Siemens sitrans lr 460 User manual

SITRANS LR460
SITRANS L
Radar transmitters
SITRANS LR460
Operating Instructions
7ML5426 (LR460)
10/2021
A5E42035355
-AB
Introduction
1
Safety notes
2
Description
3
Installing/mounting
4
Connecting
5
Commissioning
6
Remote operation
7
Parameter assignment
8
Service and maintenance
9
Troubleshooting
10
Technical specifications
11
Dimension drawing
12
Technical reference
A
HART communications
B
HART information structure
C
Communications via
PROFIBUS PA
D
PROFIBUS PA profile
structure
E
Local operation interface
F
LCD menu structure
G
List of abbreviations
H
Product documentation and
support
I

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E42035355
Ⓟ
06/2022 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 LR460
Operating Instructions, 10/2021, A5E42035355-AB 3
Table of contents
1 Introduction ........................................................................................................................................... 9
1.1 Purpose of this documentation ............................................................................................ 9
1.2 FW revision history ............................................................................................................ 10
1.3 Designated use.................................................................................................................. 10
1.4 Security information .......................................................................................................... 11
1.5 Transportation and storage................................................................................................ 11
1.6 Notes on warranty ............................................................................................................. 12
2 Safety notes......................................................................................................................................... 13
2.1 Precondition for use........................................................................................................... 13
2.2 Laws and directives............................................................................................................ 13
2.3 Conformity with European directives.................................................................................. 14
2.4 Conformity with UK regulations ......................................................................................... 14
2.5 Radio Equipment - EU Directive (RED) 2014/53/EU and UK regulation SI 2017/1206 ............ 15
2.6 US installations only: Federal Communications Commission (FCC) rules.............................. 15
2.7 Canadian Installations only: Industry Canada (IC) rules ....................................................... 15
2.8 Safety notes....................................................................................................................... 16
2.8.1 Safety marking symbols ..................................................................................................... 17
3 Description........................................................................................................................................... 18
3.1 SITRANS LR460 .................................................................................................................. 18
4 Installing/mounting ............................................................................................................................. 19
4.1 Installation location requirements...................................................................................... 19
4.2 Mounting location ............................................................................................................. 20
4.3 Nozzle design .................................................................................................................... 21
4.4 Nozzle location .................................................................................................................. 22
4.5 Installation in vessel with obstructions ............................................................................... 23
4.6 Easy Aimer installation....................................................................................................... 24
4.7 Air purging system (optional)............................................................................................. 26
4.8 Universal slotted flange (for use with Air Purging Option only) ........................................... 28
4.9 Optional dust cap............................................................................................................... 29
4.10 Incorrect disassembly......................................................................................................... 31

Table of contents
SITRANS LR460
4Operating Instructions, 10/2021, A5E42035355-AB
5 Connecting .......................................................................................................................................... 32
5.1 Basic safety notes .............................................................................................................. 32
5.2 Connecting SITRANS LR460................................................................................................ 33
5.3 HART wiring....................................................................................................................... 34
5.4 Connecting HART............................................................................................................... 35
5.5 PROFIBUS wiring................................................................................................................ 37
5.6 Connecting PROFIBUS PA ................................................................................................... 38
5.7 Product Nameplate ............................................................................................................ 39
5.8 Instructions specific to hazardous area installations............................................................ 40
5.8.1 European Directive 2014/34/EU, Annex II, 1.0.6 and UK Regulation SI 2016/1107............... 40
5.8.2 Special conditions for safe use ........................................................................................... 41
6 Commissioning .................................................................................................................................... 42
6.1 Basic safety notes .............................................................................................................. 42
6.2 Quick start......................................................................................................................... 43
6.2.1 Quick start......................................................................................................................... 43
6.2.2 Activating SITRANS LR460.................................................................................................. 43
6.2.3 RUN mode display.............................................................................................................. 44
6.2.4 Programming SITRANS LR460 ............................................................................................ 44
6.2.5 The handheld programmer and PROGRAM mode display .................................................... 45
6.2.6 Quick start wizard via the handheld programmer ............................................................... 46
6.2.7 Quick start (1.) .................................................................................................................. 47
6.2.8 Quick start wizard via SIMATIC PDM ................................................................................... 49
6.2.9 Quick start wizard steps ..................................................................................................... 51
6.2.10 Level application example.................................................................................................. 54
6.2.11 Auto false echo suppression............................................................................................... 55
7 Remote operation................................................................................................................................ 56
7.1 Operating SITRANS LR460 via SIMATIC PDM ....................................................................... 56
7.2 Echo profile saving and viewing......................................................................................... 57
7.3 Trend diagram (Level Trend over Time) .............................................................................. 58
7.4 Manual TVT shaper ............................................................................................................ 59
7.5 Accessing functions in PDM ............................................................................................... 60
7.6 Changing parameter settings via SIMATIC PDM................................................................... 61
7.7 Parameters accessed via pull-down menus ......................................................................... 62
7.8 Pull-down menus for HART via SIMATIC PDM...................................................................... 63
7.9 Pull-down menus for PROFIBUS PA via SIMATIC PDM........................................................... 64
7.10 Simulation......................................................................................................................... 65

Table of contents
SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 5
8 Parameter assignment......................................................................................................................... 67
8.1 Parameter menus .............................................................................................................. 67
8.2 Quick start wizard.............................................................................................................. 67
8.3 Quick start (1.)................................................................................................................... 68
8.4 Identification (IDENT) (2.) .................................................................................................. 71
8.4.1 Operation unit ................................................................................................................... 71
8.4.2 Configuration (CONFIG) (for HART devices) (2.1.)............................................................... 71
8.4.3 Configuration (CONFIG) (for PROFIBUS PA devices) (2.1.) ................................................... 73
8.4.4 Device (2.2.)...................................................................................................................... 75
8.4.5 Statistics (STATS) (2.3.)...................................................................................................... 77
8.5 Input (3.)........................................................................................................................... 77
8.5.1 Input (3.)........................................................................................................................... 77
8.5.2 Standard setup (ST SETUP) (3.2.)........................................................................................ 78
8.5.3 Sensor calibration (SENSOR CAL) (3.3.) .............................................................................. 79
8.5.4 Measuring limits (MEAS LIM) (3.4.) .................................................................................... 82
8.5.5 Detailed setup (DT SETUP) (3.5.) ........................................................................................ 83
8.5.5.1 Fail-safe (3.5.1.) ................................................................................................................ 83
8.5.5.2 Echo select (ECHO SEL) (3.5.2.).......................................................................................... 84
8.5.5.3 Sampling (ECHO SAMP) (3.5.3.) ......................................................................................... 86
8.5.5.4 Range (3.5.4.) ................................................................................................................... 87
8.5.5.5 TVT (Auto false echo suppression) setup (3.5.6.) ................................................................ 88
8.5.5.6 TVT shaper (3.5.7.) ............................................................................................................ 92
8.5.5.7 Rate (3.5.8.) ...................................................................................................................... 93
8.5.6 Echo information (ECHO INFO) (3.6.) ................................................................................. 94
8.5.6.1 Level transducer block (TB VALUES) (3.6.1.) ....................................................................... 94
8.5.6.2 Echo quality (ECHO QUAL) (3.6.2.)..................................................................................... 94
8.6 Output (4.) ........................................................................................................................ 95
8.6.1 Analog input function block 1 (AIFB 1) ............................................................................... 95
8.6.2 Target mode (TARGET MDE) (4.1.1.) .................................................................................. 95
8.6.3 Unit (4.1.2.)....................................................................................................................... 96
8.6.4 Filter time constant (FILT TIME) (4.1.3.) ............................................................................. 96
8.6.5 Function (CHANNEL) (4.1.4.) ............................................................................................. 96
8.6.6 Batch information (BATCH) (PROFIBUS PA only).................................................................. 96
8.6.7 Process value scale (PR VAL SCL) (4.1.6.) ............................................................................ 97
8.6.8 Output scale (OUT SCALE) (4.1.7.) ..................................................................................... 98
8.6.9 Output limits (OUT. LIM) (4.1.8.)........................................................................................ 99
8.6.10 Failsafe (PROFIBUS PA only) (4.1.9.)................................................................................. 101
8.6.11 Human interface (INTERFACE) (4.1.A) .............................................................................. 101
8.6.12 Analog input function block 2 (AIFB 2) (4.2.).................................................................... 101
8.6.13 mA output (HART only) (4.3.)........................................................................................... 101
8.6.14 Relay configuration (RLY CONFIG) (HART only) (4.4.)........................................................ 104
8.7 Maintenance settings (MAINT SET) (6.) ............................................................................ 104
8.7.1 Remaining device lifetime (DVC REMLIF) (6.1.)................................................................. 104
8.7.2 Remaining sensor lifetime (SNS REMLIF) (6.2.) ................................................................. 109
8.7.3 Service interval (SERVICE) (6.3.) ....................................................................................... 112
8.8 Condensed status setup (COND SETUP) PROFIBUS PA only (7.).......................................... 114
8.8.1 Condensed status setup (COND SETUP)(Profibus PA only) (7.)........................................... 114

Table of contents
SITRANS LR460
6Operating Instructions, 10/2021, A5E42035355-AB
9 Service and maintenance .................................................................................................................. 118
9.1 Maintenance ................................................................................................................... 118
9.1.1 Unit repair and excluded liability ...................................................................................... 118
9.2 Cleaning.......................................................................................................................... 119
9.2.1 Cleaning the antenna ...................................................................................................... 119
9.3 Return procedure............................................................................................................. 120
9.4 Disposal........................................................................................................................... 120
10 Troubleshooting ................................................................................................................................ 121
10.1 Troubleshooting .............................................................................................................. 121
10.2 General fault codes.......................................................................................................... 123
11 Technical specifications..................................................................................................................... 125
11.1 Power.............................................................................................................................. 125
11.2 Performance.................................................................................................................... 125
11.3 Interface.......................................................................................................................... 126
11.4 Mechanical...................................................................................................................... 127
11.5 Programmer (infrared keypad) ......................................................................................... 127
11.6 Environmental................................................................................................................. 128
11.7 Process ............................................................................................................................ 128
11.8 Communication............................................................................................................... 129
11.9 Approvals ........................................................................................................................ 129
12 Dimension drawing ........................................................................................................................... 130
12.1 Dimension drawings ........................................................................................................ 130
A Technical reference ........................................................................................................................... 131
A.1 Principles of operation ..................................................................................................... 131
A.2 Measurement response.................................................................................................... 131
A.3 Echo processing............................................................................................................... 132
A.3.1 Profile monitoring via SIMATIC PDM ................................................................................. 132
A.4 False echoes.................................................................................................................... 133
A.4.1 False echoes.................................................................................................................... 133
A.4.2 Auto false echo suppression............................................................................................. 134
A.4.3 Near range (blanking)...................................................................................................... 134
A.4.4 Echo confidence .............................................................................................................. 134
A.4.5 Fail-safe mode................................................................................................................. 135
A.5 Maximum process temperature chart............................................................................... 136
B HART communications....................................................................................................................... 138
B.1 HART communication ...................................................................................................... 138

Table of contents
SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 7
C HART information structure............................................................................................................... 140
C.1 HART information structure.............................................................................................. 140
C.2 Block Model..................................................................................................................... 140
C.3 HART communicator 375 menu structure......................................................................... 141
C.4 Level transducer block (LTB)............................................................................................. 144
D Communications via PROFIBUS PA .................................................................................................... 146
D.1 Communication via PROFIBUS PA ..................................................................................... 146
D.2 Operating as a profile device............................................................................................ 147
D.3 Cyclic versus acyclic data.................................................................................................. 148
D.4 Cyclic data ....................................................................................................................... 148
D.5 Status byte ...................................................................................................................... 149
D.6 Condensed status ............................................................................................................ 151
D.7 Diagnosis reply (available cyclically) ................................................................................. 153
D.8 Acyclic diagnostics ........................................................................................................... 153
D.9 Extended mode diagnosis ................................................................................................ 154
D.10 Condensed mode diagnosis ............................................................................................. 155
D.11 Acyclic extended diagnostics (general fault codes) ........................................................... 156
D.12 Acyclic data ..................................................................................................................... 159
E PROFIBUS PA profile structure ........................................................................................................... 160
E.1 PROFIBUS level device design........................................................................................... 160
E.2 Block Model..................................................................................................................... 160
E.3 Transducer Block function groups .................................................................................... 161
E.4 How the transducer block works ...................................................................................... 162
E.5 Analog input function blocks 1 and 2 ............................................................................... 164
E.6 AIFB function groups ....................................................................................................... 164
E.7 How AIFBs work............................................................................................................... 164
E.8 AIFB execution steps:....................................................................................................... 165
F Local operation interface................................................................................................................... 166
F.1 The LCD display ............................................................................................................... 166
F.2 RUN mode (startup display).............................................................................................. 166
F.3 The handheld programmer .............................................................................................. 167
F.4 Handheld programmer: key functions in RUN mode ......................................................... 168
F.5 Programming via the handheld programmer .................................................................... 169
F.6 Handheld programmer: key functions in Navigation mode ............................................... 170
F.7 Handheld programmer: key functions in Edit mode .......................................................... 170

Table of contents
SITRANS LR460
8Operating Instructions, 10/2021, A5E42035355-AB
G LCD menu structure ........................................................................................................................... 172
G.1 LCD menu structure......................................................................................................... 172
H List of abbreviations .......................................................................................................................... 177
H.1 Abbreviations .................................................................................................................. 177
I Product documentation and support ................................................................................................ 179
I.1 Product documentation ................................................................................................... 179
I.2 Technical support ............................................................................................................ 180
Glossary ............................................................................................................................................. 181
Index.................................................................................................................................................. 186

SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 9
Introduction
1
1.1 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.

Introduction
1.2 FW revision history
SITRANS LR460
10 Operating Instructions, 10/2021, A5E42035355-AB
1.2 FW revision history
Note
The software revision number of the device is shown on the sticker on the product.
PROFIBUS PA
Software revision
DD rev.
Date
Changes
1.05.03
1.05.03
May 28, 2008
•Updated I & M call functions.
•Improved DD user interface.
•
Supports PDM 5.2.
1.04.04
1.04.04
Apr. 16, 2008
No longer reports an incorrect diagnos-
tic in the measurement process.
1.04.02
1.04.04
Jun. 29, 2007
Initial release.
HART
Software revision
DD rev.
Date
Changes
1.05.03
1.05.03
May 28, 2008
•Improved DD user interface.
•
Supports PDM 5.2.
1.04.04
1.04.05
Apr. 16, 2008
No longer reports an incorrect diagnos-
tic in the measurement process.
1.04.02
1.04.05
Jun. 29, 2007
New mA/HART hardware.
1.03.00-00
1.03.01-00
Jan. 12, 2007
Initial release.
1.3 Designated use
Use the device in accordance with the information on the nameplate and in the Technical
specifications (Page 125).

Introduction
1.4 Security information
SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 11
1.4 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.
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/industrialsecurity (https://www.siemens.com/industrialsecurity).
1.5 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.
NOTICE
Insufficient protection during storage
The packaging only provides limited protection against moisture and infiltration.
•
Provide additional packaging as necessary.
Special conditions for storage and transportation of the device are listed in Technical
specifications (Page 125).

Introduction
1.6 Notes on warranty
SITRANS LR460
12 Operating Instructions, 10/2021, A5E42035355-AB
1.6 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 LR460
Operating Instructions, 10/2021, A5E42035355-AB 13
Safety notes
2
2.1 Precondition for 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.
2.2 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 notes
2.3 Conformity with European directives
SITRANS LR460
14 Operating Instructions, 10/2021, A5E42035355-AB
2.3 Conformity with European directives
The CE marking on the device symbolizes the conformity with the following European
directives:
Electromagnetic compatibil-
ity 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 de-
signed 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 relating to
equipment and protective systems intended for use in potential-
ly explosive atmospheres
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 repeal-
ing Directive 1999/5/EC
2011/65/EU RoHS
Directive of the European Parliament and the Council on the
restrict
ion of the use of certain hazardous substances in electri-
cal and electronic equipment
The applicable directives can be found in the EU declaration of conformity of the specific
device.
2.4 Conformity with UK regulations
The UKCA marking on the device symbolizes the conformity with the following UK
regulations:
Electromagnetic compatibility
SI 2016/1091
Electromagnetic Compatibility Regulations
2016
Low Voltage
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
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.

Safety notes
2.5 Radio Equipment - EU Directive (RED) 2014/53/EU and UK regulation SI 2017/1206
SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 15
2.5 Radio Equipment - EU Directive (RED) 2014/53/EU and UK
regulation SI 2017/1206
Hereby, Siemens declares that the SITRANS LR460 is in compliance with the essential
requirements and other relevant provisions of Directive 2014/53/EU.
The LR460 complies with EN 302 372 for use in closed storage vessels, when installed
according to the installation requirements of EN 302 372, and may be used in all EU
countries.
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
2.6 US installations only: Federal Communications Commission (FCC)
rules
US Installations only: Federal Communications Commission (FCC) rules
•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.
2.7 Canadian Installations only: Industry Canada (IC) rules
•This device shall be installed and operated in a completely enclosed container to prevent
RF emission, which otherwise can interfere with aeronautical navigation. Installation shall
be done by trained installers, in strict compliance with the manufacturer’s instructions.
•The use of this device is on a ’no-protection non-interference’ basis.
–The user shall accept operations of high powered radar in the same frequency band,
which may interfere with or damage this device.
–The user is responsible for removing, at the user’s expense, any device found to
interfere with primary licensing operations.

Safety notes
2.8 Safety notes
SITRANS LR460
16 Operating Instructions, 10/2021, A5E42035355-AB
2.8 Safety notes
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.
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 notes
2.8 Safety notes
SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 17
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
Use in hazardous area
Risk of explosion.
•Only use equipment that is approved for use in the intended hazardous area and labeled
accordingly.
•Do not use devices that have been operated outside the conditions specified for
hazardous areas. If you have used the device outside the conditions for hazardous areas,
make all Ex markings unrecognizable on the nameplate.
2.8.1 Safety marking symbols
In manual
On product
Description
(Label on product:
yellow back-
ground.)
WARNING: refer to accompanying documents (manual) for
details.

SITRANS LR460
18 Operating Instructions, 10/2021, A5E42035355-AB
Description
3
3.1 SITRANS LR460
SITRANS LR460 is a 4-wire, 24 GHz FMCW (Frequency Modulated/Continuous Wave) radar
level transmitter for continuous monitoring of solids in silos to a range of 100 meters (329
ft). It is ideal for applications with extreme dust and high temperatures to +200 °C (+392 °F).
The Easy Aimer design makes it easy to install the device and orient the signal towards the
material angle of repose. The high frequency signal creates a narrow emission cone, which
makes the LR460 quite insensitive to vessel interferences.
SITRANS LR460 is available with an optional air purge connection for cleaning the interior of
the antenna.
Programming
SITRANS LR460 carries out its level measurement function according to the set of built-in
parameter tables. You can make parameter changes via the Siemens handheld programmer,
a PC running SIMATIC PDM or other similar software packages.
Approvals and certificates
SITRANS LR460 is available with General Purpose approval, or approval for hazardous areas
containing dust. For details see Approvals (Page 129).
System implementation
SITRANS LR460 supports HART communication protocol, or PROFIBUS PA (optional), and
SIMATIC PDM software.

SITRANS LR460
Operating Instructions, 10/2021, A5E42035355-AB 19
Installing/mounting
4
4.1 Installation location requirements
Note
•
For European Union and member countries, installation must be according to ETSI EN
302372.
•
Refer to device nameplate for approval information.
•
Use appropriate conduit and conduit fittings or cable glands, to maintain IP or NEMA
rating.
•
Observe all maximum permissible ambient and process temperatures. Refer to Maximum
process temperature chart (Page 136).
•
For US and Canadian installations, see US installations only: Federal Communications
Commission (FCC) rules (Page 15) and Canadian Installations only: Industry Canada (IC)
rules (Page 15).
NOTICE
Direct sunlight
Damage to device.
The device can overheat or materials become brittle due to UV exposure.
•Protect the device from direct sunlight.
•Make sure that the maximum permissible ambient temperature is not exceeded. Refer to
the information in Technical specifications (Page 125).
NOTICE
Strong vibrations
Damage to device.
•In installations with strong vibrations, mount the transmitter in a low vibration
environment.

Installing/mounting
4.2 Mounting location
SITRANS LR460
20 Operating Instructions, 10/2021, A5E42035355-AB
NOTICE
Incorrect mounting
The device can be damaged, destroyed, or its functionality impaired through improper
mounting.
•Before installing ensure there is no visible damage to the device.
•Make sure that process connectors are clean, and suitable gaskets and glands are used.
•Mount the device using suitable tools. Refer to the information in Technical
specifications (Page 125).
4.2 Mounting location
•Provide easy access for viewing the display and programming via the handheld
programmer.
•Provide an environment suitable to the housing rating and materials of construction.
•Provide a sun shield if the device is mounted in direct sunlight.
①
ambient temperature max. +65 °C (+149 °F)
②
flange temperature
③
process temperature max. +200 °C (+392 °F)