Siemens SITRANS L User manual

SITRANS LR250 with FOUNDATION FIELDBUS
SITRANS L
Radar Transmitters
SITRANS LR250 with FOUNDATION
FIELDBUS
Operating Instructions
7ML5431 (LR250)
7ML5432 (LR250 flanged encapsulated antenna)
7ML5433 (LR250 hygienic encapsulated antenna)
09/2021
A5E32221411
-AH
Introduction
1
Safety information
2
Description
3
Installing/mounting
4
Connecting
5
Commissioning
6
Remote operation
7
Parameter reference
8
Service and maintenance
9
Diagnosing and
troubleshooting
10
Technical specifications
11
Dimension drawings
12
Appendix A: Technical
reference
A
Appendix B:
Communications via
Foundation Fieldbus
B
Appendix C: Product
documentation and
support
C
List of abbreviations
13
LCD menu structure
14

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E32221411
Ⓟ
03/2022 Subject to change
Copyright © Siemens AG 2021.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH 3
Table of contents
1 Introduction ........................................................................................................................................... 9
1.1 LR250 FF manual usage ....................................................................................................... 9
1.2 Purpose of this documentation ............................................................................................ 9
1.3 Revision history ................................................................................................................... 9
1.4 Industrial use note............................................................................................................. 10
1.5 Checking the consignment................................................................................................. 10
1.6 Security information .......................................................................................................... 10
1.7 Transportation and storage................................................................................................ 11
1.8 Notes on warranty ............................................................................................................. 11
2 Safety information............................................................................................................................... 12
2.1 Preconditions for safe use .................................................................................................. 12
2.1.1 Safety marking symbols ..................................................................................................... 12
2.1.2 Laws and directives............................................................................................................ 12
2.1.3 FCC Conformity ................................................................................................................. 13
2.1.4 Industry Canada conformity ............................................................................................... 13
2.1.5 Industry Canada conformity note ....................................................................................... 14
2.1.6 Conformity with European directives.................................................................................. 14
2.1.7 Conformity with UK regulations ......................................................................................... 15
2.1.8 Radio Equipment - EU Directive (RED) 2014/53/EU and UK regulation SI 2017/1206 ............ 15
2.1.9 CE and UKCA Electromagnetic Compatibility (EMC) Conformity .......................................... 15
2.2 Improper device modifications ........................................................................................... 16
2.3 Requirements for special applications................................................................................. 16
2.4 Use in hazardous areas ...................................................................................................... 17
3 Description........................................................................................................................................... 18
3.1 SITRANS LR250 overview ................................................................................................... 18
3.2 Programming..................................................................................................................... 19
3.3 Applications....................................................................................................................... 19
3.4 Approvals and certificates .................................................................................................. 20
4 Installing/mounting ............................................................................................................................. 21
4.1 Basic safety information..................................................................................................... 21
4.1.1 Unsuitable cables, cable glands and/or plugs ...................................................................... 22
4.1.2 Pressure applications ......................................................................................................... 22
4.1.2.1 Pressure Equipment Directive, PED, 2014/68/EU ................................................................. 23
4.2 Installation location requirements...................................................................................... 24
4.3 Proper mounting ............................................................................................................... 25

Table of contents
SITRANS LR250 with FOUNDATION FIELDBUS
4Operating Instructions, 09/2021, A5E32221411-AH
4.3.1 Nozzle design .................................................................................................................... 26
4.3.2 Nozzle location .................................................................................................................. 27
4.3.3 Orientation in a vessel with obstructions............................................................................ 29
4.3.4 Mounting on a Stillpipe or Bypass Pipe ............................................................................... 29
4.3.5 Device orientation ............................................................................................................. 30
4.4 Installation instructions...................................................................................................... 30
4.4.1 Threaded versions ............................................................................................................. 32
4.4.2 Flanged versions................................................................................................................ 32
4.4.3 Hygienic versions............................................................................................................... 34
4.5 Disassembly....................................................................................................................... 35
5 Connecting .......................................................................................................................................... 36
5.1 Basic safety information..................................................................................................... 36
5.2 Connecting SITRANS LR250................................................................................................ 36
5.3 Wiring setups for hazardous area installation...................................................................... 39
5.3.1 Configuration with Foundation Fieldbus for hazardous areas.............................................. 40
5.3.2 Intrinsically safe wiring ...................................................................................................... 41
5.3.2.1 Intrinsically safe wiring (FM/CSA) ....................................................................................... 42
5.3.2.2 FISCO concept ................................................................................................................... 42
5.3.3 Non-sparking wiring .......................................................................................................... 43
5.3.4 Non-incendive wiring (US/Canada only) ............................................................................. 44
5.4 Instructions specific to hazardous area installations............................................................ 44
5.4.1 (Reference European ATEX Directive 2014/34/EU, Annex II, 1.0.6 and UK Regulation SI
2016/1107) ....................................................................................................................... 44
6 Commissioning .................................................................................................................................... 46
6.1 Basic safety information..................................................................................................... 46
6.2 Operating via the handheld programmer ........................................................................... 46
6.2.1 Power up ........................................................................................................................... 47
6.2.2 Handheld programmer functions ....................................................................................... 47
6.2.2.1 The LCD display ................................................................................................................. 48
6.2.2.2 Handheld programmer (Part No. 7ML1930-1BK) ................................................................ 49
6.2.3 Programming .................................................................................................................... 50
6.2.3.1 Programming the radar device ........................................................................................... 50
6.2.3.2 Quick Start Wizard via the handheld programmer_note ...................................................... 54
6.2.3.3 Auto False Echo Suppression.............................................................................................. 57
6.2.3.4 Requesting an Echo Profile................................................................................................. 57
6.2.3.5 Device Address .................................................................................................................. 58
6.3 Application examples......................................................................................................... 58
6.3.1 Liquid resin in storage vessel, level measurement............................................................... 59
6.3.2 Horizontal vessel with volume measurement ..................................................................... 60
6.3.3 Application with stillpipe.................................................................................................... 62
7 Remote operation................................................................................................................................ 65
7.1 Operating via AMS Device Manager.................................................................................... 65
7.1.1 Functions in AMS Device Manager ..................................................................................... 65
7.1.2 Key features of AMS Device Manager Rev. 9.0 .................................................................... 66
7.1.2.1 Pull-down menu access...................................................................................................... 67
7.1.3 Adding a new device.......................................................................................................... 68

Table of contents
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH 5
7.1.3.1 Electronic Device Description (EDD) ................................................................................... 68
7.1.4 Master Reset...................................................................................................................... 70
7.1.5 Scan Device ....................................................................................................................... 70
7.1.6 Sensor calibration .............................................................................................................. 70
7.1.7 Configuring a new device................................................................................................... 71
7.1.7.1 Quick Start Wizard via AMS Device Manager ....................................................................... 71
7.1.8 Changing parameter settings using AMS Device Manager................................................... 74
7.1.9 Configure/Setup (Level Transducer Block-LTB) .................................................................... 74
7.1.9.1 Identification (LTB) ............................................................................................................ 74
7.1.9.2 Operation (LTB) ................................................................................................................. 75
7.1.9.3 Setup (LTB)........................................................................................................................ 77
7.1.9.4 Linearization (LTB) ............................................................................................................. 79
7.1.9.5 Signal processing............................................................................................................... 80
7.1.9.6 Maintenance & Diagnostics (LTB) ....................................................................................... 85
7.1.9.7 Communication (LTB) ........................................................................................................ 87
7.1.10 Configure/Setup (Liquid Crystal Display Block-LCD) ............................................................. 88
7.1.10.1 Identification (LCD)............................................................................................................ 88
7.1.10.2 Operation (LCD)................................................................................................................. 89
7.1.10.3 Setup (LCD) ....................................................................................................................... 89
7.1.10.4 Communication (LCD)........................................................................................................ 90
7.1.11 Configure/Setup (Diagnostic Transducer Block-DIAG).......................................................... 90
7.1.11.1 Identification (DIAG) .......................................................................................................... 90
7.1.11.2 Operation (DIAG)............................................................................................................... 91
7.1.11.3 Communication (DIAG)...................................................................................................... 91
7.1.12 Configure/Setup (Resource Block - RESOURCE).................................................................... 91
7.1.12.1 Identification (RESOURCE).................................................................................................. 92
7.1.12.2 Wizards (RESOURCE) .......................................................................................................... 93
7.1.12.3 Operation (RESOURCE)....................................................................................................... 93
7.1.12.4 Maintenance & Diagnostics (RESOURCE) ............................................................................ 95
7.1.12.5 Communication (RESOURCE).............................................................................................. 96
7.1.12.6 Security (RESOURCE).......................................................................................................... 97
7.1.13 Device Diagnostics (Level Transducer Block - LTB)............................................................... 98
7.1.13.1 Alarms & Errors (LTB) ......................................................................................................... 98
7.1.13.2 Extended Diagnostics (LTB).............................................................................................. 101
7.1.14 Device Diagnostics (Liquid Crystal Display Block - LCD)...................................................... 102
7.1.14.1 Alarms & Errors (LCD) ...................................................................................................... 102
7.1.15 Device Diagnostics (Diagnostic Transducer Block - DIAG) .................................................. 102
7.1.15.1 Alarms & Errors (DIAG)..................................................................................................... 102
7.1.16 Device Diagnostics (Resource Block - RESOURCE) .............................................................. 102
7.1.16.1 Alarms & Errors (RESOURCE) ............................................................................................ 102
7.1.16.2 Extended Diagnostics (RESOURCE) ................................................................................... 104
7.1.17 Process Variables (Level Transducer Block - LTB) ............................................................... 105
7.1.18 Password Protection......................................................................................................... 106
7.1.18.1 User Manager utility......................................................................................................... 106
7.1.19 AMS menu structure ........................................................................................................ 108
8 Parameter reference.......................................................................................................................... 120
8.1 Alphabetical parameter list............................................................................................... 160
9 Service and maintenance .................................................................................................................. 165
9.1 Basic safety information................................................................................................... 165
9.2 Cleaning.......................................................................................................................... 165

Table of contents
SITRANS LR250 with FOUNDATION FIELDBUS
6Operating Instructions, 09/2021, A5E32221411-AH
9.3 Maintenance and repair work........................................................................................... 166
9.3.1 Unit repair and excluded liability ...................................................................................... 167
9.3.2 Part replacement ............................................................................................................. 167
9.4 Disposal........................................................................................................................... 169
9.5 Return procedure............................................................................................................. 169
10 Diagnosing and troubleshooting....................................................................................................... 170
10.1 Device status icons .......................................................................................................... 171
10.2 General fault codes.......................................................................................................... 172
10.3 Operation troubleshooting............................................................................................... 176
11 Technical specifications..................................................................................................................... 178
11.1 Power.............................................................................................................................. 178
11.2 Performance.................................................................................................................... 178
11.3 Interface.......................................................................................................................... 179
11.4 Mechanical...................................................................................................................... 180
11.5 Environmental................................................................................................................. 182
11.6 Process ............................................................................................................................ 182
11.7 Approvals ........................................................................................................................ 183
11.8 Programmer (infrared keypad) ......................................................................................... 183
12 Dimension drawings.......................................................................................................................... 185
12.1 Universal polymeric flange............................................................................................... 185
12.2 Aluminum horn antenna.................................................................................................. 187
12.3 Mounting bracket ............................................................................................................ 188
12.4 Aluminum horn with polypropylene lens antenna and polymeric flange ........................... 190
12.5 Stainless steel threaded horn antenna.............................................................................. 191
12.6Stainless steel threaded horn antenna with extension ...................................................... 194
12.7 Stainless steel flanged horn antenna................................................................................ 196
12.8 Stainless steel flanged horn antenna with extension ........................................................ 198
12.9 PTFE Flanged encapsulated antenna (2"/DN50/50A sizes only).......................................... 200
12.10 PTFE Flanged encapsulated antenna (3"/DN80/80A sizes and larger)................................. 202
12.11 Hygienic encapsulated antenna (2" ISO 2852 sanitary clamp) ........................................... 204
12.12 Hygienic encapsulated antenna (3" ISO 2852 sanitary clamp) ........................................... 205
12.13 Hygienic encapsulated antenna (4" ISO 2852 sanitary clamp) ........................................... 206
12.14 Hygienic encapsulated antenna (DN50 nozzle/ slotted nut to DIN 11851) ......................... 207
12.15 Hygienic encapsulated antenna (DN80 nozzle/ slotted nut to DIN 11851) ......................... 208
12.16 Hygienic encapsulated antenna (DN100 nozzle/ slotted nut to DIN 11851) ....................... 209
12.17 Hygienic encapsulated antenna (DN50 aseptic slotted nut to DIN 11864-1) ...................... 210

Table of contents
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH 7
12.18 Hygienic encapsulated antenna (DN80 aseptic slotted nut to DIN 11864-1) ...................... 211
12.19 Hygienic encapsulated antenna (DN100 aseptic slotted nut to DIN 11864-1) .................... 212
12.20 Hygienic encapsulated antenna (DN50 aseptic flange to DIN 11864-2) ............................. 213
12.21 Hygienic encapsulated antenna (DN80 aseptic flange to DIN 11864-2) ............................. 214
12.22 Hygienic encapsulated antenna (DN100 aseptic flange to DIN 11864-2) ........................... 215
12.23 Hygienic encapsulated antenna (DN50 aseptic clamp to DIN 11864-3) ............................. 216
12.24 Hygienic encapsulated antenna (DN80 aseptic clamp to DIN 11864-3) ............................. 217
12.25 Hygienic encapsulated antenna (DN100 aseptic clamp to DIN 11864-3) ........................... 218
12.26 Hygienic encapsulated antenna (Tuchenhagen Type N).................................................... 219
12.27 Hygienic encapsulated antenna (Tuchenhagen Type F)..................................................... 220
12.28 Threaded PVDF antenna................................................................................................... 221
12.29 Threaded connection markings ........................................................................................ 222
12.30 Raised-Face flange ........................................................................................................... 223
12.31 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna................................ 225
12.32 Flat-Face flange ............................................................................................................... 227
12.33 Aseptic/hygienic flange DN50, DN80, DN100 for DIN 11864-2.......................................... 229
12.34 Process connection tag (pressure rated versions).............................................................. 231
A Appendix A: Technical reference....................................................................................................... 233
A.1 Principles of operation ..................................................................................................... 233
A.2 Echo processing............................................................................................................... 233
A.2.1 Process Intelligence ......................................................................................................... 233
A.2.2 Echo Selection ................................................................................................................. 234
A.2.3 CLEF Range...................................................................................................................... 237
A.2.4 Measurement Response................................................................................................... 237
A.2.5 Echo Threshold ................................................................................................................ 238
A.2.6 Echo Lock ........................................................................................................................ 238
A.2.7 Auto False Echo Suppression............................................................................................ 238
A.2.8 Measurement Range........................................................................................................ 240
A.2.9 Damping ......................................................................................................................... 240
A.2.10 Loss of Echo (LOE) ........................................................................................................... 240
A.2.10.1 LOE Timer........................................................................................................................ 241
A.3 Maximum Process Temperature Chart .............................................................................. 241
A.4 Process Pressure/Temperature derating curves ................................................................. 242
A.4.1 Pressure Equipment Directive, PED, 2014/68/EU ............................................................... 243
A.4.2 Stainless steel horn antenna ............................................................................................ 244
A.4.3 Stainless steel flanged horn antenna ................................................................................ 245
A.4.4 PTFE flanged encapsulated antenna ................................................................................. 248
A.4.5 Aluminum horn, with polypropylene lens antenna version with polypropylene flange 3
inch/80 mm size only ....................................................................................................... 249
A.4.6 PVDF antenna .................................................................................................................. 250
A.4.7 Hygienic encapsulated antenna........................................................................................ 250

Table of contents
SITRANS LR250 with FOUNDATION FIELDBUS
8Operating Instructions, 09/2021, A5E32221411-AH
B Appendix B: Communications via Foundation Fieldbus.................................................................... 253
B.1 Field Communicator 375 (F375) ...................................................................................... 253
C Appendix C: Product documentation and support ............................................................................ 254
C.1 Product documentation ................................................................................................... 254
C.2 Technical support ............................................................................................................ 255
13 List of abbreviations .......................................................................................................................... 256
14 LCD menu structure ........................................................................................................................... 257
Glossary ............................................................................................................................................. 261
Index.................................................................................................................................................. 266

SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH 9
Introduction
1
1.1 LR250 FF manual usage
Note
This manual applies to the SITRANS LR250 (FOUNDATION™ Fieldbus) only. FOUNDATION™
Fieldbus is a trademark of Fieldbus Foundation.
Follow these operating instructions for quick, trouble-free installation, and maximum
accuracy and reliability of your device.
We always welcome suggestions and comments about manual content, design, and
accessibility. Please direct your comments to:
Technical publications (pi-documentation-service.indus[email protected])
1.2 Purpose of this documentation
These instructions contain all information required to commission and use the device. Read
the instructions carefully prior to installation and commissioning. In order to use the device
correctly, first review its principle of operation.
The instructions are aimed at persons mechanically installing the device, connecting it
electronically, configuring the parameters and commissioning it, as well as service and
maintenance engineers.
1.3 Revision history
This history establishes the correlation between the current documentation and the valid
firmware of the device.
The documentation of this edition is applicable for the following firmware:
Edition Firm-
ware
rev.
PDM
EDD rev.
Date Changes
1.0
1.01.00
1.01.00
25 Feb 2010
•Initial release
2.0
1.01.04
1.01.00
2 Aug 2011
•
Threaded PVDF antenna supported
01/2012
1.01.05
1.01.00
31 Oct 2012
•Antenna parameter removed
•Quickstart on local display enhancements

Introduction
1.4 Industrial use note
SITRANS LR250 with FOUNDATION FIELDBUS
10 Operating Instructions, 09/2021, A5E32221411-AH
Edition Firm-
ware
rev.
PDM
EDD rev.
Date Changes
08/2014
N/A
N/A
Jan 2014
•Flanged encapsulated antenna version
added
08/2014
N/A
N/A
Aug 2014
•Hygienic encapsulated antenna version
added
12/2015
N/A
N/A
Dec 2015
•
Manual maintenance
1.4 Industrial use note
NOTICE
Use in a domestic environment
This Class B Group 1 equipment is intended for use in industrial areas.
In a domestic environment this device may cause radio interference.
1.5 Checking the consignment
1. Check the packaging and the delivered items for visible damages.
2. Report any claims for damages immediately to the shipping company.
3. Retain damaged parts for clarification.
4. Check the scope of delivery by comparing your order to the shipping documents for
correctness and completeness.
WARNING
Using a damaged or incomplete device
Risk of explosion in hazardous areas.
•
Do not use damaged or incomplete devices.
1.6 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.

Introduction
1.7 Transportation and storage
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH 11
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the internet if and to the extent such a connection is necessary
and only when appropriate security measures (e.g. firewalls and/or network segmentation)
are in place.
For additional information on industrial security measures that may be implemented, please
visit
https://www.siemens.com/industrialsecurity (https://www.siemens.com/industrialsecurity).
Siemens’ products and solutions undergo continuous development to make them more
secure. Siemens strongly recommends that product updates are applied as soon as they are
available and that the latest product versions are used. Use of product versions that are no
longer supported, and failure to apply the latest updates may increase customer’s exposure to
cyber threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
https://www.siemens.com/cert (https://www.siemens.com/industrialsecurity).
1.7 Transportation and storage
To guarantee sufficient protection during transport and storage, observe the following:
•Keep the original packaging for subsequent transportation.
•Devices/replacement parts should be returned in their original packaging.
•If the original packaging is no longer available, ensure that all shipments are properly
packaged to provide sufficient protection during transport. Siemens cannot assume
liability for any costs associated with transportation damages.
CAUTION
Insufficient protection during storage
The packaging only provides limited protection against moisture and infiltration.
•
Provide additional packaging as necessary.
1.8 Notes on warranty
The contents of this manual shall not become part of or modify any prior or existing
agreement, commitment or legal relationship. The sales contract contains all obligations on
the part of Siemens as well as the complete and solely applicable warranty conditions. Any
statements regarding device versions described in the manual do not create new warranties
or modify the existing warranty.
The content reflects the technical status at the time of publishing. Siemens reserves the right
to make technical changes in the course of further development.

SITRANS LR250 with FOUNDATION FIELDBUS
12 Operating Instructions, 09/2021, A5E32221411-AH
Safety information
2
2.1 Preconditions for safe use
This device left the factory in good working condition. In order to maintain this status and to
ensure safe operation of the device, observe these instructions and all the specifications
relevant to safety.
Observe the information and symbols on the device. Do not remove any information or
symbols from the device. Always keep the information and symbols in a completely legible
state.
2.1.1 Safety marking symbols
In manual
On product
Description
(Label on product:
yellow back-
ground.)
WARNING: refer to accompanying documents (manual) for
details.
2.1.2 Laws and directives
Observe the safety rules, provisions, and laws applicable in your country during connection,
assembly, and operation. These include, for example:
•National Electrical Code (NEC - NFPA 70) (USA)
•Canadian Electrical Code (CEC Part I) (Canada)
Further provisions for hazardous area applications are for example:
•IEC 60079-14 (International)
•EN 60079-14 (EU and UK)

Safety information
2.1 Preconditions for safe use
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH 13
2.1.3 FCC Conformity
US Installations only: Federal Communications Commission (FCC) rules
Note
•
This device has been tested and found to comply with the limits Class B digital device 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 device has also been tested and found to comply with the limits §15.256, Subpart C-
Intentional radiators, 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 device 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, in which case the user will be required to correct the interference
at his/her own expense.
•
This device is certified to measure levels in fixed or mobile enclosed tanks made from
metal, concrete or materials with similar RF attenuating properties.
•
Devices equipped with the aluminum horn or the 3 inch or 4 inch stainless horn antennas
may be used to measure levels in open air environments or outside enclosed tanks,
subject to the following conditions:
–Devices shall be installed and maintained to ensure a vertically downward orientation
of the transmit antenna’s main beam.
–Devices shall be installed only at fixed locations. Devices shall not operate while being
moved or while inside a moving container.
–Hand-held applications and residential use are prohibited.
2.1.4 Industry Canada conformity
Canada Installations only: Industry Canada (IC) rules
NOTICE
Use on a "no-interference, no-protection" basis
The installation of the LPR/TLPR device shall be done by trained installers, in strict
compliance with the manufacturer's instructions.
•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. However, devices found to interfere with primary
licensing operations will be required to be removed at the user's expense.

Safety information
2.1 Preconditions for safe use
SITRANS LR250 with FOUNDATION FIELDBUS
14 Operating Instructions, 09/2021, A5E32221411-AH
2.1.5 Industry Canada conformity note
Note
•
This device has been tested and found to comply with the limits RS- 211 - Level Probing
Radar Equipment. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment.
•
This device is certified to measure levels in fixed or mobile enclosed tanks made from
metal, concrete or materials with similar RF attenuating properties.
•
Devices equipped with the aluminum horn or the 3 inch or 4 inch stainless horn antennas
may be used to measure levels in open air environments or outside enclosed tanks,
subject to the following conditions:
–Devices shall be installed and maintained to ensure a vertically downward orientation
of the transmit antenna’s main beam.
–Devices shall be installed only at fixed locations. Devices shall not operate while being
moved or while inside a moving container.
–Hand-held applications and residential use are prohibited.
2.1.6 Conformity with European directives
The CE marking on the device symbolizes the conformity with the following European
directives:
Electromagnetic compatibility EMC
2014/30/EU
Directive of the European Parliament and of the Council
on the
harmonisation of the laws of the Member States
relating to electromagnetic compatibility
Low voltage directive LVD
2014/35/EU
Directive of the European Parliament and of the Council
on the harmonisation of the laws of the Member States
relating to the making available on the market of electrical
equipment designed for use within certain voltage limits
Atmosphère explosible ATEX
2014/34/EU
Directive of the European Parliament and the Council on
the harmonisation of the laws of the Member States relat-
ing
to equipment and protective systems intended for use
in potentially explosive atmospheres
Pressure equipment directive PED
2014/68/EU
Directive of the European Parliament and of the Council
on the harmonisation of the laws of the Member States
relating to the making available on the market of pressure
equipment
Radio equipment directive RED
2014/53/EU
Directive of the European Parliament and of the Council
on the harmonisation of the laws of the Member States
relating to the making available on
the market of radio
equipment and repealing Directive 1999/5/EC
The applicable directives can be found in the EC conformity declaration of the specific device.

Safety information
2.1 Preconditions for safe use
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2.1.7 Conformity with UK regulations
The UKCA marking on the device symbolizes the conformity with the following UK
regulations:
Electromagnetic compatibility
EMC SI 2016/1091
Electromagnetic Compatibility Regulations
2016
Low Voltage LVD SI 2016/1101
Electrical Equipment (Safety) Regulations
2016
Explosive atmosphere UKEX SI 2016/1107
Equipment and Protective Systems Intended
for use in Potentially Explosive Atmospheres
Regulations 2016
Pressure equipment SI 2016/1105
Pressure Equipment (Safety) Regulations 2016
Radio equipment SI 2017/1206
Radio Equipment Regulations 2017
RoHS SI 2012/3032
The Restriction of the Use of Certain Hazard-
ous Substances in Electrical and Electronic
Equipment Regulations 2012
The applicable regulations can be found in the UKCA declaration of conformity of the specific
device.
2.1.8 Radio Equipment - EU Directive (RED) 2014/53/EU and UK regulation SI
2017/1206
For the receiver test that covers the influence of an interferer signal to the device, the
performance criterion has at least the following level of performance according to ETSI TS
103 361 [6]:
•Performance criterion: measurement value variation Δd over time during a distance
measurement
•Level of performance: Δd ≤ ±50 mm
2.1.9 CE and UKCA Electromagnetic Compatibility (EMC) Conformity
This equipment has been tested and found to comply with the following EMC Standards:
EMC Standard
Title
CISPR 11:2009 + A1:2010/EN
55011:2009 + A1:2010, Class B
Limits and methods of measurements of radio dis-
turbance characteristics of industrial, scientific, and
medical (ISM) radio-frequency equipment.
EN 61326:2013
(IEC 61326:2012)
Electrical Equipment for Measurement, Control and
Laboratory Use – Electromagnetic Compatibility.
EN61000-4-2:2009
Electromagnetic Compatibility (EMC) Part 4-2: Testing
and measurement techniques – Electrostatic dis-
charge immunity test.
EN61000-4-3:2006 + A1:2008 + A2:2010
Electromagnetic Compatibility (EMC) Part 4-3: Testing
and measurement techniques – Radiated, radio-
frequency, electromagnetic field immunity test 2006
+ A1:2008 + A2:2010.

Safety information
2.2 Improper device modifications
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EMC Standard
Title
EN61000-4-4:2004 + A1:2010
Electromagnetic Compatibility (EMC) Part 4-4: Testing
and measurement techniques – Electrical fast transi-
ent/burst immunity test.
EN61000-4-5:2006
Electromagnetic Compatibility (EMC) Part 4-5: Testing
and measurement techniques – Surge immunity test.
EN61000-4-6:2010
Electromagnetic Compatibility (EMC) Part 4-6: Testing
and measurement techniques – Immunity to conduct-
ed disturbances, induced by radio-frequency fields.
EN61000-4-8:2010
Electromagnetic Compatibility (EMC) Part 4-8: Testing
and measurement techniques – Power frequency
magnetic field immunity test.
2.2 Improper device modifications
WARNING
Improper device modifications
Risk to personnel, system and environment can result from modifications to the device,
particularly in hazardous areas.
•Only carry out modifications that are described in the instructions for the device. Failure
to observe this requirement cancels the manufacturer's warranty and the product
approvals.
2.3 Requirements for special applications
Due to the large number of possible applications, each detail of the described device versions
for each possible scenario during commissioning, operation, maintenance or operation in
systems cannot be considered in the instructions. If you need additional information not
covered by these instructions, contact your local Siemens office or company representative.
Note
Operation under special ambient conditions
We highly recommend that you contact your Siemens representative or our application
department b
efore you operate the device under special ambient conditions as can be
encountered in nuclear power plants or when the device is used for research and
development purposes.

Safety information
2.4 Use in hazardous areas
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Operating Instructions, 09/2021, A5E32221411-AH 17
2.4 Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous
area must have the following specific qualifications:
•They are authorized, trained or instructed in operating and maintaining devices and
systems according to the safety regulations for electrical circuits, high pressures,
aggressive, and hazardous media.
•They are authorized, trained, or instructed in carrying out work on electrical circuits for
hazardous systems.
•They are trained or instructed in maintenance and use of appropriate safety equipment
according to the pertinent safety regulations.
WARNING
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device has already been operated in non-intrinsically safe circuits or the electrical
specifications have not been observed, the safety of the device is no longer ensured for use
in hazardous areas. There is a danger of explosion.
•Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe
circuit.
•
Observe the specifications for the electrical data on the certificate.

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Description
3
3.1 SITRANS LR250 overview
WARNING
Loss of protection
Danger to personnel, system and environment can result from improper use of the device.
•SITRANS LR250 is to be used only in the manner outlined in this manual, otherwise
protection provided by the device may be impaired.
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 meters (66 feet). It is ideal for small vessels, material such as chemicals, food,
beverages, solvents (including those of corrosive or aggressive nature), and low dielectric
media.
The device consists of an electronic circuit coupled to a permanently attached antenna and
either a threaded or flange type process connection.
This device 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.

Description
3.2 Programming
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3.2 Programming
This device 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, or from a remote location using one of the following options:
•FF host system
•AMS Device Manager
3.3 Applications
•liquids and slurries
•bulk storage vessels
•simple process vessels
•corrosive and aggressive
•hygienic/sanitary

Description
3.4 Approvals and certificates
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3.4 Approvals and certificates
Note
For further details see Approvals (Page 183).
SITRANS LR250 is available with approvals for General purpose, sanitary or hygienic and for
hazardous areas. In all cases, check the nameplate on your device, and confirm the approval
rating.
Process Connections
A wide range of process connections and antenna options are available to suit virtually any
vessel configuration.