Siemens Sitrans LR250 User manual

Radar Transmitters
Operating Instructions 06/2010
SITRANS LR250 (FOUNDATION FIELDBUS)
SITRANS

© Siemens Milltronics Process Instruments Inc. 2010
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.
Unit Repair and Excluded Liability:
•The user is responsible for all changes and repairs made to the device by the user or the user’s
agent.
•All new components are to be provided by Siemens Milltronics Process Instruments Inc.
•Restrict repair to faulty components only.
•Do not reuse faulty components.
Warning: Cardboard shipping package provides limited humidity and moisture protection. This product
can only function properly and safely if it is correctly transported, stored, installed, set up, operated, and
maintained.
This product is intended for use in industrial areas. Operation of this equipment in a residential area
may cause interference to several frequency based communications.
Note: Always use product in accordance with specifications.
Copyright Siemens Milltronics Process
Instruments Inc. 2010. All Rights Reserved
Disclaimer 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.
Please check the website shown below for the
latest manual revisions.
We welcome all suggestions for improvement.
Technical data subject to change.
MILLTRONICS®is a registered trademark of Siemens Milltronics Process Instruments Inc.
Contact SMPI Technical Publications European Authorized Representative
at the following address:
Technical Publications Siemens AG
Siemens Milltronics Process Instruments Inc. Industry Sector
1954 Technology Drive, P.O. Box 4225 76181 Karlsruhe
Peterborough, Ontario, Canada, K9J 7B1 Deutschland
Email: [e-mail]
•For a selection of Siemens Milltronics level measurement manuals, go to:
www. siemens.com/level. Choose Instructions and Manuals under the More Info list.
•For a selection of Siemens Milltronics weighing manuals, go to:
www. siemens.com/weighing. Choose Support, and then Manuals / Operating Instructions.

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Table of Contents
Table of Contents
Table of Contents .................................................................................................................i
Safety Notes .............................................................................................................................................1
Safety marking symbols ..............................................................................................................1
FCC Conformity ........................................................................................................................................1
CE Electromagnetic Compatibility (EMC) Conformity ....................................................................2
Industry Canada ......................................................................................................................................2
The Manual ...............................................................................................................................................3
Application Examples ...................................................................................................................3
Technical Support ....................................................................................................................................3
Abbreviations and Identifications .............................................................................................4
SITRANS LR250 Overview ................................................................................................. 6
Specifications ......................................................................................................................7
Threaded Horn Antenna with extension ...............................................................................12
Flanged Horn ................................................................................................................................13
Raised Face Flange per EN 1092-1 .........................................................................................14
Flat Faced Flange ........................................................................................................................16
Installation ......................................................................................................................... 18
Pressure Equipment Directive, PED, 97/23/EC ...............................................................................19
Nozzle design ...............................................................................................................................19
Nozzle location .............................................................................................................................19
Orientation in a vessel with obstructions .............................................................................20
Mounting on a Stillpipe or Bypass Pipe ................................................................................20
Installation Instructions .......................................................................................................................21
Wiring ..................................................................................................................................22
Power .......................................................................................................................................................22
Connecting SITRANS LR250 ...............................................................................................................22
Basic Configuration with Foundation Fieldbus (H1) ...........................................................23
Wiring Setups for hazardous area installations ............................................................................24
Configuration with Foundation Fieldbus for hazardous areas ........................................24
Instructions specific to hazardous area installations ..................................................................29
Quick Start ..........................................................................................................................30
Activating SITRANS LR250 .................................................................................................................30
The LCD Display ...........................................................................................................................31
Handheld Programmer ...............................................................................................................32
Programming SITRANS LR250 .................................................................................................33
Quick Start Wizard via the handheld programmer .......................................................................36
Auto False Echo Suppression ............................................................................................................38
Requesting an Echo Profile ................................................................................................................38
Device Address ......................................................................................................................................38
Level application example ...................................................................................................................39
Operating via AMS Device Manager ............................................................................40
Functions in AMS Device Manager .................................................................................................40

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Table of Contents
Key Features of AMS Device Manager Rev. 9.0 ............................................................................41
Adding a new device ............................................................................................................................42
Electronic Device Description (EDD) ......................................................................................42
Master Reset ................................................................................................................................44
Scan Device ..................................................................................................................................44
Sensor calibration .......................................................................................................................44
Configuring a new device ...................................................................................................................44
Quick Start Wizard via AMS Device Manager ....................................................................45
Changing parameter settings using AMS Device Manager ......................................................49
Configure/Setup (Level Transducer Block-LTB) ............................................................................49
Identification (LTB) ......................................................................................................................49
Operation (LTB) ............................................................................................................................50
Setup (LTB) ....................................................................................................................................51
Linearization (LTB) .......................................................................................................................53
Signal Processing (LTB) .............................................................................................................55
Maintenance & Diagnostics (LTB) ..........................................................................................59
Communication (LTB) .................................................................................................................62
Configure/Setup (Liquid Crystal Display Block-LCD) ....................................................................63
Identification (LCD) .....................................................................................................................63
Operation (LCD) ............................................................................................................................63
Setup (LCD) ...................................................................................................................................64
Communication (LCD) .................................................................................................................64
Configure/Setup (Diagnostic Transducer Block-DIAG) ...............................................................65
Identification (DIAG) ...................................................................................................................65
Operation (DIAG) .........................................................................................................................65
Communication (DIAG) ..............................................................................................................65
Configure/Setup (Resource Block - RESOURCE) ..........................................................................66
Identification (RESOURCE) ........................................................................................................66
Wizards (RESOURCE) .................................................................................................................67
Operation (RESOURCE) ..............................................................................................................67
Maintenance & Diagnostics (RESOURCE) ............................................................................69
Communication (RESOURCE) ...................................................................................................72
Security (RESOURCE) .................................................................................................................72
Device Diagnostics (Level Transducer Block - LTB) .....................................................................73
Alarms & Errors (LTB) ................................................................................................................73
Extended Diagnostics (LTB) ......................................................................................................76
Device Diagnostics (Liquid Crystal Display Block - LCD) ............................................................76
Alarms & Errors (LCD) ................................................................................................................76
Device Diagnostics (Diagnostic Transducer Block - DIAG) ........................................................76
Alarms & Errors (DIAG) ..............................................................................................................76
Device Diagnostics (Resource Block - RESOURCE) .....................................................................77
Alarms & Errors (RESOURCE) ..................................................................................................77
Extended Diagnostics (RESOURCE) .......................................................................................78
Process Variables (Level Transducer Block-LTB) .........................................................................79
Password Protection ............................................................................................................................80
User Manager utility ...................................................................................................................81
AMS Menu Structure ...........................................................................................................................82
Parameter Reference (LUI) ..............................................................................................96
Quick Start .................................................................................................................................. 97
Setup ............................................................................................................................................ 97

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Table of Contents
Identification..................................................................................................................... 97
Device ................................................................................................................................ 97
Sensor................................................................................................................................ 97
Linearization .................................................................................................................. 101
Signal Processing......................................................................................................... 104
AIFB 1.............................................................................................................................. 113
AIFB 2.............................................................................................................................. 116
Measured Values......................................................................................................... 116
Diagnostics .............................................................................................................................. 117
Echo Profile.................................................................................................................... 117
Fault Reset ..................................................................................................................... 117
Electronics Temperature ............................................................................................ 118
Peak Values................................................................................................................... 118
Service...................................................................................................................................... 119
Master Reset................................................................................................................. 119
Remaining Device Lifetime ........................................................................................ 120
Remaining Sensor Lifetime........................................................................................ 121
Service Schedule ......................................................................................................... 123
Calibration Schedule ................................................................................................... 125
Manufacture Date........................................................................................................ 127
Powered Hours............................................................................................................. 127
Power-on Resets.......................................................................................................... 127
LCD Fast Mode.............................................................................................................. 127
LCD Contrast.................................................................................................................. 127
Secondary Value .......................................................................................................... 128
Simulate Enable............................................................................................................ 128
Communication....................................................................................................................... 128
Tag ................................................................................................................................... 128
Device Address............................................................................................................. 128
Manufacturer ................................................................................................................ 128
Device Type Identification.......................................................................................... 129
Device Revision ............................................................................................................ 129
ITK Version..................................................................................................................... 129
Security..................................................................................................................................... 129
Remote Access............................................................................................................. 129
Local Access ................................................................................................................. 129
Language.................................................................................................................................. 130
Appendix A: Alphabetical Parameter List .................................................................. 131
Appendix B: Troubleshooting ....................................................................................... 135
Device Status Icons ............................................................................................................................136
General Fault Codes ...........................................................................................................................138
Operation Troubleshooting ...............................................................................................................142
Appendix C: Maintenance ............................................................................................ 144
Unit Repair and Excluded Liability ..................................................................................................144
Replacing the antenna .............................................................................................................144
Appendix D: Technical Reference ............................................................................... 145
Principles of Operation ......................................................................................................................145

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Table of Contents
Echo Processing ..................................................................................................................................145
Process Intelligence .................................................................................................................145
Echo Selection ...........................................................................................................................146
Measurement Range ................................................................................................................149
Measurement Response ...................................................................................................................150
Damping .................................................................................................................................................150
Loss of Echo (LOE) ...............................................................................................................................150
LOE Timer ....................................................................................................................................151
Maximum Process Temperature Chart ..........................................................................................151
Process Pressure/Temperature derating curves .........................................................................152
Pressure Equipment Directive, PED, 97/23/EC .............................................................................152
Horn Antenna or Wave Guide ................................................................................................153
Appendix E: Application Examples ............................................................................. 156
Liquid resin in storage vessel, level measurement .....................................................................156
Horizontal vessel with volume measurement ..............................................................................157
Application with Stillpipe ...................................................................................................................158
Appendix F: Communications via Foundation Fieldbus (FF) .................................. 160
Field Communicator 375 (FC375) ............................................................................................160
Appendix G: Firmware Revision History .................................................................... 161
Index .................................................................................................................................. 162
Glossary ............................................................................................................................ 165
LCD Menu Structure ...................................................................................................... 169

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 1
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SITRANS LR250 (FF)
Safety Notes
Special attention must be paid to warnings and notes highlighted from the rest of the text
by grey boxes.1)
Safety marking symbols
FCC Conformity
US Installations only: Federal Communications Commission (FCC) rules
WARNING: relates to a caution symbol on the product, and means
that failure to observe the necessary precautions can result in death,
serious injury, and/or considerable material damage.
WARNING1: 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 product or that part of the operating
manual.
1) This symbol is used when there is no corresponding caution symbol on the product.
In manual On
product Description
Earth (ground) Terminal
Protective Conductor Terminal
(Label on product: yellow background.) WARNING: refer
to accompanying documents (manual) for details.
WARNING: Changes or modifications not expressly approved by
Siemens Milltronics could void the user’s authority to operate the
equipment.
Notes:
• 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 to radio communications, in which case
the user will be required to correct the interference at his own expense.

Page 2 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
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SITRANS LR250 (FF)
CE Electromagnetic Compatibility (EMC) Conformity
This equipment has been tested and found to comply with the following EMC Standards:
Industry Canada
a) Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.
b) This device shall be installed and operated in a completely enclosed container to
prevent RF emission which otherwise can interfere with aeronautical navigation.
Installation shall be done by trained installers, in strict compliance with the
manufacturer’s instructions.
c) The use of this device is on a “no-interference, no-protection” basis. That is, the
user shall accept operations of high-powered radar in the same frequency band
which may interfere with or damage this device. On the other hand, level probing
devices found to interfere with primary licensing operations will be required to be
removed at the user’s expense.
EMC Standard Title
CISPR 11:2004/EN
55011:1998+A1:1999&A2:2002, CLASS B
Limits and methods of measurements of radio
disturbance characteristics of industrial, scientific,
and medical (ISM) radio-frequency equipment.
EN 61326:1997+A1:1998+A2:2001+A3:2003
(IEC 61326:2002)
Electrical Equipment for Measurement, Control and
Laboratory Use – Electromagnetic Compatibility.
EN61000-4-2:2001
Electromagnetic Compatibility (EMC) Part 4-2:Testing
and measurement techniques – Electrostatic
discharge immunity test.
EN61000-4-3:2002
Electromagnetic Compatibility (EMC) Part 4-3:
Testing and measurement techniques – Radiated,
radio-frequency, electromagnetic field immunity test.
EN61000-4-4:2004
Electromagnetic Compatibility (EMC) Part 4-4:
Testing and measurement techniques – Electrical
fast transient/burst immunity test.
EN61000-4-5:2001
Electromagnetic Compatibility (EMC) Part 4-5:
Testing and measurement techniques – Surge
immunity test.
EN61000-4-6:2004
Electromagnetic Compatibility (EMC) Part 4-6:
Testing and measurement techniques – Immunity to
conducted disturbances, induced by radio-frequency
fields.
EN61000-4-8:2001
Electromagnetic Compatibility (EMC) Part 4-8:
Testing and measurement techniques – Power
frequency magnetic field immunity test.

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 3
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SITRANS LR250 (FF)
The Manual
This manual will help you set up your SITRANS LR250 for optimum performance. The
manual
Foundation Fieldbus for Level Instruments (7ML19985MP01) provides details on
FF communication. We always welcome suggestions and comments about manual
content, design, and accessibility. Please direct your comments to
[email protected].
For other Siemens Milltronics level measurement manuals, go to:
www.siemens.com/level, and look under Level Measurement.
Application Examples
The application examples used in this manual illustrate typical installations using
SITRANS LR250. (See Appendix E: Application Examples on page 156.) Because there is
often a range of ways to approach an application, other configurations may also apply.
In all examples, substitute your own application details. If the examples do not apply to
your application, check the applicable parameter reference for the available options.
Technical Support
Support is available 24 hours a day.
To find your local Siemens Automation Office address, phone number and fax number go
to:
www.siemens.com/automation/partner
• Click on the tab Contacts by Product then find your product group (+Process
Automation > +Process Instrumentation > +Level Measuring Instruments).
• Select the team Tech ni ca l S up por t . Click on Next.
• Click on the appropriate continent, then select the country followed by the city.
Click on Next.
Notes:
• This product is intended for use in industrial areas. Operation of this equipment in a
residential area may cause interference to several frequency based
communications.
• Please follow the installation and operating procedures for a quick, trouble-free
installation and to ensure the maximum accuracy and reliability of your SITRANS LR250.
• This manual applies to the SITRANS LR250 (FOUNDATION™ Fieldbus)a) only.
a) FOUNDATION™ Fieldbus is a trademark of Fieldbus Foundation.

Page 4 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
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SITRANS LR250 (FF)
For on-line technical support go to:
www.siemens.com/automation/support-request
• Enter the device name (SITRANS LR250) or order number, then click on Search,
and select the appropriate product type. Click on Next.
• You will be prompted to enter a keyword describing your issue. Then either
browse the relevant documentation, or click on Next to E-mail a detailed
description of your issue to Siemens Technical Support staff.
Siemens A&D Technical Support Center: phone [phone]
fax [phone]
Abbreviations and Identifications
Short
form Long Form Description Units
AIFB Analog Input Function Block
CE / FM /
CSA
Conformité Européene / Factory
Mutual / Canadian Standards
Association
safety approval
CiInternal capacitance F
DCS Distributed Control System process control
DD See EDD
DIAG TB Diagnostic Transducer Block
dK dielectric constant
EDD Electronic Device Description (also referred to as DD)
FF Foundation Fieldbus communication protocol
H1 31.25 kbps 2-wire fieldbus
protocol
HSE High Speed Ethernet communication protocol
ITK Interoperability Test Kit
IiInput current mA
IoOutput current mA
IS Intrinsically Safe safety approval
LCD TB Liquid Crystal Display
Transducer Block
chart continued on next page

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 5
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SITRANS LR250 (FF)
LiInternal inductance mH
LTB Level Transducer Block
mH milliHenry 10-3 Henry
µF microFarad 10-6 Farad
µsmicrosecond 10-6 Second
PED Pressure Equipment Directive safety approval
pF pico Farads 10-12 Farad
ppm parts per million
PV Primary Valuea) measured value
RB Resource Block
SELV Safety extra low voltage
SV Secondary Valuea) equivalent value
TVT Time Varying Threshold sensitivity threshold
UiInput voltage V
UoOutput voltage V
a) The output from the Level Transducer Block can be called the Primary Value (or
Secondary Value). When it becomes the input to the AIFB, it is called the
Process Variable.
Short
form Long Form Description Units (cont’d)

Page 6 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
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SITRANS LR250 (FF)
SITRANS LR250 Overview
SITRANS LR250 is a 2-wire 25 GHz pulse radar level transmitter for continuous monitoring
of liquids and slurries in storage vessels including high pressure and high temperature, to
a range of 20 m (66 ft). It is ideal for small vessels and low dielectric media.
The instrument consists of an electronic component coupled to a horn antenna and either
a threaded or flange type process connection.
SITRANS LR250 supports Foundation Fieldbus (FF) communication protocol. Signals are
processed using Process Intelligence which has been field-proven in over 1,000,000
applications worldwide (ultrasonic and radar). This device can be configured as an FF
(H1) Link Master.
Programming
SITRANS LR250 is very easy to install and configure via a graphical local user interface
(LUI). You can modify the built in parameters either locally via the Siemens infrared
handheld programmer, via the 375 Field Communicator, or from a remote location via FF
host system, or AMS Device Manager.
Applications
• liquids and slurries
• bulk storage vessels
• simple process vessels
Approvals and Certificates
SITRANS LR250 is available with General Purpose approval, or for hazardous areas. For
details see
Approvals on page 10.

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 7
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Specifications
Specifications
Power
Bus powered 9-32 V DC, per IEC 61158-2 (Foundation Fieldbus)
Current consumed 20 mA
Performance
Reference operating conditions according to IEC 60770-1
• ambient temperature +15 to +25 oC (+59 to +77 oF)
• humidity 45% to 75% relative humidity
• ambient pressure 860 to 1060 mbar g (86,000 to 106,000 N/m2 g)
Measurement Accuracy (measured in accordance with IEC 60770-1)
• Maximum measured error = 5 mm (0.02") (including hysteresis and non-
repeatability)
Frequency 25 GHz pulse
Max. measurement range1) 2) 20 m (65.6 ft) except for 1.5" (40 mm) horn which has
10 m (32.8 ft) range
Min. detectable distance3) 50 mm (1.97") from end of horn
Update time Minimum 1.5 seconds, depending on settings for
Response Rate and LCD Fast Mode (4.9.).
Influence of ambient temperature <0.003% / K (average over full temperature range,
referenced to maximum range)
Dielectric constant of material measured
• dK > 2.0, horn and application dependent4)
Notes:
• Siemens Milltronics makes every attempt to ensure the accuracy of these
specifications but reserves the right to change them at any time.
General Purpose:
Intrinsically Safe:
Non-Sparking/Energy Limited:
Non-incendive:
9-32 V DC
1) From sensor reference point: see
Threaded Horn Antenna with extension on
page 12 and
Flanged Horn on page 13.
2) Although the maximum measurement range can be set to a value up to
30 m (98.4 ft), performance is only guaranteed to 20 m (65.6 ft).
3) Minimum range is horn length + 50 mm. See
Dimensions on page 11.
4) For 1.5" (40 mm) and 2" (51 mm) horns the dK is limited to 3 unless a stillpipe is
used.

Page 8 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
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Specifications
Memory
• non-volatile EEPROM
• no battery required
Interface
Communication
• Foundation Fieldbus
• ITK version 5 Blocks supported:
RESOURCE, LTB, AIFB1, AIFB2, LCD, DIAG
Block execution time:
AIFB - 40 ms
Configuration
• remote FF host system or Emerson AMS (PC)
• local Siemens Milltronics infrared handheld programmer
[see
Programmer (infrared keypad) on page 11], or
Field Communicator 375 [see
Field Communicator 375
(FC375)
on page 160]
Display (local)1) Graphic LCD, with bar graph (representing level)
Mechanical
Process Connections:
• threaded connection 1.5” NPT (ANSI/ASME B1.20.1), R (BSPT, EN 10226-1) or
G (BSPP, EN ISO 228-1)
or 2" NPT (ANSI/ASME B1.20.1), R (BSPT, EN 10226-1) or
G (BSPP, EN ISO 228-1)
• flange connection (flat faced)
2", 3", 4" (ASME 150 lb, 300 lb)
DN50, DN80, DN100 (PN16, PN40)
50A, 80A, 100A (JIS 10K)
materials 316 L /1.4404 stainless steel
or 316 L /1.4435 stainless steel, optional alloy N06022/
2.4602
• flange connection (raised face)
DN50, DN80, DN100 (PN10/16, PN25/40)
DN150 (PN10/16, PN 25/40)
per EN 1092-1 B1
materials 1.4404 or 1.4435 stainless steel, optional Alloy N06022/
2.4602
Antenna:
• horn standard 1.5" (40 mm), 2" (50 mm), 3" (80 mm), and
4" (100 mm) horn, optional 100 mm (4") horn extension
1) Display quality will be degraded in temperatures below -20 °C (-4 °F) and above
+65 °C (+149 °F).

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 9
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Specifications
materials 316L stainless steel with PTFE emitter
optional Alloy N06022/2.4602 with PTFE emitter
Enclosure
• construction aluminum, polyester powder-coated
• conduit entry 2 x M20x1.5, or 2 x ½" NPT
• conduit entry connector M12 connector (shipped with M20 to M12 adaptor),
(optional) or 7/8" connector (shipped with 1/2" NPT to 7/8" adaptor)
• ingress protection Type 4X/NEMA 4X, Type 6/NEMA 6, IP 67, IP68
(see note below)
Weight (excluding extensions)
• 1.5" threaded connection with 1.5" horn antenna approx. 5.1 kg
(11.2 lb)
• 2" threaded connection with 2" horn antenna approx. 5.5 kg
(12.1 lb)
• DN50/PN16 or 2" 150 lb flat faced flange with 2" horn antenna approx. 8 kg
(17.6 lb)
• DN100/PN40 or 4" ASME 300 lb flat faced flange with 4" horn antenna approx. 17.4 kg
(38.3 lb)
• DN50/PN16 raised face flange with 2" horn antenna approx. 6 kg
(13.2 lb)
• DN100/PN40 raised face flange with 4" horn antenna approx.
11.3 kg (24.9 lb)
Environmental
• location indoor/ outdoor
• altitude 5000 m (16,404 ft) max.
• ambient temperature −40 to +80 °C (−40 to +176 °F)
• relative humidity suitable for outdoor
Type 4X/NEMA 4X, Type 6/NEMA 6, IP67, IP68 enclosure
(see note above)
• installation category I
• pollution degree 4
Notes:
• Check Approvals on page 10, for the specific configuration you are about to use or
install.
• Use appropriate conduit seals to maintain IP or NEMA rating.

Page 10 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
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Specifications
Process
•temperature
1)
at process connection
- with FKM O-ring −40 to +200 °C (−40 to +392 °F)
- with FFKM O-ring −20 to +200 °C (−4 to +392 °F)
• pressure (vessel)1Refer to
Process Pressure/Temperature derating curves
on page 152.
Approvals
•General CSA
US/C, CE, FM, NE 21, C-TICK
• Radio FCC, Industry Canada and Europe ETSI EN 302-372, C-TICK
• Hazardous Intrinsically Safe2)(Europe) ATEX II 1G, Ex ia IIC T4
ATEX II 1D, Ex tD A20 IP67 T90 °C
Non-sparking/ (Europe) ATEX II 3G, Ex nA/nL IIC T4 Gc
Energy Limited3)
Intrinsically Safe (Canada/USA) CSA/FM Class I, Div. 1, Groups A, B, C, D;
Class II, Div. 1, Groups E, F, G; Class III T4
Non-incendive4) (Canada/USA) CSA/FM Class I, Div. 2, Groups A, B, C, D
T5
Intrinsically Safe (International) IECEx Ex ia IIC T4, Ex tD A20 IP67 T90 °C
Flame Proof (International IECEx/ATEX II 1/2 GD, 1D, 2D, Ex dmbia IIC
/Europe) T4 Ga/Gb, Ex tD A20 IP67 T90 °C
Increased Safety (International IECEx/ATEX II 1/2 GD, 1D, 2D, Ex embia IIC
/Europe) T4 Ga/Gb, Ex tD A20 IP67 T90 °C
Explosion Proof (Canada/USA) CSA/FMClass I, Div. 1, Groups A, B, C, D;
Class II, Div. 1, Groups E, F, G; Class III T4
• Marine Lloyd’s Register of Shipping
ABS Type Approval
Bureau Veritas
1) The specifications apply to the standard configuration only (with FKM O-ring).
Maximum and minimum temperatures are dependent on the process connec-
tion, antenna and O-ring materials, and vessel pressure. For more detail, or for
other configurations, see
Maximum Process Temperature Chart on page 151,
and
Process Pressure/Temperature derating curves on page 152.
Note: The device nameplate lists the approvals that apply to your device.
2) See
Intrinsically Safe wiring on page 26
3) See
Non-Sparking-Energy Limited wiring on page 28.
4) See
Non-incendive wiring (only for USA/Canada) on page 28.

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 11
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Specifications
Programmer (infrared keypad)
Siemens Milltronics Infrared IS (Intrinsically Safe) Hand Programmer for hazardous and
all other locations (battery is non-replaceable)
• approval CSA/FM Class I, II, III, Div. 1, Groups A, B, C, D, E, F, G T6
CE
ATEX II 1GD, Ex ia IIC T4 Ga,
Ex iaD 20 T135 °C
IECEx SIR 09.0073X, Ex ia IIC T4 Ga,
Ex iaD 20 T135 °C
INMETRO Br-Ex ia IIC T4
• ambient temperature −20 to +50 °C (−5 to +122 °F)
• interface proprietary infrared pulse signal
• power 3 V lithium battery
• weight 150 g (0.3 lb)
• color black
• part number 7ML1930-1BK
Dimensions
Threaded Horn dimensions
Threaded Connection Markings
Threaded connection markings are found on the flat face/faces of the process
connection.
Serial number: a unique number allotted to each flange, including the date of
manufacture (MMDDYY) followed by a number from 001 to 999.
Notes:
• Battery is non-replaceable with a lifetime expectancy of 10 years in normal use.
• To estimate the lifetime expectancy, check the nameplate on the back for the serial
number. The first six numbers show the production date (mmddyy), for example,
device with serial number 032608101V was produced on March 26, 2008.
Nominal Horn Size Horn O.D. Horn Height to sensor
reference pointa)
a) Height from bottom of horn to sensor reference point as shown: see
Threaded
Horn Antenna with extension
on page 12.
Beam Angleb)
b) – 3 dB in the direction of the polarization axis (see
Polarization reference point
on page 20 for an illustration).
Measurement
Range
40 mm (1.5") 39.8 mm (1.57”) A135 mm (5.3") 19 degrees 10 m (32.8 ft)
50 mm (2”) 47.8 mm (1.88”) B166 mm (6.55”) 15 degrees
20 m (65.6 ft)80 mm (3”) 74.8 mm (2.94”) C199 mm (7.85”) 10 degrees
100 mm (4”) 94.8 mm (3.73”) D254 mm (10”) 8 degrees

Page 12 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
mmmmm
Specifications
Threaded Horn Antenna with extension
See table under Dimensions on page 11 for horn height to sensor reference point (A, B, C,
or D).
Notes:
• Process temperature and pressure capabilities are dependent upon information on
the process device tag. Reference drawing listed on the Tag is available on the
product page of our website at www.siemens.com/LR250, under More Info /
Installation drawings. Additional information on process connections is available
on the Installation Drawings page under Process Connection Diagrams.
• Signal amplitude increases with horn diameter, so use the largest practical size.
• Optional extensions can be installed between the flange and the antenna.
threaded cover
enclosure/
electronics
196 mm
(7.7")
154 mm
(6.1")
167 mm
(6.6")
1/2" NPT cable entry
(or alternatively, M20 cable gland)
sensor
ref.
point
retaining
collar
90 mm
(3.5")
159 mm
(6.26")
50 mm
(2.0")
horn
28 mm (1.1"") optional
100 mm (4.0 ")
horn extension
process device tag
horn
O.D.
A
B
C
D

7ML19985KL01 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS Page 13
mmmmm
Specifications
Flanged Horn
Notes:
• Process temperature and pressure capabilities are dependent upon information on
the process device tag. Reference drawing listed on the Tag is available on the
product page of our website at www.siemens.com/LR250, under More Info /
Installation drawings. Additional information on process connections is available
on the Installation Drawings page under Process Connection Diagrams.
• Signal amplitude increases with horn diameter, so use the largest practical size.
• Optional extensions can be installed between the flange and the antenna.
enclosure/electronics
name-plate
flange
horn
sensor
reference
point
retaining collar
process
device
tag
227 mm
(8.94")
horn
O.D.
135.5 mm
(5.33")
154 mm
(6.1")
50 mm
(2.0")
threaded cover
1/2" NPT cable entry
(or alternatively, M20 cable gland)
168.5 mm
(6.63")
223.5mm
(8.8")
50 mm (2")
nom.
80 mm (3")
nom.
100 mm (4")
nom.
167 mm
(6.6")
90 mm
(3.5")
190 mm
(7.48")
optional
100 mm (4.0 ")
horn extension

Page 14 SITRANS LR250 (FF) – OPERATING INSTRUCTIONS 7ML19985KL01
mmmmm
Specifications
Flanged Horn dimensions
For flange dimensions see Raised Face Flange per EN 1092-1 on page 14 or Flat Faced
Flange on page 16.
Raised Face Flange per EN 1092-1
Nominal Horn Size Horn O.D. Height to sensor
reference pointa)
a) Height from bottom of horn to sensor reference point as shown: see
Flanged
Horn
on page 13.
Beam Angleb)
b) – 3 dB in the direction of the polarization axis (see
Polarization reference point
on page 20 for an illustration).
Measurement
Range
50 mm (2”) 47.8 mm (1.88”) 135.5 mm (5.33”) 15 degrees
20 m (65.6 ft)80 mm (3”) 74.8 mm (2.94”) 168.5 mm (6.63”) 10 degrees
100 mm (4”) 94.8 mm (3.73”) 223.5 mm (8.8”) 8 degrees
process side
waveguide
mounting hole
angle of adjacent bolt holes
flange O.D.
bolt hole circle
bolt hole circle dia.
thickness
facing
height
= 3 mm
facing dia.
bolt hole