Siemens SITRANS LR250 PROFIBUS PA User manual

SITRANS
Radar Transmitters
SITRANS LR250 (PROFIBUS PA)
Operating Instructions 01/2014

© Siemens AG 2013
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.
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 AG 2013. 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. Siemens Milltronics Process Instruments will
not be responsible for the contents of partial or whole
reproductions of either bound or electronic versions.
While we have verified the contents of this
manual for agreement with the instrumentation
described, variations remain possible. Thus we
cannot guarantee full agreement. The contents of
this manual are regularly reviewed and
corrections are included in subsequent editions.
We welcome all suggestions for improvement.
Technical data subject to change.
MILLTRONICS®is a registered trademark of Siemens Milltronics Process Instruments.
Contact SMPI Technical Publications European Authorized Representative
at the following address:
Technical Publications Siemens AG
SiemensAG IndustrySector
Siemens Milltronics Process Instruments 76181 Karlsruhe
1954 Technology Drive, P.O. Box 4225 Deutschland
Peterborough, Ontario, Canada, K9J 7B1
Email: [email protected]
For a selection of Siemens Milltronics level measurement manuals, go to:
www. siemens.com/processautomation. Under Process Instrumentation, select
Level Measurement and then go to the manual archive
listed under the product family.
For a selection of Siemens Milltronics weighing manuals, go to:
www. siemens.com/processautomation. Under Weighing Technology, select Continuous Weighing Systems and then go to the manual
archive listed under the product family.

SITRANS LR250 (PROFIBUS PA)
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SITRANS
Radar Transmitters
SITRANS LR250 (PROFIBUS PA)
Operating Instructions
01/2014
A5E32221386
-AB
Introduction
1
Safety notes
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 data
11
Dimension drawings
12
Appendix A: Technical
reference
A
Appendix B: PROFIBUS PA
profile structure
B
Appendix C:
Communications via
PROFIBUS
C
Appendix D: Certificates and
Support
D
List of abbreviations
13
LCD menu structure
14

Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: A5E32221386
Ⓟ
09/2013 Technical data subject to change
Copyright © Siemens AG 2013.
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 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 3
Table of contents
1 Introduction............................................................................................................................................. 9
1.1 The manual ....................................................................................................................................9
1.2 Firmware revision history .............................................................................................................10
2 Safety notes.......................................................................................................................................... 11
2.1 Safety marking symbols...............................................................................................................11
2.2 FCC Conformity ...........................................................................................................................11
2.3 CE Electromagnetic Compatibility (EMC) Conformity..................................................................12
3 Description............................................................................................................................................ 13
3.1 SITRANS LR250 overview...........................................................................................................13
3.2 Programming................................................................................................................................14
3.3 Applications..................................................................................................................................14
3.4 Approvals and certificates............................................................................................................14
4 Installing/mounting ................................................................................................................................ 15
4.1 Pressure applications...................................................................................................................16
4.1.1 Pressure Equipment Directive, PED, 97/23/EC...........................................................................16
4.2 Mounting location.........................................................................................................................16
4.2.1 Nozzle design...............................................................................................................................17
4.2.2 Nozzle location.............................................................................................................................17
4.2.3 Orientation in a vessel with obstructions .....................................................................................20
4.2.4 Mounting on a Stillpipe or Bypass Pipe .......................................................................................20
4.2.5 Stillpipe or Bypass Pipe requirements .........................................................................................21
4.2.6 Device orientation ........................................................................................................................21
4.3 Installation instructions.................................................................................................................22
4.4 Flange bolting, Flanged encapsulated antenna only ...................................................................22
5 Connecting ........................................................................................................................................... 25
5.1 Power ...........................................................................................................................................25
5.2 Connecting SITRANS LR250.......................................................................................................26
5.2.1 Basic PLC configuration with PROFIBUS PA..............................................................................28
5.3 Wiring setups for hazardous area installations ............................................................................28
5.3.1 PLC configuration with PROFIBUS PA for hazardous areas ......................................................29
5.3.2 Intrinsically safe wiring .................................................................................................................30
5.3.3 Non-sparking wiring .....................................................................................................................33

Table of contents
SITRANS LR250 (PROFIBUS PA)
4Operating Instructions, 01/2014, A5E32221386-AB
5.3.4 Non-incendive wiring (US/Canada only) ..................................................................................... 33
5.4 Instructions specific to hazardous area installations................................................................... 34
6 Commissioning ..................................................................................................................................... 35
6.1 Operating via the handheld programmer .................................................................................... 35
6.1.1 Power up ..................................................................................................................................... 35
6.1.2 Handheld programmer functions................................................................................................. 35
6.1.2.1 The LCD display.......................................................................................................................... 36
6.1.2.2 Handheld programmer (Part No. 7ML1930-1BK) ....................................................................... 38
6.1.3 Programming............................................................................................................................... 39
6.1.3.1 Enter program mode ................................................................................................................... 40
6.1.3.2 Navigating: key functions in navigation mode............................................................................. 41
6.1.3.3 Editing in program mode ............................................................................................................. 42
6.1.3.4 Quick Start Wizard via the handheld programmer ...................................................................... 45
6.1.3.5 Auto False Echo Suppression..................................................................................................... 47
6.1.3.6 Requesting an Echo Profile......................................................................................................... 48
6.1.3.7 Device address ........................................................................................................................... 49
6.2 Application examples .................................................................................................................. 50
6.2.1 Liquid resin in storage vessel, level measurement ..................................................................... 51
6.2.2 Horizontal vessel with volume measurement.............................................................................. 53
6.2.3 Application with stillpipe .............................................................................................................. 55
7 Remote operation ................................................................................................................................. 59
7.1 Operating via SIMATIC PDM ...................................................................................................... 59
7.1.1 Functions in SIMATIC PDM ........................................................................................................ 59
7.1.1.1 Features of SIMATIC PDM Rev. 6.0, SP4 or higher................................................................... 60
7.1.1.2 Features of SIMATIC PDM Rev. 5.2, SP1 .................................................................................. 60
7.1.1.3 SIMATIC PDM Version ............................................................................................................... 60
7.1.2 Electronic Device Description (EDD) .......................................................................................... 61
7.1.2.1 Updating the Electronic Device Description (EDD)..................................................................... 61
7.1.2.2 Configuring a new device............................................................................................................ 61
7.1.3 Quick start wizard via SIMATIC PDM ......................................................................................... 62
7.1.4 Changing parameter settings using SIMATIC PDM ................................................................... 68
7.1.5 Parameters accessed via pull-down menus ............................................................................... 69
7.1.5.1 Echo profile utilities ..................................................................................................................... 69
7.1.5.2 Auto false echo suppression....................................................................................................... 73
7.1.5.3 Echo setup .................................................................................................................................. 76
7.1.5.4 Maintenance................................................................................................................................ 77
7.1.5.5 Acknowledge Faults .................................................................................................................... 78
7.1.5.6 Wear............................................................................................................................................ 78
7.1.5.7 Simulation.................................................................................................................................... 79
7.1.5.8 Write locking................................................................................................................................ 81
7.1.5.9 Master reset ................................................................................................................................ 82
7.1.5.10 Factory defaults........................................................................................................................... 82
7.1.5.11 Diagnostics.................................................................................................................................. 83
7.2 Operating via FDT....................................................................................................................... 90

Table of contents
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 5
7.2.1 Device Type Manager (DTM).......................................................................................................90
7.2.2 SITRANS DTM.............................................................................................................................90
7.2.3 The device EDD ...........................................................................................................................91
7.2.4 Configuring a new device via FDT...............................................................................................91
8 Parameter reference ............................................................................................................................. 93
8.1 Alphabetical parameter list.........................................................................................................155
9 Service and maintenance.................................................................................................................... 159
9.1 Maintenance...............................................................................................................................159
9.2 Unit repair and excluded liability ................................................................................................159
9.3 Part replacement........................................................................................................................159
10 Diagnosing and troubleshooting .......................................................................................................... 161
10.1 Device status icons ....................................................................................................................162
10.2 General fault codes....................................................................................................................163
10.3 Operation troubleshooting..........................................................................................................166
11 Technical data .................................................................................................................................... 169
11.1 Power .........................................................................................................................................169
11.2 Performance...............................................................................................................................170
11.3 Interface .....................................................................................................................................171
11.4 Mechanical .................................................................................................................................171
11.5 Environmental ............................................................................................................................173
11.6 Process ......................................................................................................................................173
11.7 Approvals ...................................................................................................................................174
11.8 Programmer (infrared keypad)...................................................................................................175
12 Dimension drawings............................................................................................................................ 177
12.1 Threaded horn antenna .............................................................................................................177
12.2 Threaded horn antenna with extension .....................................................................................180
12.3 Flanged horn antenna................................................................................................................182
12.4 Flanged horn antenna with extension........................................................................................184
12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only) ........................................................186
12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger)...............................................188
12.7 Threaded PVDF antenna ...........................................................................................................190
12.8 Threaded connection markings..................................................................................................191
12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna...................................................192

Table of contents
SITRANS LR250 (PROFIBUS PA)
6Operating Instructions, 01/2014, A5E32221386-AB
12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna.................................... 194
12.11 Flat-Face flange ........................................................................................................................ 197
12.12 Process connection tag (pressure rated versions).................................................................... 200
A Appendix A: Technical reference..........................................................................................................201
A.1 Principles of operation............................................................................................................... 201
A.2 Echo processing........................................................................................................................ 202
A.2.1 Process Intelligence .................................................................................................................. 202
A.2.2 Echo Selection .......................................................................................................................... 203
A.2.3 CLEF Range ............................................................................................................................. 206
A.2.4 Echo Threshold ......................................................................................................................... 206
A.2.5 Echo Lock.................................................................................................................................. 206
A.2.6 Auto False Echo Suppression................................................................................................... 207
A.2.7 Measurement Range................................................................................................................. 209
A.2.8 Measurement Response ........................................................................................................... 209
A.2.9 Damping.................................................................................................................................... 210
A.2.10 Loss of Echo (LOE)................................................................................................................... 210
A.2.10.1 LOE Timer................................................................................................................................. 210
A.2.10.2 Fail-safe Behavior ..................................................................................................................... 211
A.3 Maximum Process Temperature Chart ..................................................................................... 212
A.4 Process Pressure/Temperature Derating Curves ..................................................................... 213
A.4.1 Horn antenna ............................................................................................................................ 214
A.4.2 Flanged horn antenna ............................................................................................................... 215
A.4.3 Flanged encapsulated antenna................................................................................................. 218
A.4.4 PVDF antenna........................................................................................................................... 220
B Appendix B: PROFIBUS PA profile structure ........................................................................................221
B.1 PROFIBUS Level Device Design.............................................................................................. 221
B.2 Block Model............................................................................................................................... 221
B.2.1 Description of the blocks ........................................................................................................... 222
B.2.1.1 Transducer Block function groups ............................................................................................ 222
B.2.1.2 How the transducer block works: .............................................................................................. 223
B.2.1.3 Analog Input Function Blocks 1 and 2 ...................................................................................... 225
C Appendix C: Communications via PROFIBUS ......................................................................................229
C.1 Device configuration.................................................................................................................. 229
C.1.1 SIMATIC PDM........................................................................................................................... 229
C.1.1.1 Electronic Device Description ................................................................................................... 229
C.2 Network configuration ............................................................................................................... 230
C.2.1 The GSD file.............................................................................................................................. 230
C.3 Bus termination ......................................................................................................................... 230
C.4 Power demands ........................................................................................................................ 230
C.5 PROFIBUS address .................................................................................................................. 231

Table of contents
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 7
C.6 Operating as a profile device .....................................................................................................232
C.6.1 Configuring a new device...........................................................................................................232
C.6.2 Configuring PROFIBUS PA with an S7-300/ 400 PLC ..............................................................232
C.7 Cyclic versus acyclic data ..........................................................................................................233
C.7.1 Cyclic data..................................................................................................................................233
C.8 Status byte .................................................................................................................................234
C.9 Condensed status ......................................................................................................................235
C.10 Diagnostics.................................................................................................................................237
C.10.1 Diagnosis reply (available cyclically)..........................................................................................237
C.10.2 Diagnosis object (available cyclically or acyclically) ..................................................................237
C.10.3 Extended mode diagnosis..........................................................................................................238
C.10.4 Condensed mode diagnosis ......................................................................................................239
C.10.5 Acyclic extended diagnostics (general fault codes) ...................................................................240
C.10.6 Acyclic data................................................................................................................................244
D Appendix D: Certificates and Support.................................................................................................. 245
D.1 Certificates .................................................................................................................................245
D.2 Technical support.......................................................................................................................245
13 List of abbreviations ............................................................................................................................ 247
14 LCD menu structure ............................................................................................................................ 249
Glossary ............................................................................................................................................. 255
Index................................................................................................................................................... 261

Table of contents
SITRANS LR250 (PROFIBUS PA)
8Operating Instructions, 01/2014, A5E32221386-AB

SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 9
Introduction
1
1.1
The manual
This manual will help you set up your radar device for optimum performance. For other Siemens
Milltronics level measurement manuals, go to:
Siemens level (http://www.siemens.com/level)
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 (mailto:[e-mail])
Note
This manual applies to the SITRANS LR250 (PROFIBUS PA) only.
Application examples
The application examples used in this manual illustrate typical installations. [See Application
examples (Page 50).] 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.
Note
For industrial use only
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.

Introduction
1.2 Firmware revision history
SITRANS LR250 (PROFIBUS PA)
10 Operating Instructions, 01/2014, A5E32221386-AB
1.2
Firmware 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:
Firmware
rev.
EDD rev.
Date
Changes
1.00.04 1.00.05 12 Jun 2007 •Initial release.
1.01.00 1.01.00 23 Aug 2007 •EDD a)/SIMATIC PDM: improved rendering of
the echo profile and TVT.
1.01.01 1.01.01 26 Sep 2007 •PNO certification release.
1.01.02 1.01.02 10 Jun 2008 •Maintenance release for firmware and
EDDa)
1.01.02 1.01.03 17 Jun 2008 •The internal EDD revision has been
incremented.
1.02.00 1.02.00 27 May 2009 •Harmonization of menu structures and
parameter names across products.
•Display indicates progress towards first
measurement.
1.02.01 1.02.00 7 June 2010 •Display contrast improvement.
•Antenna type parameter cannot be
modified.
1.02.02 1.02.00 24 May 2011 •Threaded PVDF antenna supported.
1.02.03 1.02.01 31 Oct 2012 •Antenna parameter removed.
•Quickstart on local display enhancements.
a) Electronic Device Description

SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 11
Safety notes
2
2.1
Safety marking symbols
In manual
On product
Description
(Label on product: yellow background.) WARNING: refer to
accompanying documents (manual) for details.
2.2
FCC Conformity
US Installations only: Federal Communications Commission (FCC) rules
WARNING
Changes or modifications not expressly approved by Siemens Milltronics could void the
user’s authority to operate the equipment.
Note
•
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment.
•
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference to radio communications, in which case the user will
be required to correct the interference at his own expense.

Safety notes
2.3 CE Electromagnetic Compatibility (EMC) Conformity
SITRANS LR250 (PROFIBUS PA)
12 Operating Instructions, 01/2014, A5E32221386-AB
2.3
CE Electromagnetic Compatibility (EMC) Conformity
This equipment has been tested and found to comply with the following EMC Standards:
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.

SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 13
Description
3
3.1
SITRANS LR250 overview
WARNING
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 and low dielectric media.
The device consists of an electronic circuit coupled to an antenna and either a threaded or
flange type process connection.
This device supports PROFIBUS PA communication protocol, and SIMATIC PDM software.
Signals are processed using Process Intelligence which has been field-proven in over 1,000,000
applications worldwide (ultrasonic and radar). This device supports acyclic communications from
both a PROFIBUS Class I and Class II master.

Description
3.2 Programming
SITRANS LR250 (PROFIBUS PA)
14 Operating Instructions, 01/2014, A5E32221386-AB
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:
●SIMATIC PDM
●FDT/DTM platform (such as PACTware™ or FieldCare)
3.3
Applications
●liquids and slurries
●bulk storage vessels
●simple process vessels
3.4
Approvals and certificates
Note
For further details see
Approvals (Page 174).
SITRANS LR250 is available with General Purpose approval, or 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.

SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 15
Installing/mounting
4
WARNING
•Installation shall only be performed by qualified personnel and in accordance with local
governing regulations.
•Handle the device using the enclosure, not the process connection tag, to avoid
damage.
•Take special care when handling the threaded PVDF and Flanged encapsulated
antennas. Any damage to the antenna surface, particularly to the tip/lens, could affect
performance.
•Materials of construction are chosen based on their chemical compatibility (or inertness)
for general purposes. For exposure to specific environments, check with chemical
compatibility charts before installing.
Note
•
For European Union and member countries, installation must be according to ETSI EN
302372.
•
Refer to the device nameplate for approval information.

Installing/mounting
4.1 Pressure applications
SITRANS LR250 (PROFIBUS PA)
16 Operating Instructions, 01/2014, A5E32221386-AB
4.1
Pressure applications
WARNING
Pressure applications
•Never attempt to loosen, remove, or disassemble process connection or device housing
while vessel contents are under pressure.
•The user is responsible for the selection of bolting and gasket (except for Flanged
encapsulated antenna) materials which will fall within the limits of the process
connection and its intended use and which are suitable for the service conditions.
•For Flanged encapsulated antenna, lens acts as integral gasket, no other required
•Use spring washers for Flanged encapsulated antenna.
•Improper installation may result in loss of process pressure.
Note
•
The process connection tag shall remain with the process pressure boundary assembly.
(The process pressure boundary assembly comprises the components that act as a
barrier against pressure loss from the process vessel: that is, the combination of process
connection body and emitter, but normally excluding the electrical enclosure).
•
SITRANS LR250 units are hydrostatically tested, meeting or exceeding the requirements
of the ASME Boiler and Pressure Vessel Code and the European Pressure Equipment
Directive.
4.1.1
Pressure Equipment Directive, PED, 97/23/EC
Siemens Level Transmitters with flanged, threaded, or sanitary clamp type process mounts have
no pressure-bearing housing of their own and, therefore, do not come under the Pressure
Equipment Directive as pressure or safety accessories (see EU Commission Guideline 1/8 and
1/20).
4.2
Mounting location
Note
•
Correct location is key to a successful application.
•
Avoid reflective interference from vessel walls and obstructions by following the
guidelines below:

Installing/mounting
4.2 Mounting location
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB 17
4.2.1
Nozzle design
Threaded PVDF antenna
Stainless steel horn antenna
Flanged encapsulated antenna
①
Minimum clearance: 10 mm (0.4")
②
Minimum diameter: 50 mm (2")
③
Maximum nozzle length: 500
mm (20")
●The end of the antenna must protrude a minimum of 10 mm (0.4") to avoid false echoes
being reflected from the nozzle1).
●Minimum recommended nozzle diameter for the threaded PVDF antenna is 50 mm (2").
●An antenna extension (100 mm/3.93") is available for any version except the Threaded PVDF
and Flanged encapsulated antenna (FEA).
●The maximum nozzle length for the FEA is 500 mm (20").
1) Not applicable for FEA
4.2.2
Nozzle location
●Avoid central locations on tall, narrow vessels
●Nozzle must be vertical
Preferre
d
Unde
sirable

Installing/mounting
4.2 Mounting location
SITRANS LR250 (PROFIBUS PA)
18 Operating Instructions, 01/2014, A5E32221386-AB
Environment
●Provide an environment suitable to the housing rating and materials of construction.
●Provide a sunshield if the device will be mounted in direct sunlight.
①
Ambient temperature
②
Process temperature (at process connection)
Antenna
①
②
Horn -40 to +80 °C
(-40 to +176 °F)
with FKM O-ring:-40 to +200 °C (-40 to
392 °F)
with FFKM O-ring:-20 to +200 °C (-4 to
+392 °F)
PVDF -40 to +80 °C
(-40 to +176 °F)
-40 to +80 °C
(-40 to +176 °F)
Flanged encapsulated -40 to +80 °C
(-40 to +176 °F)
-40 to +170 °C
(-40 to +338 °F)
Access for programming
●Provide easy access for viewing the display and programming via the handheld programmer.