3

H2 Pulse width setting mode AUTO

H3 Pulse width 100 ms

I1 Preset count value 00000000

I2 Preset output function HOLD

J1 High limit alarm setting OFF

J2 High limit alarm value 0.0 %

J3 Low limit alarm setting OFF

J4 Low limit alarm value 0.0 %

K1 High-high limit alarm setting OFF

K2 High-high limit alarm value 0.0 %

K3 Low-low limit alarm setting OFF

K4 Low-low limit alarm value 0.0 %

L1 Fluid empty alarm ON Detection level: NORMAL

(In the case of LF232*F; OFF)

L2 Self-diagnosis function ON

L3 Alarm output factor setting WITHOUT EMP (fluid empty alarm not included)

0.0 % M1 Rate-of-change limit

For partially filled pipes detectors: 10 %

0 s M2 Control time

For partially filled pipes detectors: 10 s

N1 Fixed value output function OFF

O1 Zero offset 0.0 %

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8.4 Fixed Value Output (Loop Check)

The fixed value output is the function to output a fixed current and/or a fixed pulse output

independently of the flow rate signal.

The following parameters can be set here:

(1) Fixed value output On/Off setting

(2) Fixed current output value

(3) Fixed pulse output value

Notes

• Fixed pulse output can be sent out only when DO1 or DO2 is set for pulse output.

• When the mode is switched to the fixed output mode by DI function, the preset values of items (2)

and (3) above will be output.

• In the fixed output mode, the condition of DO output (other than pulse output) will be

maintained.

Fixed value output On/Off setting

Fixed output mode can be selected by the setting as follows.

Selection Mode

1: ON Fixed value output mode On

Current output and pulse output become fixed output values.

2: OFF Fixed value output mode Off

Fixed output mode will be turned off and the mode goes to the

normal measurement mode.

When the fixed value output is set to ON, the main indicating unit only is displayed and the current

output set value is displayed in the lower line in the measurement mode.

Display example:

1.000 m/s

* FIX.OUT 20.0 mA

Flow velocity is displayed in main

indicating unit

Fixed current value is displayed

Note: When power is turned off and on again, the fixed output On/Off setting will be turned off.

Fixed current output value

The current value used in the fixed output mode is set.

Fixed current output value can be set in the range of 3 to 24mA in increments of 0.1mA.

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Fixed pulse output value

The pulse frequency is set, which is used to output in the fixed output mode through the DO

terminal where the pulse output function is set.

The fixed pulse output value can be set within the range of 0 to 1000pps in increments of 1pps.

Note: When the pulse output is sent out from DO2 terminal, up to 100pps can be output.

Checking the fixed output function setting

Proceed as follows to check the fixed output function.

How to check the fixed value out On/Off setting is shown here.

To check other settings, select the following functions:

Fixed current output value N2: FIX CURR

Fixed pulse output value N3: FIX PULSE

Switch operation Display example Description

N1: FIXED OUT

1:ON

Select N1: FIXED OUT from the setting item selection menu.

The currently set fixed value output On/Off setting appears.

N1: FIXED OUT Returns to the menu of setting item selection.

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Changing the fixed output function

The following is an example to change the fixed output function from Fixed value output OFF to

ON and then go on to set the current output value and the pulse output value. To change the current

output value or pulse output value independently, select the following function:

Fixed current output value N2: FIX CURR

Fixed pulse output value N3: FIX PULSE

Switch operation Display example Description

N1: FIXED OUT

2:OFF

Select N1: FIXED OUT from the setting item selection menu.

The currently set fixed value output On/Off setting appears.

N1: FIXED OUT

2:OFF The cursor appears.

N1: FIXED OUT

1:ON Select the fixed value output: ON.

N2: FIX. CURR.

10.0 mA

The display blinks and the set value is displayed for

conformation.

Press MENU/ENT again to write the data. The cursor

disappears and then the current output set value can be

changed.

N2: FIX. CURR.

10.0 mA Move the cursor to the desired digit to change.

N2: FIX. CURR.

20.0 mA

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to the desired digit and change the number there.

N3: FIX. PULSE

100 PPS

The display blinks and the set value is displayed for

conformation.

Press MENU/ENT again to write the data. The cursor

disappears and then the pulse output set value can be changed.

N3: FIX. PULSE

100 PPS

The display blinks and the set value is displayed for

conformation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

N3: FIX. PULSE Returns to the menu of setting item selection.

Note. If a value outside of the settable range is tried to set, the upper limit or lower limit value of the settable

range will be forcibly set.

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Changing the fixed output constant

The following is an example to change the fixed pulse output value from 50pps to 100pps. To

change the fixed current output value, select the function “L2: FIX. CURR.”

Switch operation Display example Description

L3: FIX. PULSE

0050 pps

Select L3: FIX. PULSE from the setting item selection menu.

The currently set fixed pulse output value appears.

L3: FIX. PULSE

0050 pps

The cursor appears.

Press further to move the cursor to the desired digit to

change.

L3: FIX. PULSE

0150 pps

↓

0100 pps

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

L3: FIX. PULSE

0100 pps

The display blinks and the set value is displayed for

confirmation.

Pres MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

L3: FIX. PULSE Returns to the menu of setting item selection.

Note: If you try to set a value outside of the settable range, the value will be forcibly set to the upper limit or the

lower limit of the settable range.

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8.5 Zero Adjustment

8.5.1 Still Water Zero Adjustment

Still water zero adjustment must be performed when the fluid in the measuring pipe of the detector

stays still.

Switch operation Display example Description

−

10.00 m/s

100.0 % Measured value being displayed (measurement mode)

ENTER111

000

Pressing MENU/ENT in the measurement mode for 3 seconds

or more, the screen moves to the menu lock cancellation

screen.

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

ENTER111

111

Set the menu lock cancellation cord [111] by

pressing and .

* Pressing CANCEL in the mode selection screen, the mode

returns to the measurement mode.

>1:SET

2:CNT CTRL

Press MENU/ENT for 3 seconds or more in the measurement

mode and then the mode changes to the mode selection screen.

A1:EX CURRENT Select 1:SET in the mode selection screen and then the menu

screen appears.

E1: ZERO ADJUST Press and so that the function number becomes E1:

ZERO ADJUST.

E1: ZERO ADJUST

01.0%

The current flow rate measured value in % unit appears.

(Check that the fluid to be measured stays still.)

ADJUST READY

01.0%

ADJUST READY appears and the system is ready for

adjustment. (If “CANCEL” is pressed, Adjustment ready

condition will be cancelled.)

E1: ZERO ADJUST

* ZERO ADJUST

About 3 to 6 seconds later, the still water zero adjustment ends

and the measured flow value after adjustment appears.

−

E1: ZERO ADJUST

00.0% Returns to the menu of setting item selection.

E1: ZERO ADJUST Press and so that the number digit of the function

number becomes 0.

Note2

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E0: MEAS MODE Returns to the measurement mode (measured value display

screen).

10.00 m/s

100.0 %

Note1: If the flow rate value is outside of the range of ±1.25

m/s, the adjustment result will not be reflected on the flow rate

measured value.

Note1:If the flow rate value is outside of the range of ±1.25 m/s, the adjustment result will not be reflected on

the flow rate measured value.

Note2: There is not this screen to the converter before serial No.072320999.

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8.5.2 Zero Offset Adjustment

This function is used to perform zero adjustment simply by comparing the output of the flowmeter

with other process value without stopping the process flow.

If zero adjustment can be performed with still water condition, it is not necessary to set this adjustment

value.

How to calculate the zero offset value

Zero offset is performed by setting the adjustment value.

The adjustment value can be obtained by the following equation:

Adjustment value (%) = {(Actual flow rate) − (LF232 measured value)}

* Calculate the value in percent of the setting range of Range 1.

(See the example below.)

(Example)

Flow rate Value in percent of the set span

Actual flow rate obtained from

other process value 10.0 m3/min 50.0 %

LF232 measured value 10.5 m3/min 52.5 %

Zero offset adjustment value −2.5 %

(If zero offset adjustment value is set to −2.5 %, the output of LF232 is shifted by

−2.5% and 50.0 % output can be obtained.)

The zero offset adjustment value can be set within the range of ±0.410ft/s (0.125 m/s) (±1.25% of

the maximum range 32.8ft/s (10 m/s))

Note: If you perform still water zero adjustment, zero offset adjustment value becomes zero.

Checking the zero offset adjustment value

Proceed as follows to check the zero offset adjustment value.

Switch operation Display example Description

O1: MANUAL ZERO

+002.5 %

Select O1: MANUAL ZERO from the setting item selection

menu.

The currently set zero offset adjustment value appears.

O1: MANUAL ZERO Returns to the menu of setting item selection.

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Changing the zero offset adjustment value

Changing the zero offset adjustment value from +1.0% to −2.5%.

Switch operation Display example Description

O1: MANUAL ZERO

+001.0%

Select O1: MANUAL ZERO from the setting item selection menu.

The currently set zero offset adjustment value appears.

O1: MANUAL ZERO

+001.0%

The cursor appears.

Press further to change the cursor to the desired digit to

change.

O1: MANUAL ZERO

-001.0%

↓

-002.5%

Change the number of the digit.

To change other digit, press under this condition to move

the cursor to that digit and change the number there.

O1: MANUAL ZERO

-002.5%

The display blinks and the set value is displayed for

confirmation.

Press MENU/ENT again to write the data. Then the cursor

disappears and the display returns to the condition that the

setting value is displayed.

O1: MANUAL ZERO Returns to the menu of setting item selection.

Note: If you try to set a value outside of the settable range, an error message of *H. OVER SPEC or *L. OVER

SPEC appears. Try to set a new value again.

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9. Mag-Prover Calibration

9.1 Calibration Items

The calibration mode of the LF232 flowmeter converter is used to check or perform zero and span

calibration of the converter and check the exciting current. To change the mode to the calibration mode,

select the setting item in accordance with the procedure in 7.3.2 “Setting Mode Operation.”

The procedure on the following pages is used to check or perform zero and span calibration of the

converter and check the exciting current.

However, these values are already checked and calibrated when shipped from the factory. Do not

change these settings unless it is necessary to calibrate in the field, etc.

No. Setting item Display example

9.2.1 0 % flow rate calibration P1:FLOW CAL 0 0.0 %

9.2.2 50 % flow rate calibration P2:FLOW CAL 50 50.0 %

9.2.3 100 % flow rate calibration P3:FLOW CAL100 100.0 %

9.2.4 Checking the exciting current

output value P4:EX CURR DSP 0.2100 A

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9.2 Converter Check / Calibration

9.2.1 0% Flow Rate Calibration (Zero Calibration)

Using Mag-Prover internal calibration circuit, 0% flow rate (hereafter called zero point) calibration

can be performed.

Checking the zero point

Switch operation Display example Description

P1:FLOW CAL 0

0.0 %

Select P1:FLOW CAL 0 from the calibration item selection

menu.

Zero point using the simulation input appears.

P1:FLOW CAL 0 Returns to the menu of calibration item selection.

Calibrating the zero point

Switch operation Display example Description

P1:FLOW CAL 0

0.1 %

Select P1:FLOW CAL 0 from the calibration item selection

menu.

Zero point using the simulation input appears.

ADJUST READY

0.1 %

Press . Then the display shown left appears and the system

is ready for zero calibration. (Note 1)

P1:FLOW CAL 0%

* CAL. 0% ADJ. The display shown left appears and zero calibration starts.

−

P1:FLOW CAL 0

0.0 %

About 3 to 6 seconds later (Note 2), the zero calibration ends

and a new zero point appears.

P1:FLOW CAL 0% Returns to the menu of calibration item selection.

Note 1: To cancel the adjustment from the condition of ADJUST READY, press CANCEL . The display returns

to the condition where zero point using the simulation input is displayed.

Note 2: Calibration time differs depending on the exciting frequency.

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9.2.2 50% Flow Rate Calibration

50% flow rate value can be checked only.

Checking the 50% flow rate value

Switch operation Display example Description

P2:FLOW SIG 50

50.1 %

Select P2:FLOW SIG 50 from the calibration item selection

menu.

50% flow rate value using the simulation input appears.

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9.2.3 100% Flow Rate Calibration (Span Calibration)

Using the Mag-Prover internal calibration circuit, 100% flow rate value (hereafter called the span

value) calibration can be performed.

Checking the span value

Switch operation Display example Description

P3:FLOW CAL100

100.1 %

Select P3:FLOW CAL 100 from the calibration item selection

menu.

Span value using the simulation input appears.

P3:FLOW CAL100 Returns to the menu of calibration item selection.

Calibrating the span value

Switch operation Display example Description

P3:FLOW CAL100%

100.1 %

Select P3:FLOW CAL 100 from the calibration item selection

menu.

Span value using the simulation input appears.

ADJUST READY

100.1 %

Press . Then the display shown left appears and the system

is ready for span calibration. (Note 1)

P3:FLOW CAL100

* CAL. 100% ADJ. The display shown left appears and the span calibration starts.

−

P3:FLOW SCAL100

100.0 %

About 3 to 6 seconds later (Note 2), the span calibration ends

and a new span value appears.

P3:FLOW CAL100 Returns to the menu of calibration item selection.

Note 1: To cancel the adjustment from the condition of ADJUST READY, press CANCEL . The display returns

to the condition where 100% flow rate value using the simulation input is displayed.

Note 2: Calibration time differs depending on the exciting frequency.

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9.2.4 Checking the Exciting Current Value

The monitor value of the exciting current can be checked.

Checking the exciting current value

Switch operation Display example Description

P4:EX CURR DSP

0.2100 A

Select P4:EX CURR DSP from the calibration item selection

menu.

Span value using the simulation input appears.

P4:EX CURR DSP Returns to the menu of calibration item selection.

* The exciting current value is adjusted when shipped from the factory. Contact your nearest Toshiba

representative if any change is necessary.

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10. Function Description

The LF232 flowmeter converter is equipped with 4 digital outputs and 2 digital inputs (1 digital output

as standard), enabling you to use these as various functions such as pulse output and alarm outputs.

Digital I/O functions are described below.

Functions Description

Flow totalization Totalizes flow volume in volumetric unit.

For totalized flow, a pulse output per each unit of flow volume can be

sent out.

The operation to start, stop and reset the totalizer and pulse output can

be controlled with Digital Input.

Multiple ranges Measuring ranges can be switched in accordance with flow rate.

Measuring ranges can be switched automatically or by control using

Digital Inputs.

Forward and reverse ranges Forward and reverse direction flows can be measured.

Forward and reverse ranges can be combined with multiple ranges.

Flow rate High/Low limit

(High-high limit/Low-low limit)

alarms

If the flow rate exceeds or lowers below the preset value, an alarm will

be output.

2 high limit alarm outputs and 2 low limit alarm outputs, 4 alarm

outputs in total, can be sent out.

Fluid empty alarm If the fluid to be measured flows out from the measuring pipe of the

detector, an alarm is output.

(In the case of LF232*F, fluid empty alarm function is not usable.)

Preset counter If the count of the totalizer exceeds the preset value, a signal is output.

Remote still water zero adjustment Still water zero adjustment can be controlled using Digital Inputs.

Fixed value output (loop output) Fixed value for current output and pulse output can be sent out to

perform a loop check for output lines.

The fixed value output mode can also be switched by control using

Digital Inputs.

Converter error alarm If an error is detected such as memory error or excitation circuit error,

an alarm is output.

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10.1 Digital I/O Specifications

The specifications of the digital I/O terminals of the LF232 converter are as follows:

Digital Outputs:

(DO1) Output type Transistor open collector (standard)

Number of outputs 1

Capacity 30 VDC, 200 mA maximum

(DO2 to DO4) Output type Solid-state contact output (non polarity) (option)

Number of outputs 3

Capacity 150 VDC, 150 mA maximum

150 VAC (peal value), 100 mA maximum

Digital Input (option):

(DI1, DI2) Signal type Voltage signal of 20 to 30 VDC

• High input level: 20 to 30 VDC

• Low input level: 2 VDC maximum

Input resistance Approx. 2.7 kΩ

Number of inputs 2

• Each terminal can be set to select each function.

• Terminal “CO2” is the common terminal of DO2 to DO4 and “CI” is the common terminal of DI1

and DI2.

• Each terminal is isolated from internal circuit.

(Output terminals are not isolated between them.)

• In the case of the standard specification (without digital I/O specification), a solid-state contact,

photo-coupler and resistor are not provided internally.

Contact output 2 (DO2 to DO4)

Contact output 1 (DO1)

CI DI1, DI2 DO2 to

DO4 DO1CO2CO1

Photo-coupler (option)

Resistor

(option)

Converter inside

Voltage input

Solid-state contact

(option)

Transistor open collector

(standard)

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10.2 Totalizer and Pulse Output

Proceed as follows to use the totalizer and pulse output.

Count Rate and Pulse Width Settings

Follow the procedure in 8.2.15 “Count Rate (Pulse Rate) and Pulse Width” and set

the flow rate per 1 count (1 pulse) (count rate), pulse width mode and pulse width.

* Count rate can be set within the range of 3.6 to 3,600,000 pulses/h (1/1000 to

1000 pulses/s) with respect to the set range. (Note 2)

* Pulse width will be set automatically if the pulse width mode is set to AUTO.

If you want to set the pulse width manually, the pulse width can be set between

0.3ms and 500ms. However, the pulse width must be 40% or less of the

full-scale period. (Note 3)

For pulse width, check the acceptable signal width of the receiving instruments

when you set the pulse width.

If the pulse output is not used, pulse width setting is not needed.

DO Setting

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output 1

(DO1) or Digital Output 2 (DO2) for pulse output.

If the pulse output is not used, DO setting is not needed.

DI Setting

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Input

(DI) function.

In the case of the converter without Digital Input (9th digit of the product code is

“1”), set “NO USE” (factory setting).

Indicating Unit Setting

Follow the procedure in 8.2.6 “Normal Indicating Unit” and set a totalization unit

(m3, l, ml, gal, bbl, pt, qt or COUNT) for indicating unit.

If only the pulse output is used, pulse output can be sent out without setting an

indicating unit but it is recommended that you set a totalization unit as indicating

unit to check the operating condition.

Switching to the Measurement Mode

Follow the procedure in 7.3.1 “Mode Switching” and put the mode back to the

measurement mode.

* To be continued to the next page.

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* Continued from the previous page

Clear (reset) the totalizer. (Note1)

Press switch to clear the count.

If you have changed the count rate, clear (reset) the count before you start the

totalizer.

Start the totalizer. (Note1)

• Press to start the totalizer.

Check that “C” is shown on the display indicating that counting is in progress.

Note 1: The LF232 converter has the function to start/stop the totalizing operation or clear the

internal totalizer.

For details of how to operate the totalizer, see 7.3.4 “Totalizer Operation.”

Note 2: Example of count rate setting range

Count rate can be set in the range of minimum value (3,600,000 pulses/h) to maximum

value (3.6 pulses/h) with respect to the set range

Example: When the range is 3,600m3/h (1m3/s), settable count rate is as

follows:

Minimum value: 3,600m3/h ÷ 3,600,000 pulses/h = 0.001m3 = 1 l (liter)

Maximum value: 3,600m3/h ÷ 3.6 pulses/h = 1,000m3

Note 3: Example of pulse width setting range (in the case of manual setting)

Pulse width can be set within the range of 0.3ms to 500ms in increments of 0.1ms.

However, the pulse width must be 40% or less of the full-scale period.

Example 1: In the case of the following:

Range: 3600m3/h (1m3/s)

Count rate: 0.001m3

Since the count rate is 3,600 m3/h ÷ 0.001(m3) = 3,600,000 pulses

h (1000

pulse/s), the full scale period is 1s ÷ 1000 = 1ms.

Therefore, pulse width can only be set to 1ms x 0.4 = 0.4ms.

Example 2: In the case of the following

Range: 3,600m3/h (1m3/s)

Count rate: 1000m3

Since the count rate is 3,600m3/h ÷ 1000m3 = 3.6 pulses/h (0.001 pulse/s),

the full scale period is 1s ÷ 0.001 = 1000s.

Therefore, pulse width becomes 1000s × 0.4 = 400s.

However, since the maximum value is 500ms, pulse width becomes 500ms.

Example 3: In the case of the following

Range: 3,600m3/h (1m3/s)

Count rate: 1m3

Pulse width is set to 0ms

Since the count rate is 3,600m3/h ÷ 1m3 = 3600 pulses/h (1 pulse/s), the

full scale period is 1s ÷ 1 = 1s.

Therefore, pulse width becomes 1s × 0.4 = 400ms.

However, since the maximum value is 100ms, pulse width becomes 100ms.

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Totalizer operation using digital input signals

Totalizer and pulse output can be operated.

Remote operations of the totalizer and pulse output can be performed using the Digital Input signals.

Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Input (DI) functions.

Operation using Digital Input signals (Standard product, Control signal level: High level)

Digital Input function DI input Totalizer, pulse output operation

Low level Stops Totalizer Start/Stop

High level Outputs

High level Clears (resets) the totalizer and stops Totalizer Reset/Start

Low level Outputs

It is possible to reverse the DI control signal levels by setting the digital input control signal levels.

• When high level (1:H LEVEL) is selected: The operation with the signal level is the same as the

standard product shown in the above table.

• When low level (0:L LEVEL) is selected: The operation with the signal level becomes as shown

below.

Operation using Digital Input signals (Control signal level: Low level)

Digital input function DI input Totalizer and pulse output operation

Low level Outputs Totalizer Start/stop

High level Stops

High level Outputs Totalizer Reset/Start

Low level Clears (resets) the totalizer and stops.

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10.3 Multi-Range Functions

Five types of multi-range functions can be set using the Range Type:

Range Typ

(1) Single direction, 4 ranges Internal automatic switching

(2) Forward and reverse directions, 2 ranges Internal automatic switching

(3) Single direction, 2 ranges External signal switching

(4) Forward and reverse directions, 2 ranges External signal switching

(5) Single direction, 4 ranges E xternal signal switching

To use the multi-range function, proceed as follows to set.

Range Setting

• Follow the procedure in 8.2.8 “Span Value (Range)” and set the range in the following

order.

1. Select the Range Type.

2. Set the span for Ranges 1 to 4.

3. Set the hysteresis value.

DO/DI Setting

• Follow the procedure in 8.2.14 “Digital I/O Function” and set the DO for Range output.

• When using the multi-range switching with external signals, set the DO for external

range switching signals.

• Requirements to combine the range signals (No.1 and No.2) to set the DO and DI differ

depending on the Range Type. For details, see the explanations (1) to (5) on the

following pages.

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Output performance when multiple ranges are used

(1) Single direction (internal automatic switching), 4 ranges

20mA

4mA

100

125

Output (%)

Range output No. 1

Range output No. 2

ON OFF ON OFF

ON OFF

Range 4 Range 3 Range 2

Range 1

Hysteresis

(0 to 25%)

Reverse direction Forward direction Flow rate

• Current output is 4mA as standard when fluid flows in reverse direction.

When the low cutoff function is not used (low cutoff setting is 0), it is possible to output the

current output signal in linear scale up to 3.2mA or 2.4mA when fluid flows in reverse direction.

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(2) Forward and reverse directions (internal automatic switching), 2 ranges

Output when switched from Reverse to

Forward direction

Output when switched from Forward to Reverse

direction

OFFON

Range output

No. 2

Reverse direction Flow rate

4mA

Output

Forward

direction

Low cutoff

1.25

Low

cutoff

From reverse direction range to

forward direction range

(Low cutoff 1.25)

4mA

OFFON

Range output

No. 2

Reverse

direction

Forward

direction

Flow rate

Output

Low cutoff

1.25

Low cutoff

From forward direction range to

reverse direction range

(Low cutoff 1.25)

20m

100

125

Output (%)

Range 4

Range 3

Range 2

Range 1

Range output No. 1

Range output No. 2

OFF ON ON OFF

ON OFF

Reverse direction Flow rate

Forward direction

Hysteresis

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(3) Single direction (external signal switching), 2 ranges

125

100

4mA

Output (%)

Range 2 Range 1

ON OFF

Reverse direction Flow rate

Forward direction

(Range output No. 1)

H level inputExternal range switching signal L level input

• Current output is 4mA as standard when fluid flows in reverse direction.

When the low cutoff function is not used (low cutoff setting is 0), it is possible to output the

current output signal in linear scale up to 3.2mA or 2.4mA when fluid flows in reverse direction.

• Works even if the range output is not used.

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(4) Forward and reverse directions (external signal switching), 2 ranges

4mA

100

125

Output (%)

Range 2 Range 1

Reverse direction Flow rate

Forward direction

Range 3 Range 4

ON OFF(Range output No. 1)

H level inputExternal range switching signal L level input

(Range output No. 2)

H level inputL level input

ON OFF

ONOFF

• Works even if the range output is not used.

Output when switched from Reverse to

Forward direction

Output when switched from Forward to Reverse

direction

OFFON

Range output

No. 2

Reverse direction Flow rate

4mA

Output

Forward

direction

Low cutoff

1.25

Low

cutoff

From reverse direction range to

forward direction range

(Low cutoff 1.25)

4mA

OFFON

Range output

No. 2

Reverse

direction

Forward

direction

Flow rate

Output

Low cutoff

1.25

Low cutoff

From forward direction range to

reverse direction range

(Low cutoff 1.25)

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(5) Single direction (external signal switching), 4 ranges

20mA

4mA

100

125

Output (%)

Range 4 Range 3 Range 2

Range 1

Reverse direction Forward direction Flow rate

External range switching

signal No. 1

External range switching

signal No. 2

L level input H level input

H level input

H level input L level input

L level input

(Range output No. 1)

(Range output No. 2)

ONOFF

ON OFF

OFF

• Current output is 4mA as standard when fluid flows in reverse direction.

When the low cutoff function is not used (low cutoff setting is 0), it is possible to output the

current output signal in linear scale up to 3.2mA or 2.4mA when fluid flows in reverse direction.

• Works even if the range output is not used.

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10.4 Flow Rate High/Low Limit Alarm Output

Proceed as follows to use the flow rate high/low limit alarm.

High/Low Limit Alarm

Value Setting

• Follow the procedure in 8.2.17 “Flow Rate High/Low alarm” and set the high limit

alarm, high-high limit alarm, low limit alarm or low-low limit alarm to ON and set

the alarm value.

For the alarm not used, set OFF to that alarm setting.

DO Setting

• Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output

(DO) for high limit output, high-high limit alarm output, low limit alarm output or

low-low limit alarm output. In addition, for alarm output state, select Normally Open

or Normally Closed.

Flow rate high/low limit alarm output performance

• In the case of Single range

Output (%)

High limit set-point value

Hysteresis

2.5%

Low limit set-point value

Low limit alarm

generated

High limit alarm

generated

Low limit alarm

generated

Time

* The output state when an alarm occurs becomes the state set for alarm output of digital output.

When the power supply of the converter is turned off, the contact is open.

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• In the case of Multi-range setting

Output (%)

High limit set-

pout value

Low limit set-

point value

Range 2 Range 1 Range 2

Hysteresis

2.5%

Hysteresis

2.5%

Hysteresis

2.5%

Low limit alarm

generated

High limit alarm

generated Low limit alarm

generated

Time

* High/low limit alarm set-point value is a value indicated in percent of the Range 1.

* The output state when an alarm occurs becomes the state set for alarm output of digital output.

When the power supply of the converter is turned off, the contact is open.

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• In the case of 2 high limit alarm points (high limit and high-high limit)

Output (%)

High-high limit set-

point

High limit set-point

Hysteresis

2.5%

High limit alarm generated

High-high limit alarm generated

Time

* The output state when an alarm occurs becomes the state set for alarm output of digital output.

When the power supply of the converter is turned off, the contact is open.

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10.5 Fluid Empty Alarm Output

Proceed as follows to use the fluid empty alarm.

(Note: In the case of LF232*F; Fluid empty alarm function is not usable. Set this function 'OFF'.)

Alarm Output Setting

• Follow the procedure in 8.2.18 “Fluid Empty Alarm” and set the fluid alarm setting

to ON (NORMAL, SENTITIVE or SENSITIVE-H).

DO Setting

• Follow the procedure in 8.2.14 “Digital I/O Function” and set the Digital Output

(DO) for fluid empty alarm output.

In addition, for alarm output state, select Normally Open or Normally Closed.

If only the fluid empty detection function is used and external contact output is not

used, DO setting is not needed.

Output when an alarm is generated

• 4 to 20mA output: 4mA (standard)

* Current output value when an alarm is generated can be set by

referring to 8.2.11 “Current Output Setting Used When an Alarm

Occurs.”

• Totalizer, pulse output: Totalizing operation and pulse output stopped

• Measured value display: Instantaneous flow rate is zero.

• Contact output: When an alarm occurs, output contact closes (standard).

* Contact operation when an alarm occurs can be set according to the

alarm output state described in 8.2.14 “Digital I/O Function”

Note: When the power supply of the converter is turned off, the contact is open.

* For how to use the fluid empty alarm, see Precautionary notes in 12. “Diagnosis and Alarms.”

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10.6 Preset Counter Output Function

A contact signal is output when the totalized flow count exceeds the preset value (preset count value).

Proceed as follows to use the preset counter output.

Totalizer Setting

• Follows the procedure in 10.2 “Totalizer and Pulse Output” and set necessary

items to the totalizer.

Preset Count Value, Preset

Output Function Setting

• Follow the procedure in 8.2.16 “Preset Counter” and set the preset count value and

output function.

DO/DI Setting

• Follow the procedure in 8.2.14 “Digital I/O Function” and set the digital output

(DO) for use as a preset counter output.

In addition, if you want to reset the totalizer by an external signal, set the DI for

the totalizer counter Reset/Start signal. (Set F3: DI FUNCTN to 2: C RES/STA.)

* Operation for the totalizer control signal can be set using the control signal level

setting described in 8.2.14 “Digital I/O Function.”

When the operation switch in the converter is used to reset the counter, the digital

input function (DI) setting is not needed.

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Preset counter output performance

• Example to reset the totalizer using an external signal input

(When preset output level hold (Contact ON) is set)

OFF

Reset/Start signal

(DI control signal level H)

Totalizer flow count

Preset output

Counter reset Counter start

H level input

L level input

Preset count

set-point value

Counter reset

Input/Output Timing Chart

* When the Reset/Start signal is in H level (DI counter control signal level: H), the totalizer is reset to

zero and stops counting. When the Reset/Start signal goes to L level, the totalizer starts counting.

The preset output goes ON when the totalizer count exceeds the preset value, and the output goes

OFF when the totalizer is reset to zero.

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• Example to reset the totalizer using an external signal input (When one-shot pulse output is set)

OFF

Reset/Start signal

(DI control signal level L)

Totalizer flow count

Preset output

Counter reset Counter start

H level input

L level input

Preset count

set-point

Counter reset

Preset output is OFF

because Counter is reset.

Preset output OFF because

pulse width is reached.

Input/Output Timing Chart

* When the Reset/Start signal is in L level (DI counter control signal level: L), the totalizer is reset to

zero and stops counting. When the Reset/Start signal goes to H level, the totalizer starts counting.

The preset output goes ON when the totalizer count exceeds the preset value, and the output goes

OFF when the pulse width is reached or the totalizer is reset to zero.

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• Output example of one-shot pulse output

OFF

100

200

Preset count set-point value: 100

Totalizer count

Preset output

Preset output OFF because

pulse width is reached.

Input/Output Timing Chart

* Preset output goes ON when the count value exceeds the preset value of 100 and the preset output

goes OFF when its width reaches the set pulse width.

When the preset value exceeds 100, the preset value is changed to 200 (adding the preset count of

100 to the current preset value of 100).

Then, the preset output goes ON when the count value exceeds the preset value of 200, and the

preset output goes OFF when its width reaches the set pulse width.

When the preset value exceeds 200, the preset value is changed to 300 (adding the preset count of

100 to the current preset value of 200).

Note: When the one-shot pulse output function is selected, if its pulse width is large compared

with the update interval of the preset value, the output stays ON. To make sure to output

a one-shot pulse, set the preset value so that

the conditions in the table below are

satisfied.

Pulse width setting Preset count value condition

Interval that the preset value reaches

Example: Count rate: 0.01 l

Flow verosity: 10 l/s

Count-up rate:1ms/COUNT

50ms 100ms or more Preset count value: 100 or more

500ms 1000ms or more Preset count value: 1000 or more

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10.7 Remote Still Water Zero Adjustment

Still water zero adjustment can be performed using an external signal.

To use this function, follow the procedure in 8.2.14, “Digital I/O Function” and set the DI as a zero

adjustment start signal.

[Signal input condition]

Zero adjustment signal

10 seconds

20 seconds

Zero

adjustment

start

H level signal

L level signal

* The signal must be set to H level first and then it must go to L level 10 seconds later but not more

than 20 seconds, and then zero adjustment starts at the falling edge of the signal.

If the signal stays in H level less than 10 seconds or more than 20 seconds, the signal will be

ignored.

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10.8 Remote Selection of Fixed Value Output

4 to 20mA output and pulse output can be set to a fixed preset value using a remote signal input.

Proceed as follows to use this function.

Fixed Output Value Setting

• Follow the procedure in 8.4 “Fixed Value Output (Loop Check)” and set the

current output value and pulse output value to be used at the time of fixed output.

Set OFF for fixed output switching.

If the pulse output is not used, it is not necessary to set the pulse output value.

DI Setting

• Follow the procedure in 8.2.14 “Digital I/O Function” to set the Digital Input (DI)

to use it as fixed output mode control signal.

Signal input condition

External signal input 4 to 20mA and pulse output

L level input Measured value is output.

H level input Fixed preset value is output.

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10.9 Converter Error Alarm Output

If one or more of the following errors occur in a self-diagnosis sequence, an alarm signal will be

output using contact signals.

List of Alarm Output Factors

Diagnosis error alarm output (DO)

Diagnosis error item

WITHOUT EMP WITH EMP

RAM error

ROM error

Exciting current value error

Exciting current wire broken

ADC error (error of flow measurement circuit)

Parameter error

Fluid empty alarm

−

○: If an error is detected, DO diagnosis error alarm is output.

−

: Even if an error is detected, DO diagnosis error alarm will not be output.

(Alarm message is displayed)

Self-Diagnosis Function Setting

• Follow the procedure in 8.2.19 “Self-Diagnosis Function” and set whether the

self-diagnosis function is On or Off and set the alarm output factors.

For alarm output factors, set whether the fluid empty alarm should be included

(WITH EMP) or not included (WITHOUT EMP) for alarm output.

DO Setting

To use the converter error alarm output, follow the procedure in 8.2.14 “Digital

I/O Function” and set the Digital Output (DO) for converter error alarm output.

In addition, for alarm output state, select Normally Open or Normally Closed.

If the self-diagnosis function only is used and external contact output is not used,

DO setting is not needed.

• Contact output operation

NORMAL OPEN : If an error occurs, contact closes

NORMAL CLOSE : If an error occurs, contact opens

Note: When power supply is turned off, the contact is OFF (contact opens).

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11. Communications Function

The LF232 Series Converters are equipped with HART*1 protocol to transmit digital signals over the 4

to 20mA output line. The AF900 hand-held terminal (hereafter called HHT) can be used to check or

change various parameters, calibrate the flowmeter or monitor the measured value from a remote

place.

For the detailed operation and specification of HHT, refer to the "Hand-held Terminal for Sensor with

Communication Function AF900 Instruction Manual" (6F8A0849).

*1 HART protocol: The “HART protocol”, which stands for Highway Addressable Remote

Transducer, is the name of the communication protocol for industry sensors that is

recommended by HCF (HART Communication Foundation).

11.1 Connection with the HHT terminal

Connect the probe cable of the HHT terminal in parallel with the load resistor which is wired from the

current output terminals (+ and −) of the flowmeter. Since the tip end of the probe cable is a pair of

clips, use a junction terminal or a terminal block, etc. to connect with the clips of the probe. To

connect the HHT directly to the flowmeter, use the terminals + and − of the converter main unit

terminal block. Though the current output terminal has polarity, the HHT connection cable has no

polarity.

See Figure 11.1 and 11.2 for connection examples.

4 to 20 mADC

HHT

LF232 Converter

(Communication line)

Load resistor

Terminal block or

junction terminal

Figure 11.1 Connections to the Current Output Line

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Converter terminal block

HHT

Figure 11.2 Connection to the Converter Main Unit

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11.2 Procedure for Communication with HHT

This section describes the HHT basic operations for communication between the flowmeter and HHT.

For details, refer to the HHT instruction manual.

* Carrying out the following preparatory operations to a commercially available PDA (OS: Windows

CE), the PDA can be used as a HHT.

Procedure Operation

Prepare a hand-held terminal (1) Install the AF900 application software to a

commercially available PDA (OS: Windows CE) main

unit. Then insert the serial interface card supplied

with AF900 to the card slot of the PDA.

Prepare a hand-held terminal (2) Connect the HART interface cable and serial interface

card supplied with AF900 to each other.

Connect the HHT Connect the alligator clips at the end of the HART

interface cable to the current output line of the

converter via a load resistor.

Start the HHT Turn on the power supply of the PDA to start the

AF900 application software.

Preliminary communication Execute [sensor communication]. The model name of

the connected sensor product is automatically

identified and the converter menu screen appears.

Check or change the data Press the relevant parameter button and check or

change the desired data.

Exit the communication When all of the operations are complete, press the

[Exist Application] in the top screen to turn off the

power supply of the PDA.

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11.3 Cautionary Notes on Communications

Observe the following limitations when you communicate with flowmeter using HHT.

Current output load

(1) Load resistance: 240Ω to 1kΩ (including communications line resistance)

(2) Load capacitance: 0.25 μF maximum (including communications line capacitance)

(3) Load inductance: 4mH maximum (including communications line inductance)

(For maximum cable length, about 2km is a guideline length when CVV-S

1.25mm2 is used.)

Wiring cable

Use a shielded cable (CVV-S, etc) for wiring.

Interference on 4 to 20mA current signal

To communicate with the flowmeter, a digital signal (amplitude 0.4 to 0.8 V in the case of 500Ω

load resistance) with a frequency of 1.2 to 2.2 kHz is superimposed on the 4 to 20mA current signal.

If a receiving instrument with fast response time is connected to the analog current output line, the

superimposed communications signal may interfere with the output. To prevent this interference,

put a low-pass filter with a time constant of about 100 ms into the input circuit of the receiving

instrument.

Current output line

Load resistor

Converter Filter Receiving instrument

Figure 11.3 Filter Connection Example

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12. Diagnosis and Alarms

12.1 Diagnostic messages

The LF232 converter is equipped with the function to diagnose such errors as setting errors, I/O errors

or internal errors of the instrument and shows the error messages on the LCD display or on the HHT

through communications. The diagnostic messages and their corrective actions are described below.

Setting error

If you try to set a constant or a unit exceeding the specified range in the setting mode, an error is

displayed to prevent erroneous setting.

LCD display Description Corrective action

* H.OVER SPEC. Setting value exceeds the settable

range.

* L.OVER SPEC. Setting value is below the settable

range.

* H.OVER C RATE Count rate exceeds the settable

range.

* L.OVER C RATE Count rate is below the settable

range.

Try to set a value within the

settable range again.

* MULTI RNG ERR Span value setting does not satisfy

the multi-range requirements.

Try to set a span value that

satisfies the requirements.

High/low limit alarm

An alarm message appears if the flow rate indication goes out of the set range.

If the alarm is set to OFF, this function does not work. For how to set this function, see 8.2

“Parameter Check/Change.”

LCD display Description Corrective action

HIGH ALARM Flow rate is above the high limit

set-point value.

Adjust so that the flow rate stays

below the set-point value.

H-HIGH ALARM Flow rate is above the high-high

limit set-point value.

Adjust so that the flow rate stays

below the set-point value.

L ALARM Flow rate is below the low limit

set-point value.

Adjust so that the flow rate stays

below the set-point value.

L-LOW ALARM Flow rate is below the low-low

limit set-point value.

Adjust so that the flow rate stays

below the set-point value.

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Process error alarm

LCD display Description Corrective action

OVER 125%

The measured value is above the

125% of the span.

The setting range for measured value

is narrow or the flow rate is

unexpectedly large. Check whether

the set value is correct or not and

check that there is no problem in the

process.

UNDER –125%

The measured value is below the

−125% of the span

The setting range of measured value

is narrow or the flow rate is

unexpectedly large. Check whether

the set value is correct or not and

check that there is no problem in the

process.

Fluid empty alarm

Detects that the fluid in the measuring pipe of the detector is empty and an alarm will be displayed.

If the alarm is set to OFF, this function does not work. For how to set this function, see 8.2

“Parameter Check/Change.”

(Note: In the case of LF232*F; Fluid empty alarm function is not usable. Set this function 'OFF'.)

LCD display Description Corrective action

EMPTY Fluid is not filled in the measuring

pipe of the detector.

Take measures to fill the pipe with

fluid.

Precautionary notes when using the fluid empty alarm

(1) Since the fluid empty alarm is detected using the impedance between the signal wires connected

to a pair of electrodes in the detector as well as the input signal level, a false alarm may be

detected by the following factors:

• Signal wire is broken or loose connection exists

• A large amount of air bubbles are mixed in the fluid

• Insulating materials are accumulated on the electrode

(2) In an environment where grounding is incomplete or excessive noise enters from the outside, the

fluid empty alarm may not work correctly.

In addition, under the condition like this, reliability of flow measurement itself decreases. Take

necessary measures to prevent the entry of noise such as making the ground complete

(independent Class D ground with grounding resistance 100Ω or less) or reviewing the cable

wiring route.

(3) If the fluid still remains in the measuring pipe or deposits of conductive materials remain in the

measuring pipe, the impedance between the signal wires does not increase and the fluid empty

alarm may not work. In this case, use other method (such as a pump stop signal or a signal from

valves) to check the fluid empty condition.

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Self-diagnosis error

The converter performs an operation check immediately after power is turned on and if an error is

found, a self-diagnosis error is generated.

If more than one error occurs at the same time, the contents of those errors will be displayed

cyclically. The diagnosis about excitation is carried out using the internal ADC function. Therefore,

if an error of No.6 internal ADC occurs, Excitation wire of No.4 and Excitation circuit of No.5

cannot be diagnosed correctly.

In addition, since the entire checking system is based on the CPU, if the CPU fails, accurate

diagnosis and indication cannot be obtained.

No. LCD display Description Corrective action

1 * ROM ERROR * ROM error occurred

2 * RAM ERROR * RAM error occurred

3 PARAMETER

FAIL

An error occurred in the internal

parameters in the memory

Internal parts or printed-circuit board must be

repaired or replaced.

Contact your nearest Toshiba representative.

4 EX. CURR. OPEN Excitation wires are not

connected.

Connect the excitation wires correctly.

5 EX. CURR. ERROR An error occurred in the

excitation circuit.

6 ADC. ERROR An error occurred in the ADC

circuit

Internal parts or printed-circuit board must be

repaired or replaced.

Contact your nearest Toshiba representative.

7 INVALID TOTAL

Totalized data in the memory

was destroyed caused by the

entry of noise.

(No message appears if the data

is not displayed in an indicating

unit of totalization.)

The error message disappears if you press the

reset key to clear the totalized data.

Note 1: Diagnosis for No. 1, No.2 and No. 3 is performed only immediately after power is turned on. If any of

these errors is indicated, the converter does not start measurement operation. If these errors occur after

power is turned on, the converter cannot detect these errors. In addition, if this happen, the indication

and output of the converter may become uncertain.

Note 2: Errors No. 4 to No. 6 may not be detected even if those errors cause accuracy problems because of the

characteristic variations in components constituting the circuits used for judgment standard to

determine these errors.

Note 3: CPU error cannot be detected. If the CPU stops, the watchdog timer resets the hardware and the

flowmeter starts again from the initial power-on condition. Depending on the condition of CPU error,

the indication and output of the converter may become uncertain.

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12.2 Output When an Error or Alarm Occurs

Error indication Measured value

display

Current output

(4 to 20mA)

Totalizer pulse

output Remarks

ROM ERROR (Note 1)

−

4mA (standard)

(Note 3)

Stopped After power-up, measurement

does not start.

RAM ERROR

−

4mA (standard)

(Note 3)

Stopped After power-up, measurement

does not start.

PARAMETER FAIL

(Note 2)

Zero 4mA (standard)

(Note 3)

Stopped

−

EX.CURR OPEN Zero 4mA (standard)

(Note 3)

Stopped Still water zero adjustment

cannot be conducted.

EX.CURR ERROR Zero 4mA (standard)

(Note 3)

Stopped

−

ADC ERROR Zero 4mA (standard)

(Note 3)

Stopped

−

EMPTY Zero 4mA (standard)

(Note 3)

Stopped Still water zero adjustment

cannot be performed.

INVALID TOTAL Measured value Measured value Measured value The error message disappears if

you clear (reset) the totalizer.

HIGH ALARM Measured value Measured value Measured value

−

H-HIGH ALARM Measured value Measured value Measured value

−

L ALARM Measured value Measured value Measured value

−

L-LOW ALARM Measured value Measured value Measured value

−

Note 1: The display and output may be uncertain depending on the nature of the ROM error.

Note 2: If a parameter failure relating to the current output occurs, the current output may not become exactly

the set value of the current output used when an alarm occurs.

Note 3: The output becomes the value selected in 8.2.11 “Current Output Setting Used When an Alarm

Occurs.”

Note 4: If the fluid empty alarm not included (WITHOUT EMP) is selected (standard) in the setting for alarm

output factors in 8.2.19 “Self-Diagnosis Function,” the output becomes 4mA and if the fluid alarm

included (WITH EMP) is selected, the output becomes the same as the above in Note 3.

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13. Maintenance and Inspection

Do not conduct wiring work when power is

applied.

Do not touch the LF232 main body when high

temperature fluid is being measured.

DON’T

Wiring while power is applied can

cause electric shock.

DON’T

The fluid raises the main body

temperature and can cause burns

when touched.

13.1 Maintenance

Mag-Prover Calibration / Check

The LF232 converter has a built-in reference signal calibration and verification circuit that allows

you to re-verify the original flowmeter flow lab calibration without the need for external devices.

This reference signal can be used to check and adjust the circuit to perform zero and span

calibration of the converter itself and for the purpose of maintenance and periodical inspection. See

9. “Mag-Prover Calibration.”

Check / Replacement of fuse

Fuse can be taken out by turning the top of the fuse holder counterclockwise. Check that the fuse is

not damaged. In addition, fuse has its own life and it must to be replaced periodically.

(Recommended replacement cycle is about 3 years.)

Type of fuse used: Glass tube fuse (normal blow type)

Rating: In the case of power supply 100 to 240 VAC and 110VDC

1A, 250V 2 pieces

In the case of power supply 24VDC and 100 to 120 VAC for large meter size

detector

2A, 250V 2 pieces

In the case of power supply 24VDC for large meter size detector and 24VDC

for partially filled pipes detector

3A, 250V 2 pieces

Dimensions: Diameter 5.2 mm × 20 mm

Check / Replacement of display unit

If the characters displayed on the LCD become thin or blots come out, the life of the LCD is

reached. Replace the display unit with a new one. In order to use the display unit stably for a long

time, it is preferable to replace it early. For inspection and replacement, please contact your nearest

Toshiba representative.

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Check / Replacement of power supply unit

In general, electronic components deteriorate faster if the ambient temperature is high. The life of

the power supply unit is about 10 years if the ambient temperature is 40°C, and 5 to 6 years if the

temperature is 50°C or more. To extend the life of the flowmeter, it is recommended that you

replace the power supply unit early.

Contact your nearest Toshiba representative for a flowmeter inspection or unit replacement.

Product disposal

The main body or parts of the converter must be disposed of, according to the rules and regulations

of your local government.

Especially if you dispose of electrolytic capacitors to replace parts, have it done by an agency

which is licensed to handle industry waste materials.

Operative life

The operative life of this flowmeter is 10 years from the date of shipment.

The life of the flowmeter differs depending on the environmental conditions and the way it was

used. To extend the life of the flowmeter, inspect the flowmeter periodically and clean or replace

components if necessary.

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13.2 Troubleshooting

If a problem occurs, you may find a cause of the problem by performing the simple inspection.

Before you call repair service personnel, inspect the flowmeter using the flowcharts shown below.

13.2.1 Flow rate is not indicated

Install the cables correctly according to

5. “Wiring.”

Replace the fuse with a new one.

NO Set the velocity range correctly

according to 8. “Parameter Settings.”

YES

Does the flow direction agree

with the arrow mark on the

detector?

Install the detector correctly according to

4. “Installation.” In addition, set the

direction of flow correctly according to 8.

“Parameter Settings.”

Contact your nearest Toshiba

representative.

Is the velocity range set

correctly?

Isn't the fuse blown?

Are cables installed correctly?

YES

START

Use the rated power supply for each

device.

Is the rated power supplied for

each device?

YES

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13.2.2 Flow rate indication is not correct

YES Connect the two load resistors in series,

if necessary.

Contact your nearest Toshiba

representative.

Aren't there two load resistors

connected to the output in

parallel?

YES

Set it correctly according to 8.

“Parameter Settings/Adjustment.”

Perform zero adjustment according to 6.

“Operation” and 8.5 “Zero Adjustment.”

Is zero point correctly set?

Is the velocity range correctly

set?

YES

START

Set the exciting current correctly

according to 8. “Parameter Settings.”

Clean the inside wall of the detector pipe

to remove the deposits.

Isn't the inside wall of detector

pipe or electrode contaminated?

Is the exciting current correct?

YES

Design the output circuit so that the

output load resistance is less than 1 k .

Is the output load resistance 1k

or less?

Is accuracy calculated as follows?

NO Calculate as shown on the left.

100 (%)

YES

(Actual flow rate)(Measured flow rate)

Actual flow rate

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13.2.3 Flow rate indication is not stable

Use a power supply within the specified

range.

Ground the converter/detector with

Class D ground (100 or less ground

resistance) using IV wire of 5.5 mm²

minimum.

Design piping so that the detector pipe

is filled with fluid all the time.

YES Design piping so that the fluid does not

carry bubbles.

Isn't there large-current or high-

voltage cable or equipment near

the flowmeter?

YES Install the flowmeter away from the

equipment producing electromagnetic or

electrostatic interference.

Contact your nearest Toshiba

representative.

Isn't the fluid in the detector pipe

carrying bubbles?

Is the detector pipe filled with

fluid?

Are converter and detector

grounded with Class D ground

(100 or less ground resistance)?

Is power supply voltage within

the specified range?

YES

START

Connect each cable securely to the

terminal block.

Aren't the cables slackened?

YES

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13.2.4 When switch operation is unable

START

Place a cover to block the li

ht from

surroundin

s, or cover the control panel

by hand to block the light.

Does intense light shine on the control panel

such as direct sunli

ht or reflected sunli

ht b

window glass or metal sheet?

YES

Place a cover to block the li

ht from

surroundin

s, or cover the control panel

by hand to block the light.

Does the brightness change always by

ON/OFF of lighting?

YES

ou workin

with unfixed li

htin

such as

a flashlight?

Operate the EMF converter fixin

a li

ht to

shine on the control panel as constantl

possible.

YES

Does the control panel get rained?

Place a cover on the control panel to

protect from rain, and operate the EMF

converter.

YES

Is the control panel attached with dewdrop,

snow, ice, mud or oil?

Is the control panel hazed by steam?

Clean the attached or haze and operate

the EMF converter.

Further, place a cover to prevent from

attaching.

YES

Are you wearing dark color gloves?

Or are your finger or gloves stained?

Clean the stain on fin

ers or

loves, or

wear

loves in li

ht color and operate the

EMF converter.

YES

Is there any light reflectin

ect near the

control panel?

Secure a space in front of the control panel

to allow a person to stand.

YES

Is there an

reflectin

ect such as metal

plate placed opposing to the control panel?

Operate the EMF converter blocking the

light from the reflectin

ect b

standin

in-between the control panel and the

reflecting object.

Contact your nearest Toshiba representative.

YES

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14. Principle of Operation

The operating principle of the electromagnetic flowmeter is based on Faraday's Law of

electromagnetic induction. The principle of operation is that an insulated pipe with inner diameter D is

placed vertically to the direction of a magnetic field with flux density B (see Figure 14.1). When an

electrically conductive fluid flows in the pipe, an electromotive force signal E is induced between a

pair of electrodes placed at right angles to the direction of magnetic field. The electromotive force

signal E is directly proportional to the average fluid velocity V and this voltage signal is detected.

The following expression is applicable to the voltage.

E = K × B × D × V [V] ····································· (Eq. 14.1) E: Electromotive force signal [V]

K: Constant

B: Magnetic flux density [T]

D: Meter pipe inner diameter [m]

V: Fluid velocity [m/s]

Volumetric flow rate Q [m3/s] of fluid is:

π × D2

Q = 4 × V ··········································(Eq. 14.2)

Thus, we can obtain the equation below using Eq.14.1 and Eq.14.2,

E = K × B × D π × D2 × Q

4 × K × B

E = π × D × Q·····································(Eq. 14.3)

Therefore, the electromotive force signal E proportional to the flow rate can be obtained.

Square-Wave Excitation Method

Figure 14.1 Principle of Operation

The LF232 electromagnetic flowmeter converter uses the square-wave excitation method, which

provides long-term stable operations without being affected by electrostatic and electromagnetic

interferences.

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15. Specifications

15.1 Specifications

Detector Combined Specifications

1. Measuring range: (measuring range in terms of flow velocity)

0 –1.0 ft/s to 0 – 32.8 ft/s (0 – 0.3 m/s to 0 –10 m/s)

For partially filled pipes detectors (Combined detector is LF502)

Meter Measurement range

6” (150mm) 0 – 264 GPM(std) to 0 – 1320 GPM

(0 – 60 m3/h to 0 – 300 m3/h )

8” (200mm ) 0 – 484 GPM(std) to 0 – 2420 GPM

(0 – 110 m3/h to 0 – 550 m3/h )

10” (250mm ) 0 – 770 GPM(std) to 0 – 3850 GPM

(0 – 175 m3/h to 0 – 875 m3/h )

12” (300mm ) 0 – 1100 GPM(std) to 0 – 5500 GPM

(0 – 250 m3/h to 0 – 1250 m3/h )

14” (350mm ) 0 – 1540 GPM(std) to 0 – 7700 GPM

(0 – 350 m3/h to 0 – 1750 m3/h )

16” (400mm ) 0 – 1980 GPM(std) to 0 – 9900 GPM

(0 – 450 m3/h to 0 – 2250 m3/h )

20” (500mm ) 0 – 3124 GPM(std) to 0 – 15620 GPM

(0 – 710 m3/h to 0 – 3550 m3/h )

24” (600mm ) 0 – 4400 GPM(std) to 0 – 22000 GPM

(0 – 1000 m3/h to 0 – 5000 m3/h )

(Above flow rate is almost 0 – 3.28 ft/s (std) to 0 – 16.4 ft/s (0 – 1 m/s to 0 – 5 m/s ) flow velocity.)

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2. Measurement accuracy: (Accuracy when combined with detector)

• Combined detector: LF470 (Meter size 1/10” to 1/4” (2.5 to 6mm))

Range

Flow rate to the range (%) 1.0-3.3ft/s

(0.3-1.0m/s )

3.3-32.8ft/s

(1.0-10m/s )

0 to 50 % ± 0.8 % FS ± 0.4 % FS

50 to 100 % ± 0.8 % FS ± 0.8 % of rate

• Combined detector: LF150 (Meter size 20” to 120” (500 to 3000mm))

±0.5 % of Rate*

* This error is pulse output results calibrated under standard operating conditions at Toshiba’s

flow calibration facility.

* Individual meter’s measurement error mayvary up to ± 0.8 % of Rate at 3.28 ft/s (1.0 m/s) or

more and ± 0.4% of Rate ±0.157 inch/s (4mm/s) at 3.28 ft/s or less.

* Refer to individual calibration data for each meter’s measurement error.

• For partially filled pipes detectors (Combined detector is LF502)

± 2 % FS

Note: Accuracy is measured when detector and converter are newly combined under the basic

operating conditions in the Toshiba calibration facility.

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3. Other specifications

• Conductivity: 5μS/cm or more

(If detector is partially filled pipes type, conductivity is 100μS/cm or more)

• Power supply: 100 to 240VAC (allowable voltage range: 80 to 264VAC, 50/60Hz)*1 or

24VDC (allowable voltage range: 21 to 27VDC)*2

• Power consumption: 17W (27VA ) or less (when 7th digit of specification code is “A”)

35W (60VA ) or less (when 7th digit of specification code is “B”)

30W (50VA ) or less (when 7th digit of specification code is “F”)

*1 When the 7th digit of specification code is “B” and “F”, power supply is 100 to 120VAC

(allowable voltage range is 80 to 132VAC, 50/60Hz)

*2 When the 7th digit of specification code is “B” and “F”, 24VDC cannot be selected.

• For partially filled pipes detectors:

Fluid water level range:

Meter size 6”-12” (150-300mm) : Water level 1 1/4(30mm) to state to be filled with water

Meter size 14”-24” (350-600mm) : 10% of meter size to state to be filled with water

Note) State to be filled with water is water level 100%

Necessary straight pipe length:

Upstream side : 10D or more

Downstream side: 5D or more

Note) D is meter size.

Converter specifications

1. Input signal: Flow rate proportional signal from the detector

2. Output signal: 4 to 20mADC (current signal, load resistance 0 to 1kΩ)

3 Digital Input/Output

• Digital Output

Digital Output 1: Output type Transistor open collector

Number of outputs 1

Capacity 30VDC, 200mA max.

Digital Output 2 (option: added when 9th digit of specification code is “3”) :

Output type Solid-state contact output

Number of outputs 3

Capacity 150VDC, 150mA max.

150VAC (peak value), 100mA max.

* For digital output function, either of the following functions can be selected.

Digital Output function

• Totalizer pulse output DO1 or DO2 can be selected

(Forward direction pulse and reverse direction pulse can be assigned independently)

In the case of DO1 Pulse rate 3.6 to 3,600,000 pulses/h

Pulse width Settable within the range of 0.3 to 500ms

In the case of DO2 Pulse rate 3.6 to 360,000 pulses/h

Pulse width Settable within the range of 4 to 500ms

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• Range switching output One Digital Output (DO) is used

• Single direction, 2-range switching signal

• Forward/reverse direction switching signal

Two Digital Outputs (DO) are used

• Single direction, 4-range switching signals

• Forward/reverse 2-range switching signals

• High/low limit alarm output

An alarm is output when flow rate goes above or below the

set-point value

Setting range −10 to 110% of the settable maximum range

High limit 2 points, low limit 2 points can be set

At the time of alarm output, Normally Open or Normally Closed

contact can be selected

• Preset counter output

Contact ON when totalizer count exceeds the set value

Setting range 1 to 99999999 count

• Converter error alarm

An alarm is output when an operation error is detected by

self-diagnosis.

At the time of alarm output, Normally Open or Normally Closed

contact can be selected

• Digital Input (option: added when 9th digit of specification code is “3”): 2 Digital Inputs

Signal type: Voltage signal of 20 to 30 VDC (H level: 20 to 30 VDC, L level: 2 VDC :

or less)

Input resistance: About 2.7 kΩ

* For digital input function, either of the following functions can be selected.

Digital Input function

• Range switching input One Digital Input is used: switching between large and small ranges

of forward/reverse, 2-range measurement

Two Digital Inputs are used: switching between ranges of single

direction, 4-range measurement

• Totalizer control input Totalizer Start/Stop control or Reset/Start

• Output hold input Fixed with set value for current output and pulse output (loop check)

• Zero adjustment input Performs still water zero adjustment

4. Communication function

• Communication signal: Digital signal is superimposed on 4 to 20mA signal line (conforms to

HART*1 protocol)

• Load resistance 240Ω to 1kΩ

• Load capacitance 0.25μF or less

• Load inductance 4mH or less

(For maximum cable length, about 2km is a guideline length when CVV-S 1.25mm2 is used

under standard installation condition.)

*1 HART: “HART” stands for Highway Addressable Remote Transducer and is the name of the

communication protocol for industry sensors that is recommended by HCF (HART

Communication Foundation).

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5. Display/setting items

• Output display: 16-character × 2-line dot-matrix LCD (with back light)

Indicating unit: 2 units can be selected from the flowing units: flow velocity, instantaneous

flow rate, total flow (forward/reverse/difference flow), total count, %, custom

unit.

• Setting: Various parameters can be set without opening the converter housing using 4 infrared

switches (password can be set)

Settable also with AF900 Handheld terminal

• Damping: 0.5 to 60 seconds (settable in increments of 1 second)

• Zero adjustment: Adjustable with infrared switches

•“Field re-verification” Mag-Prover – Toshiba’s Zero span calibration tool :

Allows unit to be re-calibrated and verified using internal software program

(for more information contact Toshiba International Corp.)

• Operation at power failure: Various setting values are stored in non-volatile memory.

Current output 0mA

Digital Output OFF (contact open)

Display Unlit

6. Other items

• Mass: Approx. 18 lb (8kg) (including a mounting fitting)

• Ambient temperature: -4 to 140 °F (-20 to 60 °C)

(storage temperature: -13 to 149 °F (-25 to 65 °C))

• Arrester: Included in the power supply circuit, current signal output circuit and digital I/O

circuit.

• Terminal block structure: 21-pole, screw connection type (M4 screw)

• Housing material: Aluminum alloy

• Painting: Acryl resin baked painting with pearl gray color

• Structure: IP 67

• Cable ports: G (PF) 1/2 female thread with cable connection

Adaptable cable diameter: φ0.433 to 0.512 inch (φ11 to 13mm)

Material: Nylon 66

• Vibration resistance: No resonance point exists when the following vibration is applied:

10 to 55Hz with amplitude of 0.07mm,

No problem occurs when vibration of 30Hz, 29.4m/s2 is applied in each

direction for 4 hours each.

Note: If the flowmeter is intended to be used in a location where vibration is applied constantly,

contact Toshiba.

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15.2 Model Number Table

LF232*A, LF232*B Converter model number table

Model number Specification code

1 2 3 4 5 6 7 8 9 10 11 12

Description

L F 2 3 2 Separate type converter

Purpose

A Standard

Compatible detector (Note 1) (Note 2) (Note 3)

A Medium to small size (Meter size: 1/10” to 18”(2.5 to 450mm))

B Large size (Meter size 20” to 120” (500 to 3000mm))

Mounting nuts and bolts

C Panel, wall mounting (BNP material: SUS304)

E Pipe mounting (BNP material: SUS304)

Digital input/output

1 Current output

+ Digital outputs points (1 point)

3 Current output

+ Digital outputs points (4 point) + Digital nputs points (2 point)

Communication function

1 HART communication

Power supply

1 100 to 240VAC, 50/60Hz (Note 2)

2 24VDC (Note 3)

A Standard

• Note 1: For applicable detector code, select one from the following table.

To combine with an existing detector, select one depending on the type of replaceable converters.

For combination with detectors not listed below, contact Toshiba.

Applicable

detector code

Applicable

detector

Applicable detector

(discontinued model) Replaceable converters

A LF470 type

334,

335 type (Converters of

types shown right)

372, LF200, LF220,

LF420, LF230* A type

B LF150 type

337,

335 type (Converters of

types shown right)

373, 378, LF230* B type

• Note 2: When the 7th digit is “B” and power supply specification code is “1”, power supply specification

is 100 to 120VAC.

• Note 3: 24VDC can be specified only when the 7th digit is “A”.

6F8A0917

170

LF232*F (for partially filled pipes detectors) Converter model number table

Model number Specification code

1 2 3 4 5 6 7 8 9 10 11 12

Description

L F 2 3 2 Separate type converter

Purpose

A Standard

Compatible detector

F For Partially-filled pipes

(Meter size : 6” to 24” (150mm to 600mm) )

Mounting nuts and bolts

C Panel, wall mounting (BNP material: SUS304)

E Pipe mounting (BNP material: SUS304)

Digital input/output

1 Current output

+ Digital outputs points (1 point)

3 Current output

+ Digital outputs points (4 point) + Digital nputs points (2 point)

Communication function

1 HART communication

Power supply

1 100 to 120VAC, 50/60Hz

A Standard

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16. Outline Drawing

Electromagnetic Flowmeter Converter LF232 Type Gross mass: approx. 18 lb(8kg)

(including a mounting plate)

Figure 16.1 Outline of Electromagnetic Flowmeter Converter 232 Type

2.94(74)

8.74(222)

9.33

(237)

6.10(155)

15.75(400)

φ0.47(φ12) hole (4 places)

2.99

(76)

2.99(76) 2.99(76)

nal cable connection

Output cable connection

Power cable connection

Ground terminal

Excitation cable

connection

Digital I/O cable connection

Unit : inch (mm)

14.

(

6F8A0917

172

Write down the address and phone number of the distributor from which you purchased this product,

the product code, SER.NO. and so on.

Distributor Address

Name

Phone number ( ) −

Product code LF

SER. NO.

FCF50017

Toshiba Tohsiba Electromagnetic Flowmeter Converter L5232 Users Manual

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