Siemens Canada Siemens Milltronics Process Instruments LR400 SITRANS LR 400 User Manual sitranslrd3

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Instruction Manual September 2001

SITRANS LR 400

Safety Guidelines

Warning notices must be observed to ensure personal safety as well as that of others, and to

protect the product and the connected equipment. These warning notices are accompanied

by a clarification of the level of caution to be observed.

Qualified Personnel

This device/system may only be set up and operated in conjunction with this manual.

Qualified personnel are only authorized to install and operate this equipment in accordance

with established safety practices and standards.

Warning: This product can only function properly and safely if it is correctly transported,

stored, installed, set up, operated, and maintained.

Note: Always use product in accordance with specifications.

Instruments Inc. 2001. All Rights ReservedDisclaimer of Liability

This document is available in bound version and in

electronic version. We encourage users to

purchase authorized bound manuals, or to view

electronic versions as designed and authored by

Siemens Milltronics Process Instruments Inc.

Siemens Milltronics Process Instruments Inc. will

not be responsible for the contents of partial or

whole reproductions of either bound or electronic

versions.

While we have verified the contents of

this manual for agreement with the

instrumentation described, variations

remain possible. Thus we cannot

guarantee full agreement. The

contents of this manual are regularly

reviewed and corrections are included

in subsequent editions. We welcome

all suggestions for improvement.

Technical data subject to change.

Contact Technical Publications at the following address:

Technical Publications

Siemens Milltronics Process Instruments Inc.

1954 Technology Drive, P.O. Box 4225

Peterborough, Ontario, Canada, K9J 7B1

Email: techpubs@siemens-milltronics.com

For the library of SMPI instruction manuals, visit: www.siemens-milltronics.com

7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT i

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Table of Conetns

Table of Contents

General Information ...........................................................................................................1

The Manual ...............................................................................................................................................1

SITRANS LR 400 ......................................................................................................................................3

Structure ....................................................................................................................................................3

Specifications ......................................................................................................................4

SITRANS LR 400 ......................................................................................................................................4

Dimensions ...............................................................................................................................................8

Installation .........................................................................................................................11

Mounting Location ................................................................................................................................11

Electrical connection ............................................................................................................................13

Start Up ...............................................................................................................................15

Self-test ....................................................................................................................................................15

Multi-display ...........................................................................................................................................15

Local Programming ...............................................................................................................................15

Auto-Setup ..............................................................................................................................................15

Operation ............................................................................................................................16

General information ..............................................................................................................................16

Measuring principle .............................................................................................................................16

Operating the SITRANS LR 400 .........................................................................................................19

Changing a Parameter Value ..............................................................................................................20

Disabling and enabling programming ..............................................................................................22

Operating examples ..............................................................................................................................23

Parameters (HART) ...........................................................................................................25

Required Parameters ............................................................................................................................25

Additional Parameters .........................................................................................................................27

Parameters (Profibus PA) ................................................................................................53

Troubleshooting .................................................................................................................62

Classification of faults ..........................................................................................................................62

Self-test ....................................................................................................................................................62

Symptoms, causes and their remedy ...............................................................................................63

Fault messages ......................................................................................................................................64

Maintenance and repairs ................................................................................................65

Changing the device fuse ....................................................................................................................65

Disconnecting the electronics part from the mechanical part ..................................................66

Cleaning the antenna ...........................................................................................................................66

Certificates .........................................................................................................................67

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Table of Contents

Glossary ..............................................................................................................................68

Appendix I ..........................................................................................................................69

Alphabetical Parameter List ...............................................................................................................69

Appendix II .........................................................................................................................73

Programming Chart ...............................................................................................................................73

Appendix III ........................................................................................................................77

Ambient/Operating Temperature Specification .............................................................................77

Appendix IV ........................................................................................................................78

Process Pressure/Temperature de-Rating ......................................................................................78

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General Information

The Manual

Refer to this manual for proper installation, operation and maintenance of the SITRANS

LR 400 Radar Level Instrument.

Special attention must be paid to warnings and notices that are highlighted from the rest

of the text by grey boxes.

• These instructions do not claim to cover all details or variations in equipment, not to

provide for every possible contingency that may arise during installation, operation,

or maintenance.

• For further information or to resolve issues not covered in the manual, consult your

Siemens Milltronics representative.

• The contents of the manual shall not become part of or modify any prior or existing

agreement, commitment or relationship. The Sales Contract contains the entire

obligation of Siemens. The warranty contained in the contract between the parties

is the sole warranty of Siemens Milltronics.

Warning means that failure to observe the necessary precautions can result in death,

serious injury and/or considerable material damage.

Note means important information about the actual product or that part of the

operating manual to which particular attention should be paid.

Note: This equipment has been tested and found to comply with the limits for a Class

A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference when the equipment is

operated in a commercial environment. This equipment generates, uses, and can

radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause harmful interference

in which case the user will be required to correct the interference at his own expense.

WARNING: Changes or modifications not expressly approved by Siemens Milltronics

could void the user’s authority to operate the equipment.

IMPORTANT: All specifications are subject to change without notice.

Please ensure that any safety-related information is confirmed with a

qualified Siemens Milltronics representative.

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General Information

Qualified personnel

Qualified personnel are familiar with the installation, commissioning, and operation of

this equipment. In addition the person must be:

• trained and authorized to operate and service equipment/systems in accordance

with established safety procedures relating to electrical circuits, high pressures and

aggressive media.

• trained in the proper care and use of protective equipment in accordance with

established safety practices.

• trained in rendering first aid.

Warning:

• Installation shall only be performed by qualified personnel and in

accordance with local governing regulations

• The SITRANS LR 400 is to be used only in the manner outlined in this manual

or protection provided by equipment may be impaired.

7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 3

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General Information

SITRANS LR 400

The SITRANS LR 400 Radar Level Instrument is designed for level measuring of liquids and

solids in storage vessels. SITRANS LR 400 operates reliably with its high microwave

frequency even with poorly reflecting measuring media. The narrow antenna beam results

in a sharp radiation cone, therefore SITRANS LR 400 is quite insensitive to vessel

interferences.

Structure

The terminals for the power cable and the signal cable are behind the connection cover

(9) on the left hand side of the housing (1). The signal cable must be fed in from the right

through the cable glands (2).

The device can be separated into electronic and mechanical sections at the threaded

ring (5).

An optional temperature extension is positioned between the threaded ring (5) and the

flange (6). Refer to Dimension diagram on page 8.

The end of the antenna (7) must reach inside the vessel through the vessel nozzle (see

page 12).

Return the orientation of the housing to the same position with reference to the flange

after any servicing to ensure similar performance.

9Electronics section

Mechanical section

1 Housing

2 Cable gland

3 Electronics cover

4 Operating and

monitoring module

5 Threaded ring

6 Process Flange

7 Antenna

8 Intermediate flange

9 Connection cover

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Specifications

SITRANS LR 400

Power

• Power Supply 120 to 230 Vac, ±15%, 50/60 Hz, 6W (12VA)

24 Vdc, +25/-20%, 6W

Power failure: bridge of at least 1 mains period (> 20 ms)

Fuse

• Fuse (both ac and dc versions)

SI1 Fast acting ceramic, 4 x 20 mm, 1A, 250 Vac

SI2 Slow-Blow, 4 x 20 mm, 0.63 A, 250 Vac

Interface

• Analog output (Not applicable to Profibus PA option)

Signal range 4 to 20 mA

Upper Limit 20 to 22.5 mA adjustable

Fail signal 3.6 mA; 22 mA; 24 mA or last value

Load Max. 600 Ω, for HART communication min. 230 Ω

• Digital Output

Function Configurable as a device status or limit value

(level, volume)

Signal type Relay, either NCC or NOC function

max. DC 50 V, max. 200 mA, rating max. 5 W.

Self-resetting fuse, Ri = 9 Ω

• Electrical Isolation Outputs electrically isolated from the power supply and

from each other

• Display LCD, two lines of 16 characters each,

configurable for the following displays:

level, volume, amplitude, digital output,

temperature, validity, signal-to-noise ratio

Multi–display: 2 freely selectable measured values are

displayed simultaneously

•Operation4 optical control elements, finger activated, menu-guided

Note: Siemens Milltronics makes every attempt to ensure the accuracy of these

specifications, but reserves the right to change them at any time. Please ensure these

are the most recent specifications. Contact your representative, or check our website

at www. milltronics.com for the most up-to-date information.

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Specifications

Mechanical

• Nominal sizes DIN DN 80 DN 100 DN 150

ANSI 3" 4" 6"

JIS 80 mm 100 mm 150 mm

• Pressure classes

DIN PN16 PN40

ANSI 150 lb 300lb

JIS 10K

Flange

• Process Connection Flange DIN 2527, ANSI B16.5, or JIS B2238 equivalent bolt

pattern

• Materials of the wetted Stainless steel, material–no. 1.4571 and 1.4581, PTFE

parts –in contact with (or glass/PTFE, Zone 0 and Zone 20 devices)

the process

Enclosure

• construction Die-cast aluminum, painted

• conduit M20 (cable diameter 6 to 9.5 mm[0.24 to 0.37"])

or ½”-14 NPT

• ingress protection Type 4X/NEMA 4X, Type 6/NEMA 6, IP 671

Weight

• Weight of unit and flange

1.Use only approved, suitable sized hubs for watertight applications.

Flange Pressure Class Size Weight

DIN 2527 PN 16 DN 80 11.9 kg (26.1 lbs)

DN 100 13.2 kg (28.9 lbs)

DN 150 19.2 kg (42.1 lbs)

PN 40 DN 80 12.9 kg (28.4 lbs)

DN 100 15.5 kg (34.1 lbs)

DN 150 24.1 kg (43.1 lbs)

ANSI B 16.5 150 lb 3" 12.2 kg (26.8 lbs)

4" 14.8 kg (32.5 lbs)

6" 20.1 kg (44.2 lbs)

300 lb 3" 14.3 kg (31.5 lbs)

4" 20.2 kg (44.4 lbs)

6" 31.8 kg (69.9 lbs)

JIS B2238 10K 80 mm 11.9 kg (26.1 lbs)

100 mm 13.2 kg (28.9 lbs)

150 mm 19.2 kg (42.1 lbs)

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Specifications

Environmental

location: indoor/outdoor

altitude: 2000 m max

ambient temperature: -40 to 65°C (-40 to 149°F)

relative humidity: suitable for outdoor (Type / Nema 4X, 6/ IP67)

installation category II

pollution degree 4

• *Process Temperature -40 to 140°C (-40 to 284°F),optional -40 to 240°C

(-40 to 482°F)

• Electromagnetic compatibility

Spurious emission according to EN 50 081

Interference strength according to EN 50 082 and NAMUR

• *Perm. ambient -40 to 65°C (-40 to 149°F) (non-hazardous version)

temperature -20 to 65°C (-4 to 149°F) (hazardous version)

LCD: -10 to 55 °C (14 to 131°F)

Observe the temperature classes in hazardous areas!

• Perm. storage -30 to 80°C (-22 to 176°F),

temperature

Approvals (verify against device nameplate)

• Explosion Protection Certificate No. PTB 00 ATEX 1024

** Refer to device II 1/2G EEx d IIC T6II 2G EEx d IIC T6

nameplate II 1/2G EEx dem IIC T6II 2G EEx dem IIC T6

II 1/2G EEx dem [ib] IIC T6II 2G EEx dem [ib] IIC T6

II 1/2G EEx dem [ia] IIC T6II 2G EEx dem [ia] IIC T6

Certificate No. DMT 01 ATEX E 038

II 1/2 D IP 65 (dust zone 20, zone 21 approval)

• General FM, CSA

approval pending

• Radio FCC, Industry Canada, European Radio

approval pending

Comunication

• Communication:HART

Load 230 to 600 Ω, 230 to 500 Ω when connecting a coupling

module

Line two-wire shielded: ≤ 3 km

multi-wire shielded: ≤ 1.5 km

Protocol HART, Version 5.1

*Note: Refer to Process/Ambient de-rating curves in Appendix III.

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Specifications

Communication: Profibus PA

Protocol Layer 1 and 2 Profibus PA,

technology: IEC 61158-2, slave-functionality

Device Class B

Device Profile 3.0

• PC/Laptop requirements IBM-compatible

RAM ≥ 64 Mbytes

Hard disk ≥ 100 Mbytes

RS 232-C interface

VGA graphic card (≥ 640 x 480)

• Software for PC/Laptop Windows 95/98 or NT 4.0

SIMATIC PDM

Performance

Measured value error (under reference conditions)

• Measuring error ≤ ± 15 mm at 0.26 to 2 m distance

≤ ± 5 mm at 2 to 10 m distance

≤ ± 15 mm at 10 to 45 m distance

(see diagram below)

• Dead zone 0-26 cm from bottom edge of flange

• Additional contribution of ≤ 0.1 % of the measured value

Analog Output ≤ 0.05 % of full scale

• Additional Contribution of ≤ 0.05 % per 10 % deviation of UN

the Supply Voltage

• Influence of pressure ≤ 0.3 % to 10 bar without pressure correction

(air, 20°C) ≤ 2 % at 10 to 64 bar without pressure correction

• Long-term stability ≤ ± 1 mm/year

• Repetitive accuracy ≤ ± 1 mm at 0 to 45 m, damping ≥ 1 s

• Reference conditions

Medium Triple reflector on the main axis of the antenna main lobe

Ambient temperature 25 ± 5°C (77 ± 9°F)

Ambient pressure 1050 mbar ± 10 %

Absolute Measuring Error

Absolute measuring error [mm]

10 20 30 40

Distance from flange [m]

452

-20

-15

-10

-5

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Specifications

Dimensions

Flange acc. to DIN 2527 / ANSI B

16.5 / JIS B 2238 bolt hole pattern

optional

temperature

extension

409 mm

(16.1")

281 mm

(11.1")

191 mm

(7.5") or

238 mm

(9.4")

72 mm (2.8") or

98 mm (3.9")

153 mm

(6.0")

62 mm

(2.4")

73 mm

(2.9")

84 mm

(3.3")

204 mm

(8.0")

Customer to provide adequate bolting and gasket to

retain vessel pressure and provide sufficient seating.

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Specifications

DIN / JIS Flat Face Flange Diagram

Flange according to DIN 2527 (see Flange Diagram on page 9)

Flange according to JIS B 2238

Pipe

Size Flange

O.D. Thickness

(s) Bolt Hole

Circle Ø Bolt Hole

ØNumber of

Bolts

80 mm PN 16 200 mm 20.0 mm 160 mm 18.0 mm 8

100 mm PN16 220 mm 20.0 mm 180 mm 18.0 mm 8

150 mm PN 16 285 mm 22.0 mm 240 mm 22.0 mm 8

80 mm PN 40 200 mm 24.0 mm 160 mm 18.0 mm 8

100 mm PN 40 230 mm 24.0 mm 190 mm 22.0 mm 8

150 mm PN 40 300 mm 28.0 mm 250 mm 26.0 mm 8

Pipe

Size Flange

O.D. Thickness

(s) Bolt Hole

Circle Ø Bolt Hole

ØNumber of

Bolts

80 mm 10 K 185 mm 20.0 mm 150 mm 19.0 mm 8

100 mm 10 K 210 mm 22.0 mm 175 mm 19.0 mm 8

150 mm 10 k 280 mm 24.0 mm 240 mm 23.0 mm 8

Bolt Hole Ø

Thickness (s)

Flange O.D.

Bolt Hole Circle Ø

horn mounting holes

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Specifications

ANSI Raised Face Flange Diagram

Flange according to ANSI B 16.5 (see Flange Diagram on page 9)

Pipe

Size Flange

O.D. Thickness

(s) Face

O.D. Bolt Hole

Circle Ø Bolt Hole

ØNumber of

Bolts

3" 150 # 7.50" 0.941" 5.0" 6.00" 0.74" 4

4" 150 # 9.00" 0.941" 6.19" 7.50" 075" 8

6" 150 # 11.00" 1.00" 8.5" 6.62" 0.88" 8

3" 300 # 8.25" 1.12" 5.0" 6.62 0.88" 8

4" 300 # 10.00" 1.25" 6.19" 7.88" 0.88" 8

6" 300 # 12.51" 1.44" 8.5" 10.62" 0.88" 12

Thickness (s)

Raised Face thickness

0.063" (mm)

Bolt Hole Ø

horn mounting holes

Flange O.D.

Bolt Hole Circle Ø

Face O.D.

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Installation

Mounting Location

• Do not mount in direct sunlight without the use of a sun shield. Refer to Appendix III

(Ambient/Operating Temperature Specfication) on page 77.

Note:

• The SITRANS LR 400 is rated for Type 4X/NEMA 4X, Type 6/NEMA 6, IP 67.

Follow all installation and operating instructions to meet the requirements

of this type of protection. Use only approved, suitable sized hubs for

watertight applications.

• Observe all maximum permissible ambient and process temperatures.

Refer to Appendix III (Ambient/Operating Temperature Specification).

• Provide a warning sign and/or touch guard if the surface of the measuring

instrument can get hotter than 70°C in use.

Warning: For vessels with conical or parbolic tops, avoid mounting the

unit at the center. The concavity of the top can focus echoes into the centre,

giving false readings.

Mount the unit more than 1 m away from the vessel walls, pipes and other

assemblies as well as the filling stream because all these influences will become

noticeable as reflective interference. Align the antenna so that the radar cone hits

the surface of the measuring medium as vertically as possible

Flat

Coni cal

P a ra b o lic

Conical

Parabolic

Flat

is preferred

location

is acceptable

location

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Installation

Correct Installation in Mounting Nozzle

The bottom edge of the antenna must reach inside the vessel to avoid reflective

interference at the wall of the nozzle. Above flange size DN 150/6 inch, the antenna may

end in the nozzle unless the radiation cone (the extension of the antenna’s angle) touches

the nozzle wall.

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Installation

Electrical connection

AC version:

• The equipment must be protected by a 15A fuse or circuit breaker in the building

installation.

• A circuit breaker or switch in the building installation, marked as the disconnect

switch, shall be in close proximity to the equipment and within easy reach of the

operator.

All field wiring must have insulation suitable for at least 250 V.

DC version:

• DC input terminals shall be supplied from an SELV source in accordance with IEC

1010-1 Annex H.

1264 5

378

Rated temperature of

connection cables must

exceed maximum ambient

temperature by at least 15 K

PROFI-

BUS PA

Hart Wiring Profibus Wiring

1264 5

378

Rated temperature of

connection cables must

exceed m aximum ambient

temperature by at least 15 K

earth terminal

earth

terminal

cable clamp cable clamp

1264 5

378

19-3 0 V

Rated temperature of

connection cables must

exceed maximum ambient

temperature by at least 15 K

12645378

PROFI-

BUS PA

19- 30 V

Rated temperature of

connection cables must

exceed maximum ambient

temp erature by at leas t 15 K

Hart Wiring Profibus Wiring

earth terminal earth

terminal

cable clamp cable clamp

Note (AC and DC versions):

• 4-20 mA, Profibus PA, DC input circuits, 14 - 20 AWG, shielded copper wire

• AC input circuit, min 14 AWG copper wire

• Recommended torque on terminal clamping screws, 0.5 - 0.6 Nm

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Installation

Make the electrical connections as follows:

1. Release the cover lock on the connection box with a 3 mm Allen key.

2. Unscrew the cover from the connection box.

3. Push the power cable and signal cable through the cable gland on the right of the

unit., up to the terminal strip. Lay the cable in a bend before the cable gland so that

moisture cannot enter the connection box.

4. Connect the earth conductor of the power supply to the earth terminal in the

connection box. Choose a length of cable so that the earth conductor is

disconnected last when you pull the cable.

5. In devices with ignition protection types II 1/2G EEx dem [ia] IIC T6 and II 1/2G EEx

dem [ib] IIC T6 or II 2G EEx dem [ia] IIC T6 and II 2G EEx dem [ib] IIC T6, mount the

cover for the power supply terminals.

6. Tighten the cable screw gland and check the strain relief (pull and turn).

7. In devices with ignition protection type II 1/2G EEx D IIC T6 or II 2G EEx d IIC T6,

replace unused screw-type cable glands with a certified dummy plug.

8. Screw the cover onto the housing and tighten it without using a tool. The sealing

ring must be clean and undamaged.

9. Mount the cover lock of the connection box cover.

10. Connect the earth terminal located between the screw-type cable glands to a

ground connection at your vessel by using a cable of a cross-section at least

2.5 mm2 wide.

For error-free communication via the HART protocol, a load of at least 230 Ω must be

available in the signal circuit.

Warning: To avoid short-circuits, do not connect a load resistance with

bare wires in the connection box.

The housing cover may not be unscrewed in a hazardous area when the

device is under voltage (power supply, digital outputs on external

supply).

In devices with ignition protection types II 1/2G EEx dem [ia] IIC T6 and

II 1/2G EEx dem [ib] IIC T6 II 2G EEx dem [ia] IIC T6 and

II 2G EEx dem [ib] IIC T6, only the cover of the connection box may be

unscrewed for test purposes. The cover on the power supply terminals

may not be removed!

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Start Up

Self-test

The device performs a self-test after switching on the power supply. It is ready for

operation and programming when the LCD displays the multi-display and the control

elements can be operated.

Multi-display

The multi-display shows on the LCD after a successful self-test with the output of the

level in the first line and the signal-to-noise ratio in the second line (factory setting):

Local Programming

When the mult-display shows on the LCD, you are ready to begin local programming

using the optical control elements. To access the parameter settings, touch the

element once. "Main Menu" is displayed in the first line of the LCD. Then program the unit

beginning with the Auto-Setup parameters.

Auto-Setup

After switching on the SITRANS LR 400, and after a successful self test, set the Auto-

Setup parameters to make the system operational.: (see page 25).

• The language of the local user interface (English or Deutsch)

• The unit of length of the measured level

• The nozzle height in the selected unit of length

•The vessel height in the selected unit of length)

• The LRV as a distance from the bottom of the vessel

• The URV as a distance from the bottom of the vessel

• The damping of the measured level in s.

• The application type

• The bus-address by Profibus PA communication (on Profibus models)

Enter the necessary values as described in "Parmeters" on page 25.

If the multi-display does not appear or displays incorrect measured values after Auto-

Setup, proceed as described in “Troubleshooting” on page 62.

Refer to the Parameter section that begins on page 25 for a list of available parameters.

Note: Frequent switching off and on of the devices causes aging of the electronics

(see Parameter 3.1).

+1 2 30 0 m

bd03+

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Operation

General information

You can operate the SITRANS LR 400 with:

• Local operating and monitoring module

• HART-Communicator or Profibus PA

• PC/Laptop and SIMATIC PDM software (recommended)

Measuring principle

The SITRANS LR 400 operates according to the FMCW (Frequency Modulated Continuous

Wave) method. Its antenna sends microwaves to the surface of the measuring medium,

the frequency of which is modulated continuously (see “Determining the Differential

Frequency on page 17). A receiver registers the reflection at the surface of the measuring

medium and links it with the simultaneously radiated signal.

The propagation speed of microwaves in gases corresponds to the speed of light. The

distance

is therefore proportional to the propagation time

d= distance, t = measured time, c = speed of light

Note: The device can be operated and programmed most comfortably with the

SIMATIC PDM software. This software gives you the added possibility of saving and

archiving your application-specific parameters and copying them back into the device

if necessary.

It is best to perform the operations described in the following sections directly on the

device to familiarize yourself with the operation.

dct⋅

--------=

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Operation

Since the transmission signal has changed its frequency until the reception signal arrives,

the link gives a differential frequency

, which is proportional to the distance

from the

reflecting surface.

The distance

is given by the ratio of the differential frequency

to the frequency

deviation

and the duration of a frequency modulation phase

(see“Determining the

Differential Frequency” on page 17):

B = bandwidth (frequency deviation), d = distance, T = modulation duration,

c = speed of light

Determining the Differential Frequency

Example

The linear frequency deviation is 200 MHz at a modulation duration of 10 ms. The surface

of the measuring medium is 10 m away from the transmitting antenna. The difference

signal then has a frequency of:

Every reflection at a surface generates a different frequency. The reception signal

therefore consists of a frequency mix from which the disturbance frequencies must be

filtered which are caused by fixed targets such as struts inside the vessel.

2Bd⋅⋅

Tc⋅

------------------ d,fdTc⋅⋅

-------------------==

time

Frequency

transmission

signal

reception

signal

2210

810⋅⋅ ⋅

10 3– 310

⋅⋅

---------------------------------- 13 333kHz,==

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Operation

The electrical connection of the PC/Laptops and the HART-Communicator to the 4-20-mA

signal cable is shown below.

Connection, HART Schematic Diagram

Connection, Profibus Schematic Diagram

Warning: The coupling module (shown below) may not be used in areas

where there is an explosion hazard and may not be connected to

intrinsically safe circuits.

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Operation

Operating the SITRANS LR 400

To access parameters, use the optical control elements on the operating and monitoring

module (shown below). Touch the glass in the appropriate place with your fingertips like

on a touch screen. The two-line LCD displays the parameters. You can alter the setting or

change to other parameters using the controls.

Operating and Monitoring Module

Selecting a Parameter

The first line of the display tells you the current operating level. The second line indicates

one of the parameters you can access under the parameter group. If the level offers more

than one parameter, you can have them displayed in cyclic order by using the control

elements (forwards) and (backwards). The control element accesss the

parameter currently displayed on the second line. The fourth control element, , closes

this parameter and moves up one level until you return to the multi-display.

When you select a parameter, the device displays the parameter's current value in the

second line. When the value flashes, the device programming is enabled (see “Disabling

and enabling programming” on page 22) and you can change the current setting. There

are two different ways of changing the settings, which are explained in the following

sections.

LCD

Two lines of 16 characters each

Optical control element

Note: The background illumination of the LCD switches on automatically as soon as

you use a control element. It goes out about three minutes after last use of a control

element.

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Operation

Structure of Parameters

Operation is hierarchically structured: The parameters are arranged in logical parameter

groups and assigned a numerical menu identification (see below).

Changing a Parameter Value

Entering Value from Selection List

In many cases, the device offers a number of entries in a selection list which you can

assign to a parameter. For these functions, you cannot enter anything other than a

selection from the displayed list.

You will see a single item of the selection list in the second line of the display.

• Change the display cyclically forwards or backwards with the control elements

or to select the desired entry from the list.

The control element operates like an “Enter” key: Use it to assign the displayed

list entry to the parameter. The device accepts the new setting, closes the input and

switches back to the next operating level up.

• The control element operates like a “Cancel” key: As soon as you press it, the

device closes the parameter input but retains the originally displayed value: It does

not save a changed setting!

For an example of assigning a value from a selection list, see “Operating examples” on

page 23.

Function group

2 Display

2. Display

1 Multi-display

2. Display

2 Level

2. Display

3 Volume

Function group

3 Diagnostics

Function group

4 Device data 4. Device Data

1 Units

4. Device Data

2 Operating parameters

4. Device Data

3 Analog output

4. Device Data

4 Digital output 4.4. Digital output

1 Function DO

4.4. Digital output

2 Signal type DO

4.4. Digital output

3 Level param.

Operating level 1

Operating level 2

Operating level 3

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Operation

Entering Manual Value

If the device allows manual input of the displayed parameter, the control elements

operate like a cursor control. The current input position is marked by flashing of a single

character.

• The control elements and change the character’s value by one up or

down. For numeric values the character changes to the next digit up or down, for

signs between + and -, and for text inputs to the next element of the ASCII character

set.

• Use the control element to move the input position to the right. At the extreme

right position, press again: Here the control element operates like an “Enter”

key. The device saves the changed value (if it is within the permissible input range –

otherwise an error message appears on the operating and monitoring module!) and

closes the parameter input.

• Use the control element to move the input position to the left. At the extreme left

position, press again: The control element now functions as a “Cancel” key. The

device close the parameter input without saving the changed value.

If you exceed the representable value range when entering a digit, SITRANS LR 400

automatically places the numeric value at the next highest position. For example, if you

see the numeric value “0.9” on the display and press the control element , the display

does not change to “0.0” but to “1.0”. Value “9” becomes “10”, value “90” or “99”, “100”

(depending on whether you have set the input position to the second or first “9”), etc. The

device adds further places before the decimal point automatically!

This input system also works in the opposite direction: If, for example, the value “100” is

displayed and you use the control element on the first or second “0”, the numeric

value changes to “90” or “99” and the device cancels the places in front of the decimal

point which are no longer required. Leading zeros are not displayed.

You can also set the cursor to the decimal point (unless an integer value is currently

being displayed). The control elements or then immediately multiply or divide

the displayed value by 10. The necessary additional places in front of the decimal point

appear. However, you cannot change the number of displayed decimal places; they

always remain the same.

Display text assigned to a parameter may sometimes be longer than the field of the

display. An arrow pointing outward on the right or left hand side of the display line

indicates that the text continues outside the display. You can move the text with the

control elements and by moving the pointer past the end of the line allowing you to

read the rest of the text.

An example of manual input of a value is described in “Operating examples” on page 23,

example 2.

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Operation

Disabling and enabling programming

To prevent unauthorized personnel causing programming errors via the operating and

monitoring module, set a customer code – a personal, freely selectable code number

which may be up to 9 characters long. A device protected by a customer code still

displays all functions and values but it requests input of the code number before allowing

a parameter to be reset.

Programming is enabled when you:

• enter the requested customer code for the current parameter (only the current

parameter is enabled for reprogramming. All the others are still waiting for input of

the customer code).

• or release the programming lock for all parameters at once in the “Code Input”

function (see Parameter 5.1 on page 52).

Both ways will release the programming lock on parameters for approx. 10 min.

When you return to the multi-display or enter a number in the “Code Input” function

which is different to the customer code, or do not operate the device for 10 minutes, the

programming lock is enabled.

Enter the customer code as described in Parameter 5.2 on page 52.

Note: If the customer code is “0” in Parameter 5.2, programming of parameters is

always enabled.

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Operation

Operating examples

Example 1(HART)

The length unit should be changed from “m” to “mm.”. The starting point is the multi-

display.

Follow the path traced with a bold line in the diagram above for input. The other paths

lead to other device functions and parameters which are not required in this example.

Next to the operating path, the control elements which you need to press are indicated

and the operating steps are numbered.

2 x

Function group

4 Device data

Function group

3 Diagnostics

Function group

1 Auto-Setup

Function group

2 Display

+12,300 m

+30 dB

4. Device data

1 Units 4.1 Units

1 Length unit

4. Device data

2 Operating param.

4. Device data

3 Analog output 4.3 Analog output

1 AO select

4.3.1 AO select

Level

4.3 Analog output

2 Level param.

4.3.2 Level param.

1 Level URV

4.1.1 Length unit

Multi display

2 x

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Operation

Example 2

The filling speed should be changed from 2.0 cm/min to 100 cm/min.

Access the “Fill speed” parameter from the multi-display according to instructions on

page page 19.

The default setting appears in the display

Enable the programming.

The second segment of the second display

line flashes.

Set the digit to 1 with the control element.

Select the decimal point with the control

element.

Press the control element twice so that

two other places appear in front of the decimal

point.

Select the last decimal place with

And end the input with the control element

(Enter function)