Toshiba 62373831 Density Meter User Manual 6F8A0521 LQ500 030910

Toshiba Corporation Density Meter 6F8A0521 LQ500 030910

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6 F 8 A 0 5 2 1
OPERATION MANUAL
DENSITY METER
TYPE LQ500
6 F 8 A 0 5 2 1
INTRODUCTION
Thank you very much for your purchase of the LQ500 Density Meter (Hereafter, LQ500).
This manual is prepared for people in charge of installation, operation or maintenance. The manual
describes the precautions in using the meter, and explains about installing, adjusting, calibrating and
maintaining the LQ500 meter.
Carefully read this manual before using the meter for efficient and safe operation. Always keep the
manual in a place where you can easily access.
◆ About Safety Precautions
Carefully read the Safety Precautions that appear in the following pages before using the Meter.
The safety signs used in the Safety Precautions will appear again in the following sections for your
safety.
■ Notice
1.
2.
3.
Do not copy or transcribe this manual in part or entirety without written permission from Toshiba.
The manual is subject to change without notice.
Although we tried hard to make this manual error free, if you find any errors or unclear passages,
kindly let us know.
 1 
6 F 8 A 0 5 2 1
SAFETY PRECAUTIONS
Important information is shown on the product itself and in the operation manual to protect users
from bodily injuries and property damages, and to enable them to use the product safely and
correctly.
Please be sure to thoroughly understand the meanings of the following signs and symbols
before reading the sections that follow, and observe the instructions given herein. Keep the
manual in a place you can easily access to whenever you need it.
[Explanation of Signs]
Sign
Description
WARNING
Indicates a potentially hazardous situation which could result in
death or serious injury, if you do not follow the instructions in this
manual.
Indicates a potentially hazardous situation which may result in
minor or moderate injury*1, and/or equipment-only-damage*2, if
you do not follow the instruction in this manual.
Note 1: Serious injury refers to cases of loss of eyesight, wounds, burns (high or low temperature),
electric shock, broken bones, poisoning, etc., which leave after-effects or which require
hospitalization or a long period of outpatient treatment of cure.
Note 2: Minor or moderate injury refers to cases of burns, electric shock, etc., which do not require
hospitalization or a long period of outpatient treatment for cure; equipment damage refers
to cases of extensive damage involving damage to property or equipment.
CAUTION
[Explanation of the Symbols]
Symbol
Description
This sign indicates PROHIBITION (Do not).
The content of prohibition is shown by a picture or words beside the
symbol.
This sign indicates MANDATORY ACTION (You are required to do).
The content of action is shown by a picture or words beside the symbol.
Red
Yellow
This shape or symbol indicates WARNING.
The content of WARNING is shown by a picture or words beside the
symbol.
◆Color back : red, flame, picture and words : black
This shape or symbol indicates CAUTION.
The content of CAUTION is shown by a picture or words beside the
symbol.
◆Color back : yellow, flame, picture and words : black
 2 
6 F 8 A 0 5 2 1
ContentsPRECAUTIONS (Continued)
SAFETY
For a safe use of the LQ500 Density Meter, take precautions described in this manual and
observe ordinances in making the installation and operation. Toshiba is not responsible for any
accident arising from the use that does not conform to above.
INSTALLATION PRECAUTIONS
Red
DO
WARNING
■The meter is heavy. To move
the meter for relocation or
installation, a qualified operator
must handle it by using
equipment such as a truck, a
crane or a sling.
In addition, when you lift the
meter with its lifting bolts, make
sure the bolts have been
securely tightened to the end.
DO
If any of these work items is
performed incorrectly, this can
cause fire or explosion.
Overturning or dropping can cause
injuries or equipment failure.
■Do not operate where there is
a possibility of leakage of
flammable or explosive gas.
DON’T
Yellow
A fire or explosion can occur.
CAUTION
■Avoid
installing the meter in
any of the following places:
DO
■Electrical work, installation
work are needed for the meter.
Please consult with the sales
agent you purchased the meter,
some of the companies
specialized in this field or your
Toshiba representative.
Otherwise, a fire or equipment
breakdown or failure can occur.
■Install
DO
l Dusty place
l Place where corrosive gases
(SO2, H2S) or flammable gases
may be generated.
l Place exposed to strong vibration
or shock.
l Place exposed to condensation
due to abrupt change in
temperature.
l Place too cold or hot for
installation
l Near an apparatus that generates
strong radio waves or strong
magnetic field.
 3 
the meter in a place
easier for operation,
maintenance and inspection.
In addition, when you place the
meter temporarily in a stocking
area, make sure to execute fall
prevention measures.
Stumbling over the meter or a fall of
the meter can cause injury.
RF section
Detector
Applicator
Cure sheet
Roll-over
prevention
stopper
6 F 8 A 0 5 2 1
SAFETY PRECAUTIONS (Continued)
WIRING PRECAUTIONS
Yellow
WARNING
■Be sure to install a fuse and a
switch to disconnect the
equipment from the power
source.
DO
■Be sure to ground the
equipment using a grounding
wire separate from those used
for power tools.
DO
Failure to observe this can cause
electric shock or equipment failure.
(Grounding resistance: 100 Ω or
less)
Without grounding, electric shock,
malfunction, or equipment failure
can be caused by electric
leakage.
■Make sure that the main
power line is off before wiring or
cabling.
DO
Wiring or cabling without switching
off the main power line can cause
electric shock.
■Use crimp terminals with
insulation sleeves for power
line and grounding wire
terminals.
DO
A disconnected cable or wire from
the terminal or a loose terminal
can cause electric shock or
generate heat and cause a fire or
equipment failure.
■Wiring and cabling should be
done as shown in the wiring and
connection diagrams.
DO
Wrong wiring or cabling can cause
malfunctions, overheating, sparking,
or electric shock.
Yellow
■Do not wire or cable with wet
hands.
DON’T
A wet hand can cause electric
shock.
The label shown left appears near a terminal block on
the equipment to which power is supplied. Take
precautions to avoid electric shock.
Yellow
 4 
6 F 8 A 0 5 2 1
Contents
SAFETY PRECAUTIONS (Continued)
PRECAUTIONS REGARDING MAINTENANCE, INSPECTION,
AND PARTS REPLACEMENT
Yellow
WARNING
DO
■Be sure to set the power
switch on the equipment to the
OFF position before doing
maintenance or inspection
inside the equipment or
replacing its parts.
■Be sure to set the power
switch on the equipment to the
OFF position before replacing
the fuse.
DO
Failure to observe this can cause
electric shock.
Failure to observe this can cause
electric shock or equipment failure.
DON’T
■Do not touch the terminal
block during maintenance or
inspection. If it is necessary to
touch the terminal block, set the
power switch on the equipment
to the OFF position in advance.
■Do not attempt disassemble
or modify the equipment.
DON’T
Failure to observe this can cause
electric shock or equipment
failure.
Failure to observe this can cause
electric shock.
DON’T
■Do not touch the detector
pipe when high temperature
liquid is flowing in the detector
pipe. The detector pipe also
gets hot from the flowing liquid.
Otherwise, a burn can result.
Yellow
Yellow
 5 
The label shown at left is
placed near each
terminal block on the
equipment to which
power is supplied. Be
careful of electric shock.
6 F 8 A 0 5 2 1
SAFETY PRECAUTIONS (Continued)
Limited Applications of the product
• This product is designed and manufactured for use in systems such as general industrial equipment
(food manufacturing line control, various process control, manufacturing line control water treatment
facility and so on). This product is not designed or manufactured for the purpose of applying to the
systems, such as shown below, which require the level of safety that directly concerns with human
life. When your use includes potential applications in those systems, contact Toshiba for consultation.
(Example)
• Main control system for atomic power generating plant/Safety protection system for
nuclear facilities/Other critical safety systems
• Medical control system for sustaining life
• This product is manufactured under strict quality control but components might fail and if this product
is likely to be applied to a system that concerns with human life or it is likely to be applied to a facility
that may cause serious effects, please give special consideration to make the system safe regarding
the operation, maintenance and management of the system.
• This product is not approved as an explosion-proof device. Do not use this product in an area of
explosive atmosphere (explosion protected area).
Liability Exemptions
• Toshiba assumes liability exemptions from the following examples.
• Damages caused by fire, earthquake, actions by third party, other accidents, abuse or
faulty use whether accidental or intentional by the user, or by other uses of abnormal
conditions.
• Damages or losses that are incidental to the us e of or disuse of the product (loss of
business profit, interruption of business operation, etc.)
 6 
6 F 8 A 0 5 2 1
Contents
[NOTE]
Sign
When an explanation is made in the text regarding the Safety Precautions, the [NOTE] sign
shown below appears in the left margin of a page. The [NOTE] gives you directions to follow in
the following instances.
•
•
•
•
To use product correctly and effectively.
To prevent abnormal or degrading performance of the product.
To prevent faulty actions.
To store the product when you do not use the product for a long time.
 7 
6 F 8 A 0 5 2 1
Important Notes of Use of LQ500 Density Meter
Be sure to observe following instructions in order to maintain the original performance of the
LQ500 Density Meter and safely use it over a long period of time.
• Toshiba is not held responsible for any fault or result caused by not observing the precautions
described in this manual or by not observing the laws or regulations in installing or using the product.
[NOTE]
Do not install or store the product in the following places.
Otherwise, meter performance can deteriorate and malfunction, fault, or breakage can
occur.
Place exposed to direct sunlight
Hot, humid place
Place exposed to severe vibration and shock
Place that can be under water
Place of corrosive atmosphere
[NOTE]
Use a separate wire for grounding the meter. Do not share the same
grounding wire with other devices.
Otherwise, malfunction, fault, or breakage can occur.
[NOTE]
Lay the output signal cable through their own conduit away from the AC power
cable and other sources of noise.
Noise can interrupt correct measurement.
[NOTE]
Perform periodic maintenance and inspection.
A long period of reliable measurement requires periodic span calibration
[NOTE]
Be careful not to let water or moisture into the applicator mount of the detector,
converter, or cable ends.
Water or moisture can adversely affect performance and shorten parts service life.
Close the covers and doors securely, and make the cable outlets airtight.
[NOTE]
Turn on power when the meter is installed on metal pipe.
When you install or remove the meter, make sure to turn off power beforehand.
This can affect other equipment due to leakage of radio waves.
[NOTE]
not remove the cover of the applicator mount of the detector as well as the
Important Do
Notes
UseRFof
LQ500
Density
Meter after power is
cover
of the of
detector
section
while the
meter is in operation
applied.
This can affect other equipment due to leakage of radio waves.
[NOTE]
Do not step on any part of the density meter (applicator mount, converter for
example) when you do piping work. Do not place any heavy object on it.
Otherwise, deformation or fault can occur.
 8 
6 F 8 A 0 5 2 1
Contents
[NOTE]
Do not use a transceiver, handy telephone, or other wireless device nearby.
Such a device can adversely affect correct measurement. In the event one must be
used, observe the following precautions.
(1) When using a transceiver, make sure that its output power is 5W or less.
(2) When using a transceiver or a handy telephone, keep the converter and signal
cable at least 30cm away from the antenna.
(3) Do not use a transceiver or a portable telephone nearby while the density meter
is in online operation. This is important to protect if from being affected by a
sudden output power change.
(4) Do not install the fixed antenna of a wireless device in the area around the
converter and signal cable.
[NOTE]
Use a fuse of the specified rating.
A fuse other than that specified can cause density meter malfunction or breakage.
[NOTE]
Do not modify or disassemble the density meter unnecessarily. Do not use
parts other than specified.
Failure can cause malfunction and density meter fault.
[NOTE]
When moving the meter elsewhere for installation, be careful not to drop, hit,
or subject to strong shock.
Otherwise, the density meter may be broken, resulting in malfunction or fault.
[NOTE]
Before returning your meter to Toshiba for repair, etc., make sure to inform us
about the measured matter remaining in the density meter pipe, including
whether it is dangerous or not to touch the material and then clean the meter
so that no measured matter remains in its pipe.
About disposal
[NOTE]
When you dispose of this density meter, follow the ordinance or regulations of
your state.
[FCC notice]
This equipment has been tested and found to comply with the limits for a field disturbance
sensor, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, it may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures.
•
Reorient the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment into an outlet on a circuit different fr6m' that to which the receiver
is connected.
•
Consult the dealer or an experienced radio,'1'V technician for help.
WARNING: This equipment has been certified to comply with the limits for a field disturbance
sensor, pursuant to Subpart C of part 15 FCC rules. Except AC power cable, shielded cables must be
used between the external devices and the terminals of the converter of the equipment.
Changes or modifications made to this equipment, not expressly approved by Toshiba or parties
authorized by Toshiba could void the user's authority to operate the equipment.
 9 
6 F 8 A 0 5 2 1
Contents
SAFETY PRECAUTIONS..........................................................................................................2
[NOTE] SIGN .............................................................................................................................7
IMPORTANT NOTES OF USE OF LQ500 DENSITY METER ..............................................8
OVERVIEW ........................................................................................................................13
1.1
Principle of Measurement................................................................................................. 13
1.2
Features......................................................................................................................... 14
2. UNPACKING .....................................................................................................................15
2.1
Standard Components ..................................................................................................... 15
2.2
Standard Accessories ..................................................................................................... 15
3. INSTALLATION.................................................................................................................16
3.1
Precautions for Installation ............................................................................................... 16
3.2
Installation Location......................................................................................................... 17
3.3
Installation and Piping...................................................................................................... 18
3.4
Precautions for wiring ...................................................................................................... 21
3.5
Wiring ............................................................................................................................ 22
4. PART NAMES AND FUNCTIONS....................................................................................25
4.1
Detector ......................................................................................................................... 25
4.2
Converter........................................................................................................................ 27
5. OPERATION PROCEDURE ............................................................................................29
5.1
Parameter and Set Values ............................................................................................... 29
5.2
Menus and operations ..................................................................................................... 31
5.2.1. Main menu................................................................................................................ 31
5.2.2 Setting keys ............................................................................................................. 32
5.2.3 Menu display............................................................................................................. 33
5.2.4 Monitoring menu display and operating procedures ....................................................... 36
5.2.5. Setting menu display and operating procedures ............................................................ 37
5.2.6 Measuring mode display and operating procedures ....................................................... 38
5.2.7 Reading of parameters display and operating procedures .............................................. 38
5.2.8 Measured values display and operating procedures ....................................................... 41
5.2.9 Self-diagnosis data display operating procedures.......................................................... 41
5.2.10 Parameter setting display and operating procedures ..................................................... 43
5.2.11 Zero calibration display and operating procedures......................................................... 46
5.2.12 Span calibration display and operating procedures........................................................ 46
5.2.13 Phase angle rotation correction display and operating procedures .................................. 47
5.2.14 Linearize/conductity correction display and operating procedures ................................... 48
 10 
6 F 8 A 0 5 2 1
Contents
5.2.15 Additives correction display and operating procedures .................................................. 51
5.2.16 Other menus display and operating procedures ............................................................ 54
6. OPERATIONS...................................................................................................................56
6.1
Procedures for Preparing and Running .............................................................................. 56
6.2
Preparations before Turning on Power ............................................................................... 57
6.3
Power on and Preparations for Measuring.......................................................................... 57
6.3.1 Turning power on....................................................................................................... 57
6.3.2 Verifying and setting measurement conditions ............................................................. 58
6.4
Zero Calibration............................................................................................................... 60
6.5
Span Calibration ............................................................................................................. 62
6.6
Operation ....................................................................................................................... 64
6.7
External Synchronized Operation ..................................................................................... 65
6.7.1 Movement of the external synchronized operation......................................................... 65
6.7.2 Setting the external synchronized operation ................................................................. 66
6.8
Functions Related to Operation ........................................................................................ 67
7. MAINTENANCE ................................................................................................................68
7.1
Precautions for Maintenance, Inspection and Parts Replacement ........................................ 68
7.2
Maintenance and Inspection Items.................................................................................... 69
8. TROUBLESHOOTING.....................................................................................................71
8.1
Troubleshooting .............................................................................................................. 71
8.2
Error Indications and Recovery Operations ........................................................................ 73
9. CORRECTIONS IN DENSITY CALCULATION.............................................................75
9.1
Density Calculation ......................................................................................................... 75
9.2
Various Kinds of Corrections ............................................................................................ 76
9.2.1 Phase angle rotation correction .................................................................................. 76
9.2.2 Fluid temperature correction....................................................................................... 76
9.2.3 RF correction............................................................................................................ 77
9.2.4 Ambient temperature correction.................................................................................. 77
9.3
Phase Angle Rotation Correction (Details)......................................................................... 78
9.3.1 Care point concerning phase angle rotation.................................................................. 78
9.3.2 Phase angle rotation in external synchronized operation................................................ 78
9.3.3 Outline of automatic adjustment function of phase angle rotations ................................. 78
9.3.4 Judgment conditions and adjustments for automatic adjustment of phase angle rotations 78
9.3.5 Restrictions and invalidation in applying the automatic adjustment of phase angle rotations
............................................................................................................................... 79
9.3.6 Invalidation by setting the automatic adjustment of phase angle rotations ...................... 79
9.3.7 Actions after invalidating the automatic adjustment of phase angle rotations .................. 80
9.3.8 Return to the normal through manual input of the phase angle rotations ......................... 81
 11 
6 F 8 A 0 5 2 1
Contents
10. VARIOUS FUNCTIONS ....................................................................................................82
10.1
Various Functions and their Outlines................................................................................. 82
10.2 Moving Average............................................................................................................... 83
10.2.1 Function of moving average........................................................................................ 83
10.2.2 Setting of the moving average times............................................................................ 83
10.2.3 Cautions in using the moving average function ............................................................. 83
10.3 Change-rate limit............................................................................................................. 84
10.3.1 Outline of change-rate limit function ............................................................................ 84
10.3.2 Examples of operating the change-rate limit function .................................................... 84
10.3.3 Cautions in using the change-rate limit factor............................................................... 85
10.3.4 Setting the change-rate limit....................................................................................... 86
10.4 Electric Conductivity Correction ........................................................................................ 87
10.4.1 Standard conductivity correction factors ...................................................................... 87
10.4.2 How to obtain and set a correction factor..................................................................... 88
10.5 Additives Correction Factor .............................................................................................. 92
10.5.1 Additive Correction Function....................................................................................... 92
10.5.2 Density calculation .................................................................................................... 93
10.5.3 Procedures for using the additives correction function................................................... 94
10.5.4 How to set the additives correction function ................................................................. 95
10.5.5 Simplified Correction on Additives ............................................................................... 96
10.6 LINEARIZER SETTING .................................................................................................... 97
10.6.1 Linearizer function ..................................................................................................... 97
10.6.2 Linearizer setting....................................................................................................... 98
10.7 Density Multiplier Switching by External Signals .............................................................. 100
10.7.1 Density multiplier switching function by external signals .............................................. 100
10.7.2 Setting the density multiplier switching by external signals .......................................... 100
11. SPECIFICATIONS...........................................................................................................102
11.1
General Specifications ................................................................................................... 102
11.2
Detector Specifications .................................................................................................. 103
11.3
Conveter Specifications.................................................................................................. 104
11.4
Model Number Table...................................................................................................... 106
APPENDIX..............................................................................................................................107
Attached Figure1. Detector outline dimensions .......................................................................... 107
Attached Figure2. Converter dimensions.................................................................................... 109
 12 
6 F 8 A 0 5 2 1
1 OVERVIEW
The LQ500 Density Meter measures the density of a substance that flows through a pipe by means
of a phase difference method using microwaves.
This method is little affected by the presence of contamination. It uses no moving mechanical parts
or mechanism that is often used in other measuring methods for cleaning, sampling, or defoaming.
It permits continuous measurement.
The density meter, which outputs measured density in electric current, is suitable for an application
in a process for monitoring and controlling.
1.1 Principle of Measurement
This density meter has adopted a new measuring method called “Phase difference method by
microwaves.” When microwaves go through a substance and comes out of it, by measuring the
phase lag of the waves, we get a certain physical property of the substance that is proportional to
the density.
The theory of density measurement based on the phase difference method is shown in Figure 1.1
The difference between the phase lagθ1 of the microwave received through water (density 0%)
and the phase lagθ2 of the microwave received through the object substance, that is,
Δθ ＝ θ2 − θ1
is determined, and since the differenceΔθis in direct proportion to the density, the density of the
object substance is measured.
Phase lagθW
Microwave
transmission
Drinking
water
Reception
ｔ
Density
ｔ
Substance to
be measured
Phase lag θs
ｔ
Phase differenceΔθ
Phase difference Δθ=θＷ−θＳ
ｔ
Density =Ｋ・Δθ(K: Coefficient)
Fig. 1.1 Principle of phase angle difference
 13 
6 F 8 A 0 5 2 1
1.2 Features
Compared with the conventional method, this phase difference measurement method using micro
waves, in principle, has the following features.
(1) Not easily affected by contamination.
This method is measuring the variation of the transmission time but not for measuring the
attenuation of the wave motion strength that has been transmitted into the measured matter.
Therefore, it is unnecessary for the window part for sending/receiving microwaves to be
transparent as the optical type.
(2) This meter is not affected as much as an ultrasonic type is by air bubbles
In an ultrasonic system, measurement is affected by attenuation of wave motion by foreign
matters such as air bubbles but the feature of the microwave method is that measurement is
not easily affected by foreign matters such as air bubbles because the method is not using the
attenuation of wave motion strength.
(3) High liability and simple maintenance.
Having no movable part of the rotating pulp density meter nor the protruding portion into the
pipe as with the blade-type pulp density meter, the new method is free from fiber tangling, thus
realizing a high level of reliability. Requiring no consumable parts such as bearings and pulleys,
the maintenance is also easy and simple.
(4) Not easily affected by the speed of flow.
Taking density measurements captivating the dielectric change following the density change in
the measured matter, this method is not affected by the speed of flow.
(5) Not easily affected by the pulp material type or freeness.
Taking density measurements captivating the dielectric change following the density change in
the measured matter, the new method has the feature of not easily affected by the pulp
material type or freeness, etc.
(6) Being of the flow-through type, the new method is capable of continuous measurement.
As others, the new density meter model LQ500 boasts of the following features.
(7) Can easily change the measurement range.
(8) The operation is simple because complex processings such as density calculation and
correction, etc. are performed automatically by micro computers.
(9) Remote control is made possible by using the hand-held terminal AF100LQ3 type (optional),
which is a specialized terminal for communication.

Density meter LQ500 is equipped with the display/operation consoles as standard.
Therefore, if the meter is installed on a location easy for maintenance, the hand-held
terminal is not always needed.
(10) Measurable up to 50% TS density
(11) Conforming to low-level radio wave equipment
The microwave output of this meter is low with about 10mW and this meter conforms to
“Low-level radio wave equipment” specified by Radio Law. Therefore, the customer is free
to use this meter without applying for permission, notification or licensing of this meter.
 14 
6 F 8 A 0 5 2 1
2. UNPACKING
Check items by the following list and table at unpacking.
2.1 Standard Components
(1) Density Meter
(2) Standard accessories
: 1 unit (One unit each of Detector and Converter,)
: 1 unit (One set of cables,Fuse,Operation manual)

In the event of performing remote control through communications, you are required to have the
hand-held terminal AF100 type (type code: AF100LQ4BAA3, Instruction Manual: 6F8A0763),
which is a specialized terminal for communications. Therefore, please purchase one separately.
2.2 Standard Accessories
Table.2.1
Accessory
Standard accessories
Specifications
Qty
Used to supply DC power from the converter to the RF section
Power supply
cable
(detector)
10m
Overall diameter: 11.0 to 13.0 mm
(32.8ft)
JCS 258 C 2-core CVV-S
Used between the converter and the RF section (detector) to
Communication
cable
communicate with each other.
Overall diameter: 11.0 to 13.0 mm
10m
(32.8ft)
JCS 258 C 4-core CVV-S
２A(Ｔ),250V cartridge, glass tubular fuse,
Fuse
5.2mm outer dia. x 20mm long
Shape/characteristics: 5NM or equivalent (based on JIS C
6575)
Operation manual
(The document you are reading.)
 15 
6 F 8 A 0 5 2 1
3. INSTALLATION
3.1 Precautions for Installation
WARNING
DO
■The meter is heavy. To move
the meter for relocation or
installation, a qualified operator
must handle it by using
equipment such as a truck, a
crane or a sling.
In addition, when you lift the meter
with its lifting bolts, make sure the
bolts have been securely
tightened to the end.
■Do not operate where there is
a possibility of leakage of
flammable or explosive gas.
DON’T
A fire or explosion can occur.
Overturning or dropping can cause
injuries or equipment failure.
CAUTION
■Avoid
installing the meter in
any of the following places:
DON’T
Otherwise, a fire or equipment
breakdown or failure can occur.
DO
l Dusty place
l Place where corrosive gases
(SO2, H2S) or flammable gases
may be generated.
l Place exposed to vibration or
shock that exceeds permissible
level.
l Place exposed to condensation
due to abrupt change in
temperature.
l Place too cold or hot for
installation
l Place too humid for installation
l Near an apparatus that generates
strong radio waves or strong
magnetic field.
Install the meter in a place
easier for operation,
maintenance and inspection.
In addition, when you place the
meter temporarily in a stocking
area, make sure to execute fall
prevention measures.
Stumbling over the meter or a fall
of the meter can cause injury.
RF section
Detector
Applicator
Cure sheet
 16 
Roll-over
prevention
stopper
6 F 8 A 0 5 2 1
3.2 Installation Location
[NOTE]
◆ Determine an indoor installation place in accordance with the following instructions.
(1) Choose a place that is free of vibrations and corrosive gasses, and has ample space for
maintenance.
(2) Secure maintenance space in front, rear and above the density meter. (Refer to fig. 3.2.11)
(3) In the case of outdoor installation, provide covering against sun .
(4) Do not install the meter in a place where there is a possibility of leakage of flammable or
explosive gas.
(5) Do not install the meter in any of the following places:
• A place where condensation due to a sudden temperature change occurs.
• A place where extreme low or high temperatures occur outside the specification range.
• A place near the equipment generating strong radio waves or electric fields.
(6) Make sure the upstream and downstream pipes have enough strength to hold the density
meter. If it is not possible, provide a supporting base to hold the density meter.
(7) Install the meter in a place where density distribution is uniform. If the distribution inside the
pipe is uneven, manual analysis data and the indicated value of the density meter may not
show the same value.
(8) Install the meter in a place where air bubbles are not generated, inside the pipe is always
filled, and sedimentation and accumulation of solid matters do not occur.
(9) The liquid contacting materials of this meter are stainless steel SCS14A(equivalent to
316SS) and polysulfone. Install the meter in a place where measuring liquid or environment
does not corrode these materials.
(10) If the cover of the density meter is removed or the density meter is disassembled while the
meter is powered, radio waves will leak out. (However, the amount is about equal toPHS
and one tenth of mobile phones.)
500
Maintenance
space
600
Converter
600
Back
Convertor
Detector
Front
Maintenance
space
500
600
RF section
500
In addition, provide maintenance
space of 500mm in height above
the RF section and the Converter.
Fig. 3.2.1 Space for Maintenance
 17 
6 F 8 A 0 5 2 1
3.3 Installation and Piping
Figures 3.3.1 through 3.3.4 are examples of density meter installation.
[NOTE]
(1) Install the meter in a place where density distribution is uniform.
(2) Avoid such a location where the measured matter will settle and build up on the bottom of
the density meter.
(3) Avoid such a location which will allow bubbles to move into the pipe line.
(4) We recommend that this density meter should be installed to a vertical piping system.
Horizontal installation can also be used with the same performance but under the following
conditions, vertical installation must be chosen:
(5) Especially in the following situations, make sure that the piping is vertical.
a) Bubbles may stay in the pipe.
b) Slow flow speed or other factors may cause the measured matter to sink or float
substantially making the distribution of the measured-matter density uneven in the pipe.
c) The main pipe has been enlarged thus using the density meter of a diameter greater than
that of the main pipe.
(6) When installing on the horizontal piping, make sure that the meter is installed directly on top
of the converter section for purposes of maintenance and performance assurance (in other
words, so that the paired applicator sections are placed directly side by side).
(7) This density meter does not distinguish between the upstream side and the downstream side.
Neither does it require a straight tube length. Install it in a direction that will make
maintenance easy.
(8) The front side of the density meter's converter section is equipped with an LCD density
display section. When installing the meter, choose a location and direction in which this
density display section will be easily visible. (See Fig. 3.3.3)
(9) When you anticipate a marginal error between the side-to-side dimensions of this density
meter and the installation space of the piping line, prepare a loose mechanism in advance.
(10) To minimize the impact of the bubbles mingled, it is recommended that the meter be installed
on a location as far as possible from the pipe outlet for air release but still within the distance
where a reasonable degree of hydraulic pressure is applied.
(11) In the event that the density meter may no longer be full of the fluid while the pump is shut
down or the density distribution in the density meter may become uneven, make sure to take
measurements only while the pump is operating by using the external interlock function.
(12) Take necessary measures to prevent vibration from a pump or other equipment applied to
the density meter transmitted through the piping.
(13) On both the upstream and downstream sides of the density meter, install shutoff valves.
Furthermore, between these valves and the density meter, install the sampling port, the zero
water supply port, the air release port, the drain port with a shutoff valve attached
respectively. In the event that the flow of the pipe line cannot be stopped, provide a bypass
pipe halfway with a shutoff valve attached. When performing zero point calibration, these
are needed to discharge the measured matter out of the density meter through its drain port
and fill up the meter with fresh water of zero density. (See Fig.3.3.1 and Fig.3.3.2)
(14) As for gaskets to be used in piping, select the one with the dimension conforming to the
flange standard and of the material appropriate for the substance to be measured.
(15) If the cover of the density meter is removed or the density meter is disassembled while the
meter is powered, radio waves will leak out. (However, the amount is about equal to PHS
and one tenth of mobile phones.)
 18 
6 F 8 A 0 5 2 1
[NOTE]
◆Sampling valve:
Used to extract fluids for manual analysis. Install this valve to the side
of the pipe in the case of horizontal installation. It is recommended that
a 1-inch ball valve be installed to the side of the pipe.
◆Zero point water valve: Used to supply drinking water (density or consistency 0%) to the
detector pipe for zero point adjustment. Install this valve at the top of
the pipe in the case of horizontal installation. It is recommended that a
1-inch ball valve be installed in the top of the pipe and zero point water
is supplied through this inlet using a vinyl hose etc.
If valve water pipe is connected to this valve, air cannot be extracted.
Therefore, another valve (vent valve) is needed to extract air.
◆Vent valve:
Used to vent process fluids to open air when performing zero
adjustment. This helps the drinking water (density or consistency 0%)
enter the detector pipe easily. Install this valve in the top of the pipe in
the case of horizontal installation.
◆Drain valve:
Used to drain the fluids before supplying drinking water (density or
consistency 0%) to the detector pipe for zero adjustment. Install this
valve at the lowest point of the pipe. It is recommended that a 1-inch
ball valve be installed at the lowest point of the pipe.
Vent valve
Zero point water valve
Stop valve
Density meter
Stop valve
Sampling valve
Drain valve
Bypass piping
Stop valve
Fig.3.3.1 Meter mounted horizontally
RF section (RF section must stay at the top.)
Wall mounting or
pipe mounting
Detector
Detector
Wall
Base frame
U-bolt
Converter
Applicator (one pair)
This section must be level.
Floor
Fig 3.3.2 Setting example (Horizontally)
Fig 3.3.2 Setting example (from converter side)
 19 
6 F 8 A 0 5 2 1
Stop valve
Stop valve
Air release valve
Zero point water valve
Zero water piping
Density meter
Bypass piping
Drain valve
Drain
Stop valve
Direction of flow Upward
Fig.3.3.4 Meter mounted vertically
[NOTE]
When you lift the meter using a lifting wire for relocation, installation or for other purposes, use
the wire so that the wire does not touch the RF section of the density meter. We recommend
you use a lifting wire of 2m or more in length (A/2 + A/2 shown below). In case the lifting wire
rubs against the RF section, the RF section may be damaged. Care should be taken not to
damage the RF section by applying cure such as cushioning materials between the lifting wire
and the RF section.
A/2
A/2
Lifting wire
RF section
The center of gravity
Figure 3.3.5 Lifting the Density Meter with a Lifting Wire
 20 
6 F 8 A 0 5 2 1
3.4 Precautions for wiring
Yellow
WARNING
■Be sure to install a fuse and a
switch to disconnect the
equipment from the power
source.
DO
■Be sure to ground the
equipment using a grounding
wire separate from those used
for power tools.
DO
Failure to observe this can cause
electric shock or equipment failure.
(Grounding resistance: 100 Ω or
less)
Without grounding, electric shock,
malfunction, or equipment failure
can be caused by electric
leakage.
■Make sure that the main
power line is off before wiring or
cabling.
DO
Wiring or cabling without switching
off the main power line can cause
electric shock.
■Use crimp terminals with
insulation sleeves for power
line and grounding wire
terminals.
DO
A disconnected cable or wire from
the terminal or a loose terminal
can cause electric shock or
generate heat and cause a fire or
equipment failure.
■Wiring and cabling should be
done as shown in the wiring and
connection diagrams.
DO
Wrong wiring or cabling can cause
malfunctions, overheating, sparking,
or electric shock.
Yellow
■Do not wire or cable with wet
hands.
DON’T
A wet hand can cause electric
shock.
The label shown left appears near a terminal block on
the equipment to which power is supplied. Take
precautions to avoid electric shock.
Yellow
 21 
6 F 8 A 0 5 2 1
3.5 Wiring
Figure 3.5.1 on the next page shows connections to the density meter and the external units. Figure
3.5.2 shows wiring assignment to a converter terminal. Refer to these figures for correct wiring.
[IMPORTANT]
(1) A density meter has to be separated from the power supply line when performing the
maintenance and inspection operation. A fuse must be installed on the power supply side to
protect a switch and the power. A power requirement for this unit is approximately 50 VA.
Power consumption of this meter is 24VA (at 100VAC).
(2) Grounding resistance should be 100 Ω or less and the grounding should be made independently
from the one used for power equipment.
(3) To connect between the detector and the converter, use the attached power cable (to supply
DC power supply) and communication cable. Connect these cables by matching the terminal
symbols of the detector RF section’s terminal block (can be seen when the RF section cover
is removed) and the converter’s terminal block with those shown on each cable.
(4) Use power cables of 2 mm2 or more in sectional area and its voltage drop should be 2V
maximum. In addition, use an M4 size crimped terminal for each terminal connections.
(5) Consider wiring when installed so that vibration or sway will not be applied to cables.
(6) Output signal wires should be installed in thick walled steel conduit and separated from AC
power supply, control signal, alarm signal and other wires that may become a source of noise.
(7) Signal wires of the density meter measured value (4-20 mA output) should be a 2-conductor
shielded cable (CVVS 2 mm2) and the grounding of the shield should be made on the receiving
instrument side. When conductivity correction is employed, use the same type of 2-conductor
shielded cable (CVVS 2 mm2) for conductivity signal wires and the grounding of the shield
should be made on the receiving instrument side.
(8) Cable wiring port is airtight with gland and packing; therefore, tighten the cable gland securely
when wiring is completed. Applicable cable sizes are 11 to 13 mm in diameter. If the cable
diameter is smaller than the inside diameter of the gasket, wind tape or something around the
cable until the cable diameter becomes about the size of the inside diameter of the gasket.
(9) Tighten terminal screws securely. Appropriate tightening torque for terminal block screws is
1.2 N•m (1.4 N•m MAX).
(10)Do not apply power when the density meter is not installed properly in the piping system.
Leakage of radio waves may cause interference with other equipment.
 22 
6 F 8 A 0 5 2 1
Ec＋
Conductivity
signal input
(4 ~ 20mADC)
EcFG
RF
section
Converter
CVV
L1
CVVS
Tx＋
Tx＋
Tx-
Tx-
Rx+
Rx+
DI
Rx-
Rx-
COM
SG
FG
Ground (PE)
(Ground resistance: 100Ω or less)
CVV
Density meter error or
maintenance-in-progress contact
output
DO1
FG
FG
CVVS
+24
0V
+24
0V
FG
External sync contact input
(Contact capacity: 24VDC, 1A or more)
COM1
SG
Communication
cable
Power 100 to 240VAC, 50/60Hz
L2
AO+
Measured density output
(4-20mADC, 750Ω or less, isolated
AOCOM2
FG
Power
cable
CVVS
Density correction multiplier switching
voltage input signal
(H: 20-30VDC, L: 2VDC or less, input
resistance about 3kΩ)
DI2
DI3
Note: The FG wires of the dedicated
cables A and B should not be
connected to the FG terminal on the
detector (measuring section) side.
Ground
(Ground resistance: 100Ω or less)
Grounding terminal
Note: The ground should be connected to either the PE
terminal of the terminal bock inside converter or to the
grounding terminal of the case.
Fig. 3.5.1 External connection
Terminal block
+24V
0V
FG
Power supply
T x＋
T x−
NC
Rx+
Rx−
SG
(FG)
(FG)
DI
COM
D01
COM1
DI2
(FG)
COM2
DI3
AO+
L1
Ｌ２
AO−
Communication
External sync input DI, Density meter error or
AO (+, −)
COM
maintenance-in-progress Multiplier switching: 4-20mA
DI2, DI3, COM2
signal: DO1, COM1
Density output
(HART)
Fig. 3.6 Terminals inside the converter
 23 
AC Power
6 F 8 A 0 5 2 1
Terminal block
+24V
0V
FG
Power supply
T x＋
T x−
FG
Rx+
Rx−
SG
Communication
EC＋
EC−
NC
FG
Conductivity signal input
(4 ~ 20 mADC)
Figure3.5.3 Terminals arrangement inside the RF section
[NOTE]
For connection between the converter and the RF section, connect cables according to
the band marks attached to the power cable (1) and the communication cable (2).
Erroneous connection can cause a failure or an erroneous operation.
[NOTE]
For connection between the converter and the RF section, make sure to use the attached
power cable (1) and communication cable (2). Using other cables can cause an erroneous
operation.
 24 
6 F 8 A 0 5 2 1
4. PART NAMES AND FUNCTIONS
The detector is integrated with the converter in LQ500 Density meter.
4.1 Detector
Detector
RF section
(2) Applicator section
(3) Temperature detector
Fig.4.1.1 Detector
 25 
(1) Main pipe
6 F 8 A 0 5 2 1
(1)
Main pipe
Refers to the part connected to the pipe line of a measured object. FLANGE is JIS 10K or
equivalent. Contact Toshiba for connections other than this method (shown left).
(2)
Applicator mount
The applicators (antenna) for transmitting and receiving microwaves are built inside. The
applicator on the front in Fig.4.1 is for transmitting and the rear is for receiving. Always keep
the lids closed and the screws of the lids secured.
(3)
Temperature detector
The temperature detector (RTD) is for temperature correction. It measures temperature of the
fluid flowing through the main pipe.
(4)
RF section
This is the section that generates and detects microwaves and also performs signal processing.
Do not open the case cover or loosen the bolts of the cover.
 26 
6 F 8 A 0 5 2 1
4.2 Converter
Figure 4.2 shows the converter with its door open.
(3) [POWER]
indicator
(4) [MEASURE]
indicator
(5) [ALARM]
indicator
(6) LCD indicator
(7) Setting keys
(1) Power switch
FUSE
2A(T)
250V
(8) Terminal block
(9) Cable gland
 27 
(2) Fuse
FUSE
2A(T )
250V
6 F 8 A 0 5 2 1
[NOTE]
Install the converter cover when operating the density meter. In addition, tighten securely
the screws of the converter cover. If screws are not tightened enough, moisture, dust or
other particles enters the converter and can cause a converter failure.
(1)
[POWER] switch
The power switch for the density meter.
(2)
[Fuse]
2A(T), 250V glass tube fuse is inside.
(3)
[POWER] Indicator (Green LED)
Green LED lights when AC power turns on by the power switch.
(4)
[MEASURE] Indicator (Green LED)
The indicator lights when measuring, and turns off when setting and when measuring stops at
externally synchronized operation.
(5)
[ALARM] Indicator (Red LED)
Lights on error signal from the meter.
(6)
LCD indicator
Displays measured values, set values and self-diagnosis data, etc. Being an indicator of 20
characters by 4 lines, it displays numerical values, alphanumeric characters and symbols in
accordance with needs.
(7)
Setting keys
These keys are used for switching between display contents of the LCD indicator or setting
various set values. They include the [ESC] key, the [→] key, the [UP] key, [DN] key and the
[SET] key.
(8)
Terminal block
Refers to the terminal block connecting cables for external connection.
(9)
Cable glands
Six cable glands are available for introducing cables for external connection, such as power
supplies and output signals.
 28 
6 F 8 A 0 5 2 1
5. OPERATION PROCEDURE
5.1 Parameter and Set Values
The set values and setting ranges by parameter at the time of factory shipment are listed in Table
5.1.1 below.
Table 5.1.1 Parameters and Set Values (No.1)
Measurement Condition Parameter
Density multiplier (C)
Unit
―
Ex-factory Set Value
Setting Range
1.000 (Standard value)
0.00 ∼ 9.99
Upper density
measurement range (UR)
％TS
Value specified in your order
1.0 ∼ 99.9
Lower density
measurement range (LR)
％TS
Value specified in your order
0.0 ∼ 99.5
Density line slope (a)
%TS per degree
Density intercept (b)
％TS
Density test output
during setting mode (ot)
％TS
Value in Table 5.1.2 for each
- 0.2000 ∼ 0.2000
aperture
- 99.99 ∼ 99.99
0.00 (Standard value)
50% density of FS (Provisional
value)
0.0 ∼ 99.9
Delayed time in external synchronized
operation (dt)
Minute
0.5 (Provisional value)
0.1 ∼ 99.9
Zero-point phase θ1 (zp)
Degree
Value at the time
of factory adjustment
0.00 ∼ 359.99
Zero-point fluid temperature T0 (zT)
℃
Value at the time
of factory adjustment
0.00 ∼ 100.00
RF correction factor (cG)
−
Value at the time
of factory adjustment
-9.99 ∼ 9.99
Zero-point RF data (zG)
−
Value at the time
of factory adjustment
0.00 ∼ 100.00
Moving average times (ma)
Permissible width of change-rate limit
(dx)
Limit times of change-rate limit (HL)
Time
1 (Without moving averaging)
%TS
0.00 (NONE)
−
0 (Without change-rate limit )
1 ∼ 99
0.00∼9.99
0∼99
Upper angle of angle
rotation correction (UH)
Degree
260
240∼360
Upper angle of angle
rotation correction (SH)
Degree
100
0∼120
Linearizer density A (LA)
%TS
0.60 (Provisional value)
0.00∼99.99
Linearizer density B (LB)
1.00 (Provisional value)
0.00∼99.99
Linearizer inclination (K1)
%TS
−
1.00 (Without linearization)
0.00∼9.99
Linearizer inclination (K2)
−
1.00 (Without linearization)
0.00∼9.99
Linearizer inclination (K3)
−
1.00 (Without linearization)
0.00∼9.99
Electric conductivity correction factor
γ(r)
Zero-point electric conductivity Eo (zE)
Degree
(per mS/cm)
Measured object electric conductivity (EC)
00 (Without electric conductivity
correction)
0.00 ∼ 99.99
mS / cm
0.00
0.00 ∼10.00
mS / cm
0.00
0.00 ∼10.00
 29 
6 F 8 A 0 5 2 1
Table 5.1.1 Parameters and Set Values (No.2)
Unit
Ex-factory Set
Values
Setting Range
−
No (Without loading
material correction)
OFF / ON
−
Total
TOTAL / MAIN
−
Total
TOTAL / MAIN
−
Main-object sensitivity (sO)
−
1.00
−9.99∼9.99
Additives sensitivity (s1)
Additives sensitivity (s2)
Additives sensitivity (s3)
Additives sensitivity (s4)
Additives sensitivity (s5)
Loading additive ratio (R1)
Loading additive ratio (R2)
Loading additive ratio (R3)
Loading additive ratio (R4)
Loading additive ratio (R5)
Output at contact OFF in external
synchronized operation (ho)
Availability of density multiplier
switching (D1)
Density multiplier at DI (C2)
Density multiplier at DI (C3)
Density multiplier at DI (C4)
Availability of automatic
adjustment of angle rotation (NA)
Switching between continuous
operation and external
synchronized operation (OP)
−
0.00
−9.99∼9.99
−
0.00
−9.99∼9.99
−
0.00
−9.99∼9.99
−
0.00
−9.99∼9.99
−
0.00
−9.99∼9.99
−
0.000
0.000∼1.999
−
0.000
0.000∼1.999
−
0.000
0.000∼1.999
−
0.000
0.000∼1.999
−
0.000
0.000∼1.999
−
4mA
Value immediately before 4mA ;
simulated output in setting mode
−
OFF（NONE）
−
1.000
0.000∼9.999
−
1.000
0.000∼9.999
−
1.000
0.000∼9.999
−
ON
−
CONT
Measurement Condition Parameter
Availability of additives correction
(AF)
Display density type of
additives correction (Ad)
Output density type of
additives correction (Ac)
Parameter set No. of
additives correction (Ap)
1∼10
ON / OFF
ON / OFF
CONT (Continuous) /
EXT(External)
Note : The expression "without ..." has been used in several places in Table 5.1.1 to mean that the
respective numeric values in the table above are set to invalidate their functions.
Table 5.1.2 Density line slope (a)
meter size
(mm)
50
80
100
150
200
250
300
 30 
0.168
0.105
0.084
0.056
0.042
0.034
0.028
6 F 8 A 0 5 2 1
5.2 Menus and operations
Operations should be done with five keys for setting, in combination with the LCD display.
This section shows menus and operations.
5.2.1.
Main menu
Main menu is composed of three basic menus shown below. Table 5.2.1 shows the functions of
each menu and performances when selected.

1 : MONITORING MENU
2 : SETTING MENU
3 : MEASURING MODE
Table 5.2.1 Functions and performances of main menu
1 ：MONITORING MENU
2 ：SETTING MENU
Reading of each
measuring conditions
(parameters), measured
values, and self-diagnosis
data
Changing of each
measuring conditions
(parameters), zero
calibration and span
calibration
Measured density
Output (4 ~ 20mA)
LCD Density
display
Measured density
continuous output
Density Test output
Measured density value
Density Test output
Measured density valve
[Measure] indicator
On
Off
On
Functions
3 ：MEASURING MODE
Mode selection from among
two measuring modes
(operation modes) of the
normal continuous operation
and the externally
synchronized operation
Measured density continuous
output
Note: “Measured density value”is output instead of “Density Test output” as the LCD density display
on the panel when “Zero calibration” or “Span calibration” is selected in the setting menu. This
arrangement is intended to compare the measured density values before and after the
calibration for both Zero and Span calibrations. As to the measured density output (4−20 mA),
“Density Test output” is used for all menu items including Zero calibration and Span calibration.
 31 
6 F 8 A 0 5 2 1
5.2.2
Setting keys
Five setting keys are available. The basic methods for using them are described in Table 5.2.2. For
specification information, please refer to their respective operating procedures.
Table 5.2.2 Basic Methods for Using Operation Keys
Setting
Key
Notation in
Operation Manual
Basic Use
Returns to the menu screen that is one level higher.
ESC
[ESC]
[→]
On the set value change screen, use this key to clear the setup change
before returning to the previous screen.
On the menu list screen, use this key to move the cursor under the menu
number to the location of the next number.
In the state of setting numerical values, press this key each time the
cursor has to be shifted rightwards by a digit's worth. If the cursor is
located rightmost, the cursor is shifted to the leftmost digit.
In the event of entering the setting menu, press the [SET] key to display
the message saying that the output will be switched to the simulated
value. After making sure that no problem is present, press the [→] key to
enter the setting menu. This procedure is taken for the purpose of
preventing the output from being switched to the simulated value as a
result of mistakenly pressing the [SET] key twice in a row.
On the menu screen, use this key to switch to the next menu screen.
UP
[UP]
In the state of setting numerical values, use this key to move up the
numeric value of the digit where the cursor is located. Each time the key
is pressed, the numeric value changes incrementally, as following; "0",
"1", "2", ････, "9", "-"(minus symbol), "."(decimal point), "0", "1",
"2", ････.
Note: If the numerical value does not belong to the leftmost digit, "-"
(minus symbol) will not appear after 9.
In the event of selecting an item from multiple items (such as ON/OFF),
the cursor (of the selected item) is switched each time this key is
pressed.
On the menu screen, use this key to switch to the previous menu screen.
DN
[DN]
In the state of setting numerical values, use this key to move down the
numerical value of the digit where the cursor is located. Each time the
key is pressed, the numerical value changes detrimentally , as following;
"0", "."(decimal point), "-"(minus symbol), "9", "8", ････ "1", "0".
Note: If the numerical value does not belong to the leftmost digit, "-"
(minus symbol) will not appear after "."(decimal point).
In the event of selecting an item from multiple items (such as ON/OFF),
the cursor (of the selected item) is switched each time this key is
pressed.
SET
[SET]
Use this key to select the menu number where the cursor is located or
confirm the set value.
 32 
6 F 8 A 0 5 2 1
5.2.3
Menu display
The menu display of the converter LCD display section has a hierarchical structure as shown in
Table 5.2.3.
Note: Occasionally using some abbreviated terms as well, actual LCD displays differ from Table
5.2.3. For details, refer to Section 5.2.4. The symbols in parentheses in Table 5.2.3
correspond to those displayed on the upper left corner of their respective LCD screens.
Table 5.2.3 Menu Display (1)
Menu 1
Menu 2
Monitorin Read
parameters
menu
Menu 3
Menu 4
Density multiplier (C)
Upper density measurement range (UR)
Lower density measurement range (LR)
Density line slope (a)
Density intercept (b)
Density test output(ot)
Delayed time in external synchronized operation
(dt)
Zero-point phase θ1 (zp)
Zero-point fluid temperature T0 (zT)
RF correction factor (cG)
Zero-point RF data (zG)
Moving average times (ma)
Permissible width of change-rate limit (dx)
Limit times of change-rate limit (HL)
Measured value Phase θ2(p), fluid temperature (T),
ambient temperature (A), density (X)
Self-diagnosis Operation status (ST)
data
Microwave signal level (SL)
Micro wave factor (F)
RF data(G)
+5V power supply voltage(J)
Reference phase error (pd)
Memory check (Mc)
 33 
6 F 8 A 0 5 2 1
Table 5.2.3 Menu Display (2)
Menu 1
Setting
menu
Menu 2
Parameter
setting
Menu 3
Upper density measurement range
(UR)
Lower density measurement range
(LR)
Density line slope (a)
Density intercept (b)
Density test output (ot)
Delayed time in external synchronized
operation (dt)
Zero-point phase θ1 (zp)
Zero-point fluid temperature T0 (zT)
RF correction factor (cG)
Zero-point RF data (zG)
Moving average times (ma)
Permissible width of change-rate limit
(dX)
Menu 4
Setting the upper density measurement range
(UR)
Setting the lower d ensity measurement range (LR)
Setting the density line slope (a)
Setting the density intercept (b)
Setting the density test output (ot)
Setting the delayed time in external synchronized
operation (dt)
Setting the zero-point phase θ1 (zp)
Setting the zero-point fluid temperature T0 (zT)
Setting the RF correction factor (cG)
Setting the zero-point RF data(zG)
Setting the Moving average times (ma)
Setting the permissible width of change-rate limit
(dX)
Setting the permissible times of change-rate limit
Limit times of change-rate limit (HL)
(HL)
Zero calib. Zero calibration
Zero calibration implementation verification
Span calib. Density multiplier (C1)
Setting the density multiplier (C1)
Angle
Upper angle (UH)
Setting the upper angle (UH)
rotation
Lower angle (SH)
Setting the lower angle (SH)
correction
Angle rotation (N)
Setting the angle rotation (N)
Linearizer / Linearizer density A (LA)
Setting the linearizer density A (LA)
electric
Linearizer density B (LB)
Setting the linearizer density B (LB)
conductivity Linearizer line slope (K1)
Setting the linearizer line slope (K1)
correction
Linearizer line slope (K2)
Setting the linearizer line slope (K2)
Linearizer line slope (K3)
Setting the linearizer line slope (K3)
Electric conductivity correction factor
Setting the electric conductivity correction factor
γ(r)
γ(r)
Zero-point electric conductivity E0 (zE) Setting the zero-point electric conductivity E0 (zE)
Measured object electric conductivity
Setting the measured object electric conductivity
(EC)
(EC)
 34 
6 F 8 A 0 5 2 1
Table 5.2.3 Menu Display (3)
Menu 1
Setting
menu
Menu 2
Additives
correction
Others
Measurin
g mode
Continuous
operation
and external
synchronized
operation
(OP)
Menu 3
Menu 4
Availability of additives correction
Selecting the availability of additives correction
(AF)
(AF)
Display density type (Ad)
Selecting the display density type (Ad)
Output density type (Ac)
Displaying the output density type (Ac)
Parameter set No. (Ap)
Setting parameter set No. (Ap)
Main-object sensitivity (s0)
Setting the main-object sensitivity (s0)
Additives sensitivity (s1)
Setting the additives sensitivity (s1)
Additives sensitivity (s2)
Setting the additives sensitivity (s2)
Additives sensitivity (s3)
Setting the additives sensitivity (s3)
Additives sensitivity (s4)
Setting the additives sensitivity (s4)
Additives sensitivity (s5)
Setting the additives sensitivity (s5)
Loading additive ratio (R1)
Setting the loading additive ratio (R1)
Loading additive ratio (R2)
Setting the loading additive ratio (R2)
Loading additive ratio (R3)
Setting the loading additive ratio (R3)
Loading additive ratio (R4)
Setting the loading additive ratio (R4)
Loading additive ratio (R5)
Setting the loading additive ratio (R5)
Output at contact OFF in external
Selecting the output at contact OFF in external
synchronized operation(ho)
synchronized operation (ho)
Availability of density multiplier
Selecting the availability of density multiplier
switching (D1)
switching (D1)
Density multiplier at DI (C2)
Setting the density multiplier at DI (C2)
Density multiplier at DI (C3)
Setting the density multiplier at DI (C3)
Density multiplier at DI (C4)
Setting the density multiplier at DI (C4)
Availability
of
automatic Selecting the availability of automatic
adjustment of angle rotation (NA)
adjustment of angle rotation (NA)
Switching between continuous
operation and external
synchronized operation (OP)
 35 
6 F 8 A 0 5 2 1
5.2.4
Monitoring menu display and operating procedures
1 ：MONITORING MENU
2 ：SETTING MENU
3 ：MEASURING MODE
[ESC]
(Previous
Menu)
Move the cursor to "1" with [→] key, and
press [SET] key.
1 ：READ PARAMETERS
2 ：MEASURED VALUES
3 ：SELF-DIAGNOSIS
Note： In actual display, the cursor is
blinking.
Move the cursor to the menu
number with [→] key, and
press [SET] key.
Menus of
「1 ：READ PARAMETERS」
[ESC]
(Previous
Menu)
Data display of
「2：MEASURED VALUES」
Data display of
「3：SELF-DIAGNOSIS」
 36 
6 F 8 A 0 5 2 1
5.2.5.
Setting menu display and operating procedures
1 ：MONITORING MENU
2 ：SETTING MENU
3 ：MEASURING MODE
[ESC]
(Previous
Menu)
Move the cursor to "2" with [→] key, and press [SET] key.
Test output will be
valid.
[→] : CONTINUE
[ESC]: CANCEL
When [2: SETTING MENU] is selected, the density output
signal and the density display are hold in the simulated
values that have been set. This warning screen will
appear once before getting into [2: SETTING MENU].
After making sure that there is no problem, press the [→]
key to get into [2: SETTING MENU].
Press the [→] key to get into [2: SETTING MENU].
Input password
[ESC]
(Previous
Menu)
PASSWORD
:0000
[SET]SET,[ESC]CANCEL
To get into [2: SETTING MENU], it is necessary to further
enter the password "8000". In the initial condition, the cursor
is on the forth digit. Therefore, press [DN] key 4 times to set to
"8" and press the [SET] key to get into [2: SETTING MENU]. An
incorrect password will cause the following message to
appear. Return to the screen at left by pressing any key and
then enter the correct password once again.
PASSWORD ERROR
PUSH ANY KEY.
[ESC]
(Previous
Menu)
5:SET PARAMETERS
6:ZERO CALIBRATION
7:SPAN CALIBRATION
8:ANGLE ROTATION
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
9:LINEARIZ/CNDUCTVTY
10:ADDITIVES CORRECT
11:OTHERS
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
Move the cursor to the menu number with
[→] key, and press [SET] key.
[UP]
(Next menu)
[UP]
(Next menu)
1 ：READ PARAMETERS
2 ：MEASURED VALUES
3 ：SELF-DIAGNOSIS
 37 
6 F 8 A 0 5 2 1
5.2.6
Measuring mode display and operating procedures
1 ：MONITORING MENU
2 ：SETTING MENU
3 ：MEASURING MODE
Move the cursor to "3" with [→] key, and press [SET] key.
[ESC]
(Previous
Menu)
OP：MEASURING MODE
DATA：CONT
[SET] CHANGE
[ESC] RETURN
Press the SET key to set.
Press the SET key to confirm.
Press the ESC key to cancel.
OP:MEASURING MODE
RANGE :CONT/EXT
DATA :CONT
[SET] SET,[ESC]CANCEL
Each time the ﾟ[UP] or [DN] key is pressed, CONT/EXT are
mutually alternated thus making it possible to select an operation
mode. Select "CONT" for normal continuous operations; select
"EXT" for external synchronized operations. For details on the
external synchronized operation, refer to Section 6.7.
5.2.7
Reading of parameters display and operating procedures
1 ：READ PARAMETERS
2 ：MEASURED VALUES
3 ：SELF-DIAGNOSIS
Move the cursor to "1" with [→] key, and press [SET] key,
and select [1 : READ PARAMETERS]
C：DENSITY MULTIPLIER
DATA：1.000(C1)
[ESC]
(Previous
Menu)
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
UR:UPPER RANGE
DATA：3.0
The set value of the upper density measurement range
(the density whose current output is 20mA) can be verified.
[ESC] RETURN
[DN]
(Pre. menu)
[UP]
(Next menu)
LR:LOWER RANGE
DATA：0.0
[ESC]
(Previous
Menu)
The set value of the density multiplier C, which is used for
density calculation, can be verified. If C2, C3 or C4 is
displayed in the parentheses, it indicates that the density
multiplier switched to by the external voltage signal (DI) is
selected.
The set value of the lower density measurement range
(the density whose current output is 4mA) can be verified.
[ESC] RETURN
[UP]
(Next menu)
 38 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
a：DENSITY LINE SLOPE
DATA：0.0840
[ESC] RETURN
[DN]
(Pre. menu)
[UP]
(Next menu)
b：DENSITY INTERCEPT
DATA：0.0
[ESC]
(Previous
Menu)
[ESC] RETURN
[DN]
(Pre. menu)
[ESC] RETURN
[DN]
(Pre. menu)
[ESC] RETURN
[DN]
(Pre. menu)
[ESC] RETURN
[DN]
(Pre. menu)
The phase at the time of zero calibration can be
verified.
[UP]
(Next menu)
zT:ZERO WATER TEMP.
DATA：25.00
[ESC]
(Previous
Menu)
In external synchronized operations, the set value
of the delayed time (unit: minute) from when the
external contact input is turned ON until the
measurement starts can be verified. For details,
refer to Section 6.7.
[UP]
(Next menu)
zp:ZERO POINT PHASE
DATA：80.00
[ESC]
(Previous
Menu)
Upon getting into [2: SETTING MENU], the current
output and the LED density display are switched to
simulated values. In this screen, the set value of the
simulated value (unit: %TS) can be verified.
[UP]
(Next menu)
dt：DELAYED SYNC.TIME
DATA：0.5
[ESC]
(Previous
Menu)
The set value of "density intercept" of the arithmetic
expression for calculating the density from the
phase measurement d ata, etc. can be verified.
Normally, this is set to zero.
[UP]
(Next menu)
ot：DENSTY TEST OUT
DATA：1.5
[ESC]
(Previous
Menu)
The set value of "density line slope" of the
arithmetic expression for calculating the density
from the phase measurement data, etc. can be
verified.
The fluid temperature at the time of zero calibration can
be verified.
[ESC] RETURN
[UP]
(Next menu)
 39 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
cG:RF COEF.
[ESC]
(Previous
Menu)
DATA:0.00
[ESC] RETURN
[DN]
(Pre. menu)
The set value of the RF correction factor used for density
calculation can be verified. Before shipment, this value is
already set in accordance with the product's characteristics in
the shipping test. If you change this value, it will affect the
performance; therefore, normally, do not change it.
[UP]
(Next menu)
zG:ZERO RF DATA
DATA:50.00
[ESC]
(Previous
Menu)
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
ma：AVERAGING TIMES
DATA：1
The set value of the moving average times can be verified.
[ESC] RETURN
[DN]
(Pre. menu)
[UP]
(Next menu)
dx: CHANGE-RATE LIMIT
DATA：0.00
[ESC]
(Previous
Menu)
The times permitted in the change-rate limit function can be
verified.
[ESC] RETURN
[UP]
(Next menu)
OI：OUTPUT INTERVAL
DATA：HART 0s
Which type of communication method is selected, HART
communication*1 or RS232C communication*2, can be checked
and also the output interval can be checked.
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
HL:LIMIT TIMES
DATA：0
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
The variation width (%TS) permitted in the change-rate limit
function can be verified.
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
The RF data at the time of zero calibration can be verified.
[UP]
(Next menu)
C：DENSITY MULTIPLIER
DATA：1.000
[ESC] RETURN
Note *1: HART protocol is set when the density meter is shipped from
the factory. In addition, 0 second appears as its output interval.
This is because the output for HART communication is
requested by the nature of this protocol from a super-ordinate
device such as the hand-held terminal AF100 and the output
interval has no meaning.
Note *2: RS232C can be used by adding the data save function.
For how to switch the communication method and how to set
the output interval, refer to the LQ600 Data Save Function
 40 
6 F 8 A 0 5 2 1
5.2.8
Measured values display and operating procedures
1 ：READ PARAMETERS
2 ：MEASURED VALUES
3 ：SELF-DIAGNOSIS
[ESC]
(Previous
Menu)
Move the cursor to "2" with [→] key, and press [SET] key to
select [ 2:MEASURED VALUES]
MEASURED
p PHASE:
T TEMP:
X DENSITY:
5.2.9
VALUES *
123.56 N=0
30.00 °C
2.34
%TS
It is possible to verify the measured phase value (and
the angle rotation N), the measured fluid temperature
value, as well as the density calculated based on them.
[*] in the upper right corner will blink synchronously with
the data updating thus making it possible to verify that
the data updating is definitely taking place.
Self-diagnosis data display operating procedures
1 ：READ PARAMETERS
2 ：MEASURED VALUES
3 ：SELF-DIAGNOSIS
Move the cursor to "3" with [→] key,
and press [SET] key to select [3:SELF-DIAGNOSIS]
ST:STATUS :GOOD
[ESC]
(Previous
Menu)
[ESC] RETURN
[DN]
(Pre. menu)
[UP]
(Next menu)
SL:MICROWAVE SIG.LVL
DATA :−53 dBm
[ESC]
(Previous
Menu)
Whether the phase m easurement operation is
normally functioning or not can be verified.
The micro wave receive signal level can be
verified. Normally, the level is -45 to -75. (dBm)
[ESC] RETURN
[UP]
(Next menu)
 41 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
F:MICROWAVE COEF.
DATA : 1910
[ESC]
(Previous
Menu)
[ESC] RETURN
[DN]
(Pre. menu)
[UP]
(Next menu)
G:RF DATA.
DATA : 50.00
[ESC]
(Previous
Menu)
[UP]
(Next menu)
J:+5V POWER SUPPLY
DATA :5.00
[UP]
(Next menu)
pd:REF PHASE
DATA：0.0
The soundness of the phase measurement unit
can be verified.
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
The voltage of the 5-volt power supply can be
checked.
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
The converter's RF data (concerning the micro
wave phase measurement) can be verified.
Normally, the value is 10 to 70.
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
The micro wave signal constant can be verified.
Normally, the value is 1825 to 1975.
[UP]
(Next menu)
Mc:MEMORY CHECK:GOOD
EPROM :GOOD
RAM
:GOOD
EEPROM :GOOD
[DN]
(Pre. menu)
The soundness of various memory units can be
verified.
[UP]
(Next menu)
ST:STATUS :GOOD
[ESC]
(Previous
Menu)
[ESC] : RETURN
 42 
6 F 8 A 0 5 2 1
5.2.10
Parameter setting display and operating procedures
5:SET PARAMETERS
6:ZERO CALIBRATION
7:SPAN CALIBRATION
8:ANGLE ROTATION
Move the cursor to "5" with [→] key, and press [SET] key to select[ 5:SET PARAMETERS]
[ESC]
(Previous
Menu)
UR:UPPER RANGE
DATA：3.0
[SET] CHANGE
[ESC] RETURN.
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
b:DENSITY INTERCEPT
DATA：0.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC](Cancel)
[UP]
(Next menu)
ot:DENSTY TEST OUT.
DATA：1.5
[SET] CHANGE
[ESC] RETURN
[UP]
(Next menu)
UR:UPPER RANGE
RANGE :1.0-99.9 %TS
DATA : 0.30
[SET] SET,[ESC] CANCEL
The upper density measurement range
(whose current output is 20mA) is set.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
LR:LOWER RANGE
RANGE :0.0-99.5 %TS
DATA :00.0
[SET] SET,[ESC] CANCEL
The lower density measurement range
(whose current output is 4mA) is set.
[UP]
(Next menu)
a:DENSITY LINE SLOPE
DATA：0.0840
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Fix)
[UP]
(Next menu)
LR:LOWER RANGE
DATA：0.0
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Set)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
a:DENSITY LINE SLOPE
RANGE :−0.2000−0.2000
DATA : 0.0840
[SET] SET,[ESC] CANCEL
The "density line slope" of the arithmetic expression for
calculating the density from the phase measurement data, etc. is
set. Before shipping, this is s et in accordance with the aperture,
based on Table 5.1.2. Normally, do not change the setting.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
b:DENSITY INTERCEPT
RANGE :−99.99−99.99
DATA : 00.00
[SET] SET,[ESC] CANCEL
The "density intercept" of the arithmetic expression for calculating
the density from the phase measurement data, etc. is set. In the
event that the zero point is out of position, it is corrected through
zero calibration; it is also possible to shift the zero point by
changing this coefficient. Normally, set the value to zero.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
ot:DENSTY TEST OUT.
RANGE :0.0-99.9 %TS
DATA : 01.5
[SET] SET,[ESC] CANCEL
When [2: SETTING MENU] is selected, the density output
signal and the density display are hold in the simulated values
that have been set. In this screen, the simulated values are
set in terms of "%TS".
 43 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
dt:DELAYED SYNC.TIME
DATA：0.5
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
zp:ZERO POINT PHASE
DATA：80.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
zT:ZERO WATER TEMP
DATA：25.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
[UP]
(Next menu)
cG:RF COEF.
DATA：0.00
[SET] CHANGE
[ESC] RETURN
[UP]
(Next menu)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
dt:DELAYED SYNC.TIME
RANGE :0.1-99.9 min
DATA : 00.5
[SET] SET,[ESC] CANCEL
In external synchronized operations, the delayed time from when the
external contact input is turned ON until the measurement starts is set.
For details, refer to Section 6.7.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
zp:ZERO POINT PHASE
RANGE :0.00-359.99
DATA : 080.00
[SET] SET,[ESC] CANCEL
The zero-point phase can be set in this menu through
manual input. Normally, the zero-point phase is
automatically set when implementing the zero calibration.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
zT:WATER TEMP./ZERO
RANGE :0.00-100.00 (C
DATA : 025.00
[SET] SET,[ESC] CANCEL
The zero-point fluid temperature can be set in this menu
through manual input. Normally, the zero-point fluid
temperature is automatically set when implementing the zero
calibration.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
cG:RF COEF.
RANGE : -9.99-9.99
DATA: 0.00
[SET] SET,[ESC] CANCEL
The RF correction factor used for density calculation is set.
Before shipment, this value is already set in accordance with
the product's characteristics in the shipping test. If you
change this value, it will affect the performance; therefore,
normally, do not change it.
 44 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
zG:ZERO RF DATA
DATA：50.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
ma:AVERAGING TIMES
DATA：1
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
dx:CHANGE RATE LIMIT
DATA：0.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
[UP]
(Next menu)
HL:LIMIT TIMES
DATA：0
[SET] CHANGE
[ESC] RETURN
[DN]
[UP]
(Pre. menu)
(Next menu)
UR:UPPER RANGE
DATA：3.0
[ESC]
[SET] CHANGE
(Previous
[ESC] RETURN
Menu)
zG:ZERO RF DATA
RANGE :0.00-100.00 (C
DATA: 050.00
[SET] SET,[ESC] CANCEL
[SET](Set)
[SET](Fix)
[ESC](Cancel)
The zero-point RF data can be set in this menu through
manual input. Normally, the zero-point RF constant is
automatically set when implementing the zero calibration.
ma:AVERAGING TIMES
RANGE : 1-99
DATA : 01
[SET] SET,[ESC] CANCEL
[SET](Set)
[SET](Fix)
[ESC](Cancel)
The moving average times are set. If the output averaged for
density control, etc. is needed, the value from 5 to about 10 is
set.
dx:CHANGE RATE LIMIT
RANGE :0.00-9.99 °
DATA: 0.00
[SET] SET,[ESC] CANCEL
[SET](Set)
[SET](Fix)
[ESC](Cancel)
If there is a signal of sharp variation, the change-rate limit function
excludes this signal to restrict a sudden output variation. In this
menu, the permissible variation width is set in terms of "%TS".
[SET](Set)
[SET](Fix)
[ESC](Cancel)
HL:LIMIT TIMES
RANGE :0-99
DATA: 00
[SET] SET,[ESC] CANCEL
The limit times in the change-rate limit function are set. If the
variation width exceeds dx(%TS) that was set in the previous
menu, the signal is excluded for up to the HL times that are set in
this menu. At HL=0, the change-rate limit function does not work.
[SET](Set)
[DN]
[NOTE]：For all menus, when data outside the allowed range is
VALUE OUT OF RANGE
input, the error message is displayed, and the wrong data is UR:UPPER RANGE
refused. Press any key to return, and input adequate data. PRESS ANY KEY TO
RETURN
 45 
6 F 8 A 0 5 2 1
5.2.11
Zero calibration display and operating procedures
5:SET PARAMETERS
6:ZERO CALIBRATION
7:SPAN CALIBRATION
8:ANGLE ROTATION
Move the cursor to "6" with [→] key, and press [SET] key to select [6:ZERO CALIBRATION]
[ESC]
(Previous
Menu)
ZERO CAL
p PHASE:
T TEMP.:
X DENSITY:
＊
87.93 ° N=0
26.55 °C
0.02 %TS
[SET](Set)
New data displayed
ZERO POINT
CALIBRATION
HAS BEEN COMPLETED
Press the [SET] key for zero calibration. In zero calibration, the
phase and the fluid temperature of zero point will be replaced
with the present measured values. And also, angle rotation "N"
will be set to zero.
Note: The display will return to the left display automatically
after approximately one second.
5.2.12
Span calibration display and operating procedures
5:SET PARAMETERS
6:ZERO CALIBRATION
7:SPAN CALIBRATION
8:ANGLE ROTATION
Move the cursor to "7" with [→] key, and press [SET] key
to select [7:SPAN CALIBRATION]
[ESC]
(Previous
Menu)
C1:DensityMultiplier
DATA:1.000
[SET] CHANGE
[ESC] RETURN
[SET](Set)
[SET](Fix)
[ESC](Cancel)
C1:DensityMultiplier
RANGE :0.000-9.999
DATA : 1.000
[SET] SET,[ESC]CANCEL
The density multiplier C1 should be set to the suitable
value so that the measured density value is
corresponding to the manual analysis value. For
details, refer to Section 6.5.
 46 
6 F 8 A 0 5 2 1
5.2.13
Phase angle rotation correction display and operating procedures
5:SET PARAMETERS
6:ZERO CALIBRATION
7:SPAN CALIBRATION
8:ANGLE ROTATION
Move the cursor to "8" with [→] key, and press [SET] key
to select [8:ANGLE ROTATION]
[ESC]
(Previous
Menu)
UH:UPPER ANGLE
DATA : 260
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC](Cancel)
[UP]
(Next menu)
UH:UPPER ANGLE
RANGE :240-360 °
DATA : 260
[SET] SET,[ESC] CANCEL
Before shipping, this value is set to 260 degrees. Changing
the setting may result in damaging the otherwise normal
operation. Therefore, normally, do not change the setting.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
SH:LOWER ANGLE
RANGE :0-120
DATA : 100
[SET] SET,[ESC] CANCEL
Before shipping, this value is set to 100 degrees. Changing
the setting may result in damaging the otherwise normal
operation. Therefore, normally, do not change the setting.
[UP]
(Next menu)
N:ROTATION
DATA：0
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Fix)
[UP]
(Next menu)
SH:LOWER ANGLE
DATA :100
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Set)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
N:ROTATION
RANGE :−10 - 10
DATA : 00
[SET] SET,[ESC] CANCEL
Normally, the angle rotation N is automatically computed;
therefore, it is unnecessary to change the setting through
manual input. However, there are some cases of high density
measurements which require settings through manual input.
UH:UPPER ANGLE
DATA :260
[SET] CHANGE
[ESC] RETURN
 47 
6 F 8 A 0 5 2 1
5.2.14
Linearize/conductity correction display and operating procedures
9:LINEARIZ/CNDUCTVTY
10:ADDITIVES CORRECT
11:OTHERS
Move the cursor to "9" with [→] key, and press [SET] key to
select [ 9:LINEARIZ/CNDUCTVTY]
[ESC]
(Previous
Menu)
LA:DENSITY A
DATA :0.60
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
r:CNDUCTVTY. COEF.
RANGE : 0.00
K1:COEF.
RANGE:0.00-9.99
DATA : 1.00
[SET] SET,[ESC] CANCEL
In the event of three straight lines which closely analogous
each other, the inclination K1 of the 1st line is set.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
K2:COEF.
RANGE:0.00-9.99
DATA : 1.00
[SET] SET,[ESC] CANCEL
In the event of three straight lines which closely analogous
each other, the inclination K2 of the 2nd line is set.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
K3:COEF.
RANGE :0.00-9.99
DATA : 1.00
[SET] SET,[ESC] CANCEL
In the event of three straight lines which closely analogous
each other, the inclination K2 of the 3rd line is set.
[UP]
(Next menu)
[DN]
(Pre. menu)
LB:DENSITY B
RANGE :0.00-99.99
DATA : 01.00
[SET] SET,[ESC] CANCEL
In the event of three straight lines which closely analogous
each other, the density of the crossover point B of the 2nd
and 3rd lines is set.
[UP]
(Next menu)
K3:COEF.
DATA：1.00
[SET] CHANGE
[ESC] RETURN
LA:DENSITY A
RANGE :0.00-99.99
DATA :00.60
[SET] SET,[ESC] CANCEL
In the event of three straight lines which closely analogous
each other, the density of the crossover point A of the 2nd
and 3rd lines is set.
[UP]
(Next menu)
K2:COEF.
DATA：1.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC](Cancel)
[UP]
(Next menu)
K1:COEF.
DATA：1.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Fix)
[UP]
(Next menu)
LB:DENSITY B
DATA：1.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Set)
 48 
[SET](Set)
[SET](Fix)
r:CNDUCTVTY. COEF.
RANGE :0.00-99.99
6 F 8 A 0 5 2 1
 49 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
EC:CONDUCTIVITY
DATA：1.23(LINE)
[SET] CHANGE
[ESC] RETURN
[SET](Set)
[SET](Fix in
"LINE mode")
[ESC](Cancel)
MANU/LINE SELECTION
RANGE :MANU/LINE
DATA:(LINE)
[SET] SET,[ESC] CANCEL
[UP] and [DN] is used to switch between
MANU/LINE to select the method for setting
the electric conductivity.
By selecting "LINE" and pressing [SET] (see
the screen above), the electric conductivity
is continually corrected with the electric
conductivity of the measured object.
MANU/LINE SELECTION
RANGE :MANU/LINE
DATA:(MANU)
[SET] SET,[ESC] CANCEL
[UP]
(First menu)
[ESC]
(Cancel)
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
After the electric
conductivity is
entered, [SET] is used
to confirm the setting
in MANU mode.
LA:DENSITY A
DATA :0.60
[SET] CHANGE
[ESC] RETURN
 50 
By selecting "MANU" (see the screen
above) and then pressing [SET], the
electric conductivity of the measured
object is made settable as the fixed value
through manual input.
EC:CONDUCTIVITY
RANGE :0.00-10.00
DATA: 00.00
[SET] SET,[ESC] CANCEL
6 F 8 A 0 5 2 1
5.2.15
Additives correction display and operating procedures
9:LINEARIZ/CNDUCTVTY
10:ADDITIVES CORRECT
11:OTHERS
Move the cursor to "10" with [→] key, and press [SET]
key to select [10:ADDITIVES CORRECT ]
[ESC]
(Previous
Menu)
AF:ADDITIVES COMP.
DATA :ON
[SET] CHANGE
[ESC] RETURN
[SET](Set)
[SET](Fix)
[ESC](Cancel)
AF:ADDITIVES COMP.
RANGE :OFF/ON
DATA:ON
[SET] SET,[ESC] CANCEL
Each time the [UP] or [DN] key is pressed, OFF/ON are
mutually alternated thus making it possible to select the
availability of the additives correction function. If OFF is
selected, the following screen will not appear.
[ESC]
(Previous
Menu)
Ad:DISPLAY DENSITY
DATA：TOTAL
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
Ac:OUTPUT DENSITY
DATA：TOTAL
[SET] CHANGE
[ESC] RETURN
[UP]
(Next menu)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
Ad:DISPLAY DENSITY
RANGE :TOTAL/MAIN
DATA:TOTAL
[SET] SET,[ESC] CANCEL
Each time the [UP] or [DN] key is pressed, TOTAL/MAIN are
mutually alternated thus making it possible to switch between
density calculations to be displayed. If TOTAL is selected, the
density of the entirety in which the pulp and the additives are
combined will be displayed. If MAIN is selected, the density of
only the pulp, which is the main object, will be displayed.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
Ac:OUTPUT DENSITY
RANGE :TOTAL/MAIN
DATA:TOTAL
[SET] SET,[ESC] CANCEL
Each time the [UP] or [DN] key is pressed, TOTAL/MAIN are
mutually alternated thus making it possible to switch between
density calculations to be output. If TOTAL is selected, the
density of the entirety in which the pulp and the additives are
combined will be output. If MAIN is selected, the density of only
the pulp, which is the main object, will be output.
 51 
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
Ap:PARAMETER SET NO.
DATA：01
[ESC]
[SET] CHANGE
(Previous [ESC] RETURN
[SET](Set)
[SET](Fix)
[ESC](Cancel)
Menu)
[DN]
(Pre. menu)
[DN]
(Pre. menu)
[ESC](Cancel)
s0:MAIN OBJ. SENS.
RANGE :−9.99 - 9.99
DATA: 1.00
[SET] SET,[ESC] CANCEL
The sensitivity of component 0 (pulp) is set.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
s1:ADDITIVE SENS.
RANGE :−9.99 - 9.99
DATA: 0.00
[SET] SET,[ESC] CANCEL
The sensitivity of additive 1 is set. In the same manner, the
sensitivities of the following additives 2 to 5 are set.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
s2:ADDITIVE SENS.
RANGE :−9.99 - 9.99
DATA: 0.00
[SET] SET,[ESC] CANCEL
[UP]
(Next menu)
s3:ADDITIVE SENS.
DATA：0.00
[ESC]
(Previous [SET] CHANGE
[ESC] RETURN
Menu)
[DN]
(Pre. menu)
[SET](Fix)
[UP]
(Next menu)
s2:ADDITIVE SENS.
DATA：0.00
[ESC]
(Previous [SET] CHANGE
[ESC] RETURN
Menu)
[DN]
(Pre. menu)
[SET](Set)
[UP]
(Next menu)
s1:ADDITIVE SENS.
DATA：0.00
[ESC]
(Previous [SET] CHANGE
[ESC] RETURN
Menu)
[DN]
(Pre. menu)
Ten parameter sets ( tables for each brands) can be
registered for additives correction. This is used for selecting
the parameter set number appropriate to the brand in the
event of making measurements with additives correction, or
for selecting the parameter set number in the event of newly
registering or changing an individual parameter.
[UP]
(Next menu)
s0:MAIN OBJ. SENS.
DATA：1.00
[ESC]
(Previous [SET] CHANGE
[ESC] RETURN
Menu)
Ap:PARAMETER SET NO.
RANGE:1 - 10
DATA:01
[SET] SET,[ESC] CANCEL
[SET](Set)
[SET](Fix)
[ESC](Cancel)
s3:ADDITIVE SENS.
RANGE :−9.99 - 9.99
DATA: 0.00
[SET] SET,[ESC] CANCEL
[UP]
(Next menu)
s4:ADDITIVE SENS.
DATA：0.00
[ESC]
(Previous [SET] CHANGE
[ESC] RETURN
Menu)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
[UP]
(Next menu)
 52 
s4:ADDITIVE SENS.
RANGE :−9.99 - 9.99
DATA: 0.00
[SET] SET,[ESC] CANCEL
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
s5:ADDITIVE SENS.
DATA: 0.00
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC]
(Previous
Menu)
[ESC](Cancel)
The additive ratio of additive 1 (the mass ratio with regard to
component 0) is set. In the same manner, the sensitivities of
the following additives 2 to 5 are set.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
R2:ADDITIVE RATIO
RANGE :0.000 - 1.999
DATA: 0.000
[SET] SET,[ESC] CANCEL
[SET](Set)
[SET](Fix)
[ESC](Cancel)
R3:ADDITIVE RATIO
RANGE :0.000 - 1.999
DATA: 0.000
[SET] SET,[ESC] CANCEL
[SET](Set)
[SET](Fix)
[ESC](Cancel)
R4:ADDITIVE RATIO
RANGE :0.000 - 1.999
DATA: 0.000
[SET] SET,[ESC] CANCEL
[UP]
(Next menu)
R5:ADDITIVE RATIO
DATA：0.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET]Fix)
R1:ADDITIVE RATIO
RANGE :0.000 - 1.999
DATA: 0.000
[SET] SET,[ESC] CANCEL
[UP]
(Next menu)
R4:ADDITIVE RATIO
DATA：0.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Set)
[UP]
(Next menu)
R3:ADDITIVE RATIO
DATA：0.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC](Cancel)
[UP]
(Next menu)
R2:ADDITIVE RATIO
DATA：0.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Fix)
s5:ADDITIVE SENS.
RANGE :−9.99 - 9.99
DATA: 0.00
[SET] SET,[ESC] CANCEL
[UP]
(Next menu)
R1:ADDITIVE RATIO
DATA：0.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Set)
[SET](Set)
[SET](Fix)
[ESC](Cancel)
[UP]
(Next menu)
AF:ADDITIVES COMP.
DATA :ON
[SET] CHANGE
[ESC] RETURN
 53 
R5:ADDITIVE RATIO
RANGE :0.000 - 1.999
DATA: 0.000
[SET] SET,[ESC] CANCEL
6 F 8 A 0 5 2 1
5.2.16
Other menus display and operating procedures
9:LINEARIZ/CNDUCTVTY
10:ADDITIVES CORRECT
11:OTHERS
Move the cursor to "11" with [→] key, and press [SET] key to select
[ 11:OTHERS]
[ESC]
(Previous
Menu)
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
C2:DensityMultiplier
DATA：1.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[UP]
(Next menu)
[SET](Fix)
[ESC](Cancel)
[UP]
(Next menu)
C3:DensityMultiplier
DATA：1.000
[SET] CHANGE
[ESC] RETURN
ho:4-20mA IN [EXT]
RANGE :LAST/4mA/TEST
DATA: 4mA
[SET] SET,[ESC] CANCEL
The simulated output at contact OFF in the event of external synchronized
operation can be selected. Each time the[UP] or [DN] key is pressed, the mode
display is switched around among LAST VALUE (immediately preceding value),
4mA and TEST OUTPUT (simulated output 0.0 to 99.9%TS when in setting mode).
[SET] is pressed with the mode display to select.
DI:C CHANGE. ON/OFF
DATA :OFF
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[SET](Set)
ho:4-20mA IN [EXT]
DATA :4mA
[SET] CHANGE
[ESC] RETURN
[SET](Set)
[SET](Fix)
[ESC](Cancel)
DI:C CHANGE. ON/OFF
RANGE :ON/OFF
DATA: OFF
[SET] SET,[ESC] CANCEL
Up to four density multipliers can be switched around by the external voltage
signal (DI) of two points. This is used for switching the brand, etc. On this
menu, whether to perform the density multipliers switching (ON) or not (OFF)
is selected. Each time the [UP] or [DN] key is pressed, ON/OFF are mutually
alternated.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
C2:DensityMultiplier
RANGE :0.000-9.999
DATA: 1.000
[SET] SET,[ESC] CANCEL
In the event of performing the density multiplier switching by means of the
external voltage signal (DI) of two points, the second density multiplier is set. In
the same manner, the following 3rd and 4th density multipliers are set. The first
density multiplier is performed with the menu for span calibration.
[SET](Set)
[SET](Fix)
[ESC](Cancel)
[UP]
(Next menu)
 54 
C3:DensityMultiplier
RANGE :0.000-9.999
DATA: 1.000
[SET] SET,[ESC] CANCEL
6 F 8 A 0 5 2 1
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
C4:DensityMultiplier
DATA：1.000
[SET] CHANGE
[ESC] RETURN
[DN]
(Pre. menu)
[ESC]
(Previous
Menu)
[SET](Fix)
[ESC](Cancel)
C4:DensityMultiplier
RANGE :0.000-9.999
DATA: 1.000
[SET] SET,[ESC] CANCEL
[UP]
(Next menu)
NA:N AUTO ADJUSTMENT
DATA：ON
[ESC]
[SET] : CHANGE
(Previous [ESC] : RETURN
Menu)
[ESC] RETURN
[DN]
(Pre. menu)
[SET](Set)
[UP]
(Next menu)
ho:4-20mA IN [EXT]
DATA :4mA
[SET] CHANGE
[ESC] RETURN
[SET](Set)
[SET](Fix)
[ESC](Cancel)
NA:N AUTO ADJUSTMENT
RANGE :ON/OFF
DATA: ON
[SET] SET,[ESC]CANCEL
Although, in the event of high density measurement, the software is
installed in such a manner that the automatic adjustment function of
the phase angle rotation is automatically canceled (OFF) by the
setting full-scale (the upper density measurement range), the
function can also be canceled by force through manual input.
However, normally, set it to "ON".
Each time the [UP] or [DN] key is pressed, ON/OFF are mutually
alternated.
 55 
6 F 8 A 0 5 2 1
6. OPERATIONS
6.1 Procedures for Preparing and Running
Make preparations and perform operations, that is, density measurements, in accordance with the
following procedure.
Verifying the piping
See 6.2(1)
Verifying the valve closure
See 6.2(2)
Verifying the cable connection
See 6.2(3)
Verifying the converter power-ON & display
See 6.3.1(1)
Warm-up
See 6.3.1(2)
Verifying and setting measurement
conditions
See 6.3.2(1) and (2)
Filling up the density meter pipe with drinking
water (density 0%)
Zero calibration
See 6.4(2) to (10)
Pour the fluid to be measured
See 6.5
Span calibration
Refer to 6.6, 6.7
Startup
See 6.6
 56 
Normally omitted.
See 6.4(11) to (15)
6 F 8 A 0 5 2 1
6.2 Preparations before Turning on Power
(1) Check piping
Check piping and ensure that there are no loose nuts and bolts, or missing gaskets. Make sure that
the density meter is properly connected in the pipeline.
See the section 3.3, Installation and Piping.
(2) Close the valves
Make sure that the drain valve, sampling valve, and zero water valve, which are installed in the
pipeline, are all closed.
(3) Verifying the cable connection
It is verified that cables are correctly connected to their respective terminal blocks. It is verified
that the ground (grounding resister: less than 100 Ω) is reliably connected to this density meter. In
the event of performing an external synchronized operation, the external contact input signal
connected with ON/OFF of the pump is required; therefore, make sure that the external contact
input signal cable is reliably connected.
6.3 Power on and Preparations for Measuring
6.3.1
Turning power on
(1) Turn the power switch on
Turn on the power switch of the converter and see that the power indicator([POWER]), the
density indicator, and the LCD indicator are lit.
(2) Warming-up
Please warm up for 30 minutes or more to achieve a steady measurement after turning power on.
 57 
6 F 8 A 0 5 2 1
6.3.2
Verifying and setting measurement conditions
(1) Verifications and settings for initial powering-ON
In the event of starting the operation after turning on the power for the first time since installing this
density meter, it is necessary to first set the measurement conditions of the converter. Various
measurement conditions (parameters) are verified and set by means of the setting key while
viewing each menu screen of the LCD indicator. Major measurement conditions are as follows.
① Verifying and setting the measurement range.
Unless otherwise specified in your order, the value here is set to 0 to 3%TS, which is the
provisional set value at the time of factory shipment. Reset the value in accordance with the
operation condition of your plant. If the measurement range is specified in your order, verify
that the value is set as specified. If the value is different, reset it.
② Verifying and setting the operation mode
At the time of factory shipment, this is set to "CONT" (the normal continuous operation
mode). In the event of the density meter being made empty due to pump shutdown or valve
closure, etc. or of using such a method that stops the flow for some time, it is recommended
that "EXT" (the external synchronized operation of switching between ON/OFF of
measurement by means of ON/OFF of the external contact input signal connected with the
pump ON/OFF) be selected.
In the event that the external synchronized operation is selected, the values of“delayed time
(dt)”and“output at contact OFF(ho)”are the provisional set values at the factory shipment.
If the those values are meet to the operation conditions of the plant rest it to an appropriate
value in accordance with the operation conditions of the plant.
③ Verifying and setting the simulated output in setting mode.
Normal measurements are suspended while this density meter is in the setting mode (see "2
SETTING MENU"); thus, both the density display and the density output are given the
simulated values ( density test output (ot)) that are set beforehand. Although, at the time of
factory shipment, the value is provisionally set to "1.5%TS" (50% of the specified full-scale
density if the measurement range is specified), reset it to an appropriate value in accordance
with the operation conditions of the plant.
④ Verifying and setting the moving average times
At the time of factory shipment, the "moving average times" is set to 1 (without the moving
average). If the averaged output is required to be used for density control, etc., set it to about
10. The more the moving average times, the worse the responsiveness becomes with regard
to density variation. Therefore, set it to an appropriate value in accordance with the plant
conditions, including the right balance with the responsiveness.
⑤ For other measurement conditions, the standard values are set. Therefore, it is normally
unnecessary to change these settings.
[NOTE]
“10 VARIOUS FUNCTION” describes various functions of the Density Meter LQ500.
If necessary, make additional settings for using these functions appropriately.
(2) Verifications at the time of normal power-ON
In the event that measurement conditions of the converter are already set with the operation not
being the first one since installation, verify the set value while referring to (1).
 58 
6 F 8 A 0 5 2 1
 59 
6 F 8 A 0 5 2 1
6.4 Zero Calibration
All the density meters are calibrated for zero point [zero point phase ( θ1 ) and zero point water
temperature (T0) ] at the time of shipment and parameters are set correctly. You do not need to
calibrate the meter for zero point before using it at site.
In the case of the density readings are found to be way off from the result by manual analysis, or
when you need to read just the zero point for a particular reason, follow the procedures below in
calibrating the zero.
For information on the converter operation and the LCD display regarding zero-point calibration,
please refer to Subsection 5.2.11.
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this varies
with the operation status) to return to the initial menu display. Next, use the [→] key to move the
LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then press the [SET]
key to display the warning message saying "Test output will be valid." Make sure that there is no
problem and then press [→] to get into the setting mode. And return to [2: SETTING MENU].
Then, the output will be switched to the simulated output that is set beforehand.
(2) Stopping the flow in the pipeline
If it is allowed to stop the flow in the pipeline where the detector is installed, do so by, for example,
turning off the pump.
● If it is not allowed to stop the fluid flow through the pipeline:
When it is not permitted to stop the flow of the line, bypass the flow by opening the valve on the
bypass pipe.
◆ It is recommended that the bypass piping be installed for adjustment/maintenance purposes
such as zero calibration in the event that the flow in the pipe line cannot be stopped.
(3) Close the upstream valve and downstream valve
Close the shutoff valves on both sides of the detector tightly.
Note: Be sure to close the upstream valve first.
◆ In the event that the density meter is installed on the discharge side of the pump, make sure to
shut the valves starting from the upstream one to prevent the fluid pressure in the density meter
from rising.
(4) Drain the detector pipe
Open the drain valve of the pipeline where the detector is installed to discharge the fluid.
(5) Open the zero water feed port
Open the valve or remove the cap to feed zero water.
◆ When you open the zero water feed port, make sure that the pressure of the fluid in the pipeline
where density meter is installed becomes zero before opening the port. Any remaining pressure
will cause the measured matter to be spurted out. Be careful about this.
(6) Close the drain valve
(7) Supplying zero water
Put zero water (such as tap water) in the pipeline where the density meter is installed through the
zero water supply port by using a vinyl hose.
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(8) Clean inside of the detector main pipe
When the pipeline where the detector is installed is filled with zero water, open the drain valve to let
out the water from the pipeline.
Clean inside of the pipeline where the density meter is installed by repeating Steps (7) and (8) until
the water density can be said to be zero against the density of the object fluid. (It is not necessary
to make the water clean and transparent.)
(9) Fill up the detector pipe with zero water
After cleaning the pipeline where the density meter is installed, close the drain valve, and fill it with
zero water. Keep adding water while releasing air until water overflows the feed port.
(10) Wait
Leave the detector and water in this state for about 15 minutes.
◆ In the event that the flow of the measured matter can be switched to that of the zero water by
switching over to another valve, etc., it is all right to replace the work activities (2) to (10) with
the relevant method and implement the following zero calibration while allowing the zero water
to keep flowing. Even when switching the flow to that of zero water, wait for about 15 minutes
before implementing the zero calibration.
(11) Selecting the zero calibration menu (see Subsection 5.2.5)
After verifying that the converter is in the setting mode ("2 SETTING MENU") through the
operation of (1), use the [→] key to move the cursor of the LCD indicator to the menu number "6"
of [6 ZERO CALIBRATION] and then press the [SET] key.
(12) Check zero water density reading (see Subsection 5.2.11)
The measured density of zero water is displayed on the density indicator. If the indicator shows [−
0.00], it means that the zero point is off toward the negative.
(13) Zero calibration (see Subsection 5.2.11)
If the zero point is found to be off, press the [SET] key. The data (θ1, T0, zG) of the zero point is
replaced by the current data, thus rendering the angle rotation to N=0 and automatically the density
display to zero. The data (θ1, T0, zG) of the zero point is stored in the memory of the density meter
until the zero calibration is implemented once again, thus making it possible to verify it on the
constant monitoring menu. However, for the purpose of history management, keep a note of the
data.
◆ Unless the zero point is out of place, the zero calibration is suspended by pressing the [ESC]
key.
(14) End zero calibration
This completes the zero calibration. Close the zero water valve, ensure that the sampling valve and
drain valve are closed, then open the shutoff valves on both ends of the detector pipe, downstream
first and upstream next. Lastly, close the shutoff valve on the bypass pipe to restore the flow of the
fluid as before the calibration.
(15) Restoring to the measuring mode
Press the [ESC] key of the converter twice to return the menu of the LCD indicator to the initial
menu display to return to the usual measuring mode from the setting mode. Thus, the measurement
starts.
◆ In the event that the external synchronized operation is selected, the external contact input
signal is changed to ON, thus starting the density measurement after the specified dela yed time
has elapsed.
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6.5 Span Calibration
Span calibration is for adjusting the readings of the density meter to the values determined by
manual (off-line) analysis.
For information on the converter operation and the LCD display regarding span calibration, please
refer to Subsection 5.2.12.
(1) Preparations for manual analysis
Prepare following items for manual analysis; a moisture meter (for example, an infrared moisture
meter, with the accuracy or percentage reading down to 0. 1 %), plastic bottles of about l liter with
a wide opening, and plastic beakers of about l00 ml for manual analysis.
(2) Sample fluid for manual analysis
Slightly open the sampling valve on the pipeline and let out the fluid a while before filling a 1-liter
bottle to half. Read and record the density value of the current fluid.
[NOTE]
◆ Make sure to carry out the sampling when the density of the measured matter is in a
stable state with the measured matter flowing.
(3) Manual analysis
Put a part of the sample fluid into a 100-ml plastic beaker, and measure the density of it using drying
and weighing method of analysis.
(4) Calculation of density multiplier
Use the result of analysis to calculate a density multiplier using the following equation after the
manual analysis conducted:
Density multiplier C = A/(M/C’)
where M is the density by the density meter (as read and recorded);
A is the result of the manual analysis
C’ is the density multiplier before span calibration
(Initially, C’ is equal to 1.000 which is the value set in the factory before shipping)
For example, if M = 4.0 ％TS, A = 4.8 ％TS and C’=1.000
C = 4.8 / (4.0/1) = 4.8/4.0 = 1.2
◆ In the case that span calibration has been done already, and density multiplier C is not 1.000, the
new density multiplier C can be calculated in the following way.
For example, if M = 4.8 %TS, A = 4.2 %TS and C0=1.2
C = 4.2 / (4.8/1.2) = 4.2/4 = 1.050
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(5) Setting the density multiplier
(5-1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once
although this varies with the operation status). Next, use the [→] key to move the
LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Tset output will be vaild."
Make sure that there is no problem and then press [→] to get into the setting mode.
And return to [2: SETTING MENU]. Then, the output will be switched to the
simulated output that is set beforehand.
(5-2) Selecting the converter constant setting menu (see Subsection 5.25)
The menu list of menu numbers 5 to 8 is displayed. Use the [→] key to move the LCD
indicator cursor to the menu number "7" of "7: SPAN CALIBRATION" and then
press the [SET] key to select the menu of "7: SPAN CALIBRATION."
(5-3) Verifying and recording the density multiplier before span calibration
For example, the set value of the current density multiplier as is displayed as in
"DATA: 1.000" is displayed. Record this value.
(5-4) Setting the density multiplier
Press the [SET] key to switch over to the setting menu of the density multiplier and
enter the density multiplier found in (4). Use the [→] key to move from one digit to
another. Use the [UP] and [DN] keys to switch around the number of the relevant
digit. When the input is completed, press the [SET] key to confirm it. Then, the display
will be returned to the immediately preceding menu screen. Verify that the resetting
has been done correctly.
(5-5) Restoring to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the
measuring mode from the setting mode, thus restarting the usual measurement. Verify
that the density display has been changed appropriately in accordance with the setting
of the density multiplier.
◆ In the event that the external synchronized operation is selected, the external
contact input signal is changed to ON, thus starting the density measurement after
the specified delayed time has elapsed.
(6) Completing the span calibration
Thus, the span calibration is completed.
[NOTE]
The above describes the method for finding the density multiplier as an example in the
comparison with one-time manual analysis. However, to exclude errors caused by sampling,
it is recommended that as many comparative data as possible be collected to find the density
multiplier from their mean value.
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6.6 Operation
(1) Startup (see Subsection 5.2.5)
When the power is turned ON, the menu setup is automatically changed to the measuring mode
(the state of "1: MONITORING MENU"), thus starting the density measurement. If the meter is in
setting mode (the state of "2:SETTING MENU"), the density measurement operation is started by
pressing the [ESC] key several times (varying between one to three times depending on the
operation status) and thus pulling the menu setup out of the setting mode.
◆ In the event that the external synchronized operation is selected, the menu setup is changed to
the measuring mode and the external contact input signal is turned ON, thus starting the density
measurement after the specified delayed time has elapsed.
(2) Executing the measurement
Executes the density measurement while updating the output values (density current output value;
LED density display; LCD density display on the monitor menu) approximately every second.
(3) Suspending the measurement (see Subsection 5.2.5)
When stopping the measurement, select "2: SETTING MENU" from the initial menu list to get into
the setting mode. Once in the setting mode, the density measurement will be suspended and the
output will be switched to the simulated value that was set beforehand.
◆ In the event that the external synchronized operation is selected, the density measurement is
suspended if the external contact input signal is turned OFF even in the measuring mode. For
details including the output when the density measurement is suspended, refer to Section 6.7.
[NOTE]
◆ In the event the fluid does not flow continuously in the pipeline where the density meter
is installed or the pipeline is temporarily left empty due to the intermittent operation of the
shifting pump, perform the external synchronized operation described in Section 6.7.
◆ When the flow in the pipeline is stopped, solid matters may settle down or float causing
the density in the pipe to lose its uniformity, which in turn may cause the density measured
value to gradually rise or fall. In addition, if the fluid drains out from the pipeline, the
pipeline where the density meter is installed is not completely filled with the fluid, the
density measured value turns out to be erroneous (such as exceeding the full-scale range;
shifting to the minus side; major marginal error). However, this does not mean that the
density meter has failed. Even to avoid such a phenomenon, it is necessary to perform the
external synchronized operation.
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6.7 External Synchronized Operation
This operation mode is used in the event that the measured matter does not flow continuously or the
interior of the detector is temporarily left empty due to the intermittent operation of the shifting
pump to the pipe line on which the density meter is installed. This mode is used to take
measurements only when operating the shifting pump.
To use this operation mode, it is necessary to connect the shifting pump operation and the contact
signal (no-voltage) to the external synchronized input signal pins beforehand.
6.7.1
Movement of the external synchronized operation
Time
Pump operating status
(External contact)
Pump shutdown (OFF)
Pump operation (ON)
Pump shutdown (OFF)
Time
Density measuring
status(Output)
Suspension of density
measurement
(Simulated output)
Execution of density
Suspension of density
measurement
(Measured value output) measurement (Simulated output)
delayed time
Fig.6.7.1 External synchronized Operation
The external synchronized operation, as shown in Fig. 6.7.1, is so designed that the density
measurement is executed only while the pump is being operated; and the density measurement is
suspended while the pump is shut down and the simulated output is issued during this time. The
external synchronized operation is effective in preventing the following inadequate phenomena.
① The pump shutdown causes solid matters to subside or float thus making it impossible to take
density measurements correctly.
② The pump shutdown may cause the fluid to escape from the density meter thus either leaving
it completely empty or insufficiently filled with fluid. In such a situation, the measured value of
the density meter falls into error such as full-scale excess, shift to the minus side, or
occurrence of fluctuation within major marginal error.
It takes time for the pipeline where the density meter is installed to be filled sufficiently with the
fluid after the pump is operated. Here, it is so arranged that the measurement start after the
"delayed time" that is set beforehand has elapsed since receiving the contact signal linked with the
pump operation. Make sure that the delayed time that is set is sufficient for the whole process of
the pipe length and flow, etc. from the pump to the density meter.
As the simulated value when the density measurement is suspended, it is possible to select from
among three options: "4mA", "density measured value immediately preceding the pump shutdown"
and "simulated output in setting mode". The default value is 4mA. However, make sure to select a
simulated output suitable to your system.
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6.7.2
Setting the external synchronized operation
(1) Setting the delayed time (see Subsection 5.2.10)
(1-1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once
although this varies with the operation status) to return to the initial menu display.
Next, use the [→] key to move the LCD indicator cursor to the menu number "2" of "2
SETTING MENU" and then press the [SET] key to display the warning message
saying "Test output will be valid." Make sure that there is no problem and then press
[→] to get into the setting mode. And return to [2: SETTING MENU]. Then, the
output will be switched to the simulated output that is set beforehand.
(1-2) Selecting the parameter setting menu (see Subsection 5.25)
The menu list of menu numbers 5 to 8 is displayed. Use the [→] key to move the LCD
indicator cursor to the menu number "5" of "5: SET PARAMETERS" and then press
the [SET] key to select the menu of "5: SET PARAMETERS."
(1-3) Setting the delayed time at the time of external synchronized(see Subsection 5.2.10)
Press the [UP] key five times to select the setting menu of the delayed time at the
time of external synchronized(dt: DELAYED SYNC. TIME). Press the [SET] key to
get into the set value input screen and then enter an appropriate value (the time
sufficient for the measured matter to flow up to the density meter and fill up the pipe
after the shifting pump operation is started). Use the [→] key to move from one digit
to another. Use the [UP] and [DN] keys to switch around the number of the relevant
digit. When the input is completed, press the [SET] key to confirm it. Then, the display
will be returned to the immediately preceding menu screen. Verify that the resetting
has been done correctly.
(2) Setting the simulated output at measurement suspension (at external contact OFF)
(see Subsection 5.2.16)
As the simulated output when the measurement is suspended (at external contact OFF), it is
possible to select from among three options as shown in Table 6.7.1. Make sure to select a
simulated output suitable to your system.
Table 6.7.1 Density Display and Output at Measurement Suspension
in External Synchronized Operation
Mode
"4mA" (Standard)
Density Indicator Display
"TEST"
Held in 0%TS
same as the simulated output
value in setting mode
"LAST"
Holds the density measured value
immediately before OFF
Output (4 - 20mA)
Output held in 4mA
Same as the simulated output value
correspondence output in setting
mode
Holds the density measured value
correspondence output immediately
before OFF
(2-1) Selecting the "OTHERS" setting menu (see Subsection 5.2.5)
Continuing on from (1), press the [ESC] key to return to the display of menus 5 to 8 in
setting mode. Press the [UP] key to switch to the display of the next menus 9 to 11.
Use the [→] key to move the cursor of the LCD indicator to the menu number "11" of
"11: OTHERS" and press the [SET] key to select the "11: OTHERS" menu.
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(2-2) Setting the output mode at contact OFF in external synchronized operation (see
5.2.16)
The current output mode at contact OFF in external synchronized operation is
displayed in the initial menu "ho: 4-20mA IN [EXT]" of "11: OTHERS". To make
changes, it is necessary to press the [SET] key and place the software in the setup
state. Each time the [UP] or [DN] key is pressed, the mode display is switched
around from "LAST" (immediately preceding value), through "4mA" to "TEST" (the
simulated output value in setting mode). Press the [SET] key on the display in the
selected mode to confirm. The screen is returned to that of the immediately preceding
menu screen. Make sure that the resetting is done correctly.
(2-3) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu and return from the setting
mode to the measuring mode to resume the normal measurement.
(3) Setting the ope ration mode
(3-1) Selecting the operation mode change menu (see Subsection 5.2.6)
In the initial menu, use the [→] key to move the cursor of the LCD indicator to the
menu number "3" of "3: MEASURING MODE" and then press the [SET] key to get
into the operation mode menu.
(3-2) Verifying and setting the operation mode
The current operation mode is displayed at "DATA" of the LCD indicator . "CONT"
refers to the mode of taking measures continuously without relying on the status of the
external contact signal, whereas "EXT" refers to the external synchronized operation
mode. If the current setting is "CONT," press the [SET] key to get into the setup
screen of operation mode; press the [UP] or [DN] key to switch the set value of the
operation mode to "EXT"; and press the [SET] key to confirm. The screen is returned
to the immediately preceding menu screen. Make sure that the resetting has been
done correctly.
(4) Starting the external synchronized operation
With the settings above, measurement ON/OFF are proceeded with as shown in Fig.6.7.1 in
accordance with external synchronized contact signal ON/OFF.
6.8 Functions Related to Operation
To enable you to use the Density Meter Type LQ500 more appropriately in various processes and
situations, the device is equipped with various functions including the moving average, the
change-rate limit, the electric conductivity correction, the additive correction, the linearizer and the
density multiplier switching by external signals. Make settings necessary for using these functions
appropriately where necessary. For details, please refer to Chapter 10.
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7. MAINTENANCE
7.1 Precautions for Maintenance, Inspection and Parts
Replacement
Yellow
DO
WARNING
■Be sure to set the power
switch on the equipment to the
OFF position before doing
maintenance or inspection
inside the equipment or
replacing its parts.
■Be sure to set the power
switch on the equipment to the
OFF position before replacing
the fuse.
DO
Failure to observe this can cause
electric shock.
Failure to observe this can cause
electric shock or equipment failure.
DO
■Do not touch the terminal
block during maintenance or
inspection. If it is necessary to
touch the terminal block, set the
power switch on the equipment
to the OFF position in advance.
■Do not attempt disassemble
or modify the equipment.
DON’T
Failure to observe this can cause
electric shock or equipment
failure.
Failure to observe this can cause
electric shock.
Yellow
Yellow
The label shown at left is placed near
each terminal block on the equipment
to which power is supplied. Be careful
of electric shock.
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7.2 Maintenance and Inspection Items
Periodic maintenance and inspection is necessary for reliable measurement over a long period of
time. Since the density meter has no mechanically moving parts, however, it does not require
replacement of mechanism elements in a normal operating environment.
Compare the density measured value and the manually analyzed value in the cycle shown in Table
7.1. If necessary, implement the span calibration after implementing the zero calibration. Clean up
the detector when it is necessary.
The spare parts that must be kept on hand are the fuses in Table 7.2.
Table 7.1 Maintenance and Inspection Items
Item
Comparison of density meter measured
value with manually analyzed value
Check the appearance of detector
(accumulation of dirts, scratches, etc)
[NOTE]
Cycle
Any time
Remarks
At least three samples are
desirable.
Any time
◆ If the density meter measured value deviates from the manually analyzed value to the
extent of causing obstacles, implement the span calibration (changing the density
multiplier C) while referring to Section 6.5.
◆ If the density meter measured value greatly deviates from the manually analyzed value by
less than half or more than twice, implement the span calibration after implementing the
zero calibration while referring to Section 6.4 and 6.5.
◆ If the density meter is used to measure process flow whic h contains plenty of wool or
fabric substances, these substances may accumulate on the detector, thus perform
maintenance and inspection, and cleaning periodically (every 3 months).
Table 7.2 Spare Parts
Name
Fuse
Specifications
2A(T),250V cartridge, glass tubular fuse,
5.2mm outer dia. x 20mm long
Shape/characteristics: 5NM or equivalent (based on JIS C
6575)
 69 
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6 F 8 A 0 5 2 1
[NOTE]
◆ Fuses are parts with expected life span. Therefore, replace them periodically.
(Recommended replacement cycle: about 3 years)
◆ In general, the service life of an electronic part becomes shorter at higher ambient
temperature. There is a DC switching power supply in the converter that contains
electrolytic capacitors. The service life is about 10 years at the ambient temperature of
20°C or about 3 years at 50°C. For stable use of the meter for many years, it is desirable
to replace these parts in time. When replacing the capacitors, please contact Toshiba's
Service Dept.
◆ In the event that the characters on the LCD display becomes weak in contrast or edge,
it is considered that the LCD display unit has reached the end of its life. Although such
unsatisfactory visibility may not affect the performance of the density measurement, the
display unit should be replaced if it interferes with the operation. When replacing the
display unit, contact Toshiba's Service Dept.
◆
Regarding the arrester (converter), part replacement differs depending on how often
lightning occurs.
Suppose lightning (induction lightning) occurs twice a year, service life expires in 5 years
and replacement is necessary.
For arrester replacement, an entire arrester unit (board: converter) should be replaced.
To replace the unit, please contact our service personnel.
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8. TROUBLESHOOTING
8.1 Troubleshooting
If any trouble has developed, make a careful check and take appropriate steps. Table 8.1 shows
possible troubles, their causes, and remedies. If anything wrong occurs, refer to the table below and
take the necessary steps. If that does not remedy the trouble, send information on the trouble, in as
much detail as possible, and self-diagnosis data to our Service Department.
Table 8.1 Troubleshooting (1)
No.
Trouble
Cause
Remedy
AC power is not supplied.
Check terminals [L1] and [L2] on terminal
block with voltage tester. If AC voltage is
not supplied, supply AC power in
accordance with specifications.
Fuse (2A) is blown.
Replace fuse.
ALARM indicator lights;
density meter error
contact output..
Fault in the density meter
In accordance with Section 8.2, perform
self-diagnosis data check and restoration
operations. If ALARM indicator lights
again, send self-diagnosis data to our
Service Department.
While the flow is
stagnant, the indicator
is in error.
The fluid in the pipeline
where the detector is
installed drained out.
While the flow is
stagnant, the measured
density value slowly
increases or decreases.
Density becomes uneven
Use the externally synchronized
because the measurement operation.
object fluid in the fluid in the
See Section 6.7.
pipe starts to sinks or
(Density meter is not faulty.)
floats, thus causing the
density in the center portion
of measured fluid to
increase or decrease.
Converter power cannot
be switched on.
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Table 8.1 Troubleshooting (2)
No.
Trouble
Cause
Inappropriate density
correction factor setting.
Remedy
Calibrate span as described in
section 6.5.
Air accumulates and keep
staying inside the detector.
Or substance being
measured is sediment.
Very slow flow can be the cause.
Make the flow faster by using
smaller bore detector to prevent air
or substance from remaining in the
detector. If this does not solve the
problem, resort to vertical piping.
Large quantity of bubbles are
contained in the fluid.
Too much difference
between measured
density and manual
analysis value
Large quantity of bubbles are
contained in the fluid.
Find out where the air is brought
in, and make necessary
adjustments. Keep mixer vanes
under water. Position the pump
inlet low enough. Keep fluid
pressure high (0.1MPa or more is
recommended).
Remedy the locations containing
air bubbles. An example is to
position the blade of the agitator in
the tank below the fluid level.
Another example is to position the
inlet port of the pump sufficiently
below the fluid level.
Take necessary steps to make
the fluid pressure high (0.1MPa or
more is recommended).
It is desirable to install the meter
on the discharge port of the pump.
At the same time, make sure that
the meter is placed as far as
possible (closer to the pump) from
the pipe outlet for air release.
The pipeline where the
detector is installed is not
filled with the substance to
Measured density
be measured that flows.
varies widely and does Or air remains in the pipeline
not agree with manual where the detector is
analysis value.
installed.
Keep the tube always filled up with
fluid by closing the downstream
valve slightly or add a relief valve.
Installing the density meter on the
outlet side of the pump can help
eliminate the cause of those
troubles. Vertical piping is
recommended for filling the pipe.
Suitable location
varies depending on
density.
Calibrate zero point as described
in Section 6. 4, then calibrate
span described in Section 6.5
Output is either
unstable or unsuitable.
Zero point is off.
The electric conductivity of
the measured matter is too
high.
Converter failure
 72 
Check if the electric conductivity
is within the specified range.
If the electric conductivity is
beyond the range, send its
measurement results and
self-diagnosis data to our Service
Department.
Send self-diagnosis data to our
Service Department.
6 F 8 A 0 5 2 1
8.2 Error Indications and Recovery Operations
If an error occurs to the density meter, the error indicator [ALARM] will light up and a contact
signal (OFF) will be output.
Check the self-diagnosis data for any faulty values in accordance with the following steps.
(1) Monitor menu display (see Subsection 5.2.4)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "1" of "1: MONITORING MENU" and
then press the [SET] key. (The cursor of the initial state is located on "1".)
(2) Switching to the self-diagnosis menu (see Subsection 5.2.7)
In the monitoring menu, use the [→] key to move the cursor of the LCD indicator to the menu
number "3" of "3: SELF-DIAGNOSIS" and then press the [SET] key.
(3) Checking the self-diagnosis data (see Subsection 5.2.9)
Press the [UP] key to move from one self-diagnosis data to another to check for any error.
◆ To detect which numerical range is an error value, please refer to Table 8.2.
(4) Terminating the self-diagnosis
After checking, press the [ESC] key twice to return to the initial menu display.
If an error value is found, turn off all the power switches of the converter and then turn them back
on. The self-diagnosis is executed all over again by the powering-ON. If an error is displayed again
as a result of the self-diagnosis, send the relevant item to our Service Department.
 73 
6 F 8 A 0 5 2 1
Table. 8.2
Data Item
Symbol
Item name
Self-diagnosis data
Data Status
ST
Status
[STATUS]
• Normal [GOOD]
• Warning [WARNING.]
Whether the phase
measurement operation is
normally functioning or not can
be verified.
SL
Microwave
recieved signal
level
[MICROWAVE
SIG. LVL]
Without error judgment based
on data numeric
Microwave coef.
Without error judgment based
［MICROWAV
on data numeric
E COEF.］
Data (Numeric value range;
normal data range, status)
• Usual range: -90 to -40 (dBm)
• Normal range: 1825 ∼ 1975
Data
concerning
microwave
phase
measurement
[RF DATA]
Without error judgment based
on data numeric
• Normal range + 10.0 ∼ + 80.0 (°C)
+5 V voltage
[+5V POWER
SUPPLY]
Without error judgment based
on data numeric
• Normal range
4.5 ∼ 5.5（V）
pd
Reference
phase error
［REF
PHASE］
Without error judgment based
on data numeric
• Normal range
- 9.9 ∼ + 9.9 (°C)
Memory check
［MEMORY
CHECK］
Normal
Abnormal
［GOOD］
[N.G.]
 74 
EPROM, RAM, EEPROM are
checked
6 F 8 A 0 5 2 1
9. CORRECTIONS IN
DENSITY CALCULATION
This density meter, which operates on the basis of phase difference measurement by microwaves
makes automatic corrections to the measured phase angel for the fluid temperature and phase
angel rotation before making the density calculations for the measured substance.
This chapter describes the methods for corrections and the density calculations.
9.1 Density Calculation
This density meter measures the phase lag θ1 in the density zero water (zero water), which is the
basis, and the phase lag θ2 in the measured matter, the difference △θ(= θ2 - θ1) of which
being proportional to the density is used to obtain the density. The density (X) of the measured
matter is calculated in accordance with the following equation.
X= C ×（a × △θ ）＋ b
where
： Measured density value (%TS)
△θ ： Phase difference. △θ = θ2−θ1 (degrees)
： Density line slope;
： Density intercept;
： Density multiplier (Density correction factor.)
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9.2 Various Kinds of Corrections
9.2.1
Phase angle rotation correction
The phase is available only from 0 degree to 360 degrees. If the phase incrementally reaches 360
degrees, it returns to 0 degree, from which it keeps incrementing again. If the phase decreasingly
reaches 0 degrees, it returns to 360 degrees, from which it keeps decreasing again. Accordingly,
the concept of phase angle rotation is incorporated into this density meter and some corrections
have been made so to allow the phase to change to an unlimited extent. In such a manner, this
density meter has overcome the limit that the phase is available only from 0 to 360 degrees, thus
realizing high density measurement.
Phase angle rotation correction refers to obtaining the real phase angle θ2 by judging the number
of rotations the dummy angle θ2' belongs to based on the measured values coming before and
after.
θ2 = θ2' + N x 360 (degrees)
N: Number of rotations
Set N=0 at the time of zero calibration, making the number of rotations to zero for the phase
angle
θ1 at zero point.
If the θ2' exceeds 360 degrees to enter into the next rotation, set N=1. If it again exceeds
360 degrees to enter into the rotation after the next rotation, set N=2.
(N will move up to 2 only if the meter is of large diameter and the density is high.)
On the other hand, if θ2' goes below zero (0) degree to enter into the previous rotation,
decrease N by one (1). In other words, when it goes into the -1st rotation from the 0th one,
set N=−1; and when into the 0th rotation from the 1st one, set N=0.
Note: The description above is the basics regarding the phase angle rotation correction. Normally,
it is all right to use the density meter without being aware of this correction. However, in the
event of measuring high density, etc., special setups and actions may be needed. For details,
refer to Section 9.3.
9.2.2
Fluid temperature correction
The phase tends to change in a straight line with regard to the fluid temperature. In this connection,
fluid temperature correction is performed on θ2 as follows to obtain the phase difference △θ
△θ={θ2−α（Τ−Τ０）}− θ1
△θ
: △θ: Phase difference [degrees]
θ2
: Actual phase angle of measurement object fluid [degrees]
θ1
: Phase during zero water measurement (degrees)
(Measured during zero calibration, and set in advance as a constant)
α
: Fluid temperature correction factor (degrees/℃)
: Temperature of measurement object fluid (℃)
T0
: Water temperature during zero calibration (℃)
(Measured during zero calibration, and set in advance as a constant)
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9.2.3
RF correction
In addition to the fluid temperature correction, the density meter is equipped with the RF correction
function in accordance with the features of the converter. The correction is performed on θ2 as
follows to obtain the phase difference △θ.
△θ={θ2−α（Τ−Τ０）−δ（Ｇ−Ｇ０）}−θ1
△θ
: Phase difference [degrees]
θ2
: Actual phase angle of measurement object fluid [degrees]
θ１
: Phase during zero water measurement (degrees)
(Measured during zero point calibration, and set in advance as a constant)
α
: Fluid correction factor (degrees/℃)
Τ
: Temperature of measurement object fluid (℃)
Τ０
: Water temperature during zero adjustment (℃)
(Measured during zero point calibration, and set in advance as a constant)
δ
: RF correction factor
Ｇ
: RF data during measurement
Ｇ０
: Zero point RF data
(Measured during zero point calibration, and set in advance as a constant)
9.2.4
Ambient temperature correction
In addition to the fluid temperature correction and RF correction, the density meter is equipped with
the ambient temperature correction function. The correction is performed on θ2 as follows to
obtain the phase difference △θ.
 Since ambient temperature correction function is an option, ambient temperature
correction factor ß must be set “0.00”.
△θ={θ2−α（Τ−Τ０）−δ（Ｇ−Ｇ０）ß（Ａ‐Ａ０）
}−θ1
△θ
θ2
θ１
α
Τ
Τ０
δ
Ｇ
Ｇ０
ß
Ａ
Ａ０
: Phase difference (degrees)
: Actual phase angle of measurement object fluid (degrees)
: Phase during zero water measurement (degrees)
(Measured during zero point calibration, and set in advance as a constant)
: Fluid correction factor (degrees/℃)
: Temperature of measurement object fluid (℃)
: Water temperature during zero adjustment (℃)
(Measured during zero point calibration, and set in advance as a constant)
: RF correction factor
: RF data during measurement
: Zero point RF data
(Measured during zero point calibration, and set in advance as a constant)
: Ambient temperature correction factor (degrees/℃)
: Ambient temperature (℃)
: Ambient temperature during zero adjustment
(Measured during zero point calibration, and set in advance as a constant)
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9.3 Phase Angle Rotation Correction (Details)
This section describes the special setups and actions required for cases of measuring high density.
In normal measurement, it is unnecessary to be aware of the phase angle rotation correction, which
is performed automatically.
9.3.1
Care point concerning phase angle rotation
As described in 9.2.1, the number of phase angle rotations N is incremented or decreased judging
from the values before and after the measured value. Such a processing requires the condition that
the measured phase value varies continuously in accordance with the density of the measured
matter. If the density meter detector is empty, however, the continuity of measured phase values is
damaged thus making a normal phase angle rotation correction impossible, which in turn may cause
the number of phase angle rotations to jump to a faulty value. If the number of phase angle rotations
N is inappropriate, the density calculation result will also turn out to be erroneous. Once such a
trouble occurs, it is necessary to reset the number of phase angle rotations N to an appropriate
value through manual input.
9.3.2
Phase angle rotation in external synchronized operation
The trouble previously described will be solved by performing the "external synchronized
operation" incorporated into this density meter. In the external synchronized operation, if the
contact signal is switched OFF synchronized with the pump shutdown, not only the output is
switched to the simulated one but also the immediately preceding value is kept as the number of
phase angle rotations N.
9.3.3
Outline of automatic adjustment function of phase angle rotations
Furthermore, this density meter is equipped with the function of "automatic adjustment of phase
angle rotations." This function judges whether the measured density calculated with the number of
phase angle rotations N is proper or not in terms of the set density measurement range, etc. and
then adjusts the number of phase angle rotations either incrementally or decreasingly if necessary.
Even when the density meter detector is temporarily made empty thus causing the number of phase
angle rotations N to jump to an inappropriate value, this function is also used to fill up the density
meter detector once again with the matter to be measured and automatically adjust the number of
phase angle rotations N to an appropriate value, which in turn will render an appropriate value for
the measured density. While the density meter detector is left empty, the measured phase value
itself comes to have an indefinite value, which in turn will render the measured density indefinite.
Therefore, if the density meter detector could be made empty, it is desirable to perform the external
synchronized operation.
9.3.4
Judgment conditions and adjustments for automatic adjustment of phase angle
rotations
The judgment conditions and adjustments regarding the automatic adjustment of phase angle
rotations and the measured density are listed in Table 9.3.1.
Table 9.3.1 Judgment Conditions and Adjustments
for Automatic Adjustment of Phase Angle Rotations
Measured Density
Xmin = Less than −4(%TS)
−4∼C×a×360(%TS)
Xmax = More than C x a x 360 (%TS)
Automatic Adjustment of Phase Angle Rotations N
Incremented (N = N+1)
Unadjusted
Decreased (N = N-1)
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6 F 8 A 0 5 2 1
In Table 9.3.1 above,
C: Density multiplier
a: Density slope
(Varies with the character of the measured matter.)
(A constant determined by the meter size)
The values of the respective meter size in C = 1, 0.7 and 1.8 as examples of the value Xmax in which
N is judged to be too large are listed in Table 9.3.2. Each of the values is the result of the value
when C=1 in Table 9.3.2 multiplied by C.
Table 9.3.2 Value of XMAX (%TS)
0.7
1.0
1.8
9.3.5
50mm
42.34
60.48
108.86
80mm
26.46
37.80
68.04
100mm
21.17
30.24
54.43
Aperture
150mm
200mm
14.11
10.57
20.16
15.12
32.29
27.22
250mm
8.57
12.24
22.03
300mm
7.06
10.08
18.14
Restrictions and invalidation in applying the automatic adjustment of phase angle
rotations
This function of automatic adjustment of phase angle rotations involves some application
restrictions. For example, it cannot be applied to the case of measuring high density as follows.
 In the case of meter size: 150 mm; upper density measurement range: 20%TS; and
density multiplier: 0.7
As shown in Table 9.3.2, Xmax=14.11(%TS). Therefore, when the measured density
exceeds 14.11(%TS), the adjustment of decreasing the number of phase angle
rotations applie s as shown in Table 9.3.1, thus making it impossible to measure the
density in excess of 14.1(%TS).
To solve the problems as shown in the example above, measurement is taken so that the function of
automatic adjustment of phase angle rotations is automatically invalidated if the upper measured
density range exceeds Xmax.
Check the operating conditions to see if the function of automatic adjustment of phase angle
rotations is applicable or not.
[NOTE]
9.3.6
In the cases where the automatic adjustment of phase angle rotations is not applicable, after
the density meter detector is temporarily made empty, it is necessary to reset the phase angle
rotation to an appropriate value through manual input. In the cases, it is more desirable to
perform the external synchronized operation.
Invalidation by setting the automatic adjustment of phase angle rotations
As mentioned in the previous subsection, the density meter is equipped with the function of
automatically invalidating the function of automatic adjustment of phase angle rotations, based on
the conditions for setting the upper density measurement range and the density multiplier.
However, in the state of starting the operation, the upper density measurement range is determined
but the density multiplier is not determined yet (determined in the span calibration described in
Section 6.5), thus the operation is started with a provisional value (initial value: 1). Therefore, the
function of automatic adjustment of phase angle rotations, which is supposed to be invalidated, may
not be invalidated, making it impossible to take an appropriate measurement (including the span
calibration). This applies to the case in which the original density multiplier is smaller than the
current set value (the initial value 1 in the initial operation).
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6 F 8 A 0 5 2 1
There are two ways of dealing with such a case.
One is to automatically invalidate the function of automatic adjustment of phase angle rotations by
provisionally setting a sufficiently small value such as about 0.5 for the density multiplier C so that
Xmax is smaller than the upper density measurement range.
Another is to forcibly invalidate the function of automatic adjustment of phase angle rotations. The
latter's setting method is described below.
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid." Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the "OTHERS" setting menu (see Subsection 5.2.5)
Initially, the menu list of menu numbers 5 to 8 is displayed. However, by pressing the [UP] key
once, this display can be switched to the menu list of the next menu numbers 9 to 11. Use the
[→] key to move the LCD indicator cursor to the menu number "11" of "11: OTHERS" and
then press the [SET] key to select the menu of "11: OTHERS."
(3) Verifying or changing ON/OFF of automatic adjustment of phase angle rotations
(see Subsection 5.2.16)
Press the [DN] key once (or the [UP] key five times) to display "NA: N AUTO
ADJUSTMENT". On this screen, it is possible to verify whether the automatic adjustment of
phase angle rotations is valid (ON) or invalid (OFF). Here, if it is necessary to alter the setting,
press the [SET] key to switch to the setup display of the automatic adjustment of phase angle
rotations. Each time the [UP] or [DN] key is pressed, the set value is alternated between ON
and OFF. Set the value to OFF and then press the [SET] key to confirm it. The screen will be
returned to the immediately preceding one; make sure that the value is correctly reset.
(4) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
9.3.7
Actions after invalidating the automatic adjustment of phase angle rotations
After invalidating the automatic adjustment of phase angle rotations to make it possible to take
measurements appropria tely even at high density in excess of Xmax, implement the span
calibration in accordance with Section 6.5 and set the density multiplier to an appropriate value.
While referring to Table 9.3.2, use this reset density multiplier to calculate the maximum density
Xmax, which can be applied to the function of automatic adjustment of phase angle rotations and
judge whether this Xmax is greater than the value of the upper density measurement range that is
set.
If Xmax is greater than the upper density measurement range, the function of automatic adjustment
of phase angle rotations is applicable. Therefore, return the function of automatic adjustment of
phase angle rotations which is set to "OFF" in Subsection 9.3.6 to“ON”.
If Xmax is smaller than the upper density measurement range, the function of automatic adjustment
of phase angle rotations is invalid. Therefore, it is unnecessary to return the function of automatic
adjustment of phase angle rotations which is set to "OFF" in Subsection 9.3.6 to “ON”.
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6 F 8 A 0 5 2 1
9.3.8
Return to the normal through manual input of the phase angle rotations
If the function of automatic adjustment of phase angle rotations is not applicable whereas the
density meter detector is temporarily made empty thus causing the number of phase angle rotations
to jump to a faulty number, the number of phase angle rotations fails to return to an appropriate
value even when the density meter detector is refilled with the matter to be measured, thus allowing
the measured density to remain in error. In this connection, it is necessary to reset the phase angle
rotation to an appropriate value through manual input. The setting method is described below.
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid." Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the "ANGLE ROTATION" setting menu (see Subsection 5.2.5)
In the state that the menu list of menu numbers 5 to 8 is displayed, use the [→] key to move the
LCD indicator cursor to the menu number "8" of "8: ANGLE ROTATION" and then press the
[SET] key to select the menu of "8: ANGLE ROTATION".
(3) Verifying or changing the number of phase angle rotations (see Subsection 5.2.13)
Press the [DN] key once (or the [UP] key twice) to display "N: ROTATION". On this screen,
it is possible to verify the number of phase angle rotations. Here, press the [SET] key to switch
to the setup display of the number of phase angle rotations and enter an appropriate value
(note). At the initial digit, use the [UP] or [DN] key to select whether to attach the "-" symbol
or not. Use the [→] key to move to the digit, and use the [UP] or [DN] key to alter the
numeric value of the relevant digit. When entering input is completed, press the [SET] key to
confirm it. The screen will be returned to the immediately preceding one; make sure that the
value is correctly reset.
Note: In many cases, an appropriate value for the number of phase angle rotations N is
0. In the event that the density or the fluid temperature is high, this value may be 1.
In the event that the density or the fluid temperature is low, it may be -1. Set either
of 0, 1 and -1 and then verify that the measured density at this time has returned to
an appropriate value.
(4) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
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10. VARIOUS FUNCTIONS
10.1 Various Functions and their Outlines
The density meter LQ500 is equipped with various functions to be used more appropriately in
various processes and in various situations. Depending on the process being applied or the method
of using the meter, some functions may not be necessary. Based on the descriptions below, choose
the functions you need. Table 10.1.1 describes the functions equipped in this meter and outlines.
Table 10.1.1 Various Functions
Function Name
1)
External
synchronized
operation
2)
Moving
average
3)
Change-rate
limit
4)
Electric
conductivity
correction
5)
Additives
correction
6)
7)
Linearizer
Density
multiplier switching
Application and Outline
Remarks
Perform this external synchronized operation in the event that the
pump to the pipe line on which the density mete r is installed is
operated intermittently and the object of measurement does not
flow continuously or in the event that the detector is temporarily
made empty.
Use this function in the event of requiring the averaged output to
be used for density control, etc. The function is useful for
suppressing the deflection width of the output.
In the event of a sudden change in the density or a sudden
variation in the output due to intrusion by bubbles, etc., this
function is used to exclude these signals to restrain the sudden
output change.
This function is used in the event that the electric conductivity of
the matter to be measured has changed substantially. Since this
does not usually become a real problem, it does not need this
function usually. When using this function, however, it is
necessary to separately prepare a electric conductivity meter,
install it on a proper location and input the electric conductivity
signal into the density meter.
In the event that the brand (with varying components and
compound ratio) of the matter to be measured is switched from
one to another, this function is used to omit the span calibration
in terms of each brand by registering beforehand the list in which
the sensitivity and compound ratio of the respective components
are input (up to ten lists can be registered) and then selecting the
list number.
Since the density meter has a satisfactory linear relationship
between its actual density and instrument output, a linearization
correction is normally unnecessary. Therefore, this function is
provided as a measure to deal with special cases.
This function is to switch around up to four density multipliers by
means of ON/OFF of two external voltage signals(DI). The
See Section 6.7.
 82 
See Section
10.2.
See Section 10.3
See Section
10.4.
See Section
10.5.
See Section
10.6.
See Section
10.7.
6 F 8 A 0 5 2 1
by external signal
function can be used to facilitate the density measurement of up
to four different types of matters (brand) which differ in
measurement sensitivity.
10.2 Moving Average
10.2.1 Function of moving average
Assuming that the moving average times is "n", this function is to calculate and output the mean
value of n preceding measured values each time. The function is used when an averaged output is
required such as for density control. This function is also useful for suppressing the deflection width
of output.
The value that can be set as the moving average times "n" is 1 to 99. Setting 1 for "n" means that no
moving average takes place.
10.2.2
Setting of the moving average times
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid." Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the parameter setting menu (see Subsection 5.2.10)
In the state that the menu list of menu numbers 5 to 8 is displayed, use the [→] key to move the
LCD indicator cursor to the menu number "5" of "5: SET PARAMETERS" and then press the
[SET] key to select the menu of "5: SET PARAMETERS."
(3) Verifying or setting the moving average times (see Subsection 5.2.10)
Press the [DN] key three times (or the [UP] key eleven times) to display "ma: AVERAGING
TIMES". On this screen, it is possible to verify the set value of the moving average times. If it
is necessary to change the setting, press the [SET] key here to switch to the setup display of
the moving average times and enter an appropriate value. Use the [→] key to move to the digit,
and use the [UP] or [DN] key to alter the numeric value of the relevant digit. When entering
input is completed, press the [SET] key to confirm it. The screen will be returned to the
immediately preceding one; make sure that the value is correctly reset.
(4) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
10.2.3 Cautions in using the moving average function
Setting an excessively large value for the moving average times will result in deteriorated
responsiveness. Therefore, make sure to set a value appropriate to the process situation and the
required responsiveness.
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10.3 Change-rate limit
10.3.1 Outline of change-rate limit function
In the event of a sudden change in the density or a sudden variation in the output due to intrusion by
bubbles, etc., this function is used to exclude these signals to restrain the sudden output change. By
setting two measurement conditions of permissible variation width and limit times, the conditions for
change-rate limit are set.
It is possible to set 0.00 to 9.99(%TS) as the permissible variation width and 0 to 99 times as the
limit times. Setting the limit times to zero means that no change-rate limit is imposed.
10.3.2 Examples of operating the change-rate limit function
The change-rate limit function is described with examples below.

The setting conditions shall be as follows.
* Width of change-rate limit function: 0.5%TS
* Times of change-rate limit function: Twice
The conditions that are set as above mean the following.
① All the variations within 0.5%TS are permitted and output without modification.
② Variations exceeding 0.5%TS are limited up to twice, outputting the immediately preceding
signal in place of the relevant signals.
③ Variations in excess of 0.5%TS which continue three times are judged to be signal variations
resulting from actual density variations, thus outputting the 3rd signal without modification.
3.0
3.0
2.5
2.0
Density signal
(%TS)
Density signal (%TS)
Example 1: Operation for temporary and sudden signal variation
2.5
2.0
1.5
1.0
0.5
0.0
1.5
1.0
0.5
0.0
6 7
Signal No..
10
Signal No..
10
Fig.10.3.2 Output Signal After Variation Factor
Restriction
Fig.10.3.1 Original Signal
Fig.10.3.1 shows the original signal before the change-rate limit is processed. No.1 to No.4 are
varying within a small width; however, only signals No.5 and No.6 are varying in excess of 0.5%TS
deviation from the immediately preceding signal No.4. No.7 to No.10 are back to a small width of
variation.
In the event that the above-set change-rate limit is applied to such signals, the output signals are as
shown in Fig.10.3.2. Since signals No.5 and No.6 are varying in excess of 0.5%TS with regard to
signal No.4, signal No.4 is output instead with regard to No.5 and No.6. Signal No.7 is output
without modification. Signals No.8 to No.10, which are also within the variation width of 0.5%TS
with regard to the respective immediately preceding signals, are output without modification.
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Example 2: Signal change in the shape of steps
Density signal (%TS)
Density signal (%TS)
3.0
2.5
2.0
1.5
1.0
0.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
10
Signal No.
Signal No.
10
Fig.10.3.4 Output Signal After change-rate limit
Fig.10.3.3 Original Signal
Fig.10.3.3 shows the original signal before the change-rate limit is processed. The numeric values
along the horizontal axis refer to the signal numbers. No.1 to No.4 are varying within a small width;
however, signal No.5 is varying in excess of 0.5%TS with No.6 to No.10 remaining in a state not
very different from No.5.
In the event that the above-set change-rate limit is applied to such signals, the output signals are as
shown in Fig.10.3.4. Since signals No.5 and No.6 are varying in excess of 0.5%TS with regard to
signal No.4, signal No.4 is output instead with regard to No.5 and No.6.
Signals No.7 to No.10, which are within the variation width of 0.5%TS with regard to the
respective immediately preceding signals, are output without modification.
10.3.3
Cautions in using the change-rate limit factor
(1) Setting the change-rate limit width
The value can be set within the range of 0.00%TS to 9.99%TS. If the width is set to as little a
value as the normally indicated deflection width, restricted signals will increase and indications
will vary in the shape of steps. Therefore, set a sufficiently large value so that the variation
width is reliably judged to be in error.
(2) Setting the times of change-rate limit
Signals that are made faulty due to intrusion of large bubbles, etc. may affect two neighboring
signals in relation to measurement timing. Therefore, although the change-rate limit has an
effect even when it is applied only once, it is desirable to set the times of change-rate limit at
least to two times in order to reliably exclude error signals. In the event of density variations in
the shape of steps as shown in Example 2, a delay increases in accordance with the set times.
Set an appropriate value for the times in accordance with the responsiveness required of the
plant.
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10.3.4
Setting the change-rate limit
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid". Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the parameter setting menu (see Subsection 5.2.5)
In the state that the menu list of menu numbers 5 to 8 is displayed, use the [→] key to move the
LCD indicator cursor to the menu number "5" of "5: SET PARAMETERS" and then press the
[SET] key to select the menu of "5: SET PARAMETERS".
(3) Verifying or changing the change-rate limit width (see Subsection 5.2.16)
Press the [DN] key two times (or the [UP] key twelve times) to display "dx: CHANGE
RATE LIMIT". On this screen, it is possible to verify the set value of the change-rate limit
width. If it is necessary to change the setting, press the [SET] key here to switch to the setup
display of the change-rate limit width and enter an appropriate value for the width. Use the
[→] key to move to the digit, and use the [UP] or [DN] key to alter the numeric value of the
relevant digit. When entering input is completed, press the [SET] key to confirm it. The screen
will be returned to the immediately preceding one; make sure that the value is correctly reset.
(4) Verifying or changing the times of change-rate limit (see Subsection 5.2.16)
Continuing on from the operation in (3) above, press the [UP] key once to display "HL: LIMIT
TIMES". On this screen, it is possible to verify the set value of the change-rate limit times. If
it is necessary to change the setting, press the [SET] key here to switch to the setup display of
the change-rate limit times and enter an appropriate value for the times. Use the [→] key to
move to the digit, and use the [UP] or [DN] key to alter the numeric value of the relevant digit.
When entering input is completed, press the [SET] key to confirm it. The screen will be
returned to the immediately preceding one; make sure that the value is correctly reset.
Note: If the times of change-rate limit is set to zero, the change-rate limit function is
made inactive.
(5) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
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10.4 Electric Conductivity Correction
10.4.1 Standard conductivity correction factors
The indication of the density meter varies with the conductivity of the measured object fluid;
however, the variance is as small as approx. 0.15%TS to 1mS/cm change in conductivity and
usually practically negligible, thus making it unnecessary to input the conductivity meter signal to
perform electric conductivity correction. In the event that the conductivity change is large and thus
its impact is not ignoble, make sure to use the electric conductivity correction function. The formula
for this correction including the other corrections described in Chapter 9 is as follows.
△θ={θ2 -α（Τ-Τ０）-δ（Ｇ-Ｇ０）-ß (A-A0) -γ(E-E０)} -θ1
△θ
: Phase difference (degrees)
θ2
: Actual phase angle of measured object fluid (degrees)
θ1
: Phase during zero water measurement (degrees)
(Measured during zero calibration, and set in advance as a constant)
α
: Fluid temperature correction factor (degrees/℃)
Τ
: Fluid temperature of measured object fluid (℃)
Τ０
: Water temperature during zero calibration
(Measured during zero calibration, and set in advance as a constant)
δ
: RF correction factor
Ｇ
: RF data during measurement
Ｇ０
: Zero point RF data
(Measured during zero calibration, and set in advance as a constant)
γ
: Electric conductivity correction factor (degrees/(mS/cm))
Electric conductivity of measured object fluid (mS/cm)
E０
: Zero water conductivity (mS/cm)
ß
: Ambient temperature correction factor (degrees/℃)
Ａ
: Ambient temperature (℃)
Ａ０
: Ambient temperature during zero adjustment
(Measured during zero point calibration, and set in advance as a constant)
At the time of factory shipment, the [electric conductivity correction factor γ] is set to zero for all
the products. If the conductivity change of the measured object fluid is large, input the electric
conductivity signal in accordance with "Fig.3.5 External Connection Diagram" and then reset the
[electric conductivity correction factor γ].
Table 10.4.1 shows the "standard values" of electric conductivity correction factors as well as the
"density line slope (a)" required in the event of obtaining electric conductivity correction factors
through calculation from measured values. The "standard values" shall be applicable when the
range of the electric conductivity meter used for conductivity correction is
0 to 10 mS/cm.
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Table 10.4.1 Standard Values of Electric Conductivity Correction Factor (γ)
(Based on Electric Conductivity Meter with a Range of 0 to 10 mS/cm)
and Slope of the Line (a)
Meter size
(mm)
50
80
100
150
200
250
300
γ (Standard value)
0.168
0.105
0.084
0.056
0.042
0.034
0.028
0.9
1.4
1.8
2.7
3.6
4.5
5.4
In the event of performing a electric conductivity correction on this density meter, it is a basic
principle to externally connect and use a conductivity meter with a range of 0 to 10 mS/cm. In the
event of using a conductivity meter of another range (0 - R mS/cm), obtain the conductivity
correction factor in accordance with the following formula.
γ=(R/10)×γ0
γ0 : Standard value of electric conductivity correction factor (see Table 9.1)
R:
Upper range of conductivity meter used
For example, if the meter size is 150 mm, the standard value of the electric conductivity correction
factor of the density meter is 2.7 and a conductivity meter with a range of 0 to 5 mS/cm is
connected to this,
γ = (R/10)×γ0
= (5×10)×2.7
= 1.35
is used as the correction factor.
[NOTE]
◆ In the event of implementing a electric conductivity correction, separately prepare a
electric conductivity meter and install it on a location where the conductivity can be
measured correctly (where the measurement object process is appropriate).
◆ The "standard values" of electric conductivity correction factors shown in Table 10.4.1
are criteria. It is necessary to use the linear relationship that exists between the
conductivity and the output to survey and determine the electric conductivity correction
factor in terms of each actual measured object fluid. See Subsection 10.4.2.
◆ In the event of not executing any electric conductivity correction, set the "electric
conductivity correction factor (γ)" to zero.
10.4.2 How to obtain and set a correction factor
Obtain and set a electric conductivity correction factor as appropriate to the applicable process in
accordance with the following procedure.
(1) To set the density multiplier to 1.000
(1-1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once
although this varies with the operation status) to return to the initial menu display.
Next, use the [→] key to move the LCD indicator cursor to the menu number "2" of
"2: SETTING MENU" and then press the [SET] key to display the warning message
 88 
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saying "Test output will be valid." Make sure that there is no problem and then press
[→] to get into the setting mode. And return to [2: SETTING MENU]. Then, the
output will be switched to the simulated output that is set beforehand.
(1-2) Selecting the span calibration menu (see Subsection 5.2.5)
The menu list of menu numbers 5 to 8 is displayed. Use the [→] key to move the LCD
indicator cursor to the menu number "7" of "7: SPAN CALIBRATION" and then
press the [SET] key to select the menu of "7: SPAN CALIBRATION."
(1-3) Verifying or recording the density multiplier (see Subsection 5.2.12)
For example, the set value of the current density multiplier C' is displayed as in
"DATA: 1.265". Record this value.
(1-4) Setting the density multiplier to "1.000" (see Subsection 5.2.12)
Press the [SET] key to switch to the setup display of the density multiplier and reset
the density multiplier to 1.000. Use the [→] key to move to the digit, and use the [DN]
key to alter the numeric value of the relevant digit. When entering input is completed,
press the [SET] key to confirm it. The screen will be returned to the immediately
preceding one; make sure that the value is correctly reset.
(2) To suspend the electric conductivity correction function
(with the conductivity correction factor set to 0.00)
(2-1) Returning to the initial screen of the setting mode
Continuing on from (1-4) above, press the [ESC] key once to return to the menu list
display of the menu numbers 5 to 8 of the setting mode.
(2-2) Selecting the linearizer /conductivity menu (see Subsection 5.2.5)
Press the [UP] key once to switch to the menu list display of the next menu numbers
9 to 11. Use the [→] key to move the cursor of the LCD indicator to the menu number
"9" of "9: LINEARIZ/CNDUCTVTY" and then press the [SET] key to select the
menu of "9: LINEARIZ/CNDUCTVTY".
(2-3) Setting the electric conductivity correction factor to 0.00 (see Subsection 5.2.14)
Press the [UP] key five times (or the [DN] key three times) to display "r:
CNDUCTVTY COEF". Press the [SET] key here to switch to the setup display of
the electric conductivity correction factor and then input 0.00 for the electric
conductivity correction factor. Use the [→] key to move to the digit, and use the [DN]
key to alter the numeric value of the relevant digit. When entering input is completed,
press the [SET] key to confirm it. The screen will be returned to the immediately
preceding one; make sure that the value is correctly reset.
(3) To measure the electric conductivity of the measured object fluid
(3-1) Selecting the monitoring menu (see Subsection 5.2.4)
Press the [ESC] key twice to return to the initial menu screen and return to the
measuring mode from the setting mode to resume the normal measurement. Use the
[→] key to move the cursor to the menu number "1" of the LCD indicator's "1:
MONITORING MENU" and then press the [SET] key to select "1: MONITORING
MENU".
(3-2) Selecting the measured value data display menu (see Subsection 5.2.4)
In the monitoring menu list of the menu numbers 1 to 3, use the [→] key to move the
cursor to the menu number "2" of the LCD indicator's "2: MEASURED VALUES"
and then press the [SET] key to select "2: MEASURED VALUES".
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(3-3) Reading and recording measured conductivity and density values
The externally installed conductivity meter is used to measure the conductivity (E1) of
the measured object fluid while, at the same time, reading the measured density (M1)
from the LCD indicator or from the LED display outside the converter. Take notes of
each measured value.
Next, while varying the conductivity of the measured object fluid, measure as well as
take notes of the conductivity (E2) and the measured density (M2). At this time, take
care to prevent the actual density of the measured obje ct fluid from changing.
E1, E2 : Conductivity (mS/cm)
M1, M2: Measured density value (%TS)
(4) To calculate the electric conductivity correction factor
Obtain the electric conductivity correction factor (γ) in accordance with the following
arithmetic expression.
γ= ΔM/(a×ΔE)
: Density line slope (see Table 9.1: varies with the aperture)
ΔM
: Measured density value difference (M2 – M1)
ΔE
: Measured conductivity value difference (E2 – E1)
For example, if the meter size is 150 mm, it follows that a = 0.056. At this time, let's assume
that the conductivity and the measured density (specified value) are as follows respectively.
1st measurement: E1=1 mS/cm M1=4.0%TS
2nd measurement: E2=2 mS/cm M2=4.2%TS
From here, it follows that
DE =1 mS/cm
DM=0.2 %TS
and the conductivity correction factor is
γ = 0.2/(0.056×1)
= 3.57
(5) To correct the electric conductivity correction factor by means of the conductivity meter's
range.
In the event that the range of the conductivity meter being used is other than "0 to 10 mS/cm",
correct the conductivity correction factor in accordance with the conductivity meter range
while referring to the method of calculating the correction factor in the event that the
conductivity meter range is other than the standard described in Subsection 10.4.1.
(6) To set the ele ctric conductivity correction factor
In the same manner as the operation described in (2), set the electric conductivity correction
factor to the value calculated in (4) and (5).
(7) To return the density multiplier to its original value
In the same manner as the operation described in (1), return the density multiplier to its original
value which has been previously recorded.
(8) To return to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
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mode from the setting mode to resume the normal measurement
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10.5 Additives Correction Factor
10.5.1 Additive Correction Function
This function refers to handling the different brands made from main material with various
additives. If the physical property of the measured object fluid varies, it is necessary to set the
density multiplier for a value appropriate to this difference. Even with multiple types of measured
objects mixed together (mixed fluid), if their compound ratio is regarded to be consistent, it is
possible to measure the density of the entirety or the density of a particular type among them. In
measuring the density of such mixed fluid, each time the physical property and compound ratio of
the objects included in the fluid differ (that is, the brand is different), it is necessary to set the
density multiplier in accordance with the brand of the relevant mixed fluid.
By selecting an applicable brand number from about ten brands registered in advance, this additive
correction function calculates the density in accordance with the brand, thus making it possible to
omit the span calibration in terms of each brand.
Using this function in a simplified manner, by selecting the span calibration factor(density
multiplier) in terms of each brand from the brand list registered in advance, it is possible to simplify
the span calibration. For information on the simplified way of this function, refer to "10.5.5
Simplified way of using the additive correction function".
The contents to be registered into the brand list are as follows.
Table 10.5.1 Brand List
Sensitivity (Note 2)
Component
Note 1
Sign
Comp. 0
Comp.1
Comp.2
Comp.3
Comp.4
Comp.5
s0
s1
s2
s3
s4
s5
Setting range
-9.99
-9.99
-9.99
-9.99
-9.99
-9.99
to
to
to
to
to
to
+9.99
+9.99
+9.99
+9.99
+9.99
+9.99
Set at
shipping
1.00
0.00
0.00
0.00
0.00
0.00
Ratio of mixture (Note 3)
Set at
Sign
Setting range
shipping
----R1
0.000 to 1.999
0.000
R2
0.000 to 1.999
0.000
R3
0.000 to 1.999
0.000
R4
0.000 to 1.999
0.000
R5
0.000 to 1.999
0.000
(Note 1) Component 0 is the main component. Components 1 to 5 are the additives #1 to #5.
(Note 2) Sensitivity values for components #0 to #5 are to be registered for each of 10 brands.
Usually, the sensitivity value for main component s, 0 is set to “1.000.” The sensitivity
values of typical additives are shown in Table 10.5.2. Register s1 to s5 referring to this
table. For the sensitivity values of additives other than the ones shown in Table 10.5.2,
please contact Toshiba. Whenever you send us a sample of additives, we can measure
their sensitivity values. Sensitivity values are measured in the same way as used for span
calibration for each of additives (measured density reading / density by manual analysis).
Table 10.5.2
Additives name
Calcium carbonate
Titanium oxide
Zinc oxide
Talc
Sensitivity
0.45
0.13
0.12
0.61
(Note 3) For each formula in the list of 10 brand, the ratio of mixture for the components #1 to 5 is
to be entered. A ratio of mixture is a ratio of a component against the component 0 (main
component) in weight.
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10.5.2 Density calculation
Following calculation modes can be selected.
(1) Additives correction ON (To be made) / OFF (Not to be made)
(a) Set value at shipping the density meter: OFF
(2) When additives correction is "ON"(to be made), you can select two calculation modes.
(b) Total density of mixture including the additives (TOTAL)
(c) Density of the main component only (MAIN)
In the mode (2) above, each of the density outputs (LED display of the converter, and the
current output in 4 to 20mA dc) can be either (b) or (c) separately.
* Set value at shipping: Both the density display and the density current output are in
"TOTAL" of (b) above.
(a) Density without additives correction
Following calculation is made (same density calc ulation as in section 9.1.3)
Xa = C × (a × Δθ) +b
where, Xa : Measured density value
Δθ : Phase difference that varies in proportion to the actual density
a : Density line slope
b : Density intercept (normally zero).
C : Density multiplier
(b) Additives correction to be made for getting Total Density of whole mixture including the
additives (TOTAL)
Xb =
1 + R1 + R2 + R3 + R4 + R5
× C × (a ×Δθ) + b
s0 + s1 ⋅ R1 + s2 ⋅ R2 + s3 ⋅ R3 + s4 ⋅ R4 + s5 ⋅ R5
where, Xb
s0
s1
s2
s3
s4
s5
Δθ
: Density of the whole mixture
: Sensitivity of the main component only
: Sensitivity of additive #1,
R1 : Mixture ratio of additive #1
: Sensitivity of additive #2,
R2 : Mixture ratio of additive #2
: Sensitivity of additive #3,
R3 : Mixture ratio of additive #3
: Sensitivity of additive #4,
R4 : Mixture ratio of additive #4
: Sensitivity of additive #5,
R5 : Mixture ratio of additive #5
: Phase difference that varies in proportion to the diameter
: Density line slope determined by diameter
: Intercept of the line (normally zero).
: Density multiplier
(c) Additives correction to be made for getting density of main component only (MAIN)
Xc =
× C × (a × ∆θ) + b
s0 + s1 ⋅ R1 + s2 ⋅ R 2 + s3 ⋅ R 3 + s4 ⋅ R 4 + s5 ⋅ R 5
where, Xc : Density of main component
Others are same as in (b)
(Note) When using the additives correction functions of (b) or (c), set the density multiplier C to
1.000. Following procedure is recommended for making span adjustment. At the
beginning of the use of correction, for a whole mixture of a formula, compare the
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measured density readings you get in dry method (dry weight) and in manual analysis,
and when required, make span adjustment by adjusting the density multiplier C of the
whole mixture.
10.5.3 Procedures for using the additives correction function
The procedure for the additives correction function is described as following steps.
Obtain sensitivities of the components
.......
Refer to table 10.5.2.
Select the formula list number for registering (parameters)
Set sensitivities of main component and additives (s0 to s5)
Set mixture ratios of additives (R1 to R5)
Perform zero point calibration
..................
You can set for up to
ten formulas. Each
of which can have
up to five additives,
to which
sensitivities and
ratios can be
entered individually.
Refer to [6.4 Zero Point Calibration]
Set the density multiplier to 1.000
Select ON for additives correction
Select calculation mode for additives correction
(TOTAL or MAIN)
Select the brand list number that corresponds with the formula
(Parameter set)
Let the liquid mixture of selected brand flow.
Read the density indication(M), and simultaneously
sample the substance to measure.
Measure the density (A) of the sample by manual analysis
Calculate C as below, then fine adjust C (density multiplier)
C=(A/M)x1 (Default value of C is 1)
Start measuring Density
When brand is changed
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10.5.4 How to set the additives correction function
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid.". Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the additives correction menu (see Subsection 5.2.5)
Initially, the menu list of the menu numbers 5 to 8 is displayed. Press the [UP] key once to
switch to the menu list display of the next menu numbers 9 to 11. Use the [→] key to move the
cursor of the LCD indicator to the menu number "10" of "10: ADDITIVES CORRECT" and
then press the [SET] key to select the menu of "10: ADDITIVES CORRECT".
(3) Verifying and changing the various settings for additives correction (see Subsection 5.2.15)
(3-1) Selecting the OFF/ON of the additives correction function
Verify the set value of the initial menu "AF: ADDITIVES COMP." of the additives
correction. "OFF" means that the additives correction function is unavailable, thus not
displaying the detailed menu concerning the additives correction. When using the
additives correction function, press the [SET] key to switch to the OFF/ON selection
display of the additives correction. Each time the [UP] or [DN] key is pressed, the set
value alternates between "OFF" and "ON". With the value set to "ON", press the
[SET] key to verify it. The screen will be returned to the immediately preceding one;
make sure that the value is correctly reset.
(3-2) Selecting a density display (see subsection 10.5.2)
Continuing on from (3-1), press the [UP] key to switch to the display of "Ad:
DISPLAY DENSITY". In this menu, decide whether the density display should be
the density of the entire mixed fluid including the additives "TOTAL" or the density of
the pulp only "MAIN". When changing the setting, press the [SET] key to switch to
the selected display, use the [UP] or [DN] key to switch between "TOTAL" and
"MAIN" and then press the [SET] key at the status to be set.
(3-3) Selecting a density display (see Subsection 10.5.2)
Continuing on from (3-2), press the [UP] key to switch to the display of "Ac:
OUTPUT DENSITY". In this menu, decide whether the density current output of 4 to
20mA should be the density of the entire mixed fluid including the additives (TOTAL)
or the density of the pulp only (MAIN). When changing the setting, press the [SET]
key to switch to the selected display, use the [UP] or [DN] key to switch between
"TOTAL" and "MAIN" and then press the [SET] key at the status to be set.
(3-4) Selecting a parameter set number (a brand list number)
Continuing on from (3-3), press the [UP] key to switch to the display of "Ap:
PARAMETER SET NO.". In this menu, select a parameter set number. Press the
[SET] key to switch to the setup display and then input the parameter set number. Use
the [→] key to move to the digit, and use the [UP] or [DN] key to alter the numeric
value of the relevant digit. When entering input is completed, press the [SET] key to
confirm it. The screen will be returned to the immediately preceding one; make sure
that the value is correctly reset.
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(3-5) Setting the sensitivity and the compound ratio
Continuing on from (3-4), press the [UP] key to switch to the menu of "s0: MAIN
OBJ SENS." and then, after switching to the setup display by pressing the [SET] key,
input the sensitivity of the main object (component 0). Use the [→] key to move to the
digit, and use the [UP] or [DN] key to alter the numeric value of the relevant digit.
When entering input is completed, press the [SET] key to confirm it. The screen will
be returned to the immediately preceding one; make sure that the value is correctly
reset. Continue on to switch to the next setup menu display with the [UP] key. And, in
accordance with the same procedure, set the sensitivities s0 to s5 of components
(additives) 1 to 5 as well as compound ratios R1 to R5 of components (additives) 1 to
5.
(4) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
10.5.5 Simplified Correction on Additives
Previous section describes complete correction on additives in which sensitivities and ratios of
mixture per additive were taken into account in calculation. By using only a sensitivity for the whole
mixture (a mixture of pulp and additives), the additives correction can be simplified as described
below. In this simplified correction, a density multiplier (sensitivity) is obtained separately for each
formula and entered into the list of formula. When a formula is changed, you need to select a new
formula number to change the density mulyiplier to continue measuring density. Up to ten formulas
can be entered into the list.
Procedures for a simplified correction is as follows. See the section 10.5.1 to 10.5.3 for basic
information, and refer to section 10.5.4 Operations for correction.
● Procedures for simplified correction of additives.
Set the density multiplier C to 1.000
Select Calculation Mode for additives correction...No (correction)
Perform zero calibration
.......................
See “6.4 Zero calibration”
Carry out span calibration for each brand, and obtain sensitivity as below.
Sensitivity = (Measured density reading)/(Density obtained by manual analysis)
Enter the sensitivity of a formula into the sensitivity s0
of the component 0 in the formula list.
See Note 1.
Select (TOTAL) [total density of a mixture,
with additives correction] for the calculation mode
Select a brand list number
that corresponds with the mixture to be measured.
Run the fluid to measure and measure density
 96 
When the brand is changed.
6 F 8 A 0 5 2 1
(Note1) Set all sensitivities and ratios to 0.00 and 0.000 respectively for all of the components 1 to
5. (Or to the default values set at shipping.)
10.6 LINEARIZER SETTING
10.6.1 Linearizer function
Depending on the kind of substance to be measured, there may not be a linear relationship between
the values measured by the meter and those obtained by manual analysis. Particularly, in the
measurement of low density substance of about 1%, the meter tends to show readings in higher
value at or less than 0.5% or show lower for the density about 1.5% or higher. In such a case, the
1inealization is necessary because it is difficult to match meter-measured values with manual
analysis values with a single density multiplier over a wide range of densities from low to high.
Suppose there is a curve relationship such as that shown in figure 10.6. 1 between meter-measured
values (using a density multiplier of 1.000) and manual analysis values when a certain substance is
measured at varying degrees of density. To make linealization, the curve is approximated by three
straight lines of A, B, and C.
1.5
Manual ly analyzed density %
手
分
析
値
•
•
1.2
• •
•
•
•
•
• •
•
濃 0.8
度
％
•
• •
•
• •
•
0.6
1.0
1.5
Instrument reading X0 (density multiplier 1.00)
計器測定値 XO （濃度補正係数 1.00 ）
Figure 1 0.6.1 Linearizer setting Diagram
Let the meter-measured value (XO) at the bend of the lines A and B (crosspoint) as density A, and
the value at lines B and C to be density B. Also let the slopes of lines A, B, and C as K1, K2, and K3
respectively.
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Meter-measured value XO (density multiplier 1.000) before linearization and meter-measured
value X after linearization have the following relationship.
For X 0 ≤ A
For A < X 0 ≤ B
For B < X 0
where
C: Density multiplier.
X = C ( K 1 X0 )
X = C { K 1 A ＋ K 2 ( X 0 − A)}
X = C { K 1 A ＋ K 2 ( B − A ) + K 3 ( X 0 − B )}
The procedures for making 1inearizer lines and setting them into the meter are as follows:
(1) Create a graph
Plot the relationships between the meter-measured value (X0) at a density multiplier of 1.000
and manual analysis value to make into a graph as shown in figure 10.6.1.
(2) Draw approximate straight lines
Draw in three straight lines that approximate the relationships.
(3) Read densities at crosspoints
Read the meter-measured values (XO) at the cross-points of these lines and get cross-point
densities A and B.
(4) Get the slopes of the lines.
Calculate the slopes of the straight lines as follows to determine K1, K2, and K3.
K1=d/a
K2=e/b
K3=f/c
● Defaults are set as : A = 0.60, B = 1.00, K1 = 1.00, K2 = 1.00, K3 = 1.00
Example of set values (Fig. 10.6.l)
A = 0.6 (%), B = 1.0 (%)
K 1 = 0.8 / 0.6 = 1.33、K 2 = 0.4 / 0.4 = 1.00、K 3 = 0.3 / 0.5 = 0.6
10.6.2 Linearizer setting
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid.". Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the linearizer menu (see Subsection 5.2.5)
Initially, the menu list of the menu numbers 5 to 8 is displayed. Press the [UP] key to switch to
the menu list display of the menu numbers 9 to 11. Use the [→] key to move the cursor of the
LCD indicator to the menu number "9" of "9: LINEARIZ/CNDUCTVTY" and then press the
[SET] key to select the menu of "9: LINEARIZ/CNDUCTVTY".
 98 
6 F 8 A 0 5 2 1
(3) Setting the density and the factor (see Subsection 5.2.14)
The setup menus of density and factor are called one after another from the start of the menu
development of "9: LINEARIZ/CNDUCTVTY". First of all, press the [SET] key at "LA:
DENSITY A" and then, after the setup display of density A is displayed, input the value for
density A. Use the [→] key to move to the digit, and use the [UP] or [DN] key to alter the
numeric value of the relevant digit. When entering input is completed, press the [SET] key to
confirm it. The screen will be returned to the immediately preceding one; make sure that the
value is correctly reset. Continue on to switch to the next setup menu display with the [UP]
key. And, in accordance with the same procedure, set density B and factors K1, K2 and K3.
(4) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
(5) Determining and setting the density multiplier
Perform the density measurement after setting the linearizer and, in accordance with the span
calibration in Section 6.5, determine and set the density multiplier C.
 99 
6 F 8 A 0 5 2 1
10.7 Density Multiplier Switching by External Signals
10.7.1 Density multiplier switching function by external signals
When switching around multiple measurement objects fulid of differing measurement sensitivities
to measure their respective sensitivities, it is possible to take appropriate density measurements by
resetting the density multiplier to a value in accordance with the relevant measured object fluid
each time the measured object fluid is changed. In the event that the measurement objects fluid are
limited to no more than four types, this function can be used to save the trouble of resetting the
density multiplier each time through manual input. Implement the span calibration in terms of each
measured object fluid in advance, obtain and set the respective density multipliers C1 to C4 and
then switch around the density multipliers to be used for density calculation by means of the
external voltage signals of two points in accordance with the measurement objects fluid being
switched around.
Table 10.7.1 shows the relationship between the statuses of external voltage signals and selected
density correction factors.
Table 10.7.1
Status of External Voltage Signal
DI2
DI3
H: Voltage signals of 20 to 30VDC
L: Signals of no more than 2VDC
10.7.2
Selected Density Multiplier
C1(Same as the normally used density multiplier C)
C2
C3
C4
Setting the density multiplier switching by external signals
(1) Switching to the setting mode (see Subsection 5.2.5)
First of all, press the [ESC] key of the converter several times (normally once although this
varies with the operation status) to return to the initial menu display. Next, use the [→] key to
move the LCD indicator cursor to the menu number "2" of "2 SETTING MENU" and then
press the [SET] key to display the warning message saying "Test output will be valid.". Make
sure that there is no problem and then press [→] to get into the setting mode. And return to [2:
SETTING MENU]. Then, the output will be switched to the simulated output that is set
beforehand.
(2) Selecting the "OTHERS" setting menus (see Subsection 5.2.5)
Initially, the menu list of menu numbers 5 to 8 is displayed. However, by pressing the [UP] key,
this display is switched to the menu list of the next menu numbers 9 to 11. Use the [→] key to
move the LCD indicator cursor to the menu number "11" of "11: OTHERS" and then press the
[SET] key to select the menu of "11: OTHERS."
(3) Selecting of density multiplier switching ON/OFF(see Subsection 5.2.16)
Press the [UP] key once to display "DI: C CHANGE ON/OFF". Press the [SET] key here to
switch to the setup display. Each time the [UP] or [DN] key is pressed, the set value
alternates between "ON" and "OFF". Therefore, when using the function of density multiplier
switching by external signals, set the value to "ON" and then press the [SET] key to verify it.
The screen will be returned to the immediately preceding one; make sure that the value is
 100 
6 F 8 A 0 5 2 1
correctly reset.
(4) Setting density multipliers C2, C3 and C4
Continuing on from (3), press the [UP] key once to switch to the display of "C2:
DensityMultiplier". Switch to the setup display by pressing the [SET] key here and then input
the density multiplier C2. Use the [→] key to move to the digit, and use the [UP] or [DN] key
to alter the numeric value of the relevant digit. When entering input is completed, press the
[SET] key to confirm it. The screen will be returned to the immediately preceding one; make
sure that the value is correctly reset. Continue on to switch to the next setup menu display with
the [UP] key and set C3 and C4 in accordance with the same procedure. When setting the
density multiplier C1, refer to "6.5 Span Calibration".
(5) Returning to the measuring mode
Press the [ESC] key twice to return to the initial menu screen and return to the measuring
mode from the setting mode to resume the normal measurement.
 101 
6 F 8 A 0 5 2 1
11. SPECIFICATIONS
11.1 General Specifications
Measurement method: Microwave phase difference method
Measurement range: Density measurement range can be set by defining the lower point
(density corresponding to 4mA) and the upper point (density
corresponding to 20mA) within the following setting ranges. The object
to be measured should be free from cavities inside and should have
sufficient fluidity. For the ranges other than the ones described below,
please contact Toshiba.
Density measurement range lower side: 0 to 49%TS
Density measurement range upper side: 1 to 50%TS
Span range: 0 to 50%TS
Setting step: 0.1%TS
Note 1: TS (Total Solids) = Soluble materials + Non-soluble materials, Span = Density
measurement range upper side − Density measurement range lower side
Note 2: In the case of 50mm in meter size,
Density measurement range lower side: 0 to 48%TS
Density measurement range upper side: 2 to 50%TS
Span range: 2 to 50%TS
Note 3: The object to be measured is required to be free from cavities and have fluidity. Contact
Toshiba for measurement ranges other than those described above.
Note 4: For the range larger than 50%TS, please contact Toshiba.
Repeatability: In the case of 2%TS or more in full-scale, ±2%FS
In the case of less than 2%TS in full-scale, ±4%TS
Note: The values are taken at measuring points above 5% of full-scale using simulated
reagent.
Note: The full scale value is the maximum value on the upper side of the density measurement
range.
Note: In the case of 50mm in meter size, the full-scale shall be 2%TS or more
In the case of 2%TS or more in full-scale , ±2%FS
In the case of less than 2%TS in full-scale , ±4%TS
Note: The values are taken at measuring points above 5% of full-scale using simulated
reagent.
Note: In the case of 50mm in meter size, the full-scale shall be 2%TS or more
Linearity:
Electrical resolution: 0.001%TS
Note: Verifiable resolution using the simulated reagent: 0.05%TS
The verifia ble resolution value refers to the value which is verified through a test of the
density difference which can be resolved as a density meter output. Marginal errors in
testing such as uneven density distribution, testing errors, environmental variations and
so on are also included in this value.
Note: In the case of 50mm in meter size, electrical resolution: 0.002%TS
Verifiable resolution using the simulated reagent:
0.1%TS
 102 
6 F 8 A 0 5 2 1
Ambient environment condition: Temperature: 0 to 50°C (Option: Detector −20 to 50°C)
Humidity:
5 to 90%RH (No condensation)
Structure:
Detector Immersion-proof type (IP67: Immersion-proof type or equivalent)
Converter Waterproof type (IP65: Waterproof type or equivalent)
Note: Outdoor installation is possible. If there is a possibility of direct sunlight, however,
provide a sunshade to the converter to avoid direct sunlight.
Vibration: (1) Applying vibration of a resonant frequency in 5 to 150 Hz range in x, y and z
directions for 30 minutes each totaling 90 minutes, and no deterioration of
performance nor damage shall be found.
However, acceleration is as follows:
• Detector: 25m/s2
• Converter: 4.9m/s2
(2) Applying vibration of 5 to 150 to 5 Hz with the acceleration shown in (1) above for
3 minutes and this is repeated 10 times for each direction of vibration totaling 90
minutes, and no deterioration of performance nor damage shall be found.
Altitude : Up to 2000m
Mass:
Refer to the Attached Figure 1, “Dimensions” in “Appendix.”
Microwave transmission power: Approx. 10W
11.2 Detector Specifications
Meter size:
50mm, 80mm, 100mm, 150mm, 200mm, 250mm, 300mm
Flange standard and maximum operating pressure
Flange standard
Maximum operating pressure
JIS 10K(JIS B 2238 10K) or equivalent
1MPa
ANSI150
1MPa
DIN10 & BS 10
1MPa
DIN 16
1.6MPa
Fluid temperature:
0 to 100°C (Not freezing)
Fluid conductivity:
Meter size
50 mm
80 mm
100 mm
150 mm
200 mm
250 mm
300 mm
Fluid conductivity
20 mS/cm or less
16 mS/cm or less
15 mS/cm or less
10 mS/cm or less
8 mS/cm or less
8 mS/cm or less
6 mS/cm or less
Note: Precautions about measuring fluids
When measuring density in liquids containing conductive particles such as the carbon
particles of activated carbon or metal powder, density measurement may be affected by
 103 
6 F 8 A 0 5 2 1
conductive particles. Avoid using the density meter for the fluids like these. For details,
please contact Toshiba.
Material contacting liquid:
Main pipe: Stainless steel SCS14A (equivalent to 316SS)
Temperature detector holder: Stainless steel (SUS 316)
Applicator window : Polysulfone
Applicator window sealing material: Fluororubber (Viton)
Note: Do not apply this density meter to fluids that may corrode, deteriorate or degenerate
the above liquid contacting materials. Fore details, please contact Toshiba.
Applicators:
A pair of applicators provided for microwave reception/transmission
Temperature detector: RTD (resistance temperature detector) (Pt100)
Mounting style:
Vertical piping installation is recommended (Horizontal piping installation
is also possible. Refer to the Installation section.)
11.3 Conveter Specifications
Output signals:
Density measurement output: 4 to 20mADC (load resistance 750 Ω or less; insulated output)
Density meter fault or maintenance signal:
Semiconductor contact output capacitance 125VAC, 0.1A (resistive load)
The contact opens when in fault and closes otherwise.
* When the density meter converter is in error or in maintenance (setting change) mode,
the contact will be open.
Communication signals:
Digital signals are sent superimposed on the 4 to 20mADC signal line (based on the
HART*1 protocol).
*1 HART: Abbreviated from Highway Addressable Remote Transducer as the name of
an industrial sensor communications protocol recommended by HCF (HART
Communication Foundation).
Note: Various operations can be made from remote places by connecting the cable
terminals of a communication hand-held terminal (option) to the output
terminals of 4-20mADC signal. For the specification regarding the
communication hand-held terminal, refer to the AF100 specification.
Input signals
Externally synchronized input signal: No-voltage "a" contact
Use a contact with the capacitance of at least 24VDC and 1A.
This signal is used to take external synchronized operation with the flow of measured
substances including the pump operation.
Contact close: measurement implemented
Density correction factor switching signal: Voltage signal 2 points
Input voltage
H level: 20 to 30VDC
L level: 2VDC or less
Input resistance: Approx. 3kΩ
Using this signal, the density correction factor can be changed into 4 types of values from
remote places and measurements corresponding to 4 different objects to be measured or
 104 
6 F 8 A 0 5 2 1
4 kinds of mixed fluids (brands) of different component substances or compounding
ratios can be made.
Conductivity correction signal:
4-20mADC (corresponding to conductivity level of 0 to 10mS/cm)
To perform conductivity correction, prepare a conductivity meter and install it in a place
where conductivity can be measured correctly and steadily and enter the obtained
conductivity correction signal here.
Update cycle of density measurement output and display: Approx. 1 second
Moving average:
Density measured values are output as moving averages of 1 to 99
measurements made approximately every 1 second.
This output is used when the averaged output is required for density control
or other purpose.
Rate-of-change limit: Rate-of-change width: 0.00 to 9.99%TS, Count: 0 to 99
This is a function to limit a sudden output change by eliminating signals that
cause sudden output changes in such cases as when a sudden density
change occurs or air bubbles are mixed in the liquid to be measured. You
can set the condition of the rate-of-change limit using the rate-of-change
width and how many times the change occurs (count).
Additives correction function:
Capable of handling up to ten brands, this function performs the sensitivity
correction appropriate to the additives type and compound ratio in
accordance with the parameters that are registered in advance.
Arresters:
Mounted as standard on the current output and AC power supply lines.
Operation console (inside the converter):
Used for verifying, changing and manipulating various data.
Five control switches
Display: LCD of 4 lines by 20 characters (dot matrix)
Power supply:
100 to 240 VAC; 50/60 Hz
(Allowable power supply voltage: 85 to 264 VAC)
Power consumption: Approximately 25 VA(100VAC) ,
Approximately 35 VA(240VAC)
Case material:
Steel sheet
Finish:
Plyurethane finish
 105 
6 F 8 A 0 5 2 1
11.4 Model Number Table
Table 11.1 Model number table
Model number
12345
LQ 5 0 0
Specification code
Description
6 7 8 9 10 11 12
Density meter
Detector meter size
0 5
50 mm
0 8
80 mm
1 0
100 mm
1 5
150 mm
2 0
200 mm
2 5
250 mm
3 0
300 mm
Detector flange standard
JIS10K (JIS B 2238 10K) or equivalent
Equipment for ANSI 150
Equipment for DIN 10
Equipment for DIN 16
Equipment for BS 10
Use
Standard
For PED(for EU)(Note 1)
Liquid contacting specification
SCS14A cast(Equivalent to 316SS)pipe
(standard)
SCS14A cast(Equivalent to 316SS)pipe with
Teflon PFA coating for sticky application
SCS14A cast(Equivalent to 316SS)pipe for
abrasive application
Piping material: HasteloyC (Note 1)
Cable length
(dedicated cable between converter and
detector)
Standard (10m)
C 20 m
D 30 m
40 m
50 m
Note 1: The specification of PED(Pressure Equipment Directive)is required from 150 to 300 mm
When the installation location is in the Europe.
 106 
6 F 8 A 0 5 2 1
APPENDIX 1
● Attached Figure1. Detector outline dimensions
[Unit: mm]
The center of gravity
C: Bolt pitch circle
n: Number of bole holes
h: Bolt diameter
Enlarged view of B
 107 
6 F 8 A 0 5 2 1
External dimensions (Flange)
50
Std.
spec.
225
170
155
16
120
Appropriate bolt
size
(Diameter × length)
M16×60
80
225
200
185
18
150
100
240
220
210
18
150
260
270
280
22
200
290
320
330
250
315
300
300
340
50
Meter size
(mm)
JIS10K
ANSI150
DIN10
BS10
DIN16
n-Φh
Mass (kg)
4-19
Approx. 21
M16×65
8-19
Approx. 26
175
M16×65
8-19
Approx. 29
240
M20×75
8-23
Approx. 42
22
290
M20×75
12-23
Approx. 48
400
24
355
M22×80
12-25
Approx. 64
360
445
24
400
M22×85
16-25
Approx. 76
225
170
152.4
19.1
1.5
120.7
M16×60
4-19.1
Approx. 21
80
225
200
190.5
23.9
1.5
152.4
M16×70
4-19.1
Approx. 31
100
240
220
228.6
23.9
1.5
190.5
M16×70
8-19.1
Approx. 34
150
260
270
279.4
25.4
1.5
241.3
M20×80
8-22.4
Approx. 44
200
290
320
342.9
28.4
1.5
298.5
M20×80
8-22.4
Approx. 54
250
315
300
406.4
30.2
1.5
362.0
M22×90
12-25.5
Approx. 68
300
340
360
482.6
31.8
1.5
431.8
M22×90
12-25.4
Approx. 99
50
225
170
165
18
125
M16×60
4-18
Approx. 22
80
225
200
200
20
160
M16×70
8-18
Approx. 30
100
240
220
220
20
180
M16×70
8-18
Approx. 31
150
260
270
285
22
240
M20×80
8-22
Approx. 43
200
290
320
340
24
295
M20×80
8-22
Approx. 54
250
315
300
395
26
350
M22×90
12-22
Approx. 65
300
340
360
445
26
400
M22×90
12-22
Approx. 78
50
225
170
165
18
125
M16×60
4-18
Approx. 22
80
225
200
200
20
160
M16×70
8-18
Approx. 30
100
240
220
220
20
180
M16×70
8-18
Approx. 31
150
260
270
285
22
240
M20×80
8-22
Approx. 43
200
290
320
340
24
295
M20×80
12-22
Approx. 52
250
315
300
405
26
355
M22×90
12-26
Approx. 68
300
340
360
460
28
410
M22×90
12-26
Approx. 85
 108 
6 F 8 A 0 5 2 1
● Attached Figure2. Converter dimensions
[Unit: mm]
4-φ12 mounting holes
Converter communication port
Converter power
supply cable port
Contact signal
I/O (2) port
Contact signal I/O (1) port
Density signal output port
Grounding terminal
Rerserved
In the case of 50A mounting
In the case of wall mounting
Marine-use steel
pipe mounting U bolt
Steel pipe (50A)
 109 
APPENDIX 3
Microwave Density Meter LQ500 has been confirmed to comply with the requirements of the EMC
directive 89/336/EEC and the low voltage directive 93/68/EEC. And Microwave Density Meter of model
number LQ500******D** has been confirmed to comply with the requirements of the Pressure Equipment
directive 97/23/EC.
EMC directive
This device has been tested in a typical configuration in accordance with the following standards in an
industrial environment.
・Generic emission standard EN50081-2 : 1994
Radiated RF Emission
EN55011 Class A
Conducted RF Emission
EN55011 Class A
Limits for harmonic current emissions EN61000-3-2
・Generic immunity standard EN50082-2 : 1995
Radiated RF Immunity
ENV50140
Conducted RF Immunity
ENV50141
Radiated RF Immunity
ENV50204
Electrostatic Discharge Immunity
EN61000-4-2
Electrical Fast Transient Immunity
EN61000-4-4
Low voltage directive
Low voltage standards EN61010-1, /A2
Safety requirements for electrical equipment for measurement control and laboratory use (amended)
Over voltage category Ⅱ
Altitude Up to 2000m
Pressure equipment directive
Conformity assessment procedure : module H

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