Siemens SITRANS LG270 Manuale utente
Operating Instructions • 01/2020
Guided Wave Radar
SITRANS LG270
Two-wire 4 … 20 mA/HART
Coax probe
-20 … +250 °C
2PBD-51041507
SITRANS LG270 - Operating Instructions
49916-EN-200212
3
PBD-51041507 SITRANS LG270 - Operating Instructions
49916-EN-20021249916-EN-200212
Contents
1 About this document ............................................................................................................... 5
1.1 Function ........................................................................................................................... 5
1.2 Target group ..................................................................................................................... 5
1.3 Symbols used................................................................................................................... 5
2 For your safety ......................................................................................................................... 6
2.1 Authorised personnel ....................................................................................................... 6
2.2 Appropriate use................................................................................................................ 6
2.3 Warning about incorrect use............................................................................................. 6
2.4 General safety instructions............................................................................................... 6
2.5 EU conformity................................................................................................................... 7
2.6 NAMUR recommendations .............................................................................................. 7
2.7 Installation and operation in the USA and Canada ........................................................... 7
3 Product description ................................................................................................................. 8
3.1 Conguration.................................................................................................................... 8
3.2 Principle of operation........................................................................................................ 9
3.3 Packaging, transport and storage................................................................................... 11
3.4 Accessories.................................................................................................................... 12
4 Mounting................................................................................................................................. 13
4.1 General instructions ....................................................................................................... 13
4.2 Mounting instructions ..................................................................................................... 14
5 Connecting to power supply................................................................................................. 18
5.1 Preparing the connection ............................................................................................... 18
5.2 Connecting..................................................................................................................... 19
5.3 Wiring plan, single chamber housing.............................................................................. 20
5.4 Wiring plan, double chamber housing ............................................................................ 21
5.5 Wiring plan, Ex-d-ia double chamber housing................................................................ 22
5.6 Supplementary electronics............................................................................................. 23
5.7 Switch-on phase............................................................................................................. 23
6 Set up with the display and adjustment module ................................................................ 24
6.1 Insert display and adjustment module............................................................................ 24
6.2 Adjustment system......................................................................................................... 25
6.3 Parameter adjustment - Quick setup .............................................................................. 26
6.4 Parameter adjustment - Extended adjustment................................................................ 26
6.5 Saving the parameterisation data................................................................................... 44
7 Setup with PACTware............................................................................................................. 45
7.1 Connect the PC.............................................................................................................. 45
7.2 Parameter adjustment with PACTware............................................................................ 46
7.3 Set up with the quick setup............................................................................................. 47
7.4 Saving the parameterisation data................................................................................... 48
8 Set up with other systems .................................................................................................... 49
8.1 DD adjustment programs ............................................................................................... 49
8.2 Field Communicator 375, 475 ........................................................................................ 49
9 Diagnostics and servicing .................................................................................................... 50
9.1 Maintenance .................................................................................................................. 50
9.2 Diagnosis memory ......................................................................................................... 50
4PBD-51041507
SITRANS LG270 - Operating Instructions
49916-EN-200212
9.3 Status messages............................................................................................................ 51
9.4 Rectify faults................................................................................................................... 54
9.5 Exchanging the electronics module................................................................................ 57
9.6 Software update ............................................................................................................. 58
9.7 How to proceed if a repair is necessary.......................................................................... 58
10 Dismount................................................................................................................................. 59
10.1 Dismounting steps.......................................................................................................... 59
10.2 Disposal ......................................................................................................................... 59
11 Supplement ............................................................................................................................ 60
11.1 Technical data ................................................................................................................ 60
11.2 Dimensions .................................................................................................................... 70
11.3 Trademark ...................................................................................................................... 73
Safety instructions for Ex areas
TakenoteoftheExspecicsafetyinstructionsforExapplications.
These instructions are attached as documents to each instrument
with Ex approval and are part of the operating instructions.
Editing status: 2020-01-24
5
PBD-51041507 SITRANS LG270 - Operating Instructions
49916-EN-200212
1 About this document
1.1 Function
This instruction provides all the information you need for mounting,
connection and setup as well as important instructions for mainte-
nance,faultrectication,theexchangeofpartsandthesafetyofthe
user. Please read this information before putting the instrument into
operation and keep this manual accessible in the immediate vicinity
of the device.
1.2 Target group
This operating instructions manual is directed to trained personnel.
Thecontentsofthismanualmustbemadeavailabletothequalied
personnel and implemented.
1.3 Symbols used
Information, note, tip: This symbol indicates helpful additional infor-
mation and tips for successful work.
Note: This symbol indicates notes to prevent failures, malfunctions,
damage to devices or plants.
Caution: Non-observance of the information marked with this symbol
may result in personal injury.
Warning: Non-observance of the information marked with this symbol
may result in serious or fatal personal injury.
Danger: Non-observance of the information marked with this symbol
results in serious or fatal personal injury.
Ex applications
This symbol indicates special instructions for Ex applications.
• List
The dot set in front indicates a list with no implied sequence.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.
6PBD-51041507
SITRANS LG270 - Operating Instructions
49916-EN-200212
2 For your safety
2.1 Authorised personnel
All operations described in this documentation must be carried out
onlybytrained,qualiedpersonnelauthorisedbytheplantoperator.
During work on and with the device, the required personal protective
equipment must always be worn.
2.2 Appropriate use
SITRANS LG270 is a sensor for continuous level measurement.
Youcannddetailedinformationabouttheareaofapplicationin
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
2.3 Warning about incorrect use
Inappropriate or incorrect use of this product can give rise to applica-
tion-specichazards,e.g.vesseloverllthroughincorrectmounting
or adjustment. Damage to property and persons or environmental
contamination can result. Also, the protective characteristics of the
instrument can be impaired.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and directives. The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsi-
ble for the trouble-free operation of the instrument. When measuring
aggressive or corrosive media that can cause a dangerous situation
if the instrument malfunctions, the operator has to implement suitable
measures to make sure the instrument is functioning properly.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new regula-
tions.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.Forsafety
reasons,onlytheaccessoryspeciedbythemanufacturermustbe
used.
To avoid any danger, the safety approval markings and safety tips on
the device must also be observed.
7
PBD-51041507 SITRANS LG270 - Operating Instructions
49916-EN-200212
2.5 EU conformity
ThedevicefullsthelegalrequirementsoftheapplicableEUdirec-
tives.ByaxingtheCEmarking,weconrmtheconformityofthe
instrument with these directives.
The EU conformity declaration can be found on our homepage.
Electromagnetic compatibility
Instruments in four-wire or Ex-d-ia version are designed for use in an
industrial environment. Nevertheless, electromagnetic interference
from electrical conductors and radiated emissions must be taken into
account, as is usual with class A instruments according to EN 61326-
1.Iftheinstrumentisusedinadierentenvironment,theelectromag-
netic compatibility to other instruments must be ensured by suitable
measures.
2.6 NAMUR recommendations
NAMUR is the automation technology user association in the process
industry in Germany. The published NAMUR recommendations are
acceptedasthestandardineldinstrumentation.
ThedevicefullstherequirementsofthefollowingNAMURrecom-
mendations:
• NE 21 – Electromagnetic compatibility of equipment
• NE 43 – Signal level for fault information from measuring transduc-
ers
• NE53–Compatibilityofelddevicesanddisplay/adjustment
components
• NE107–Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
2.7 Installation and operation in the USA and
Canada
This information is only valid for USA and Canada. Hence the follow-
ing text is only available in the English language.
Installations in the US shall comply with the relevant requirements of
theNationalElectricalCode(ANSI/NFPA70).
Installations in Canada shall comply with the relevant requirements of
the Canadian Electrical Code
A Class 2 power supply unit has to be used for the installation in the
USA and Canada.
8PBD-51041507
SITRANS LG270 - Operating Instructions
49916-EN-200212
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• Sensor SITRANS LG270
• Optional accessory
The further scope of delivery encompasses:
• Documentation
– Operating instructions SITRANS LG270
– Instructions for optional instrument features
– Ex-specic"Safety instructions"(withExversions)
– Ifnecessary,furthercerticates
Information:
Optional instrument features are also described in this operating
instructions manual. The respective scope of delivery results from the
orderspecication.
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.0
• Software from 1.3.0
• OnlyforinstrumentversionswithoutSILqualication
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
Scope of delivery
Scope of this operating
instructions
Type label
9
PBD-51041507 SITRANS LG270 - Operating Instructions
49916-EN-200212
2
1
5
3
6
4
7
8
11
12
13
14
10
9
1
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Process and ambient temperature
4 Process pressure
5 Signal output electronics
6 Voltage supply
7 Protection rating
8 Order number
9 Identicationcode
10 Serial number of the instrument
11 Symbol of the device protection class
12 Reminder to observe the instrument documentation
13 ID numbers, instrument documentation
14 Hardware and software version
3.2 Principle of operation
The SITRANS LG270 is a level sensor with coax probe for continuous
level or interface measurement, suitable for applications in liquids
withhightemperaturesupto250°C(482°F).
High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reected.Therunningtimeisevaluatedbytheinstrumentandoutput
as level.
Application area
Functional principle -
level measurement
10 PBD-51041507
SITRANS LG270 - Operating Instructions
49916-EN-200212
d
h
1
Fig. 2: Level measurement
1 Sensorreferenceplane(sealsurfaceoftheprocesstting)
d Distance to the level
h Height - Level
High frequency microwave impulses are guided along a steel cable or
rod. Upon reaching the product surface, a part of the microwave im-
pulsesisreected.Theotherpartpassesthroughtheupperproduct
andisreectedbytheinterface.Therunningtimestothetwoproduct
layers are processed by the instrument.
TS
d1
h1
h2
d2
1
L2
L1
L3
Fig. 3: Interface measurement
1 Sensorreferenceplane(sealsurfaceoftheprocesstting)
d1 Distance to the interface
d2 Distance to the level
TS Thickness of the upper medium (d1 - d2)
h1 Height - Interface
h2 Height - Level
L1 Lower medium
L2 Upper medium
L3 Gas phase
Functional principle - in-
terface measurement
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