Guided Wave Radar - Vision Solutions...to SIL3 (IEC 61508) the SITRANS LG250 is suitable for the use...

Operating Instructions • 03/2014

Guided Wave RadarSITRANS LG2504 … 20 mA/HART two-wire

Rod and cable probe

With SIL qualification

2 PBD-51041378SITRANS LG250 - Operating Instructions

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3PBD-51041378 SITRANS LG250 - Operating Instructions

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Contents1 About this document

1.1 Function ........................................................................................................................... 51.2 Target group ..................................................................................................................... 51.3 Symbols used................................................................................................................... 5

2 For your safety2.1 Authorised personnel ....................................................................................................... 62.2 Appropriate use ................................................................................................................ 62.3 Warning about incorrect use ............................................................................................. 62.4 General safety instructions ............................................................................................... 62.5 CE conformity ................................................................................................................... 62.6 SILqualificationaccordingtoIEC61508 .......................................................................... 72.7 NAMUR recommendations .............................................................................................. 72.8 Environmental instructions ............................................................................................... 7

3 Product description3.1 Configuration .................................................................................................................... 83.2 Principle of operation........................................................................................................ 93.3 Packaging, transport and storage ................................................................................... 113.4 Accessories and replacement parts ............................................................................... 12

4 Mounting4.1 General instructions ....................................................................................................... 144.2 Mounting instructions ..................................................................................................... 15

5 Connecting to power supply5.1 Preparing the connection ............................................................................................... 215.2 Connecting ..................................................................................................................... 225.3 Wiring plan, single chamber housing.............................................................................. 235.4 Wiring plan, double chamber housing ............................................................................ 245.5 Double chamber housing with DIS-ADAPT .................................................................... 255.6 Wiring plan, Ex-d-ia double chamber housing ................................................................ 265.7 Supplementary electronics ............................................................................................. 285.8 Switch-on phase............................................................................................................. 28

6 Functional safety (SIL)6.1 Objective ........................................................................................................................ 296.2 SILqualification .............................................................................................................. 296.3 Application area ............................................................................................................. 296.4 Safety concept of the parameterization .......................................................................... 306.5 Setup process ................................................................................................................ 31

7 Set up with the display and adjustment module7.1 Insert display and adjustment module ............................................................................ 347.2 Adjustment system ......................................................................................................... 357.3 Parameter adjustment .................................................................................................... 367.4 Saving the parameter adjustment data ........................................................................... 58

8 Setup with PACTware8.1 Connect the PC .............................................................................................................. 598.2 Parameter adjustment with PACTware ............................................................................ 608.3 Saving the parameter adjustment data ........................................................................... 61


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9 Set up with other systems9.1 DD adjustment programs ............................................................................................... 629.2 Field Communicator 375, 475 ........................................................................................ 62

10 Diagnostics and service10.1 Maintenance .................................................................................................................. 6310.2 Diagnosis memory ......................................................................................................... 6310.3 Status messages ............................................................................................................ 6410.4 Rectify faults ................................................................................................................... 6810.5 Exchanging the electronics module ................................................................................ 7110.6 Exchanging the cable/rod ............................................................................................... 7210.7 Software update ............................................................................................................. 7410.8 How to proceed if a repair is needed .............................................................................. 74

11 Dismounting11.1 Dismounting steps.......................................................................................................... 7511.2 Disposal ......................................................................................................................... 75

12 Supplement12.1 Technical data ................................................................................................................ 7612.2 Dimensions .................................................................................................................... 87

Safety instructions for Ex areasPleasenotetheEx-specificsafetyinformationforinstallationandop-eration in Ex areas. These safety instructions are part of the operating instructions manual and come with the Ex-approved instruments.Editing status: 2014-03-17


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1 About this document

1.1 FunctionThis operating instructions manual provides all the information you need for mounting, connection and setup as well as important instruc-tionsformaintenanceandfaultrectification.Pleasereadthisinforma-tion before putting the instrument into operation and keep this manual accessible in the immediate vicinity of the device.

1.2 Target groupThis operating instructions manual is directed to trained specialist personnel. The contents of this manual should be made available to these personnel and put into practice by them.

1.3 Symbols usedInformation, tip, noteThis symbol indicates helpful additional information.Caution: If this warning is ignored, faults or malfunctions can result.Warning: If this warning is ignored, injury to persons and/or serious damage to the instrument can result.Danger: If this warning is ignored, serious injury to persons and/or destruction of the instrument can result.

Ex applicationsThis symbol indicates special instructions for Ex applications.

• ListThe dot set in front indicates a list with no implied sequence.

→ ActionThis arrow indicates a single action.

1 Sequence of actionsNumbers set in front indicate successive steps in a procedure.

Battery disposalThis symbol indicates special information about the disposal of bat-teries and accumulators.


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2 For your safety

2.1 Authorised personnelAll operations described in this operating instructions manual must be carried out only by trained specialist personnel authorised by the plant operator.During work on and with the device the required personal protective equipment must always be worn.

2.2 Appropriate useSITRANS LG250 is a sensor for continuous level measurement.Youcanfinddetailedinformationabouttheareaofapplicationinchapter "Product description".Operational reliability is ensured only if the instrument is properly usedaccordingtothespecificationsintheoperatinginstructionsmanual as well as possible supplementary instructions.

2.3 Warning about incorrect useInappropriate or incorrect use of the instrument can give rise to application-specifichazards,e.g.vesseloverfillordamagetosystemcomponents through incorrect mounting or adjustment.

2.4 General safety instructionsThis is a state-of-the-art instrument complying with IEC 61508 and all prevailing regulations and guidelines. The instrument must only be operatedinatechnicallyflawlessandreliablecondition.Theoperatoris responsible for the trouble-free operation of the instrument.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 cor-responding Safety Manual, the national 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-traryconversionsormodificationsareexplicitlyforbidden.The safety approval markings and safety tips on the device must also be observed.

2.5 CE conformityThedevicefulfillsthelegalrequirementsoftheapplicableECguide-lines.ByaffixingtheCEmarking,weconfirmsuccessfultestingoftheproduct.


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YoucanfindtheCECertificateofConformityinthedownloadsectionof our homepage.

Electromagnetic compatibilityInstruments 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.Iftheinstrumentisusedinadifferentenvironment,theelectromag-netic compatibility to other instruments must be ensured by suitable measures.

2.6 SILqualificationaccordingtoIEC61508TheinstrumentmeetsthespecificationsofIEC61508:2010(Edi-tion2).Itisqualifiedforsingle-channeloperationuptoSIL2.Theinstrument can be used homogeneously redudant up to SIL3 in multi-channel architecture with HFT 1.

2.7 NAMUR recommendationsNAMUR is the automation technology user association in the process industry in Germany. The published NAMUR recommendations are acceptedasthestandardinfieldinstrumentation.ThedevicefulfillstherequirementsofthefollowingNAMURrecom-mendations:

• NE 21 – Electromagnetic compatibility of equipment• NE 43 – Signal level for malfunction information from measuring

transducers• NE53–Compatibilityoffielddevicesanddisplay/adjustment

components• NE107–Self-monitoringanddiagnosisoffielddevicesFor further information see www.namur.de.

2.8 Environmental instructionsProtection of the environment is one of our most important duties. That is why we have introduced an environment management system with the goal of continuously improving company environmental pro-tection.Theenvironmentmanagementsystemiscertifiedaccordingto DIN EN ISO 14001.Pleasehelpusfulfillthisobligationbyobservingtheenvironmentalinstructions in this manual:

• Chapter "Packaging, transport and storage"• Chapter "Disposal"


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3 Product description

3.1 ConfigurationThetypelabelcontainsthemostimportantdataforidentificationanduse of the instrument:

2

1

5

3

6

4

78

11

12

13

14

10

9

1

Fig. 1: Layout of the type label (example)1 Instrument type2 Product code3 Approvals4 Power supply and signal output, electronics5 Protection rating6 Probe length7 Process and ambient temperature, process pressure8 Material, wetted parts9 Hardware and software version10 Order number11 Serial number of the instrument12 Symbol of the device protection class13 ID numbers, instrument documentation14 Reminder to observe the instrument documentation15 NotifiedauthorityforCEmarking16 Approval directives17 Marking of the safety function in SIS

This operating instructions manual applies to the following instrument versions:

• Hardware from 1.0.0• Software from 1.0.0• DTM from version 1.67.2

The instrument and the electronics version can be determined via the product code on the type label as well as on the electronics.

• Standard electronics: Type FX80H.-SIL

The scope of delivery encompasses:

• Sensor• Documentation

– this operating instructions manual

Type label

Scope of this operating instructions manual

Versions

Scope of delivery


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– SafetyManual(SIL) – Testcertificatemeasuringaccuracy(optional) – Operating instructions manual "Display and adjustment mod-

ule"(optional) – Supplementary instructions "GSM/GPRS radio module" (optional)

– Supplementary instructions manual "Heating for display and adjustment module"(optional)

– Supplementary instructions manual "Plug connector for con-tinuously measuring sensors"(optional)

– Ex-specific"Safety instructions"(withExversions) – ifnecessary,furthercertificates

3.2 Principle of operationThe SITRANS LG250 is a level sensor with cable or rod probe for continuous level or interface measurement, suitable for applications in liquids.DuetothequalificationuptoSIL2orhomogeneousredundantuptoSIL3(IEC61508)theSITRANSLG250issuitablefortheuseinsafety-instrumentedsystems(SIS).Thesafetyfunction(SIF)canbeamonitoringofthemax.ormin.levelor a combination of both.

High frequency microwave pulses are guided along a steel cable or a rod. Upon reaching the product surface, the microwave pulses are reflected.Therunningtimeisevaluatedbytheinstrumentandoutput-ted as level.

d

h

1

Fig. 2: Level measurement1 Sensorreferenceplane(sealsurfaceoftheprocessfitting)d Distance to the interface (HART value 1)h Height - Level

Probe end trackingTo increase sensitivity, the probe is equipped with probe end tracking. In products with a low dielectric constant, this function is very helpful.

Application area

Functional principle - level measurement


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This is the case, for example, in plastic granules, packing chips or in vesselswithfluidizedproducts.Between a dielectric constant of 1.5 and 3, the function switches on, if required. As soon as the level echo can no longer be detected, probe end tracking is automatically activated. The measurement is contin-ued with the last calculated dielectric constant.The accuracy thus depends on the stability of the dielectric constant.If you measure a medium with a dielectric constant below 1.5, probe end tracking is always active. In this case, you have to enter the dielectric constant of the medium. A stable dielectric constant is very important here.

High frequency microwave impulses are guided along a steel cable or rod. Upon reaching the product surface, a part of the microwave im-pulsesisreflected.Theotherpartpassesthroughtheupperproductandisreflectedbytheinterface.Therunningtimestothetwoproductlayers are processed by the instrument.

TS

d1

h1h2

d21

L2

L1

L3

Fig. 3: Interface measurement1 Sensorreferenceplane(sealsurfaceoftheprocessfitting)d1 Distance to the interface (HART value 1)d2 Distance to the level (HART value 3)TS Thickness of the upper medium (d1 - d2)h1 Height - Interfaceh2 Height - LevelL1 Lower mediumL2 Upper mediumL3 Gas phase

Upper medium (L2)• The upper medium must not be conductive• The dielectric constant of the upper medium or the actual distance

totheinterfacemustbeknown(inputrequired).Min.dielectriccon-stant:1.6.Youcanfindalistofdielectricconstantsonourhomepage: www.siemens.com/sitranslg.

• The composition of the upper medium must be stable, no varying products or mixtures

Functional principle - in-terface measurement

Prerequisites for inter-face measurement


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• Theuppermediummustbehomogeneous,nostratificationswithin the medium

• Min.thicknessoftheuppermedium50mm(1.97in)• Clear separation from the lower medium, emulsion phase or detri-

tuslayermax.50mm(1.97in)• If possible, no foam on the surface

Lower medium (L1)• The dielectric constant must be 10 higher than the dielectric

constant of the upper medium, preferably electrically conductive. Example: upper medium dielectric constant 2, lower medium at least dielectric constant 12.

Gas phase (L3)• Air or gas mixture• Gas phase - dependent on the application, gas pahse does not

alwaysexist(d2=0)

The instrument is always preset to the application "Level measure-ment".For the interface measurement, you can select the requested output signal with the setup.

3.3 Packaging, transport and storageYour instrument was protected by packaging during transport. Its capacity to handle normal loads during transport is assured by a test based on ISO 4180.The packaging of standard instruments consists of environment-friendly, recyclable cardboard. For special versions, PE foam or PE foil is also used. Dispose of the packaging material via specialised recycling companies.

Transport must be carried out in due consideration of the notes on the transport packaging. Nonobservance of these instructions can cause damage to the device.

The delivery must be checked for completeness and possible transit damage immediately at receipt. Ascertained transit damage or con-cealed defects must be appropriately dealt with.

Up to the time of installation, the packages must be left closed and stored according to the orientation and storage markings on the outside.Unless otherwise indicated, the packages must be stored only under the following conditions:

• Not in the open• Dry and dust free• Not exposed to corrosive media• Protected against solar radiation• Avoiding mechanical shock and vibration

Output signal

Packaging

Transport

Transport inspection

Storage


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• Storage and transport temperature see chapter "Supplement - Technical data - Ambient conditions"

• Relative humidity 20 … 85 %

3.4 Accessories and replacement partsThe display and adjustment module LG Local Display Interface is used for measured value indication, adjustment and diagnosis. It can be inserted into the sensor and removed at any time.Youcanfindadditionalinformationintheoperatinginstructionsmanual "LG Local Display Interface"(Document-ID43838).

The LG Remote Interface is an external display and adjustment unit for sensors with single chamber housing and Ex-d double chamber housing.It is suitable for measured value indication and adjustment of sensors and is connected to the sensor with a four-wire standard cable up to 50m(164ft)long.Youcanfindadditionalinformationintheoperatinginstructionsmanual "LG Remote Interface".

The LG Remote Interface is suitable for measured value indication and adjustment of sensors with HART protocol. It is looped into the 4 … 20 mA/HART signal cable.Youcanfindadditionalinformationintheoperatinginstructionsmanual "LG Remote Interface".

The adapter "DIS-ADAPT" is an accessory part for sensors with dou-ble chamber housings. It enables the connection of the exterbal dis-play and adjustment unit to the sensor housing via an M12 x 1 plug.Youcanfindfurtherinformationinthesupplementaryinstructions"Adapter DISADAPT".

The electronics module SITRANS series LG is a replacement part for TDRsensorsofSITRANSseriesLG.Thereisadifferentversionavail-able for each type of signal output.Youcanfindfurtherinformationintheoperatinginstructionsmanual"ElectronicsmoduleSITRANSseriesLG".

If you are using an instrument with rod version, you can extend the rod probe individually with curved segments and rod extensions of differentlengths.Allextensionsusedmustnotexceedatotallengthof6m(19.7ft).The extensions are available in the following lengths:

Rod ø 12 mm (0.47 in)• Basicsegments:20…5900mm(0.79…232in)• Rodsegments:20…5900mm(0.79…232in)• Curvedsegments:100x100mm(3.94…3.94in)

Storage and transport temperature

Display and adjustment module

External display and adjustment unit

External display and ad-justment unit with HART protocol

DIS-ADAPT

Electronics module

Rod extension


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Youcanfindfurtherinformationintheoperatinginstructionsmanual"Rod extension SITRANS series LG".

If you mount the SITRANS LG250 in a bypass tube or standpipe, you have to avoid contact to the bypass tube by using a spacer at the probe end.Youcanfindadditionalinformationintheoperatinginstructionsmanual "Centering".

Spacer


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4 Mounting

4.1 General instructionsOninstrumentswithprocessfittingthread,thehexagonmustbetight-ened with a suitable screwdriver. Wrench size see chapter "Dimen-sions".

Warning:The housing must not be used to screw the instrument in! Applying tightening force can damage internal parts of the housing.

Protect your instrument against moisture penetration through the fol-lowing measures:

• Usetherecommendedcable(seechapter"Connectingtopowersupply")

• Tighten the cable gland• Turn the housing in such a way that the cable gland points down-

ward• Loop the connection cable downward in front of the cable gland

This applies particularly to:

• Outdoor mounting• Installationsinareaswherehighhumidityisexpected(e.g.through

cleaning processes)• Installations on cooled or heated vessels

In the case of instrument housings with self-sealing NPT threads, it is not possible to have the cable entries screwed in at the factory. The openings for the cable glands are therefore covered with red protec-tive caps as transport protection.Prior to setup you have to replace these protective caps with ap-proved cable glands or close the openings with suitable blind plugs.The suitable cable glands and blind plugs come with the instrument.

Make sure that all parts of the instrument exposed to the process are suitable for the existing process conditions.These are mainly:

• Active measuring component• Processfitting• Process seal

Process conditions are particularly:

• Process pressure• Process temperature• Chemical properties of the medium• AbrasionandmechanicalinfluencesYoucanfindthespecificationsoftheprocessconditionsinchapter"Technical data" as well as on the type label.

Screwing in

Protection against mois-ture

Protective caps

Suitability for the process conditions


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4.2 Mounting instructionsMount SITRANS LG250 in such a way that the distance to vessel installationsortothevesselwallisatleast300mm(12in).Innon-metallic vessels, the distance to the vessel wall should be at least 500mm(19.7in).During operation, the probe must not touch any installations or the vessel wall. If necessary, fasten the probe end.In vessels with conical bottom it can be advantageous to mount the sensor in the center of the vessel, as measurement is then possible nearly down to the lowest point of the bottom. Keep in mind that measurement all the way down to the tip of the probe may not be pos-sible.Theexactvalueofthemin.distance(lowerdeadband)isstatedin chapter "Technical data".

Fig. 4: Vessel with conical bottom

Plastic vessel/Glass vesselThe guided microwave principle requires a metallic surface on the processfitting.Therefore,inplasticvessels,etc.,useaninstru-mentversionwithflange(fromDN50)orplaceametalsheet(ø>200mm/8in)beneaththeprocessfittingwhenscrewingitin.Makesurethattheplatehasdirectcontactwiththeprocessfitting.When installing rod or cable probes in vessels without metal walls, e.g.inplasticvessels,themeasuredvaluecanbeinfluencedbystrongelectromagneticfields(emittedinterferenceaccordingtoEN 61326: class A). In this case, use a probe with coaxial version.

Installation position

Type of vessel


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1 2

Fig. 5: Installation in non-metallic vessel1 Flange2 Metal sheet

Ifpossible,avoidsockets.Mountthesensorflushwiththevesseltop.If this is not possible, use short sockets with small diameter.Higher sockets or sockets with a bigger diameter can generally be used.Theycan,however,increasetheupperblockingdistance(deadband). Check if this is relevant for your measurement.In such cases, always carry out a false signal suppression after instal-lation.Youcanfindfurtherinformationunder"Setup procedure".

hd

d hDN40 ... DN150

> DN150 ... DN200150100

_<_<

Fig. 6: Mounting socket

Whenweldingthesocket,makesurethatthesocketisflushwiththevessel top.

Socket


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Fig.7:Socketmustbeinstalledflush1 Unfavourable installation2 Socketflush-optimuminstallation

Before beginning the welding work, remove the electronics module from the sensor. By doing this, you avoid damage to the electronics through inductive coupling.

Donotmounttheinstrumentsinorabovethefillingstream.Makesurethatyoudetecttheproductsurface,nottheinflowingproduct.

Fig.8:Mountingofthesensorwithinflowingmedium

The reference plane for the measuring range of the sensors is the sealingsurfaceofthethreadorflange.Keep in mind that a min. distance must be maintained below the refer-ence plane and possibly also at the end of the probe - measurement intheseareasisnotpossible(deadband).Thelengthofthecablecan be used all the way to the end only when measuring conductive products.Theseblockingdistancesfordifferentmediumsarelisted

Welding work

Inflowingmedium

Measuring range


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in chapter "Technical data". Keep in mind for the adjustment that the default setting for the measuring range refers to water.

Theprocessfittingmustbesealedifthereisgaugeorlowpressureinthe vessel. Before use, check if the seal material is resistant against the measured product and the process temperature.Themax.permissiblepressureisspecifiedinchapter"Technical data" or on the type label of the sensor.

Standpipes or bypass tubes are normally metal tubes with a diameter of30…200mm(1.18…7.87in).Inmeasurementtechnology,sucha tube corresponds to a coax probe. It does not matter if the stand-pipe is perforated or slotted for better mixing. Lateral inlets in bypass tubesalsodonotinfluencethemeasurement.For bypass tubes, select the probe length such that the blocking distance(deadband)oftheprobeisaboveorbelowthelateralfillingopenings. You can thus measure the complete range of the medium in the bypass tube. When designing the bypass tube, keep the blocking distance of the probe in mind and select the length above the upper lateralfillingopeningaccordingly.Microwaves can penetrate many plastics. For process technical rea-sons, plastic standpipes are problematic. If durability is no problem, then we recommend the use of metal standpipes.When the SITRANS LG250 is used in standpipes or bypass tubes, contact with the tube wall must be avoided. We recommend for this purpose a cable probe with centering weight.With rod probes, a spacer is generally not required. However, if there is a risk of the rod probe being pressed against the tube wall by in-flowingmedium,youshouldmountaspacerattheprobeendtoavoidcontact with the tube wall. In the case of cable probes, the cable can be strained.Keep in mind that buildup can form on the spacers. Strong buildup caninfluencethemeasurement.

Pressure

Standpipes or bypass tubes


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1 2 3

Fig. 9: Position of the spacer or centering weight1 Rodprobewithspacer(PEEK)2 Cableprobewithcenteringweight3 Spacer(PEEK)onthegravityweightofacableprobe

Note:Measurement in a standpipe is not recommended for extremely adhesive products.

Instructions for the measurement:• The 100 % point should not be above the upper tube connection

to the vessel• The 0 % point should not be below the lower tube connection to

the vessel• A false signal suppression with installed sensor is generally rec-

ommended to achieve maximum possible accuracy.

If there is a risk of the cable probe touching the vessel wall during operation due to product movements or agitators, etc., the measuring probeshouldbesecurelyfixed.Thereisaninsidethread(M8)inthegravityweight,e.g.foraneye-bolt(optional).Make sure that the probe cable is not completely taut. Avoid tensile loads on the cable.Avoidundefinedvesselconnections,i.e.theconnectionmustbeeithergroundedreliablyorisolatedreliably.Anyundefinedchangeofthis requirement can lead to measurement errors.If there is a danger of the rod probe touching the vessel wall, then the probe must be fastened at the bottom end.Keep in mind that below the fastening, a measurement is not possible.

Fasten


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1

2

1

2

Fig. 10: Fasten the probe1 Measuring probe2 Retaining sleeve

Incaseofdifficultinstallationconditions,theprobecanbealsomounted laterally. For this purpose, adapt the rod with rod extensions or bow-shaped segments.Let the probe length determine automatically by the instrument to compensate the resulting running time changes.The determine probe length can deviate from the actual probe length when using bow-shaped segments.If installations such as struts, ladders, etc. exist on the vessel wall, then the probe should have a distance to the vessel wall of at least 300mm(11.81in).Youcanfindfurtherinformationinthesupplementaryinstructionsofthe rod extension.

Incaseofdifficultinstallationconditions,forexampleinasocket,theprobe can be adapted respectively with a rod extension.Let the probe length determine automatically by the instrument to compensate the resulting running time changes.Youcanfindfurtherinformationinthesupplementaryinstructionsofthe rod extension.

Lateral installation

Rod extension


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5 Connecting to power supply

5.1 Preparing the connectionAlways keep in mind the following safety instructions:

• Connect only in the complete absence of line voltage• If overvoltage surges are expected, overvoltage arresters should

be installed

Power supply and current signal are carried on the same two-wire cable.Theoperatingvoltagecandifferdependingontheinstrumentversion.Thedataforpowersupplyarespecifiedinchapter"Technical data".Provide a reliable separation between the supply circuit and the mains circuits according to DIN EN 61140 VDE 0140-1.Keepinmindthefollowingadditionalfactorsthatinfluencetheoperat-ing voltage:

• Lower output voltage of the power supply unit under nominal load (e.g.withasensorcurrentof20.5mAor22mAincaseoffault)

• Influenceofadditionalinstrumentsinthecircuit(seeloadvaluesinchapter "Technical data")

The instrument is connected with standard two-wire cable without screen. If electromagnetic interference is expected which is above the test values of EN 61326-1 for industrial areas, screened cable should be used.Use cable with round cross section for instruments with housing and cablegland.Toensurethesealeffectofthecablegland(IPprotectionrating),findoutwhichcableouterdiameterthecableglandissuitablefor.Useacableglandfittingthecablediameter.

With plastic housing, the NPT cable gland or the Conduit steel tube must be screwed without grease into the threaded insert.Max. torque for all housings see chapter "Technical data".

If screened cable is required, we recommend connecting the cable screen on both ends to ground potential. In the sensor, the screen must be connected directly to the internal ground terminal. The ground terminal on the outside of the housing must be connected to thegroundpotential(lowimpedance).With Ex systems, the grounding is carried out according to the instal-lation regulations.InelectroplatingandCCPsystems(cathodiccorrosionprotection)itmustbetakenintoaccountthatsignificantpotentialdifferencesexist.This can lead to unacceptably high shield currents if the cable shield is grounded at both ends.

Safety instructions

Voltage supply

Connection cable

Cable gland ½ NPT

Cable screening and grounding


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Information:Themetallicpartsoftheinstrument(processfitting,transmitter,con-centric tube, etc.) are conductively connected with the inner and outer ground terminal on the housing. This connection exists either directly via connecting metallic parts or, in case of instruments with external electronics, via the screen of the special connection cable.Youcanfindspecificationsonthepotentialconnectionsinsidetheinstrument in chapter "Technical data".

5.2 ConnectingThe voltage supply and signal output are connected via the spring-loaded terminals in the housing.Connection to the display and adjustment module or to the interface adapter is carried out via contact pins in the housing.

Information:The terminal block is pluggable and can be removed from the electronics. To do this, lift the terminal block with a small screwdriver and pull it out. When reinserting the terminal block, you should hear it snap in.

Proceed as follows:1. Unscrew the housing cover2. If a display and adjustment module is installed, remove it by turn-

ing it slightly to the left.3. Loosen compression nut of the cable entry gland4. Removeapprox.10cm(4in)ofthecablemantle,stripapprox.

1cm(0.4in)ofinsulationfromtheendsoftheindividualwires5. Insert the cable into the sensor through the cable entry

Fig.11:Connectionsteps5and6-Singlechamberhousing

Connection technology

Connection procedure


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Fig.12:Connectionsteps5and6-Doublechamberhousing

6. Insert the wire ends into the terminals according to the wiring plan

Information:Solidcoresaswellasflexiblecoreswithwireendsleevesareinsert-eddirectlyintotheterminalopenings.Incaseofflexiblecoreswithoutend sleeves, press the terminal from above with a small screwdriver, the terminal opening is then free. When the screwdriver is released, the terminal closes again.Youcanfindfurtherinformationonthemax.wirecross-sectionunder"Technicaldata/Electromechanicaldata"7. Check the hold of the wires in the terminals by lightly pulling on

them8. Connect the screen to the internal ground terminal, connect the

outer ground terminal to potential equalisation9. Tighten the compression nut of the cable entry gland. The seal

ring must completely encircle the cable10. Reinsert the display and adjustment module, if one was installed11. Screw the housing cover back onTheelectricalconnectionisfinished.

5.3 Wiring plan, single chamber housingThe following illustration applies to the non-Ex, Ex-ia and Ex-d ver-sion.


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51 2+( ) (-) 6 7 8

4...20mA

2

3

41

Fig.13:Electronicsandterminalcompartment,singlechamberhousing1 Voltage supply, signal output2 For display and adjustment module or interface adapter3 For external display and adjustment unit4 Ground terminal for connection of the cable screen

5.4 Wiring plan, double chamber housingThe following illustrations apply to the non-Ex as well as to the Ex-ia version.

5 6 7 8

4...20mA

1 2+( ) (-)

2

31

Fig.14:Electronicscompartment,doublechamberhousing1 Internal connection to the connection compartment2 For display and adjustment module or interface adapter

Electronics and terminal compartment

Electronics compartment


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51 2+( ) (-) 6 7 8

4...20mA Display

2

3

41

Fig. 15: Terminal compartment, double chamber housing1 Voltage supply, signal output2 For display and adjustment module or interface adapter3 For external display and adjustment unit4 Ground terminal for connection of the cable screen

Information:The use of an external display and adjustment unit and a display and adjustment module in parallel in the connection compartment is not supported.

5.5 Double chamber housing with DIS-ADAPT

3

1

2

Fig. 16: View to the electronics compartment with DISADAPT for connection of the external display and adjustment unit1 DIS-ADAPT2 Internal plug connection3 Plug connector M12 x 1

Terminal compartment



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34

1 2

Fig. 17: View to the plug connector M12 x 11 Pin 12 Pin 23 Pin 34 Pin 4

Contact pin Colour connection ca-ble in the sensor

Terminal, electronics module

Pin 1 Brown 5

Pin 2 White 6

Pin 3 Blue 7

Pin 4 Black 8

5.6 Wiring plan, Ex-d-ia double chamber housing

31

2

5 6 7 81 2( ) (-)+

4...20mA

Fig.18:Electronicscompartment,doublechamberhousing1 Internal connection to the connection compartment2 For display and adjustment module or interface adapter3 Internal connection to the plug connector for external display and adjust-

ment unit (optional)

Assignment of the plug connector



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4...20mA

1 2+( ) (-) 2

1

Fig.19:Connectioncompartment,doublechamberhousingExdia1 Voltage supply, signal output2 Ground terminal for connection of the cable screen

3

1

2

Fig. 20: View to the electronics compartment with DISADAPT for connection of the external display and adjustment unit1 DIS-ADAPT2 Internal plug connection3 Plug connector M12 x 1

34

1 2

Fig. 21: View to the plug connector M12 x 11 Pin 12 Pin 23 Pin 34 Pin 4



Pin 1 Brown 5

Terminal compartment


Assignment of the plug connector


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Pin 2 White 6

Pin 3 Blue 7

Pin 4 Black 8

5.7 Supplementary electronicsYou can use the supplementary electronics - additional current output to provided a second measured value.Both current outputs are passive and need a power supply.Theadditionalcurrentoutput(II)cannotbeusedinsafety-instrument-ed systems according to SIL.

1 2+( ) (-)

I4...20mA

I I4...20mA

7 8+( ) (-)

31 2

Fig.22:Connectioncompartmentdoublechamberhousing,supplementaryelectronics - additional current output1 First current output (I) - Voltage supply and signal output (HART)2 Second current output (II) - Voltage supply and signal output (without HART)3 Ground terminal for connection of the cable screen

5.8 Switch-on phaseAfter connecting the instrument to power supply or after a voltage recurrence, the instrument carries out a self-check for approx. 30 s:

• Internal check of the electronics• Indication of the instrument type, hardware and software version,

measurement loop name on the display or PC• Indication of the status message "F 105 Determine measured

value" on the display or PC• The output signal jumps to the set fault current

As soon as a plausible measured value is found, the corresponding current is outputted to the signal cable. The value corresponds to the actual level as well as the settings already carried out, e.g. factory setting.

Supplementary electron-ics - Additional current output


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6 Functional safety (SIL)

6.1 ObjectiveIn case of dangerous failures, processing facilities and machines can cause risks for persons, environment and property. The risk of such failures must be judged by the plant operator. Dependent thereon are measures for risk reduction through error prevention, error detection and fault control.The part of plant safety depending on the correct functioning of safety-related components for risk reduction is called functional safety.Componentsusedinsuchsafety-instrumentedsystems(SIS)mustthereforeexecutetheirintendedfunction(safetyfunction)withadefinedhighprobability.The safety requirements for such components are described in the internationalstandardsIEC61508and61511(IEC61062-Ma-chines), which set the standard for uniform and comparable judge-ment of instrument and plant or machine safety and hence contribute to worldwide legal certainty. Depending on the degree of required risk reduction, we distinguish between four safety levels, from SIL1 for low risktoSIL4forveryhighrisk(SIL=SafetyIntegrityLevel).

6.2 SILqualificationWhen developing instruments which can be used in safety-instru-mented systems, the focus is on avoiding systematical as well as determining and controlling random errors.Here the most important characteristics and requirements from the perspectiveoffunctionalsafetyaccordingtoIEC61508(Edition2):

• Internal monitoring of safety-relevant circuit parts• Extended standardization of the software development• In case of failure, switching of the safety-relevant outputs to a

definedsafestate• Determinationofthefailureprobabilityofthedefinedsafetyfunc-

tion• Reliable parameterization with non-safe user environment• Proof test

TheSILqualificationofcomponentsisspecifiedinamanualforfunc-tionalsafety(SafetyManual).Here,youcanfindallsafety-relevantcharacteristics and information required by the user and planner for planning and operating the safety-relevant system. This document is attached to each instrument with SIL rating and can be also retrieved via the serial number search on our homepage.

6.3 Application areaThe instrument can be used for point level detection or level measure-mentofliquidsandbulksolidsinsafety-instrumentedsystems(SIS)according to IEC 61508, IEC 61511 and IEC 61062. Take note of the specificationsintheSafetyManual.The following inputs/outputs are permitted:

Additional characteristics and requirements


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• 4 … 20 mA current output

6.4 Safety concept of the parameterizationThe following tools are permitted for parameterization of the safety function:

• The integrated display and adjustment unit for on-site adjustment• The DTM suitable for the signal conditioning instrument in con-

junction with an adjustment software according to the FDT/DTM standard, e. g. PACTware

Note:For operation of the SITRANS LG250 the DTM Collection version 1.67.2orhigherisrequired.Themodificationofsafety-relevantparameters is only possible with active connection to the instrument (onlinemode).

To avoid possible errors during parameterization in a non-safe user environment,averificationprocedureisusedthatmakesitpossibleto detect parameterization errors reliably. For this, safety-relevant pa-rametersmustbeverifiedaftertheyarestoredinthedevice.Innormaloperating condition, the instrument is also locked against parameter changes through unauthorized access. This concept applies to the adjustment on the instrument but also to adjustment with PACTware with DTM.

For protection against unwanted or unauthorzed adjustment, the set parameters must be barred from unauthorized access. For this rea-son, the instrument is shipped in locked condition. The PIN in delivery status is "0000".Whenshippedwithaspecificparameteradjustment,theinstrumentsare accompanied by a list with the values deviating from the basic setting.Allsafety-relevantparametersmustbeverifiedafterachange.The parameter settings of the measurement loop must be document-ed.Youcanfindalistofallsafety-relevantparamtersintheshippingstatus in chapter "Setup with the display and adjustment module" under "Additional settings - Reset". In addition, a list of the safety-relevant parameters can be stored and printed via PACTware/DTM.

For each parameter change, the instrument must be unlocked via a PIN(seechapter"Setup steps - Lock adjustment"). The device status is indicated by the symbol of an unlocked or locked padlock.In delivery status, the PIN is 0000.

Warning:If adjustment is enabled, the safety function must be considered as unreliable. This applies until the parameterization is terminated correctly. If necessary, other measures must be taken to maintain the safety function.

Tool for operation and parameterization

Safety parameterization

Safety-relevant param-eters

Release adjustment

Unsafe device status


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All parameters changed by the operator are automatically stored temporarilysothattheycanbeverifiedinthenextstep.

Aftersetup,themodifiedparametersmustbeverified(confirmthecorrectnessoftheparameters).Todothis,youfirsthavetoenterthePIN. Here the adjustment is locked automatically. Then you carry outacomparisonoftwocharacterstrings.Youmustconfirmthatthecharacter strings are identical. This is used to check the character presentation.Thenyouconfirmthattheserialnumberofyourinstrumenthasbeencarried over correctly. This is used to check device communication.Then,allmodifiedparametersthathavetobeconfirmedarelisted.After this process is terminated, the safety function is again ensured.

Warning:If the described process was not carried out completely or correctly (e.g.interruptionorvoltageloss),theinstrumentremainsinthereleased and hence unsafe status.

Warning:In case of a reset to basic settings, all safety-relevant parameters will also be reset to default. Therefore all safety-relevant parameters must be checked or readjusted.

6.5 Setup processOperating sequenceAparameterchangewithSILqualifiedinstrumentsmustalwaysbecarried out as follows.

• Release adjustment• Change parameter• Lockadjustmentandverifymodifiedparameters

Thesetupmustbecarriedoutaccordingtoanexactlyspecifiedpat-tern.Generally the instrument is in safe operating state before the adjust-ment is released.

Each parameter change requires the release of the instrument throughaPIN(seechapter"Setup steps - Lock adjustment").In delivery status, the PIN is 0000.

SetuptheSITRANSLG250accordingtothespecificationinthisoperating instructions and the Safety Manual.

When locking the adjustment, the instrument checks the data of the measurement loop and decides on the basis of the evaluation results if a function test is required.

Function test not requiredIf the parameter check was successful, the adjustment is locked auto-matically and the instrument is again in safe operating state.

Change parameter

Verify parameters/Lock adjustment

Incomplete process

Instrument reset

Start: Safe operating state

Release adjustment

Change parameter

Setup - Function test


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Setupisthenfinished.

Function test requiredShould a function test be necessary, the following message is displayed on the display and adjustment module. The adjustment software also signals that a function test is required.

If a function test is required, the switching point or the range must be controlled with the original medium. For this purpose, you have to decide for your application which condition is potentially critical.

During a function test, you have to test the safety function of the instrument in the vessel with the original medium.Forthispurpose,youshouldknowthefillingheightofthevesselaswell as the min. and max. levels respectively for 4 and 20 mA. You then can calculate the respective output current.Measure the output current of SITRANS LG250 with a suitable multi-meter and compare the measured output current with the calculated output current.If you have to interrupt the function, you can leave the SITRANS LG250 in the respective situation.As long as SITRANS LG250 is powered, the display and adjustment module remains in the currently set adjustment menu.To interrupt the function test, you have to push the button "ESC".If you carry out the function test by means of the "PACTware" soft-ware, you can store the previously performed tests and continue from there later on.If you click to "Complete", the adjustment of the instrument is locked, butnotyetverified.Afterconclusionofthefunctiontest,youhavetorestart the adjustment.If a function test is necessary, please proceed as follows:

Modeoverfillprotection/dryrunprotectionSelecttherespectivesafetyfunction(overfillprotection/dryrunpro-tection) for your application.1. Raise the level to directly below the switching point

Keep a holding time of 1 minute for each level before you com-pare the measured value.

2. Lower the level to directly above the switching pointKeep a holding time of 1 minute for each level before you com-pare the measured value.

ResultIn both cases the output current must correspond to the respective level.

Function test


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Measure the current output and compare the value with the calcu-lated current value.You have to determine the permissible deviation of the values yourself. This deviation depends on the the accuracy requirements of your measurement loop. Determine the permissible tolerance for the deviation.

Mode "Range monitoring"If both levels are important for the safety function, you have to pro-ceed according to the mode "Range monitoring".1. Move the level to at least three points within the range limits.

Keep a holding time of 1 minute for each level before you com-pare the measured value.

2. Move the level to a point directly above and directly below the range limits.Keep a holding time of 1 minute for each level before you com-pare the measured value.

ResultIn all cases the output current must correspond to the respective level.For this purpose, you have to measure for all levels the current output and compare the values with the calculated current values.You have to determine the permissible deviation of the values yourself. This deviation depends on the the accuracy requirements of your measurement loop. Determine the permissible tolerance for the deviation.

Aftersetup,themodifiedparametersmustbeverified.Todothis,youfirsthavetoenterthecurrentPIN.Theadjustmentisthenlockedau-tomatically. Then you carry out a comparison of two character strings. Youmustconfirmthatthecharacterstringsareidentical.Thisisusedto check the character presentation.Thenyouconfirmthattheserialnumberofyourinstrumenthasbeencarried over correctly. This is used to check device communication.Then,allmodifiedparametersthathavetobeconfirmedarelisted.After this process is terminated, the safety function is again ensured.

Verify parameters/Lock adjustment


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7 Set up with the display and adjustment module

7.1 Insert display and adjustment moduleThe display and adjustment module can be inserted into the sensor andremovedagainatanytime.Youcanchooseanyoneoffourdiffer-ent positions - each displaced by 90°. It is not necessary to interrupt the power supply.Proceed as follows:1. Unscrew the housing cover2. Place the display and adjustment module in the requested posi-

tion onto the electronics and turn to the right until it snaps in3. Screw housing cover with inspection window tightly back onRemoval is carried out in reverse order.The display and adjustment module is powered by the sensor, an ad-ditional connection is not necessary.

Fig. 23: Installing the display and adjustment module in the electronics compart-ment of the single chamber housing


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1 2

Fig. 24: Insertion of the display and adjustment module into the double chamber housing1 In the electronics compartment2 Intheconnectioncompartment(withEx-d-iaversionnotpossible)

Note:Ifyouintendtoretrofittheinstrumentwithadisplayandadjustmentmodule for continuous measured value indication, a higher cover with an inspection glass is required.

7.2 Adjustment system

1

2

Fig. 25: Display and adjustment elements1 LCdisplay2 Adjustment keys

• [OK] key: – Move to the menu overview

Key functions


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– Confirmselectedmenu – Edit parameter – Save value

• [->] key: – Presentation, change measured value – Select list entry – Select editing position

• [+] key: – Change value of the parameter

• [ESC] key: – Interrupt input – Jump to next higher menu

The sensor is adjusted via the four keys of the display and adjust-ment module. The LC display indicates the individual menu items. The functions of the individual keys are shown in the above illustration. Approx. 10 minutes after the last pressing of a key, an automatic reset tomeasuredvalueindicationistriggered.Anyvaluesnotconfirmedwith [OK] will not be saved.

After switching on, the SITRANS LG250 carries out a short self-test where the device software is checked.The output signal transmits a fault signal during the switch-on phase.The following information is displayed on the display and adjustment module during the startup procedure:

• Instrument type• Device name• Softwareversion(SW-Ver)• Hardwareversion(HW-Ver)

With the [->]keyyoucanmovebetweenthreedifferentindicationmodes.Inthefirstview,theselectedmeasuredvalueisdisplayedinlargedigits.In the second view, the selected measured value and a correspond-ing bar graph presentation are displayed.In the third view, the selected measured value as well as a second selectable value, e.g. the temperature, are displayed.

7.3 Parameter adjustmentThemainmenuisdividedintofivesectionswiththefollowingfunc-tions:

Adjustment system

Switch-on phase

Measured value indica-tion

Main menu


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Setup: Settings, e.g. measurement loop name, medium, vessel, adjustment, signal output, device unit, false signal suppression, linearization curveDisplay: Settings, e.g., for language, measured value display, lightingDiagnosis: Information, e.g. on instrument status, pointer, measure-ment reliability, simulation, echo curveAdditional adjustments: Reset, date/time, reset, copy functionInfo: Instrument name, hardware and software version, date of manu-facture, instrument features

Note:For optimum adjustment of the measuring point, the individual sub-menu items in the main menu item "Setup" should be selected one after the other and provided with the correct parameters. If possible, go through the items in the given sequence.The procedure is described below.The following submenu points are available:

The submenu points described below.

Operating sequenceAparameterchangewithSILqualifiedinstrumentsmustalwaysbecarried out as follows.

• Release adjustment• Change parameter• LockadjustmentandverifymodifiedparametersThisensuresthatallmodifiedparameterswereconsciouslychanged.

Release adjustmentThe instrument is shipped in locked condition.As a protection against unintentional or unauthorized adjustment, the instrument is locked against all parameter changes in normal operat-ing condition.For each parameter change you have to enter the PIN of the instru-ment. In delivery status, the PIN is "0000".

If adjustment is enabled, the safety function must be considered as unreliable. This applies until the parameterization is terminated


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correctly. If necessary, other measures must be taken to maintain the safety function.

Here you can assign a suitable measurement loop name. Push the "OK" key to start the processing. With the "+" key you change the sign and with the "->"keyyoujumptothenextposition.You can enter names with max. 19 characters. The character set comprises:

• Capital letters from A … Z• Numbers from 0 … 9• Special characters + - / _ blanks

In this menu item you select the distance unit and the temperature unit.

With the distance units you can choose between m, mm and ft and with the temperature units betwenn °C, °F and K.

In this menu item you can enter the probe length or have the length determined automatically by the sensor system.When choosing "Yes", then the probe length will be determined automatically. When choosing "No", you can enter the probe length manually.

In this menu item you can select which type of medium you want to measure. You can choose between liquid or bulk solid.

In this menu item, you can select the application. You can choose between level measurement and interface measurement. You can also choose between measurement in a vessel or in a bypass or standpipe.

Setup - Measurement loop name

Setup - Units

Setup - Probe length

Setup - Application - Type of medium

Setup - Application - Ap-plication


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Note:Theselectionoftheapplicationhasaconsiderableinfluenceonallother menu items. Keep in mind that as you continue with the param-eter adjustment, individual menu items are only optionally available.You have the option of choosing the demonstration mode. In this mode, the sensor ignores the parameters of the application and reacts immediately to any change.This mode is only suitable for test and demonstration purposes and mustnotbeusedinasafety-instrumentedapplication(SIL).

Inthismenuitem,youcandefinethetypeofmedium(product).This menu item is only available if you have selected level measure-ment under the menu item "Application".

You can choose between the following medium types:

Dielectric con-stant

Type of medium Examples

>10 Water-based liq-uids

Acids, alcalis, water

3 … 10 Chemical mix-tures

Chlorobenzene, nitro lacquer, aniline, isocyanate, chloroform

< 3 Hydrocarbons Solvents, oils, liquid gas

This menu item is only available, if you have chosen interface meas-urement under the menu item "Application". In this menu item you can enter if there is a superimposed gas phase in your application.Only set the function to "Yes", if the gas phase is permanently pre-sent.

This menu item is only available if you have selected interface meas-urement under the menu item "Application". In this menu item you can choose the type of medium of the upper medium.

Setup - Application - Me-dium, dielectric constant

Setup - Application - Gas phase

Setup - Application - Di-electric constant


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You can enter the dielectric constant of the upper medium directly or have the value determined by the instrument. To do this you have to enter the measured or known distance to the interface.

In this menu item you can enter the max. adjustment for the level. With interface measurement this is the maximum total level.

Adjust the requested percentage value with [+] and store with [OK].

Entertheappropriatedistancevalueinm(correspondingtothepercentage value) for the full vessel. The distance refers to the sensor referenceplane(sealsurfaceoftheprocessfitting).Keepinmindthatthe max. level must lie below the dead band.

In this menu item you can enter the min. adjustment for the level. With interface measurement this is the minimum total level.

Adjust the requested percentage value with [+] and store with [OK].

Enterthesuitabledistancevalueinmfortheemptyvessel(e.g.distancefromtheflangetotheprobeend)correspondingtotheper-centagevalue.Thedistancereferstothesensorreferenceplane(sealsurfaceoftheprocessfitting).

Setup - Max. adjustment Level

Setup - Min. adjustment Level


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This menu item is only available if you have selected interface meas-urement under the menu item "Application".

You can accept the adjustment of the level measurement also for the interface measurement. If you select "Yes", the current setting will be displayed.

If you have selected "No", you can enter the adjustment for the inter-face separately. Enter the requested percentage value.

For the full vessel, enter the distance value in m matching the per-centage value.

This menu item is only available if you have selected interface meas-urement under the menu item "Application". If you have selected "Yes" inthepreviousmenuitem(acceptadjustmentofthelevelmeasure-ment), the current setting will be displayed.

If you have selected "No", you can enter the adjustment for the inter-face measurement separately.

Enter the respective distance value in m for the empty vessel cor-responding to the percentage value.

Todampprocess-dependentmeasuredvaluefluctuations,setanintegration time of 0 … 999 s in this menu item.If you have selected interface measurement under the menu item "Application", you can adjust the damping for the level and the inter-face separately.

Setup - Max. adjustment - Interface

Setup - Min. adjustment - Interface

Setup - Damping


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The default setting is a damping of 0 s.

A linearization is necessary for all vessels in which the vessel volume does not increase linearly with the level - e.g. a horizontal cylindri-cal or spherical tank, when the indication or output of the volume is required. Corresponding linearization curves are preprogrammed for these vessels. They represent the correlation between the level percentage and vessel volume.The linearization applies to the measured value indication and the current output. By activating the appropriate curve, the volume per-centage of the vessel is displayed correctly. If the volume should not be displayed in percent but e.g. in l or kg, a scaling can be also set in the menu item "Display".

Warning:If a linearization curve is selected, the measuring signal is no longer necessarilylineartothefillingheight.Thismustbeconsideredbytheuser especially when adjusting the switching point on the limit signal transmitter.In the following, you have to enter the values for your vessel, for example the vessel height and the socket correction.For non-linear vessel forms, enter the vessel height und the socket correction.For the vessel height, you have to enter the total height of the vessel.For the socket correction you have to enter the height of the socket above the upper edge of the vessel. If the socket is lower than the up-per edge of the vessel, this value can also be negative.

Setup - Linearization


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+ h

D

- h

Fig. 26: Vessel height und socket correction valueD Vessel height+h Positive socket correction value-h Negative socket correction value

Since scaling is very extensive, scaling of the level value was divided into two menu items.

In menu item "Level 1"youdefinethescalingvariableandthescalingunit for the level value on the display, e.g. volume in l.

Setup - Scaling Level

Setup - Scaling Level 1


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Since scaling is very extensive, scaling of the level value was divided into two menu items.

In menu item "Level 2"youdefinethescalingformatonthedisplayand the scaling of the measured level value for 0 % and 100 %.

Since scaling is very extensive, scaling of the interface value was divided into two menu items.

In menu item "Interface 1"youdefinethescalingsizeandthescalingunit for the interface value on the display, e.g. volume in l.You can accept the scaling of the level measurement also for the interface measurement. If you select "Yes", the current setting is displayed.

If you have selected "No", you can enter the scaling for the interface separately.

In menu item "Interface (2)"youdefinethescalingformatonthedisplay and the scaling of the interface measured value for 0 % and 100 %.

In menu item"Currentoutput,size" you determine which measured value the current output refers to.

Setup - Scaling Level 2

Setup - Scaling Interface

Setup - Scaling Interface (1)

Setup - Scaling Interface (2)

Setup - Current output Size


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In the menu item "Currentoutputmode" you determine the output characteristics and reaction of the current output in case of failure.

The default setting is output characteristics 4 … 20 mA, failure mode < 3.6 mA.

In the menu item "CurrentoutputMin./Max.", you determine the reac-tion of the current output during operation.

The default setting is min. current 3.8 mA and max. current 20.5 mA.

If a supplementary electronics with an additional current output is implemented in the instrument, then you can adjust the additional current output separately. In menu item"Currentoutput2" you specify which measured value the additional current output refers to.The additional current output cannot be used as an output in the senseofasafety-instrumentedapplication(SIL).The procedure corresponds to the previous settings of the standard current output. See "Setup-Currentoutput".

Since the HART variables are very extensive, the indication was divided into two menu items.

Setup - Current output mode

Setup - Current output Min./Max.

Setup - Current output 2

Setup - HART variables (1)


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In the menu "HART variables 1"youcanhavethefirstHARTvaluePV(primaryvalue)andthesecondHARTvalueSV(secondaryvalue)ofthe sensor displayed.The values cannot be changed in the display and adjustment module. To change these values, you have to use the adjustment software PACTware.HART functions are not relevant for SIL applications.

In the menu "HART variables 2" you can have the third HART value TV(thirdvalue)andthefourthHARTvalueQV(quartervalue)ofthesensor displayed.The values cannot be changed in the display and adjustment module. To change these values, you have to use the adjustment software PACTware.HART functions are not relevant for SIL applications.

Thefollowingcircumstancescauseinterferingreflectionsandcaninfluencethemeasurement:

• High sockets• Vessel installations such as struts

Note:A false signal suppression detects, marks and saves these false signals so that they are no longer taken into account for the level and interface measurement. We generally recommend carrying out a false signal suppression to achieve the best possible accuracy. This should be done with the lowest possible level so that all potential interfering reflectionscanbedetected.Proceed as follows:

Enter the actual distance from the sensor to the product surface.

All interfering signals in this section are detected by the sensor and stored.

Setup - HART variables (2)

Setup - False signal sup-pression


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Note:Check the distance to the product surface, because if an incorrect (toolarge)valueisentered,theexistinglevelwillbesavedasafalseecho.Thefillinglevelwouldthennolongerbedetectableinthisarea.If a false signal suppression has already been created in the sensor, the following menu window appears when selecting "False signal suppression":

The instrument carries out an automatic false signal suppression as soon as the probe is uncovered. The false signal suppression is always updated.The menu item "Delete" is used to completely delete an already cre-ated false signal suppression. This is useful if the saved false signal suppression no longer matches the metrological conditions in the vessel.

With this menu item you safeguard the sensor parameters against unauthorizedorunintentionalmodifications.To avoid possible errors during parameterization in a non-safe user environment,averificationprocedureisusedthatmakesitpossibleto detect parameterization errors reliably. For this, safety-relevant parametersmustbeverifiedbeforetheyarestoredinthedevice.Innormal operating condition, the instrument is also locked against parameter changes through unauthorized access.For this reason, the instrument is shipped in locked conditon. The PIN in the delivery status is "0000".

Character string comparison and serial numberYoufirsthavetocarryoutthecharacterstringcomparison.Thisisused to check the character respresentation.Confirmifthetwocharacterstringsareidentical.Theverificationtextsare provided in German and with all other menu languages in English.Afterwardsyouconfirmthattheserialnumberofyourinstrumentwascarried over correctly. This is used to check device communication.

In the next step, the instrument checks the data of the measurement and decides by means of the evaluation results if a functions test is required. If a function test is necessary, the following message is displayed.

Release setup - adjust-ment


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In this case, you have to carry out a function test.

Function testDuring a function test, you have to test the safety function of the instrument in the vessel with the original medium.Youcanfindthedetailedsequenceofthefunctiontestinchapter"Functional safety (SIL)"Forthispurpose,youshouldknowthefillingheightofthevesselaswell as the min. and max. levels respectively for 4 and 20 mA. You then can calculate the respective output current.Measure the output current of SITRANS LG250 with a suitable multi-meter and compare the measured output current with the calculated output current.You have to determine the permissible deviation of the values yourself. This deviation depends on the the accuracy requirements of your measurement loop. Determine the permissible tolerance for the deviation.If you have to interrupt the function, you can leave the SITRANS LG250 in the respective situation.As long as SITRANS LG250 is powered, the display and adjustment module remains in the currently set adjustment menu.To interrupt the function test, you have to push the button "ESC".If you carry out the function test by means of the "PACTware" soft-ware, you can store the previously performed tests and continue from there later on.

Verify parameterAllsafety-relevantparametersmustbeverifiedafterachange.Afterthefunctiontest,allmodified,safety-relevantparameterswillbelisted.Confirmthemodifiedvaluesoneaftertheother.

If the described process of parameter adjustment was run through completely and correctly, the instrument will be locked and hence ready for operation.

Otherwise the instrument remains in the released and hence unsafe condition.If you have to interrupt the function test, you can leave the display and adjustment module of SITRANS LG250 in its current state.


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As long as SITRANS LG250 is powered, the display and adjustment module remains in the currently set adjustment menu.To interrupt the function test, you have to push the button "ESC".If you carry out the function test by means of the "PACTware" soft-ware, you can store the previously performed tests and continue from there later on.

In the main menu point "Display", the individual submenu points should be selected subsequently and provided with the correct parameters to ensure the optimum adjustment of the display options. The procedure is described in the following.The following submenu points are available:

The submenu points described below.

This menu item enables the setting of the requested national lan-guage.

In the delivery status, the sensor is set to the ordered national lan-guage.

Inthismenuitem,youdefinetheindicationofthemeasuredvalueonthedisplay.Youcandisplaytwodifferentmeasuredvalues.Inthismenuitem,youdefinemeasuredvalue1.

The default setting for the displayed value 1 is "Filling height Level".

Inthismenuitem,youdefinetheindicationofthemeasuredvalueonthedisplay.Youcandisplaytwodifferentmeasuredvalues.Inthismenuitem,youdefinemeasuredvalue2.

The default setting for the displayed value 2 is the electronics tem-perature.

Display

Display - Menu language

Display - Displayed value 1

Display - Displayed value 2


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The optionally integrated background lighting can be adjusted via the adjustment menu. The function depends on the height of the supply voltage, see "Technical data".

Thelightingisswitchedoffindeliverystatus.

In this menu item, the device status is displayed.

The respective min. and max. measured value is saved in the sen-sor. The two values are displayed in the menu item "Peak values, distance".If you have selected interface measurement under the menu item "Setup - Application", the peak values of the interface measurement are displayed in addition to the peak values of the level measurement.

In another window you can carry out a reset of the two peak values separately.

The respective min. and max. measured values are saved in the sensor. The two values are displayed in the menu item "Peak values, measurement certainty".Themeasurementcanbeinfluencedbytheprocessconditions.Inthis menu item, the measurement certainty of the level measurement is displayed as percentage value. The higher the value, the more reli-ablethemeasurement.Values>90%indicatereliablemeasurement.If you have selected interface measurement under the menu item "Setup - Application", the peak values of the interface measurement are displayed in addition to the peak values of the level measurement.


Display - Backlight

Diagnostics - Device status

Diagnostics - Peak values Distance

Diagnostics - Peak values Measurement certainty


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The respective min. and max. measured values are saved in the sensor. The values are displayed in the menu item "Peak values Ad-ditional".This menu item displays the peak values of the electronics tempera-ture as well as the dielectric constant.


The menu item "Echocurve" shows the signal strength of the echoes over the measuring range in V. The signal strength enables an evalua-tion of the quality of the measurement.

With the following functions you can zoom part sections of the echo curve.

• "X-Zoom": Zoom function for the meas. distance• "Y-Zoom":1,2,5and10xsignalmagnificationin"V"• "Unzoom": Reset the presentation to the nominal measuring range

withsinglemagnification

In this menu item you can simulate measured values via the current output. This allows the signal path to be tested, e.g. through down-stream indicating instruments or the input card of the control system.

Select the requested simulation size and adjust the requested value.

Diagnostics - Peak values Additional

Diagnostics - Echo curve

Diagnosis - Simulation


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Caution:During simulation, the simulated value is outputted as 4 … 20 mA cur-rent value and digital HART signal.Push the [ESC] key to deactivate the simulation.

Information:The simulation is terminated automatically 60 minutes after the last key has been pressed.

With the menu item "Setup" the echo curve it is possible to save at the time of setup. This is generally recommended; for using the Asset Management functions it is necessary. If possible, the curve should be saved with a low level in the vessel.With this, you can detect signal changes over the operating time. With the adjustment software PACTware and the PC, the high-resolution echo curve can be displayed and used to compare the echo curve of the setup with the actual echo curve.

The function "Echocurvememory" enables storing echo curves of the measurement.Under the sub-menu item "Echocurvememory" you can store the current echo curve.Parameter settings for recording the echo curve and the settings of the echo curve itself can be carried out in the adjustment software PACTware.With the adjustment software PACTware and the PC the high-reso-lution echo curve can be displayed and used later on to assess the quality of the measurement.

With the function "Proof test", the function of the instrument can be checked on a recurring basis.

During the function test, the safety function must be treated as unsafe. Keepinmindthatthefunctiontestinfluencesdownstreamconnecteddevices.

Diagnostics - Echo curve memory

Diagnosis - Proof test


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YoucanfinddetailedinformationontheprooftestintheSafetyManual(SIL).

Entering a 4-digit PIN protects the sensor data against unauthorized accessandunintentionalmodification.Inthismenuitem,thePINisdisplayed or edited and changed. However, this menu item is only available if adjustment is enabled in the menu "Lock/Release setup/adjustment".

In delivery status, the PIN is "0000".

In this menu item, the internal clock of the sensor is adjusted.

With a reset, certain parameter adjustments carried out by the user are reset.

The following reset functions are available:Delivery status: Restoring the parameter settings at the time of ship-mentfromthefactoryincl.theorder-specificsettings.Acreatedfalsesignal suppression, user-programmable linearization curve as well as the measured value memory will be deleted.Basic settings: Resetting of the parameter settings incl. special parameterstothedefaultvalues(presettings)oftherespectiveinstru-ment. Any created false signal suppression or user-programmable lin-earization curve as well as the measured value memory are deleted.The following tables show the default values of the instrument. De-pending on the instrument version or application, all menu items may notbeavailableorsomemaybedifferentlyassigned.The menu items in bold are safety-relevant in terms of the functional safetyaccordingtoIEC61508(Edition2)SIL.

Additional settings - PIN

Additional adjustments - Date Time

Additional adjustments - Reset


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Setup

Menu item Default value Modifiedvalue

Lock adjustment Locked

Measurement loop name Sensor

Units Distance unit: mmTemperature unit: °C

Probe length Length of the probe Ex factory

Type of medium Liquid

Application Level, vessel

Medium, dielectric constant Water-based,>10

Superimposed gas phase Yes

Dielectric constant, upper medium (TS) 1.5

Tube inner diameter 200 mm

Max. adjustment - Level 100 %

Max. adjustment - Level Distance:0.000m(d)-noteblock-ing distances

Min. adjustment - Level 0 %

Min. adjustment - Level Distance: Probe length - take dead band into account

Accept adjustment of the level measurement? Yes

Max. adjustment - Interface 100 %

Max. adjustment - Interface Distance:0.000m(d)-noteblock-ing distances

Min. adjustment - Interface 0 %

Min. adjustment - Interface Distance: Probe length - take dead band into account

Integration time - Level 0.0 s

Integration time - Interface 0.0 s

Linearization type Linear

Linearization - Socket correction 0 mm

Linearization - Vessel height Probe length

Scaling size - Level Volume in l

Scaling unit - Level Litres

Scaling format - Level Without decimal positions

Scaling level - 100 % correspond to 100

Scaling level - 0 % correspond to 0

Accept scaling of the level measurement Yes

Scaling variable - Interface Volume

Scaling unit - Interface Litres

Scaling format - Interface Without decimal positions


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Scaling interface - 100 % correspond to 100

Scaling interface - 0 % correspond to 0

Current output, output variableFirstHARTvariable(PV)

Lin. percent - Level

Current output - Output characteristics 0 … 100 % correspond to 4 … 20 mA

Current output - Reaction in case of failure ≤3.6mA

Current output - Min. 3.8 mA

Current output - Max. 20.5 mA

Current output 2 - Output variableSecondHARTvariable(SV)

Distance - Level

Current output 2 - Output characteristics 0 … 100 % correspond to 4 … 20 mA

Current output 2 - Reaction in case of failure ≤3.6mA

Current output - Min. 3.8 mA

Current output - Max. 20.5 mA

ThirdHARTvariable(TV) Measurement certainty, level

FourthHARTvariable(QV) Electronics temperature

Display


Language Order-specific

Displayed value 1 Filling height Level

Displayed value 2 Electronics temperature

Backlight Switchedoff

Diagnostics


Status signals - Function control Switched on

Statussignals-Outofspecification Switchedoff

Status signals - Maintenance Switched on

Device memory - Echo curve memory Stopped

Device memory - Measured value memory Started

Device memory - Measured value memory - Measured values

Distance level, percentage value level, reliability level, electronics temperature

Device memory - Measured value memory - Re-cording in time interval

3 min.

Device memory - Measured value memory - Re-cordingwithmeasuredvaluedifference

15 %


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Device memory - Measured value memory - Start with measured value

Not active

Device memory - Measured value memory - Stop with measured value

Not active

Device memory - Measured value memory - Stop recording when memory is full

Not active

Additional adjustments


PIN 0000

Date Actual date

Time Actual time

Time - Format 24 hours

Probe type Device-specific

HART mode Analogue current output

The instrument settings are copied with this function. The following functions are available:

• Read from sensor: Read data from sensor and store into the display and adjustment module

• Write into sensor: Store data from the display and adjustment module back to the sensor

The following data or settings for adjustment of the display and ad-justment module are saved:

• All data of the menu "Setup" and "Display"• In the menu "Additional adjustments" the items "Reset, Date/Time"• Special parameters

The copied data are permanently saved in an EEPROM memory in the display and adjustment module and remain there even in case of power failure. From there, they can be written into one or more sen-sors or kept as backup for a possible electronics exchange.

Note:Before the data are stored in the sensor, a check is carried out to determineifthedatafitthesensor.Ifthedatadonotfit,afaultsignalis triggered or the function is blocked. When data are being written into the sensor, the display shows which instrument type the data originate from and which TAG-no. this sensor had.

In this menu item you can select the type and size of your probe from a list of all possible probes. This is necessary to adapt the electronics optimally to the probe.

Additional adjustments - Copy instrument settings

Additional adjustments - Probe type


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In this menu item you gain access to the protected area where you can enter special parameters. In exceptional cases, individual parameterscanbemodifiedinordertoadaptthesensortospecialrequirements.Change the settings of the special parameters only after having con-tactedourservicestaff.

ThesensorisfixadjustedtotheHARTmode"Analogue current output".Thisparametercannotbemodified.

The default setting is "Analogue current output" and the address 00.

In this menu, you read out the instrument name and the instrument serial number.

In this menu item, the hardware and software version of the sensor is displayed.

In this menu item, the date of factory calibration of the sensor as well as the date of the last change of sensor parameters are displayed via the display and adjustment module or via the PC.

In this menu item, the features of the sensor such as approval, pro-cessfitting,seal,measuringrange,electronics,housingandothersare displayed.

Additional adjustments - Special parameters

Additional adjustments - HART mode

Info - Instrument name

Info - Instrument version

Info - Factory calibration date

Info - Sensor character-istics


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7.4 Saving the parameter adjustment dataWe recommended noting the adjusted data, e.g. in this operating instructions manual, and archiving them afterwards. They are thus available for multiple use or service purposes.If the instrument is equipped with a display and adjustment module, the data in the sensor can be saved in the display and adjustment module. The procedure is described in the operating instructions manual "Display and adjustment module" in the menu item "Copysensor data". The data remain there permanently even if the sensor power supply fails.The following data or settings for adjustment of the display and ad-justment module are saved:

• All data of the menu "Setup" and "Display"• In the menu "Additional adjustments" the items "Sensor-specific

units,temperatureunitandlinearization"• The values of the user programmable linearization curve

The function can also be used to transfer settings from one instru-ment to another instrument of the same type. If it is necessary to exchange a sensor, the display and adjustment module is inserted into the replacement instrument and the data are likewise written into the sensor via the menu item "Copysensordata".


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8 Setup with PACTware

8.1 Connect the PC

3

1

2

Fig.27:ConnectionofthePCdirectlytothesensorviatheinterfaceadapter1 USBcabletothePC2 Interface adapter3 Sensor

1

3

2

5

4

Fig.28:ConnectingthePCviaHARTtothesignalcable1 Sensor2 HARTresistance250Ω(optionaldependingonprocessing)3 Adapter cable for HART modem4 Processingsystem/PLC/Voltagesupply5 HART modem

Via the interface adapter directly on the sensor

Connection via HART


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8.2 Parameter adjustment with PACTwareFor parameter adjustment of the sensor via a Windows PC, the configurationsoftwarePACTwareandasuitableinstrumentdriver(DTM)accordingtoFDTstandardarerequired.TheavailableDTMsare compiled on a DVD. The DTMs can also be integrated into other frame applications according to FDT standard.

Note:To ensure that all instrument functions are supported, you should always use the latest DTM. Furthermore, not all described functions areincludedinolderfirmwareversions.Youcandownloadthelatestinstrument software from our homepage. A description of the update procedure is also available in the Internet.The further setup steps are described in the online help of PACTware and the DTMs.

Fig.29:ExampleofaDTMview

ThedeviceDTMincludesanassistantforsimpleprojectconfigurationsimplifying the adjustment considerably. You can save and print your project documentation as well as import and export projects.You can also save measured value and echo curves in the DTM. Furthermore a tank calculation program as well as a multiviewer for indication and analysis of the saved measured value and echo curves are available.The supplied DVD includes the respective device DTM. How-ever, you can also download the DTM from our homepage www.siemens.com/sitranslg.

Prerequisites

Device DTMs


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8.3 Saving the parameter adjustment dataWe recommend documenting or saving the parameter adjustment data via PACTware. That way the data are available for multiple use or service purposes.


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9 Set up with other systems

9.1 DD adjustment programsDevicedescriptionsasEnhancedDeviceDescription(EDD)areavailable for DD adjustment programs such as, for example, AMS™ and PDM.

9.2 Field Communicator 375, 475Device descriptions for the instrument are available as EDD for pa-rameter adjustment with the Field Communicator 375 or 475.For the integration of the EDD in the Field Communicator 375 or 475, the software "Easy Upgrade Utility" is required which is available from the manufacturer. This software is updated via the Internet and new EDDs are automatically taken over into the device catalogue of this software after they are released by the manufacturer. They can then be transferred to a Field Communicator.


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10 Diagnostics and service

10.1 MaintenanceIf the device is used correctly, no maintenance is required in normal operation.Whenusedinsafety-instrumentedsystems(SIS),thesafetyfunctionmust be carried out on the instrument in regular time intervals by means of a proof test.Hencepossibleundetected,dangerousfailurecanbeidentified.The operator's responsibility to select the kind of test. The time inter-vals depend on the used PFDAVG.During the function test, the safety function must be treated as unsafe. Keepinmindthatthefunctiontestinfluencesdownstreamconnecteddevices.If one of the tests proves negative, the entire measuring system must be switched out of service and the process held in a safe state by means of other measures.YoucanfinddetailedinformationontheprooftestintheSafetyManual(SIL).

10.2 Diagnosis memoryThe instrument has several memories which are available for diagno-sis purposes. The data remain even with voltage interruption.

Up to 100,000 measured values can be stored in the sensor in a ring memory. Each entry contains date/time as well as the respective measured value. Storable values are for example:

• Distance• Filling height• Percentage value• Lin. percent• Scaled• Current value• Meas. reliability• Electronics temperature

When the instrument is shipped, the measured value memory is active and stores distance, measurement certainty and electronics temperature every 3 minutes.In "Extended adjustment" you can select the respective measured values.The requested values and recording conditions are set via a PC with PACTware/DTM or the control system with EDD. Data are thus read out and also reset.

Up to 500 events are automatically stored with a time stamp in the sensor(non-deletable).Eachentrycontainsdate/time,eventtype,event description and value. Event types are for example:

• Modificationofaparameter

Measured value memory

Event memory


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• Switch-onandswitch-offtimes• Statusmessages(accordingtoNE107)• Errormessages(accordingtoNE107)The data are read out via a PC with PACTware/DTM or the control system with EDD.

The echo curves are stored with date and time and the corresponding echo data. The memory is divided into two sections:Echo curve of the setup: This is used as reference echo curve for the measurement conditions during setup. Changes in the measure-ment conditions during operation or buildup on the sensor can thus be recognized. The echo curve of the setup is stored via:

• PC with PACTware/DTM • Control system with EDD • Display and adjustment module

Further echo curves: Up to 10 echo curves can be stored in a ring bufferinthismemorysection.Furtherechocurvesarestoredvia:

• PC with PACTware/DTM • Control system with EDD • Display and adjustment module

10.3 Status messagesThe instrument features self-monitoring and diagnostics according to NE 107 and VDI/VDE 2650. In addition to the status messages in the following tables there are more detailed error messages available under the menu item "Diagnostics" via the display and adjustment module, PACTware/DTM and EDD.

The status messages are divided into the following categories:

• Failure• Function check• Outofspecification• Maintenance requirement

and explained by pictographs:

41 2 3Fig. 30: Pictographs of the status messages1 Failure - red2 Outofspecification-yellow3 Function check - orange4 Maintenance - blue

Echo curve memory

Status messages


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Failure: Due to a malfunction in the instrument, a failure message is outputted.This status message is always active. It cannot be deactivated by the user.Function check: The instrument is in operation, the measured value istemporarilyinvalid(forexampleduringsimulation).This status message is inactive by default. It can be activated by the user via PACTware/DTM or EDD.Outofspecification: The measured value is unstable because the instrumentspecificationisexceeded(e.g.electronicstemperature).This status message is inactive by default. It can be activated by the user via PACTware/DTM or EDD.Maintenance:Duetoexternalinfluences,theinstrumentfunctionislimited.Themeasurementisaffected,butthemeasuredvalueisstill valid. Plan in maintenance for the instrument because a failure is expectedinthenearfuture(e.g.duetobuildup).This status message is inactive by default. It can be activated by the user via PACTware/DTM or EDD.

The following table shows the error codes in the status message "Failure"andgivesinformationonthereasonandrectification.Keepin mind that some information is only valid with four-wire instruments.

CodeText mes-sage

Cause Rectification

F013no measured value avail-able

– Sensor does not detect an echo during operation

– Process component or probe contaminated or defective

– Check or correct installation and/or parameter adjust-ment

– Clean or exchange process component or probe

F017Adjustment span too small

– Adjustment not within specification

– Change adjustment accord-ingtothelimitvalues(dif-ference between min. and max.≥10mm)

F025Error in the linearization table

– Index markers are not con-tinuously rising, for example illogical value pairs

– Check values of the lineari-zation table

– Delete/create a new lineari-zation table

F036No operable software

– Failed or interrupted soft-ware update

– Repeat software update – Check electronics version – Exchanging the electronics – Send instrument for repair

F040Error in the electronics

– Hardware defect – Exchanging the electronics – Send instrument for repair

F041Probe loss

– Cable probe broken or rod probe defective

– Check probe and exchange, if necessary

Failure


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CodeText mes-sage

Cause Rectification

F080General soft-ware error

– General software error – Disconnect operating volt-agebriefly

F105Measured value is deter-mined

– The instrument is still in the start phase, the measured value could not yet be determined

– Wait for the end of the switch-on phase

– Duration depending on the version and parameter adjustment max. 5 min.

F113Communica-tion error

– EMC interference – Transmission error with the

external communication with 4-wire power supply unit

– RemoveEMCinfluences – Exchange 4-wire power

supply unit or electronics

F125Impermissi-ble electronics temperature

– Temperature of the elec-tronicsinthenon-specifiedsection

– Check ambient temperature – Isolate electronics – Use instrument with higher

temperature range

F260Error in the calibration

– Error in the calibration car-ried out in the factory

– Error in the EEPROM

– Exchanging the electronics – Send instrument for repair

F261Error in the instrument settings

– Error during setup – Error when carrying out a

reset – False signal suppression

faulty

– Carry out a reset – Repeat setup

F264Installation/Setup error

– Error during setup – Check or correct installation and/or parameter adjust-ment

– Check probe length

F265Measurement function dis-turbed

– Sensor no longer carries out a measurement

– Carry out a reset – Disconnect operating volt-agebriefly

F266Impermissi-ble operating voltage

– Operating voltage below specifiedrange

– Check electrical connection – if necessary, increase

operating voltage

F267No executable sensor soft-ware

– Sensor cannot start – Exchanging the electronics – Send instrument for repair

The following table shows the error codes and text messages in the status message "Function check" and provides information on causes as well as corrective measures.

Function check


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CodeText mes-sage

Cause Rectification

C700Simulation ac-tive

– A simulation is active – Finish simulation – Wait for the automatic end

after 60 mins.

C701Parameter verification

– Parameterverificationwasinterrupted

– Finishparameterverifica-tion

The following table shows the error codes and text messages in the status message "Outofspecification" and provides information on causes as well as corrective measures.

CodeText mes-sage

Cause Rectification

S600Impermissi-ble electronics temperature

– Temperature of the pro-cessing electronics in the non-specifiedsection

– Check ambient temperature – Isolate electronics – Use instrument with higher

temperature range

S601Overfilling

– Level echo in the close range not available

– Reduce level – 100 % adjustment: Increase

value – Check mounting socket – Remove possible interfering

signals in the close range – Use coaxial probe

S602Level with-in the search range, com-pensation echo

– Compensation echo super-imposed by medium

– 100 % adjustment: Increase value

S603Impermissi-ble operating voltage

– Operating voltage below specifiedrange

– Check electrical connection – if necessary, increase

operating voltage

The following table shows the error codes and text messages in the status message "Maintenance" and provides information on causes as well as corrective measures.

CodeText mes-sage

Cause Rectification

M500Error in the delivery sta-tus

– With the reset to delivery status, the data could not be restored

– Repeat reset – LoadXMLfilewithsensor

data into the sensor

Outofspecification

Maintenance


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CodeText mes-sage

Cause Rectification

M501Error in the non-active linearization table

– Hardware error EEPROM – Exchanging the electronics – Send instrument for repair

M502Error in the event memory

– Hardware error EEPROM – Exchanging the electronics – Send instrument for repair

M503Reliability too low

– Measurement certainty is too low for a reliable meas-urement


– Check installation and process conditions


M504Error on an device inter-face

– Hardware defect – Exchanging the electronics – Send instrument for repair

M505no measured value avail-able

– Sensor does not detect an echo during operation

– Check and correct instal-lation and/or parameter adjustment



M506Installation/Setup error

– Error during setup – Check and correct instal-lation and/or parameter adjustment

– Check probe length

M507Error in the instrument settings

– Error during setup – Error when carrying out a

reset – False signal suppression

faulty

– Carry out reset and repeat setup

10.4 Rectify faultsThe operator of the system is responsible for taking suitable meas-ures to rectify faults.

Thefirstmeasuresare:

• Evaluation of fault messages, for example via the display and adjustment module

• Checking the output signal• Treatment of measurement errors

Further comprehensive diagnostics options are available with a PC with PACTware and the suitable DTM. In many cases, the reasons can bedeterminedinthiswayandfaultsrectified.

Reaction when malfunc-tions occur

Procedure for fault recti-fication


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Connect a multimeter in the suitable measuring range according to the wiring plan. The following table describes possible errors in the current signal and helps to remove them:

Error Cause Rectification

4 … 20 mA signal not stable

– Fluctuations of the measured variable

– Set damping according to the instrument via the display and adjustment module or PACTware/DTM

4 … 20 mA signal missing

– Electrical con-nection faulty

– Check connection according to chapter "Connectionsteps" and if necessary, correct according to chapter "Wiring plan"

– Voltage supply missing

– Check cables for breaks; repair if necessary

– Operating volt-age too low or load resistance too high

– Check, adapt if necessary

Current sig-nal greater than 22 mA or less than 3.6 mA

– Electronics module in the sensor defec-tive

– Exchange the instrument or send it in for repair

The below tables show typical examples for application-relevant measurement errors. There are two measurement errors:

• Constant level• Filling• Emptying

The images in column "Errorpattern" show the real level with a bro-ken line and the level displayed by the sensor as a continuous line.

12

Leve

l

time0

Fig. 31: The broken line 1 shows the real level, the continuous line 2 shows the level displayed by the sensor

Note:• Wherever the sensor displays a constant value, the reason could

also be the fault setting of the current output to "Hold value"• In case of a too low level indication, the reason could be a line

resistance that is too high

Check the 4 … 20 mA signal

Treatment of measure-ment errors


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Measurement error with constant level

Fault description Error pattern Cause Rectification

1. Measured value shows a too low or too high level

Leve

ltime0

– Min./max. adjustment not correct

– Adapt min./max. adjustment

– Wrong linearization curve – Adapt linearization curve

– Runningtimeerror(smallmeasurement error close to 100 %/serious error close to 0 %)

– Repeat setup

2. Measured value jumps towards 100 % Le

vel

time0

– Due to the process, the ampli-tude of the product echo sinks

– A false signal suppression was not carried out

– Carry out a false signal sup-pression

– Amplitude or position of a falsesignalhaschanged(e.g.buildup); false signal suppres-sion no longer matches

– Determine the reason for the changed false signals, carry out false signal suppression, e.g. with buildup

Measurementerrorduringfilling


3. Measured value re-mains in the area of the bottomduringfilling

Leve

l

time0

– Echo from the probe end larger than the product echo, for example, with products with εr < 2.5 oil-based, solvents, etc.

– Check parameter "Medium" and "Vessel height", adapt if necessary

4. Measured value re-mains momentarily unchangedduringfill-ing and then jumps to the correct level

Leve

l

time0

– Turbulence on the product surface,quickfilling

– Check parameters, change if necessary, e.g. in dosing ves-sel, reactor

5. Measured value jumps sporadically to 100%duringfilling

Level

time0

– Changing condensation or contamination on the probe

– Carry out a false signal sup-pression

6. Measured value jumpsto≥100%or0 m distance

Leve

l

time0

– Level echo is no longer detected in the close range due to false signals in the close range. The sensor goes into overfillprotectionmode.Themax.level(0mdistance)aswell as the status message "Overfillprotection"areoutput-ted.

– Eliminate false signals in the close range

– Check installation conditions – Ifpossible,switchoffthefunc-tion"Overfillprotection"


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Measurement error during emptying


7. Measured value re-mains unchanged in the close range during emptying

Leve

l

time0

– False echo larger than the level echo

– Level echo too small

– Eliminate false signals in the close range

– Remove contamination on the probe. After having removed the source of the false signals, the false signal suppression must be deleted.

– Carry out a new false signal suppression

8. Measured value re-mains reproducible in one position during emptying

Leve

l

time0

– Stored false signals in this position are larger than the level echo

– Delete false signal memory – Carry out a new false signal

suppression

Depending on the reason for the fault and the measures taken, the steps described in chapter "Setup" must be carried out again or must be checked for plausibility and completeness.

10.5 Exchanging the electronics moduleIf the electronics module is defective, it can be replaced by the user.WithSILqualifiedinstrument,onlyarespectiveelectronicsmodulewithSILqualificationmustbeused.In Ex applications, only instruments and electronics modules with ap-propriate Ex approval may be used.Order the replacement electronics module through the agency serving you. The electronics modules are adapted to the respective sensor.It is absolutely necessary that the factory settings of the sensor are loaded into the electronics module. Therefore please state the serial number of the sensor when ordering the replacement electronics module.The serial numbers are stated on the type label of the instrument, inside the housing or on the delivery note.The replacement electronics module is provided with the serial number of the appropriate sensor. Check if the serial number on the replacement electronics module and the serial number of the sensor correspond.Alluser-specificsettingsmustbeenteredagain.Hence,youhavetocarry out a new setup after the electronics exchange.If you have stored the data of the parameter adjustment during the firstsetupofthesensor,youcantransferthesetothereplacementelectronics module. A new setup is no more necessary.After the new setup and the transfer of the parameterization date, you have to verify the parameters. Only then, the instrument will be ready for operation, again.

Reaction after fault recti-fication


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10.6 Exchanging the cable/rodIfnecessary,thecableorrod(measuringpart)oftheprobecanbeexchanged.Loosentherodorcablewithaforkwrench,wrenchsize7(rodø8,cableø2and4)orwrenchsize10(rodø12).

Note:When exchanging the rod or cable, make sure that the instrument and the new rod or cable are dry and clean.1. Loosentherodorcablewithaforkwrenchappliedtotheflat

surface, provide counterforce with another fork wrench.2. Drytheprocessfittingandtheupperrodendbeforeunscrewing

the measuring rod.3. Unscrew the loosened rod or cable manually.4. Insert the new measuring rod carefully by hand with a screwing

motionintotheopeningoftheprocessfitting.5. Continue screwing in the rod manually into the opening of the pro-

cessfitting.6. Exert counterforce with the second fork spanner and tighten the

rodorcableontheflatsurfaceswiththefollowingtorque.Rodø8,cableø2and4:6Nm(4.43lbfft)Rodø12:10Nm(7.37lbfft)

Fig.40:Exchangecableorrod

Exchanging the cable/rod


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Information:Pleasemaintainthespecifiedtorquesothatthemax.tensilestrengthremains.7. Enter new probe length and if necessary the new probe type and

thencarryoutafreshadjustment(see"Setupprocedure,Carry-ingoutmin.adjustment-Carryingoutmax.adjustment").

The rod or cable of the probe can be shortened individually.1. Mark the requested length with mounted measuring rod.2. Cable:Loosenthepinsonthegravityweight(hexagon3)3. Cable: remove the pins4. Cable: Pull the cable out of the gravity weight5. Shortenthecable/rodwithacut-offwheelormetalsawatthe

marking.Takenoteofthespecificationsinthefollowingillustrationwhen shortening the cable.

6. Cable with gravity weight: Shift the cable according to the drawing into the gravity weight

7. Cable with gravity weight: Fasten cable with the pins, torque 7 Nm (5.16lbfft)Cable with centering weight: Fasten cable with the pins, torque 7Nm(5.16lbfft)andfixtheclampingpartonthecenteringweight.

8. Enter new probe length and then carry out a fresh adjustment (see"Setupprocedure,Carryingoutmin.adjustment-Carryingout max. adjustment").

11

1

2 2 3A B C

45 m

m

(1.7

7")

100

mm

(3

.94"

)

25 m

m

(0.9

8")

50

mm

(1

.97"

)

Fig. 41: Shortening the cable probeA Gravity weight - cable ø 4 mmB Gravity weight - cable ø 2 mmC Centeringweight-cableø2mm1 Threaded pins2 Thread M8 for eye-bolt3 Fixing screw - centering weight

Shorten cable/rod


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10.7 Software updateThe following components are required to update the sensor soft-ware:

• Sensor• Voltage supply• HART modem• PC with PACTware• CurrentsensorsoftwareasfileYoucanfindtheactualsensorsoftwareaswellasdetailedinfor-mation of the procedure in the download area on our homepage: www.siemens.com/sitranslg.Youcanfindinformationabouttheinstallationinthedownloadfile.

Caution:Instruments with approvals can be bound to certain software ver-sions.Thereforemakesurethattheapprovalremainseffectivewithasoftware update.Youcanfinddetailedinformationinthedownloadareaonourhome-page: www.siemens.com/sitranslg.

10.8 How to proceed if a repair is neededIf it is necessary to repair the instrument, please contact Sie-mensMilltronicsProcessInstruments.Youfindthelocationson"www.siemens.com/sitranslg".


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11 Dismounting

11.1 Dismounting stepsWarning:Before dismounting, be aware of dangerous process conditions such as e.g. pressure in the vessel or pipeline, high temperatures, cor-rosive or toxic products etc.Take note of chapters "Mounting" and "Connectingtopowersupply" and carry out the listed steps in reverse order.

11.2 DisposalThe instrument consists of materials which can be recycled by spe-cialised recycling companies. We use recyclable materials and have designed the parts to be easily separable.Correctdisposalavoidsnegativeeffectsonhumansandtheenviron-ment and ensures recycling of useful raw materials.Materials: see chapter "Technical data"If you have no way to dispose of the old instrument properly, please contact us concerning return and disposal.

WEEE directive 2002/96/EGThis instrument is not subject to the WEEE directive 2002/96/EG and the respective national laws. Pass the instrument directly on to a spe-cialised recycling company and do not use the municipal collecting points. These may be used only for privately used products according to the WEEE directive.


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12 Supplement

12.1 Technical dataGeneral data316L corresponds to 1.4404 or 1.4435Materials, wetted parts

Ʋ Processfitting(versionupto6bar) 316L and PPS GF 40 Ʋ Processfitting(versionupto40bar) 316LandPEEK,AlloyC22(2.4602)andPEEK Ʋ Process seal on the instrument side (cable/rodleadthrough)

FKM(SHSFPM70C3GLT),FFKM(Kalrez6375),EPDM(A+P75.5/KW75F),siliconeFEPcoated(A+PFEP-O-SEAL)

Ʋ Process seal Onsite(instrumentswiththread:KlingersilC-4400isattached)

Ʋ Rod:ø8mm(0.315in) 316LorAlloyC22(2.4602) Ʋ Rod:ø12mm(0.472in) 316LorAlloyC22(2.4602) Ʋ Cable:ø2mm(0.079in) 316(1.4401)orAlloyC-276(2.4819) Ʋ Cable:ø4mm(0.157in) 316LorAlloyC22(2.4602) Ʋ Innerconductor(uptothecable) 316L Ʋ Gravityweight(optionallyavailable) 316L Ʋ Centeringweight(optionallyavailable) 316L

Materials, non-wetted parts Ʋ Plastic housing plasticPBT(Polyester) Ʋ Aluminium die-casting housing Aluminium die-casting AlSi10Mg, powder-coated - basis:

Polyester Ʋ Stainless steel housing - precision casting

316L

Ʋ Stainless steel housing, electropol-ished

316L

Ʋ Secondlineofdefence(optional) Borosilicate glass GPC 540 with 316L and Alloy C22 Ʋ Seal between housing and housing cover

NBR(stainlesssteelhousing,precisioncasting),silicone(aluminium/plastichousing;stainlesssteelhousing,electropolished)

Ʋ Inspection window in housing cover (optional)

Polycarbonate(withExdversion:glass)

Ʋ Ground terminal 316LSecondlineofdefence(optional)

Ʋ Supporting material 316L Ʋ Glass potting Borosilicate glass GPC 540 Ʋ Contacts Alloy C22 Ʋ Helium leak rate < 10-6 mbar l/s Ʋ Pressure resistance See process pressure of the sensor

Ohmic contact Betweengroundterminal,processfittingandprobe


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Processfittings Ʋ Pipethread,cylindrical(ISO228T1) G¾, G1, G1½ according to DIN 3852-A Ʋ American pipe thread, conical (ASMEB1.20.1)

¾ NPT, 1 NPT, 1½ NPT

Ʋ Flanges e.g. DIN from DN 25, ANSI from 1"Weight

Ʋ Instrumentweight(dependingonprocessfitting)

approx.0.8…8kg(0.176…17.64lbs)

Ʋ Rod:ø8mm(0.315in) approx.400g/m(4.3oz/ft) Ʋ Rod:ø12mm(0.472in) approx.900g/m(9.68oz/ft) Ʋ Cable:ø2mm(0.079in) approx.16g/m(0.17oz/ft) Ʋ Cable:ø4mm(0.157in) approx.60g/m(0.65oz/ft) Ʋ Gravityweightforcableø2mm(0.079in)

100g(3.22oz)

Ʋ Gravityweightforcableø4mm(0.157in)

200g(6.43oz)

Ʋ Centeringweightø40mm(1.575in) 180g(5.79oz) Ʋ Centeringweightø45mm(1.772in) 250g(8.04oz) Ʋ Centeringweightø75mm(2.953in) 825g(26.52oz) Ʋ Centeringweight(ø95mm(3.74in) 1050g(33.76oz)

ProbelengthL(fromsealsurface) Ʋ Rod:ø8mm(0.315in) upto6m(19.69ft) Ʋ Rod:ø12mm(0.472in) upto6m(19.69ft) Ʋ Trimming accuracy - rod ±(1mm+0.05%oftherodlength) Ʋ Cable:ø2mm(0.079in) upto75m(246.1ft) Ʋ Cable:ø4mm(0.157in) upto75m(246ft) Ʋ Trimming accuracy - cable ±(2mm+0.05%ofthecablelength)

Lateral load Ʋ Rod:ø8mm(0.315in) 10Nm(7.38lbfft) Ʋ Rod:ø12mm(0.472in) 30Nm(22.13lbfft)

Max. tensile load Ʋ Cable:ø2mm(0.079in)-316(1.4401)

1.5KN(337lbf)

Ʋ Cable:ø2mm(0.079in)-AlloyC-276(2.4819)

1.0KN(225lbf)

Ʋ Cable:ø4mm(0.157in) 2.5KN(562lbf)Thread in gravity weight, e.g. for eye-bolt (cableversion)

M 8

Torqueforexchangeablecableorrodprobe(intheprocessfitting) Ʋ Cable:ø2mm(0.079in) 6Nm(4.43lbfft) Ʋ Cable:ø4mm(0.157in) 6Nm(4.43lbfft) Ʋ Rod:ø8mm(0.315in) 6Nm(4.43lbfft)


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Ʋ Rod:ø12mm(0.472in) 10Nm(7.38lbfft)Torque for NPT cable glands and Conduit tubes

Ʋ Plastic housing max.10Nm(7.376lbfft) Ʋ Aluminium/Stainless steel housing max.50Nm(36.88lbfft)

Input variableMeasured variable Level of liquidsMin. dielectric constant of the medium

Ʋ Cable probes εr≥1.6 Ʋ Rod probes εr≥1.6

2

4

5

32

4

5

3

1 1

Fig. 42: Measuring ranges - SITRANS LG2501 Reference plane2 Probe length L3 Measuring range (default setting refers to the measuring range in water)4 Upper dead band (see diagrams under Accuracy - grey section)5 Lower dead band (see diagrams under Accuracy - grey section)

Output variableOutput signal 4 … 20 mA/HARTRange of the output signal 3.8…20.5mA/HART(defaultsetting)FulfilledHARTspecification 7Signal resolution 0.3 µAFailuresignalcurrentoutput(adjustable) ≥21mA,≤3.6mAMax. output current 21.5 mA


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Starting current ≤10mAfor5msafterswitchingon,≤3.6mALoad see load diagram under Power supplyDamping(63%oftheinputvariable),adjustable

0 … 999 s

HARToutputvaluesaccordingtoHART7(defaultsetting)1)

Ʋ FirstHARTvalue(PV) Linearised percentage value, level Ʋ SecondHARTvalue(SV) Distance to the level Ʋ ThirdHARTvalue(TV) Measurement certainty, level Ʋ FourthHARTvalue(QV) Electronics temperature

Indication value - DIsplay and adjustment module2)

Ʋ Displayed value 1 Filling height Level Ʋ Displayed value 2 Electronics temperature

Resolution, digital <1mm(0.039in)

Output variable - Additional current outputFor details on the operating voltage see chapter "Voltage supply"Output signal 4…20mA(passive)Range of the output signal 3.8…20.5mA(defaultsetting)Signal resolution 0.3 µAFailuresignalcurrentoutput(adjustable) Lastvalidmeasuredvalue,≥21mA,≤3.6mAMax. output current 21.5 mAStarting current ≤10mAfor20msafterswitchingon,≤3.6mALoad Load resistor, see chapter "Voltage supply"Damping(63%oftheinputvariable),adjustable

0 … 999 s

Indication value - DIsplay and adjustment module3)

Ʋ Displayed value 1 Filling height Level Ʋ Displayed value 2 Electronics temperature

Resolution, digital <1mm(0.039in)

Accuracy (according to DIN EN 60770-1)Process reference conditions according to DIN EN 61298-1

Ʋ Temperature +18…+30°C(+64…+86°F) Ʋ Relative humidity 45 … 75 % Ʋ Air pressure +860 … +1060 mbar/+86 … +106 kPa

(+12.5…+15.4psig)Installation reference conditions

Ʋ Min. distance to installations >500mm(19.69in)

1) The output values can be assigned individually2) The indication values can be assigned individually3) The indication values can be assigned individually


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Ʋ Vessel metallic,ø1m(3.281ft),centricinstallation,processfittingflushwiththevesselceiling

Ʋ Medium Water/Oil(dielectricconstant~2.0)4)

Ʋ Installation Probe end does not touch the vessel bottomSensor parameter adjustment No gating out of false signals carried outTypical deviation - Interface measure-ment

±5mm(0.197in)

Typical deviation - Total level interface measurement

See following diagrams

Typical deviation - Level measurement5)6) See following diagrams

L

0-2�mm

(-0.079")

2�mm (0.079")

15�mm(0.591")

-10�mm (-0.394")

0,3 m(11.811")

0,08 m(3.15")

0,02 m(0.787")

1

Fig. 43: Deviation SITRANS LG250 in rod version in water1 Dead band - no measurement possible in this areaL Probe length

4) Withinterfacemeasurement=2.05) Depending on the installation conditions, there can be deviations which can be rectified with an adaptation oftheadjustmentorachangeofthemeasuredvalueoffsetintheDTMservicemode

6) The dead bands can be optimizes by a false signal suppression.


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L

2�mm(0.079")

0-2�mm

(-0.079")

15�mm(0.591")

-10�mm(-0.591")

0,3 m(11.811")

0,15 m(5.906")

0,05 m(1.97")

0,07 m(2.756")

11

Fig. 44: Deviation SITRANS LG250 in rod version in oil1 Dead band - no measurement possible in this areaL Probe length

0

2�mm(0.079")

-2�mm(-0.079")

15�mm(0.591")

10�mm(0.394")

0,08 m(3.15")

0,3 m(11.811")

0,1 m(3.94")

L

1

Fig. 45: Deviation SITRANS LG250 in cable version in water1 Dead band - no measurement possible in this areaL Probe length


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L

0

-15�mm(-0.591")

2�mm(0.079")

-2�mm(-0.079")

15�mm(0.591")

0,3 m(11.811")

0,15 m(5.906") 0,08 m

(3.15")

0,05 m(1.969")

1 1

Fig. 46: Deviation SITRANS LG250 in cable version ø 2 mm (0.079 in), in oil1 Dead band - no measurement possible in this areaL Probe length

0

-15�mm(-0.591")

2�mm(0.079")

-2�mm(-0.079")

15�mm(0.591")

0,3 m(11.811")

0,15 m(5.906") 0,15 m

(5.906")

20�mm(0.787")

0,05 m(1.969")

1 1

L

Fig. 47: Deviation SITRANS LG250 in cable version ø 4 mm (0.157 in), in oil1 Dead band - no measurement possible in this areaL Probe length

Repeatability ≤±1mmSpecificationsofthesafetytolerance(SIL)

See Safety Manual

VariablesinfluencingmeasurementaccuracySpecificationsforthedigitalmeasuredvalue


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Temperature drift - Digital output ±3 mm/10 K relating to the max. measuring range or max.10mm(0.394in)

Additional deviation through electromag-netic interference acc. to EN 61326

<±10mm(<±0.394in)

Specificationsapplyalsotothecurrentoutput7)

Temperature drift - Current output ±0.03 %/10 K relating to the 16 mA span max. ±0.3 %Deviation on the current output through analogue/digital conversion

< ±15 µA

Additional deviation through electromag-netic interference acc. to EN 61326

< ±150 µA

InfluenceofthesuperimposedgasandpressuretotheaccuracyThe propagation speed of the radar impulses in gas or vapour above the medium is reduced by highpressure.Thiseffectdependsonthesuperimposedgasorvapourandisespeciallylargeatlow temperatures.Thefollowingtableshowstheresultingdeviationforsometypicalgasesandvapours.Thespecifiedvalues refer to the distance. Positive values mean that the measured distance is too large, negative values that the measured distance is too small.

Gas phase Temperature Pressure

1 bar (14.5 psig) 10 bar (145 psig) 50 bar (725 psig)

Air 20 °C/68 °F 0.00 % 0.22 % 1.2 %

200 °C/392 °F -0.01 % 0.13 % 0.74 %

400 °C/752 °F -0.02 % 0.08 % 0.52 %

Hydrogen 20 °C/68 °F -0.01 % 0.10 % 0.61 %

200 °C/392 °F -0.02 % 0.05 % 0.37 %

400 °C/752 °F -0.02 % 0.03 % 0.25 %

Steam(saturatedsteam)

100 °C/212 °F 0.26 % - -

180 °C/356 °F 0.17 % 2.1 % -

264 °C/507 °F 0.12 % 1.44 % 9.2 %

366 °C/691 °F 0.07 % 1.01 % 5.7 %

Characteristics and performance dataMeasuring cycle time < 500 msStep response time8) ≤3sMax.filling/emptyingspeed 1 m/min

Ambient conditionsAmbient, storage and transport tempera-ture

-40…+80°C(-40…+176°F)

7) Also for the additional current output (optional)8) Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2).


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Process conditionsFortheprocessconditions,pleasealsonotethespecificationsonthetypelabel.Thelowestvaluealways applies.Themeasurementerrorthroughtheprocessconditionsinthespecifiedpressureandtemperaturerange is < 1 %.Process pressure

Ʋ ProcessfittingwithPPSGF40 -1…6bar/-100…600kPa(-14.5…87psi),dependingontheprocessfitting

Ʋ ProcessfittingwithAl2O3 -1…+40bar/-100…+4000kPa(-14.5…+580psig),dependingontheprocessfitting

Vesselpressurerelatingtotheflangenominal stage

see supplementary instructions manual "Flanges ac-cordingtoDIN-EN-ASME-JIS"

Processtemperature(threadorflangetemperature) Ʋ PPS GF 40 -40…+80°C(-40…+176°F) Ʋ FKM(SHSFPM70C3GLT) -40…+150°C(-40…+302°F) Ʋ EPDM(A+P75.5/KW75F) -40…+150°C(-40…+302°F) Ʋ SiliconeFEPcoated(A+PFEP-O-SEAL)

-40…+150°C(-40…+302°F)

Ʋ FFKM(Kalrez6375) -20…+150°C(-4…+302°F) Ʋ FFKM(Kalrez6375)-withtempera-ture adapter

-20…+200°C(-4…+392°F)

1

20°C

(32°F)

-40°C(-104°F)

65°C(149°F)

80°C(176°F)

150°C(302°F)

130°C(266°F)

80°C(176°F)

34

-40°C(-104°F)

Fig. 48: Ambient temperature - process temperature, standard version1 Ambient temperature2 Process temperature (depending on the seal material)3 Maximum permissible temperature - standard4 Limited temperature range - plastic housing and stainless steel housing, electropolished


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1

20°C

(32°F)

-40°C(-104°F)

55°C(131°F)

80°C(176°F)

200°C(392°F)

150°C(302°F)

34

-20°C(-68°F)

Fig. 49: Ambient temperature - process temperature, version with temperature adapter1 Ambient temperature2 Process temperature (depending on the seal material)3 Maximum permissible temperature - standard4 Limited temperature range - plastic housing and stainless steel housing, electropolished

Vibration resistance Ʋ Instrument housing 4gat5…200HzaccordingtoEN60068-2-6(vibration

with resonance) Ʋ Rod probe 1gwith5…200HzaccordingEN60068-2-6(vibration

atresonance)withrodlength50cm(19.69in)Shock resistance

Ʋ Instrument housing 100g,6msaccordingtoEN60068-2-27(mechanicalshock)

Ʋ Rod probe 25g,6msaccordingtoEN60068-2-27(mechanicalshock)withrodlength50cm(19.69in)

Electromechanical data - version IP 66/IP 67 and IP 66/IP 68; 0.2 barCable gland M20 x 1.5 or ½ NPTWirecross-section(spring-loadedterminals)

Ʋ Massive wire, cord 0.2…2.5mm²(AWG24…14) Ʋ Stranded wire with end sleeve 0.2…1.5mm²(AWG24…16)

Display and adjustment moduleDisplay element Display with backlightMeasured value indication

Ʋ Number of digits 5 Ʋ Size of digits WxH=7x13mm

Adjustment elements 4 keysProtection rating

Ʋ unassembled IP 20 Ʋ mounted into the housing without cover

IP 40


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Materials Ʋ Housing ABS Ʋ Inspection window Polyester foil

Integrated clockDate format Day.Month.YearTime format 12 h/24 hTime zone Ex factory CETRate deviation max. 10.5 min/year

Measurement electronics temeratureResolution 1°C(1.8°F)Accuracy ±1°C(1.8°F)

Voltage supplyOperating voltage

Ʋ Non-Ex instrument, Ex-d instrument 9.6 … 35 V DC Ʋ Ex-ia instrument 9.6 … 30 V DC Ʋ Ex-d-ia instrument 15 … 35 V DC

Operating voltage with illuminated display and adjustment module Ʋ Non-Ex instrument, Ex-d instrument 16 … 35 V DC Ʋ Ex-ia instrument 16 … 30 V DC Ʋ Ex-d-ia instrument 20 … 35 V DC

Interpolation protection IntegratedPermissible residual ripple - Non-Ex, Ex-ia instrument

Ʋ Frequency 16 … 400 Hz Ʋ for 12 V< UN < 18 V ≤0.7Veff Ʋ for 18 V< UN < 35 V ≤1.0Veff

Permissible residual ripple - Ex-d-ia instrument Ʋ Frequency 16 … 400 Hz Ʋ for 18 V< UN < 35 V ≤1.0Veff

Load resistor Ʋ Calculation (UB - Umin)/0.0215 A Ʋ Example - Non-Ex instrument with UB=24VDC

(24V-9.6V)/0.0215A=670Ω

Electrical protective measuresProtection rating

Housing material Version IP-protection class NEMA protection

Plastic Single chamber IP 66/IP 67 NEMA 4X

Double chamber IP 66/IP 67 NEMA 4X


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Housing material Version IP-protection class NEMA protection

Aluminium Single chamber IP66/IP68(0.2bar) NEMA 6P

Double chamber IP 66/IP 67IP66/IP68(0.2bar)

NEMA 4XNEMA 6P

Stainless steel, electro-polished

Single chamber IP66/IP68(0.2bar) NEMA 6P

Stainless steel, investment casting

Single chamber IP66/IP68(0.2bar) NEMA 6P

Double chamber IP 66/IP 67IP66/IP68(0.2bar)

NEMA 4XNEMA 6P

Overvoltage category III9)

Protection class III10)

ApprovalsInstrumentswithapprovalscanhavedeviatingtechnicaldata(dependingontheversion).Forsuchinstruments, the corresponding approval documents must be noted.

12.2 Dimensions

Plastic housing~ 69 mm(2.72")

ø 77 mm(3.03")

114

mm

(4.4

9")

M20x1,5/½ NPT

~ 86 mm (3.39")

M16x1,511

4 m

m (4

.49"

)

M20x1,5/½ NPT

ø 77 mm(3.03")

1 2

Fig. 50: Housing versions in protection IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher1 Single chamber version2 Double chamber version

9) IEC 61010-110) IEC 61010-1


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Aluminium housing

21

ø 84 mm (3.31")~ 116 mm (4.57")

120

mm

(4.7

2")

M20x1,5M20x1,5/½ NPT

~ 91 mm (3.58")

M16x1,5

ø 84 mm(3.31")

124

mm

(4.8

8")

M20x1,5/½ NPT

Fig. 51: Housing versions in protection IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher1 Single chamber version2 Double chamber version

Stainless steel housing~ 69 mm(2.72")

ø 77 mm(3.03")

119

mm

(4.6

9")

M20x1,5/½ NPT

~ 59 mm(2.32")

ø 80 mm(3.15")

112

mm

(4.4

1")

M20x1,5/½ NPT

~ 90 mm (3.54")ø 84 mm(3.31")

123

mm

(4.8

4")

M20x1,5/½ NPT

M16x1,5

321

Fig. 52: Housing versions in protection IP 66/IP 68 (0.2 bar) - with integrated display and adjustment module the housing is 9 mm/0.35 in higher1 Single chamber version, electropolished2 Single chamber version, precision casting3 Double chamber version, precision casting


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SITRANS LG250, cable version with gravity weight

1 2 3

L

SW 36 (1.42") (G¾, ¾ NPT)SW 41 (1.61") (G1, 1 NPT)SW 46 (1.81") (G1½, 1½ NPT)

G¾, ¾ NPT,G1, 1 NPT,G1½, 1½ NPT

22 m

m(0

.87"

)46

mm

(1.8

1")

100

mm

(3.9

4")

50 m

m(1

.97"

)

ø 16 mm(0.63")

ø 4 mm(0.16")

ø 4 mm(0.16")

ø 16 mm(0.63")

ø 16 mm(0.63")

100

mm

(3.9

4")

ø 20 mm(0.79")

ø 20 mm(0.79")

ø 20 mm(0.79")

ø 2 mm (0.08")

96 m

m(3

.78"

)22

mm

(0.8

7")

L

Fig. 53: SITRANS LG250, threaded version with gravity weight (all gravity weights with thread M8 for eye-bolt)L Sensor length, see chapter "Technical data"


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1 Cableversionø2mm(0.079in)withgravityweight2 Cableversionø4mm(0.157in)withgravityweight3 Cableversionwithtemperatureadapter

SITRANS LG250, cable version with centering weight

L


G¾, ¾ NPT,G1, 1 NPT,G1½, 1½ NPT 22

mm

(0.8

7")

46 m

m (1

.81"

)ø 4 mm(0.16")

30 m

m(1

.18"

)

X

30 m

m(1

.18"

)

X

ø 2 mm (0.08")

1 2

Fig. 54: SITRANS LG250, threaded versionL Sensor length, see chapter "Technical data"x ø 40 mm (1.57 in)

ø 45 mm (1.77 in)ø 75 mm (2.95 in)ø 95 mm (3.74 in)

1 Cableversionø2mm(0.079in)withcenteringweight(seesupplementaryinstructions"Centering")2 Cableversionø4mm(0.157in)withcenteringweight(seesupplementaryinstructions"Centering")


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SITRANS LG250, rod version

L


G¾, ¾ NPT,G1, 1 NPT,G1½, 1½ NPT 22

mm

(0.8

7")

46 m

m (1

.81"

)

ø 8 mm(0.32")

L

30�m

m(1

.18"

)

ø 12¨mm(0.47")

SW 55 (2.17") 51

mm

(2.0

1")

G1½, 1½ NPT

1 2

Fig. 55: SITRANS LG250, threaded versionL Sensor length, see chapter "Technical data"1 Rod version ø 8 mm (0.315 in)2 Rod version ø 12 mm (0.472 in)


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12.3 TrademarkAll the brands as well as trade and company names used are property of their lawful proprietor/originator.


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INDEX

AAccessories

– Display and adjustment module 12 – External display and adjustment unit 12

Adjustment – Max. adjustment 40, 41 – Min. adjustment 40, 41

Adjustment system 36Application 38, 39Application area 9

BBacklight 50Block adjustment 37

CCheck output signal 69Connecting

– Electrically 22 – Mechanically 14 – To the PC 59

Connection – Steps 22 – Technology 22

Connection cable 21Copy sensor settings 56Current output 2 45Current output Min./Max. 45Current output mode 45Current output, size 44Curve indication

– Echo curve 51

DDamping 41Date of manufacture 57Date/Time 53Default values 53Deviation 69

EEcho curve memory 64Echo curve of the setup 52EDD(EnhancedDeviceDescription)62Electronics and terminal compartment, single chamber housing 24Electronics compartment, double chamber housing 24Electronics compartment with Ex-d double chamber housing 26

Event memory 63

FFactory calibration date 57False signal suppression 46Faultrectification68Functional principle 9Functionalsafety(SIL)29Function test 31, 48

GGas phase 39Grounding 21

HHART address 57HART variables 45, 46

IInflowingmedium17Installation position 15

KKey function 35

LLanguage 49Linearization 42

MMain menu 36Meas. reliability 50Measured value indication 49Measured value memory 63Measurement loop name 38

NNAMUR NE 107

– Failure 65 – Function check 66 – Maintenance 67 –Outofspecification67

PPeak value indicator 50, 51PIN 30, 37, 47, 53Probe length 38Probe type 56Proof test 52


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RRead out info 57Release adjustment 47Repair 74Replacement parts

– Electronics module 12 – Rod extension 12 – Spacer 13

Reset 53

SScaling measured value 43, 44Sensor characteristics 57Sensor status 50SIL 29Simulation 51Special parameters 57Status messages - NAMUR NE 107 64

TType label 8Type of medium 38

UUnits 38

VVerify parameter 33

Notes


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Siemens AGIndustry sector1954 Technology DriveP.O. Box 4225Peterborough. ONCanada K9J7B1email: [email protected]

www.siemens.com/processautomation

Subject to change without prior noticePBD-51041378 Rev. 1.0

© Siemens AG 2014

For more informationwww.siemens.com/level

www.siemens.com/weighing

PBD-51041378Printed in Canada

Guided Wave Radar - Vision Solutions...to SIL3 (IEC 61508) the SITRANS LG250 is suitable for the use...

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Transcript of Guided Wave Radar - Vision Solutions...to SIL3 (IEC 61508) the SITRANS LG250 is suitable for the use...