Siemens SITRANS LR260 User manual

SITRANS
Radar Transmitters
SITRANS LR260 (HART)
Operating Instructions 12/2012

© Siemens AG 2012
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 2012. 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
Siemens AG Industry Sector
Siemens Milltronics Process Instruments 76181 Karlsruhe
1954 Technology Drive, P.O. Box 4225 Deutschland
Peterborough, Ontario, Canada, K9J 7B1
Email: [e-mail]
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.

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Table of Contents
Table of Contents
Table of Contents ...............................................................................................................i
Safety Notes ...........................................................................................................................................1
Safety marking symbols ............................................................................................................1
FCC Conformity ......................................................................................................................................1
CE Electromagnetic Compatibility (EMC) Conformity ...................................................................2
The Manual ............................................................................................................................................3
Technical Support .................................................................................................................................3
SITRANS LR260 Overview ................................................................................................5
Specifications ....................................................................................................................6
Power............................................................................................................................................. 6
Performance................................................................................................................................. 6
Interface ........................................................................................................................................ 7
Mechanical (Easy Aimer model) ............................................................................................. 7
Mechanical (Threaded Connection model) .......................................................................... 8
Environmental .............................................................................................................................. 8
Process.......................................................................................................................................... 8
Approvals ...................................................................................................................................... 8
Programmer (infrared keypad) ................................................................................................ 9
Dimensions: .........................................................................................................................................10
Threaded Horn Antenna with extension .............................................................................11
Threaded Horn dimensions ....................................................................................................12
.......................................................................................................................................................12
Installation ........................................................................................................................13
Mounting location ...............................................................................................................................14
Nozzle design .............................................................................................................................14
Nozzle location ..........................................................................................................................14
Orientation in a vessel with obstructions ............................................................................15
Easy Aimer ............................................................................................................................................16
Air Purging System (Optional) .........................................................................................................17
Universal Slotted Flange .........................................................................................................18
Dust Cap (Optional) .............................................................................................................................19
Wiring ................................................................................................................................20
Power .....................................................................................................................................................20
Connecting SITRANS LR260 .............................................................................................................20
Intrinsically Safe wiring........................................................................................................... 22
Non-incendive wiring (US/Canada only) .............................................................................24
For power demands see
Startup Behavior on page 105 ...........................................................24
Instructions specific to hazardous area installations ................................................................24
Quick Start via local operation .....................................................................................26
Activating SITRANS LR260 ...............................................................................................................26
The LCD Display ........................................................................................................................26
Handheld Programmer (Part No. 7ML1930-2AJ) ...............................................................28
Programming SITRANS LR260 ...............................................................................................29
Quick Start Wizard via the handheld programmer .....................................................................32

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Table of Contents
Requesting an Echo Profile ..............................................................................................................34
Device Address ...................................................................................................................................34
Auto False Echo Suppression ..........................................................................................................34
Level application example ................................................................................................................35
Operating via SIMATIC PDM .........................................................................................36
Functions in SIMATIC PDM ..............................................................................................................36
Electronic Device Description (EDD) ....................................................................................37
Configuring a new device .......................................................................................................37
Quick Start Wizard via SIMATIC PDM ..........................................................................................37
Changing parameter settings using SIMATIC PDM ...................................................................41
Parameters accessed via pull-down menus ......................................................................41
Parameter Reference .....................................................................................................49
Pull-down menus via SIMATIC PDM .............................................................................................49
Quick Start Wizard ..............................................................................................................................50
Quick Start ............................................................................................................................................ 50
Setup ......................................................................................................................................................52
Device .......................................................................................................................................... 52
Input ..............................................................................................................................................52
Output ...........................................................................................................................................63
Fail-safe .......................................................................................................................................66
Diagnostics ...........................................................................................................................................67
Echo Profile ................................................................................................................................67
Measured Values (MEAS. VALUES)..................................................................................... 67
Remaining Device Lifetime (REMAIN. DEV. LIFE.) ............................................................68
Remaining Sensor Lifetime (REMAIN SENS. LIFE.) ..........................................................71
Service ...................................................................................................................................................73
Device Reset .............................................................................................................................. 73
Manufacture Date (MANUF. DATE) .....................................................................................73
LCD Fast Mode ..........................................................................................................................74
LCD Contrast ..............................................................................................................................74
Powered Hours ..........................................................................................................................74
Power-on Resets....................................................................................................................... 74
Memory Test (MEM. TEST) .................................................................................................... 74
Service Interval.......................................................................................................................... 75
Calibration Interval (CALIB. INTERVAL) ...............................................................................77
Communication ....................................................................................................................................80
Device Address ......................................................................................................................... 80
Communication Control ...........................................................................................................80
Security .................................................................................................................................................81
Lock .............................................................................................................................................. 81
Unlock value ...............................................................................................................................81
Language ..............................................................................................................................................81
Appendix A: Alphabetical Parameter List ..................................................................83
Appendix B: Troubleshooting .......................................................................................87
Communication Troubleshooting ....................................................................................................87
Device Status Icons ...........................................................................................................................88
General Fault Codes ...........................................................................................................................89
Operation Troubleshooting ...............................................................................................................93

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Table of Contents
Appendix C: Maintenance .............................................................................................95
Unit Repair and Excluded Liability ..................................................................................................95
Appendix D: Technical Reference ...............................................................................96
Principles of Operation ......................................................................................................................96
Echo Processing .................................................................................................................................96
Process Intelligence .................................................................................................................96
Time Varying Threshold (TVT) Curves .................................................................................97
Echo Lock ....................................................................................................................................97
Echo Position Detection ..........................................................................................................97
Auto False Echo Suppression ................................................................................................98
Measurement Range .........................................................................................................................98
Near Range ................................................................................................................................98
Far Range ....................................................................................................................................99
Measurement Response ...................................................................................................................99
mA Output .............................................................................................................................................99
Damping ..............................................................................................................................................100
Loss of Echo (LOE) ............................................................................................................................100
Fail-safe Mode ...................................................................................................................................100
Fail-safe Timer .........................................................................................................................101
Fail-safe Material Level .........................................................................................................101
Fail-safe Level ..........................................................................................................................101
Process Pressure/Temperature derating curves .....................................................................102
Horn Antenna .....................................................................................................................................103
Loop power .........................................................................................................................................104
Typical Connection Drawing ................................................................................................104
Allowable operating area of SITRANS LR260 ..................................................................104
Startup Behavior .....................................................................................................................105
Appendix E: Application Example ..............................................................................107
Flour in steel storage vessel, level measurement ....................................................................107
Appendix F: HART Communications .........................................................................109
SIMATIC PDM ...................................................................................................................................109
HART Electronic Device Description (EDD) ................................................................................109
HART Version ...........................................................................................................................109
HART Burst Mode ...................................................................................................................109
HART Multidrop .......................................................................................................................109
HART Communicator 375 Menu Structure ................................................................................110
Supported HART Commands .........................................................................................................113
Universal and Common Practice Commands ..................................................................113
Device Specific Commands ..................................................................................................113
Appendix G: Firmware Revision History ...................................................................114
Glossary ..........................................................................................................................115
Index ................................................................................................................................119
LCD menu structure ......................................................................................................121

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Table of Contents
Notes

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 1
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SITRANS LR260
Safety Notes
Special attention must be paid to warnings and notes highlighted from the rest of the text
by grey boxes.1)
Safety marking symbols
FCC Conformity
US Installations only: Federal Communications Commission (FCC) rules
WARNING: relates to a caution symbol on the product, and means
that failure to observe the necessary precautions can result in death,
serious injury, and/or considerable material damage.
WARNING1: means that failure to observe the necessary
precautions can result in death, serious injury, and/or considerable
material damage.
Note: means important information about the product or that part of the operating
manual.
1) This symbol is used when there is no corresponding caution symbol on the product.
In manual On product Description
Earth (ground) Terminal
Protective Conductor Terminal
(Label on product: yellow background.) WARNING: refer
to accompanying documents (manual) for details.
WARNING: Changes or modifications not expressly approved by
Siemens Milltronics could void the user’s authority to operate the
equipment.
Notes:
• This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment.
• This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference to radio communications, in which case
the user will be required to correct the interference at his own expense.

Page 2 SITRANS LR260 (HART) – INSTRUCTION MANUAL 7ML19985KE03
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SITRANS LR260
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.

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 3
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SITRANS LR260
The Manual
This manual will help you set up your SITRANS LR260 for optimum performance. We
always welcome suggestions and comments about manual content, design, and
accessibility. Please direct your comments to [email protected].
For other Siemens Milltronics level measurement manuals, go to:
www.siemens.com/level and look under Level Measurement.
Application Examples
The application examples used in this manual illustrate typical installations using
SITRANS LR260 (see
Appendix E: Application Example on page 107). Because there is
often a range of ways to approach an application, other configurations may also apply.
In all examples, substitute your own application details. If the examples do not apply to
your application, check the applicable parameter reference for the available options.
Technical Support
Support is available 24 hours a day.
To find your local Siemens Automation Office address, phone number, and fax number go
to:
www.siemens.com/automation/partner
• Click on the tab Contacts by Product and then find your product group (+Process
Automation > +Process Instrumentation > +Level Measuring Instruments).
• Select the team Tech ni ca l Su pp or t . Click on Next.
• Click on the appropriate continent, then select the country followed by the city.
Click on Next.
For on-line technical support go to:
www.siemens.com/automation/support-request
• Enter the device name (SITRANS LR260) or order number, then click on Search,
and select the appropriate product type. Click on Next.
• You will be prompted to enter a keyword describing your issue. Then either
browse the relevant documentation, or click on Next to email a detailed
description of your issue to Siemens Technical Support staff.
Siemens A&D Technical Support Center: phone [phone]
fax [phone]
Notes:
• Please follow the installation and operating procedures for a quick, trouble-free
installation and to ensure the maximum accuracy and reliability of your SITRANS LR260.
• This manual applies to the SITRANS LR260 (HART) only.

Page 4 SITRANS LR260 (HART) – INSTRUCTION MANUAL 7ML19985KE03
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SITRANS LR260
Abbreviations and Identifications
Short form Long Form Description Units
A/D Analog to digital
CE / FM / CSA Conformité Européenne / Factory Mutual /
Canadian Standards Association safety approval
CiInternal capacitance F
D/A Digital to analog
DAC Digital Analog Converter
DCS Distributed Control System control room
apparatus
dK dielectric constant
ESD Electrostatic Discharge
HART Highway Addressable Remote Transducer
IiInput current mA
IoOutput current mA
IS Intrinsically Safe safety approval
LiInternal inductance mH
mH milliHenry 10-3 H
F microFarad 10-6 F
smicrosecond 10-6 s
PED Pressure Equipment Directive safety approval
pF pico Farads 10-12 F
ppm parts per million
PV Primary Variable measured value
SV Secondary Variable equivalent value
TVT Time Varying Threshold sensitivity
threshold
UiInput voltage V
UoOutput voltage V

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 5
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SITRANS LR260
SITRANS LR260 Overview
SITRANS LR260 is a 2-wire 25 GHz pulse radar level transmitter for continuous monitoring
of solids and liquids in storage vessels including extreme levels of dust and high
temperatures, to a range of 30 m (98.4 ft).
The instrument consists of an electronic component coupled to a horn antenna with an
integral Easy Aimer and flange or threaded connection for quick and easy positioning. A
dust cover or air purging are available as options.
SITRANS LR260 supports HART1) 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).
Programming
SITRANS LR260 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 via SIMATIC PDM.
Applications
• cement powder, plastic powder/pellets, grain, flour, coal, and other applications
• solids and liquids bulk storage vessels
Approvals and Certificates
SITRANS LR260 is available with General Purpose approval, or for Hazardous areas. For
details, see
Approvals on page 8.
1) HART® is a registered trademark of the HART Communication Foundation

Page 6 SITRANS LR260 (HART) – INSTRUCTION MANUAL 7ML19985KE03
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Specifications
Specifications
Power
• Maximum 30 V DC
• 4 to 20 mA
• Max startup current see
Startup Behavior on page 105
Performance
Reference operating conditions according to IEC 60770-1
• ambient temperature +15 to +25 °C (+59 to +77 °F)
• humidity 45% to 75% relative humidity
• ambient pressure 860 to 1060 mbar g (86000 to 106000 N/m2 g)
Measurement Accuracy (measured in accordance with IEC 60770-1)
• Maximum measured error (including hysteresis and non-repeatability)
- 25 mm (1") from minimum detectable distance to
300 mm (11.8")
- Remainder of range = 10 mm (0.39") or 0.1% of span
(whichever is greater)
Frequency K-band (25 GHz nominal)
Max. measurement range1)
• solids 2" horn: 10 m (32.8 ft)
3" horn: 20 m (65.6 ft)
4" horn: 30 m (98.4 ft)
• liquids 2" horn: 20 m (65.6 ft)
3" horn: 30 m (98.4 ft)
4" horn: 30 m (98.4 ft)
Min. detectable distance2) 0.05 m (1.97") from end of horn
Update time3) minimum 2 seconds, depending on settings for
Response Rate (2.2.7.1.) and LCD Fast Mode (4.3.)
Note: Siemens Milltronics makes every attempt to ensure the accuracy of these
specifications but reserves the right to change them at any time.
Nominal 24 V DC with
max. 550 Ohm loop resis-
tance:
For other configurations, see the chart under Loop
power on page 104
1) From sensor reference point.
2) See
Dimensions: on page 10.
3) Reference conditions: Response Rate (2.2.7.1.) set to FAST and LCD Fast Mode (4.3.) set to
ON

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 7
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Specifications
Influence of ambient temperature < 0.003%/K (average over full temperature range,
referenced to maximum range)
Dielectric constant of material measured
• Minimum dK = 1.6 (depending on antenna and application type)
Memory:
• non-volatile EEPROM
• no battery required.
Interface
Analog output
• signal range 4 to 20 mA (±0.02 mA accuracy)
upper limit 20 to 23 mA adjustable
• fail signal 3.6 mA to 23 mA; or last value
• load Max. 600 
Communication: HART
• Load 230 to 600 230 to 500 when connecting a
coupling module
• Max. Line Length multi-wire: 1500 m (4921 ft)
•Protocol HART
1), Version 5.1
Configuration Siemens SIMATIC PDM (PC), or
Siemens Milltronics infrared handheld programmer,
or HART handheld communicator
Display (local)2) graphic LCD, with bar graph representing level
Mechanical (Easy Aimer model)
Materials
• flange and horn 304 stainless steel
Process Connections:
• universal flanges3) 2"/50 mm, 3"/80 mm, 4"/100 mm, 6"/150 mm
Horn:
•2"horn
•3"horn
•4"horn
Enclosure
• construction aluminum, polyester powder-coated
• conduit entry 2 x M20x1.5, or 2 x ½" NPT
• ingress protection Type 4X/NEMA 4X, Type 6/NEMA 6, IP67, IP68
Dust cap (optional)
• 2" PTFE, pipe clamp connection, O.D. 50 mm (1.97")
• 3" PTFE, pipe clamp connection, O.D. 75 mm (2.95")
• 4" PTFE, pipe clamp connection, O.D. 100 mm (3.94")
1) HART® is a registered trademark of HART Communication Foundation.
2) Display quality will be degraded in temperatures below –25 °C (–13 °F) and above +65 °C (+149 °F).
3) Universal flange mates with EN 1092-1 (PN16)/ASME B16.5 (150 lb)/JIS 2220 (10K) bolt hole
pattern.

Page 8 SITRANS LR260 (HART) – INSTRUCTION MANUAL 7ML19985KE03
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Specifications
Air Purge Connection
• equipped with female 1/8" NPT fitting
Weight
• standard model < 8.14 kg (17.9 lb) including 4" flange and standard
Easy Aimer with 4" horn antenna
Mechanical (Threaded Connection model)
• threaded connection 2" NPT (ASME B1.20.1), R (BSPT, EN 10226-1) or
G (BSPP, EN ISO 228-1)
materials 316L /1.4404 or 316L /1.4435 stainless steel
PTFE emitter
Environmental
• location indoor/ outdoor
• altitude 2000 m (6562 ft) max.
• ambient temperature 40 to +80 °C (40 to +176 °F)
• relative humidity suitable for outdoor
Type 4X/NEMA 4X, Type 6/NEMA 6, IP67 enclosure
(see note below)
• installation category I
• pollution degree 4
Process
•temperature
1) -40 to 200 °C (-40 to 392 °F)2)
(at process connection with FKM O-ring)
• pressure (vessel)1Refer to
Process Pressure/Temperature derating
curves
on page 102.
Approvals
•General CSA
US/C, FM, CE, C-TICK
• Radio Europe (R&TTE), FCC, Industry Canada, C-TICK
• Hazardous ATEX II 1D, 1/2D, 2D Ex tD A20 IP67, IP68 T100 °C
ATEX II 1G Ex ia IIC T4 Ga
IECEx SIR 11.0153X Ex ia IIC T4 Ga Ex tD A20 IP67, IP68
Notes:
• Check Approvals on page 8, for the specific configuration you are about to use or
install.
• Use appropriate conduit seals to maintain IP or NEMA rating.
1) The maximum temperature is dependent on the ambient temperature and vessel pressure. For
more detail, or for other configurations, see
Process Pressure/Temperature derating curves on
page 102, and
Process Pressure/Temperature derating curves on page 102.
2) Pressure rated version for maximum process temperature of 80 °C (176 °F)
Note: The device nameplate lists the approvals that apply to your device.

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 9
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Specifications
T100 °C
FM/CSA Class I, Div. 1, Groups A, B, C, D, Class II, Div. 1,
Groups E, F, G, Class III T4
FM/CSA Class I, Div 2, Groups A, B, C, D T5
SABS ARP0108 Ex ia IIC T4 Ga
Programmer (infrared keypad)
Siemens Milltronics Infrared IS (Intrinsically Safe) Hand Programmer for hazardous and
all other locations (battery is non-replaceable)
• approval ATEX II 1 G, EEx ia IIC T4, cert. SIRA 01ATEX2147
FM/CSA: Class I, Div. 1, Groups A, B, C, D
• ambient temperature 20 to +40 °C (5 to +104 °F)
• interface proprietary infrared pulse signal
• power 3 V lithium battery
• weight 150 g (0.3 lb)
• color black
• Part Number 7ML1930-1BK

Page 10 SITRANS LR260 (HART) – INSTRUCTION MANUAL 7ML19985KE03
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Specifications
Dimensions:
Notes:
• Process temperature and pressure capabilities are dependent upon information on
the process device tag.
• Signal amplitude increases with horn diameter, so use the largest practical size.
enclosure/electronics
nameplate
universal slotted
flange
horn
sensor
reference
point
process device tag
268 mm
(10.6")
49 mm
(1.9")
74.5 mm
(2.9")
97.5 mm
(3.8")
2" horn
3" horn
4" horn
2" horn: 163 mm (6.4")
3" horn: 228 mm (9.0")
4" horn: 285 mm (11.2")
optional extension

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 11
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Specifications
Threaded Horn Antenna with extension
See table under Threaded Horn dimensions on page 12 for horn height to sensor
reference point.
Notes:
• Process temperature and pressure capabilities are dependent upon information on
the process connection tag.
• Signal amplitude increases with horn diameter, so use the largest practical size.
• Optional extensions can be installed below the threads.
threaded cover
enclosure/
electronics
196 mm
(7.7")
154 mm
(6.1")
167 mm
(6.6")
1/2" NPT cable entry
(or alternatively, M20 cable gland)
sensor
ref.
point
retaining
collar
90 mm
(3.5")
159 mm
(6.26")
50 mm
(2.0")
horn
28 mm (1.1")
optional
100 mm (4.0 ")
horn extension
process
connection
tag
horn
O.D.

Page 12 SITRANS LR260 (HART) – INSTRUCTION MANUAL 7ML19985KE03
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Specifications
Threaded Horn dimensions
Antenna
Type Antenna O.D. Height to sensor reference pointa)
a) Height from bottom of horn to sensor reference point as shown: see
Threaded
Horn Antenna with extension on page 11.
Beam
Angleb)
b) – 3dB in the direction of the polarization axis (see
Polarization reference point
on page 15 for an illustration).
Measurement
Range
1-1/2"
threaded
connection
2" threaded
connection
3" threaded
connection
2" Horn 47.8mm (1.88") N/A 166mm (6.55") 180mm (7.09") 15 degrees 20m (65.6 ft)
3" Horn 74.8mm (2.94") N/A 199mm (7.85") 213mm (8.39") 10 degrees 20m (65.6 ft)
4" Horn 94.8mm (3.73") N/A 254mm (10") 268mm (10.55") 8 degrees 20m (65.6 ft)

7ML19985KE03 SITRANS LR260 (HART) – INSTRUCTION MANUAL Page 13
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Installation
Installation
1)
WARNINGS:
• Installation shall only be performed by qualified personnel and in
accordance with local governing regulations.
• SITRANS LR260 is to be used only in the manner outlined in this manual,
otherwise protection provided by the device may be impaired.
• Never attempt to loosen, remove, or disassemble process connection
or instrument housing while vessel contents are under pressure.
• This product is designated as a Pressure Accessory per Directive
97/23/EC and is not intended for use as a safety device.
• 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.
• The user is responsible for the selection of bolting and gasket materials
which will fall within the limits of the flange and its intended use and
which are suitable for the service conditions.
• Improper installation may result in loss of process pressure.
Notes:
• For European Union and member countries, installation must be according to ETSI
EN 302372.
• Refer to the device nameplate for approval information.
• The Process Device Tag shall remain with the process pressure boundary
assembly1. In the event the instrument package is replaced, the Process Device Tag
shall be transferred to the replacement unit.
• SITRANS LR260 units are hydrostatically tested, meeting or exceeding the
requirements of the ASME Boiler and Pressure Vessel Code and the European
Pressure Equipment Directive.
• The serial numbers stamped in each process connection body provide a unique
identification number indicating date of manufacture.
Example: MMDDYY – XXX (where MM = month, DD = day, YY = year, and
XXX= sequential unit produced)
Further markings (space permitting) indicate flange configuration, size, equivalent
pressure class, material, and material heat code.
1) 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.

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Installation
Mounting location
Nozzle design
• The end of the horn must protrude
a minimum of 10 mm (0.4”) to avoid
false echoes being reflected from
the nozzle.
• Optional antenna extensions:
100 mm (3.93"), 200 mm (70.9"),
500 mm (19.69"), 1000 mm (39.4")1)
Nozzle location
• Keep emission cone free of
interference from ladders,
pipes, I-beams or filling
streams.
• Avoid central locations on
tall, narrow vessels.
• Align the antenna so that the
radar cone is perpendicular
to the surface of the
monitored material, if
possible. (See
Easy Aimer
on page 16.)
Notes:
• Correct location is key to a successful application.
• Avoid reflective interference from vessel walls and obstructions by following the
guidelines below.
1) Extensions are not recommended for applications where there may be excessive
visible vibration. Please consult factory for more information.
Notes:
• Beam angle depends on horn size:
see below.
• For details on avoiding false
echoes, see
Auto False Echo
Suppression on page 98.
Min. clearance:
10 mm (0.4")
beam angle:
2" horn = 15°
3" horn = 10°
4" horn = 8°
emission
cone
min. 1 m (39")