Fischer DS21xxxH series Operating instructions

Brand: Fischer

Model: DS21xxxH series

Type: Operating instructions

This manual is also suitable for

DS21

OperatingManual

DS21...H

Differentialpressuremeasuringandswitchingdevice

forexplosiveareas

FlowguardinheattransferoilsystemsincompliancewithDIN32727

andhotwatersystemsaccordingtoVdTÜVInformationsheet"Flow100"

09005342BA_EN_DS21_HST4A09/14

*09005342*

| Masthead FISCHER Mess‐ und Regeltechnik GmbH

2 / 48 BA_EN_DS21_H_ST4‐A

Masthead

Manufacturer: FISCHERMessundRegeltechnikGmbH

Bielefelderstr.37a

32107BadSalzuflen

Telephone:+4952229740

Telefax:+4952227170

eMail:[email protected]

web:www.fischermesstechnik.de

Technicaleditorialteam: Documentationrepresentative:S.Richter

Technicaleditor:R.Kleemann

Allrights,alsothosetothetranslation,reserved.Nopartoftheseinstructions

maybereproducedorprocessed,duplicatedordistributedusingelectronicsys

temsoranyotherform(print,photocopy,microfilmoranotherprocess)without

thewrittenconsentofthecompanyFischerMessundRegeltechnikGmbH,

BadSalzuflen.

Reproductionforinternaluseisexpresslyallowed.

Brandnamesandproceduresareusedforinformationpurposesonlyanddo

nottaketherespectivepatentsituationintoaccount.Greatcarewastaken

whencompilingthetextsandillustrations;nevertheless,errorscannotberuled

out.ThecompanyFISCHERMessundRegeltechnikGmbHwillnotacceptany

legalresponsibilityorliabilityforthis.

Subjecttotechnicalamendments.

©FISCHERMessundRegeltechnikGmbH2014

FISCHER Mess‐ und Regeltechnik GmbH Table of contents

BA_EN_DS21_H_ST4‐A iii

Tableofcontents

1 Safetynotes................................................................................................................................................... 5

1.1 General....................................................................................................................................................5

1.2 PersonnelQualification ...........................................................................................................................5

1.3 RisksduetoNonObservanceofSafetyInstructions..............................................................................5

1.4 SafetyInstructionsfortheOperatingCompanyandtheOperator ..........................................................5

1.5 UnauthorisedModification.......................................................................................................................6

1.6 InadmissibleModesofOperation............................................................................................................6

1.7 Safeworkingpracticesformaintenanceandinstallationwork................................................................6

1.8 Pictogramexplanation.............................................................................................................................6

2 Productandfunctionaldescription............................................................................................................. 7

2.1 Useasintended ......................................................................................................................................7

2.2 Equipmentversions.................................................................................................................................7

2.3 Functiondiagram.....................................................................................................................................9

2.4 Designandmodeofoperation ..............................................................................................................10

3 Installationandassembly .......................................................................................................................... 11

3.1 General..................................................................................................................................................11

3.2 Assembly...............................................................................................................................................11

3.3 Useinzoneswherethereisariskofexplosion ....................................................................................11

3.4 Processconnection ...............................................................................................................................13

3.5 Electricalconnections............................................................................................................................14

4 Commissioning ........................................................................................................................................... 16

4.1 General..................................................................................................................................................16

4.2 Safetyinformation .................................................................................................................................16

4.3 Displayandcontrolelements ................................................................................................................16

4.4 Leadseal...............................................................................................................................................17

4.5 Zeropointcorrection .............................................................................................................................17

4.6 Switchpointsetting ...............................................................................................................................17

4.7 Functiontest..........................................................................................................................................18

5 Maintenance ................................................................................................................................................ 19

5.1 Safetyinformation .................................................................................................................................19

5.2 Wartung(maintenance).........................................................................................................................19

5.3 Transport ...............................................................................................................................................19

5.4 Service ..................................................................................................................................................19

5.5 Accessories ...........................................................................................................................................20

5.6 Disposal.................................................................................................................................................22

6 Technicaldata ............................................................................................................................................. 23

6.1 Inputvariables .......................................................................................................................................23

6.2 Outputparameters ................................................................................................................................23

6.3 MeasuredValueDisplay .......................................................................................................................23

6.4 Electricalconnection .............................................................................................................................23

6.5 Applicationconditions............................................................................................................................24

6.6 Constructiondesign...............................................................................................................................24

6.7 Dimensionaldrawings ...........................................................................................................................25

7 OrderCodes ................................................................................................................................................ 31

Table of contents FISCHER Mess‐ und Regeltechnik GmbH

iv BA_EN_DS21_H_ST4‐A

8 Attachments .................................................................................................................................................33

8.1 ECDeclarationofconformity..................................................................................................................33

8.2 ECdeclarationofconformityATEX........................................................................................................34

8.3 ECtypetestingincompliancewith97/23/EC.........................................................................................35

8.4 Qualityassurancesystemincompliancewith97/23/EC........................................................................36

8.5 ATEXCertificate.....................................................................................................................................37

8.6 EACDeclaration.....................................................................................................................................43

8.7 DINCERTCOCertificationDIN32727:198102.....................................................................................43

8.8 Parttestcurrent100...............................................................................................................................44

8.9 GLCertificate .........................................................................................................................................45

8.10 SILCertificate.........................................................................................................................................46

FISCHER Mess‐ und Regeltechnik GmbH Safety notes | 1

BA_EN_DS21_H_ST4‐A 5 / 48

1 Safetynotes

1.1 General

WARNING Thisoperatingmanualcontainsinstructionsfundamentaltotheinstallation,op

erationandmaintenanceofthedevicethatmustbeobservedunconditionally.It

mustbereadbytheassembler,operatorandthespecializedpersonnelin

chargeoftheinstrumentbeforeitisinstalledandputintooperation.

Thisoperatingmanualisanintegralpartoftheproductandthereforeneedsto

bekeptclosetotheinstrumentinaplacethatisaccessibleatalltimestothe

responsiblepersonnel.

Thefollowingsections,inparticularinstructionsabouttheassembly,commis

sioningandmaintenance,containimportantinformation,nonobservanceof

whichcouldposeathreattohumans,animals,theenvironmentandproperty.

Theinstrumentdescribedintheseoperatinginstructionsisdesignedandmanu

facturedinlinewiththestateoftheartandgoodengineeringpractice.

1.2 PersonnelQualification

Theinstrumentmayonlybeinstalledandcommissionedbyspecializedperson

nelfamiliarwiththeinstallation,commissioningandoperationofthisproduct.

Specializedpersonnelarepersonswhocanassesstheworktheyhavebeen

assignedandrecognizepotentialdangersbyvirtueoftheirspecializedtraining,

theirskillsandexperienceandtheirknowledgeofthepertinentstandards.

WARNING Forexplosionproofmodelsthespecializedpersonnelmusthavereceivedspe

cialtrainingorinstructionorbeauthorizedtoworkwithexplosionproofinstru

mentsinexplosionhazardareas.

1.3 RisksduetoNonObservanceofSafetyInstructions

Nonobservanceofthesesafetyinstructions,theintendeduseofthedeviceor

thelimitvaluesgiveninthetechnicalspecificationscanbehazardousorcause

harmtopersons,theenvironmentortheplantitself.

Thesupplieroftheequipmentwillnotbeliablefordamageclaimsifthisshould

happen.

1.4 SafetyInstructionsfortheOperatingCompanyandtheOperator

Thesafetyinstructionsgoverningcorrectoperationoftheinstrumentmustbe

observed.Theoperatingcompanymustmakethemavailabletotheinstallation,

maintenance,inspectionandoperatingpersonnel.

Dangersarisingfromelectricalcomponents,energydischargedbythemedium,

escapingmediumandincorrectinstallationofthedevicemustbeeliminated.

Seetheinformationintheapplicablenationalandinternationalregulations.

PleaseobservetheinformationaboutcertificationandapprovalsintheTech

nicalDatasection.

Theinstrumentmustbedecommissionedandsecuredagainstinadvertentre

operationifasituationarisesinwhichitmustbeassumedthatsafeoperationis

nolongerpossible.Reasonsforthisassumptioncouldbe:

▪ evidentdamagetotheinstrument

▪ failureoftheelectricalcircuits

▪ longerstorageoutsidetheapprovedtemperaturerange.

▪ considerablestrainduetotransport

1 | Safety notes FISCHER Mess‐ und Regeltechnik GmbH

6 / 48 BA_EN_DS21_H_ST4‐A

Repairsmaybecarriedoutbythemanufactureronly.

AprofessionalsingleconformityinspectionasperDINEN61010,section1,

mustbecarriedoutbeforetheinstrumentcanberecommissioned.Thisin

spectionmustbeperformedatthemanufacturer'slocation.Correcttransport

andstorageoftheinstrumentarerequired.

1.5 UnauthorisedModification

Modificationsoforothertechnicalalterationstotheinstrumentbythecustomer

arenotpermitted.Thisalsoappliestoreplacementparts.Onlythemanufac

turerisauthorisedtomakeanymodificationsorchanges.

1.6 InadmissibleModesofOperation

Theoperationalsafetyofthisinstrumentcanonlybeguaranteedifitisusedas

intended.Theinstrumentmodelmustbesuitableforthemediumusedinthe

system.Thelimitvaluesgiveninthetechnicaldatamaynotbeexceeded.

Themanufacturerisnotliablefordamageresultingfromimproperorincorrect

use.

1.7 Safeworkingpracticesformaintenanceandinstallationwork

Thesafetyinstructionsgiveninthisoperatingmanual,anynationallyapplicable

regulationsonaccidentpreventionandanyoftheoperatingcompany'sinternal

work,operatingandsafetyguidelinesmustbeobserved.

Theoperatingcompanyisresponsibleforensuringthatallrequiredmainten

ance,inspectionandinstallationworkiscarriedoutbyqualifiedspecializedper

sonnel.

1.8 Pictogramexplanation

DANGER Typeandsourceofdanger

Thisindicatesadirectdangeroussituationthatcouldleadtodeathorserious

injury(highestdangerlevel).

a) Avoiddangerbyobservingthevalidsafetyregulations.

WARNING Typeandsourceofdanger

Thisindicatesapotentiallydangeroussituationthatcouldleadtodeathorser

iousinjury(mediumdangerlevel).

a) Avoiddangerbyobservingthevalidsafetyregulations.

CAUTION Typeandsourceofdanger

Thisindicatesapotentiallydangeroussituationthatcouldleadtoslightorseri

ousinjury,damageorenvironmentalpollution(lowdangerlevel).

a) Avoiddangerbyobservingthevalidsafetyregulations.

NOTICE Note/advice

Thisindicatesusefulinformationofadviceforefficientandsmoothoperation.

FISCHER Mess‐ und Regeltechnik GmbH Product and functional description | 2

BA_EN_DS21_H_ST4‐A 7 / 48

2 Productandfunctionaldescription

2.1 Useasintended

Theunitisexclusivelydesignedforthepurposedefinedbythemanufacturerin

thedatasheetoroperatinginstructions.

Theunitissuitableforoperationinpotentiallyexplosiveareas

▪ Zone1and2–Riskfromvapours

▪ Zone21and22–Riskfromdust

Foreveryapplication,therespectiveinstallationinstructionsandtheconditions

laidoutinthesection'Useinexplosiveareas'mustbeobserved.

Differentialpressuremeasuringandswitchingdevice

TheDS21isameasuringandswitchunitformeasuringdifferentialpressure

underdifficultmeasuringconditionssuchas:pressuresurges,vibrations,fre

quentswitchingandhighdemandsontheswitchingoutput.Pleasecontactthe

manufacturerbeforeusingthisunitwithdirtyoraggressivemediabecausethe

unitneedstobeadaptedintermsofthepartsthatcomeintocontactwiththe

media.

Flowassurance

Theunitsinthisseriesareusedasflowguardsinheattranferoilsystemsin

compliancewithDIN32727andhotwatersystemsincompliancewithVdTÜV

informationsheet'Flow100'.Theflowguardscompriseadifferentialpressure

transducer,e.g.ameasuringorifice,thedifferentialpressuremeasuringand

switchunitandshutofffittings.Therespectiveinstallationinstructionsmustbe

observedforthisapplicationcase.AllunitsoftheseriesDS21satisfythesere

quirements.

NOTICE ThetypetestsincompliancewithDIN32727andVdTÜVinformationsheet

"Flow100"onlyapplyinconjunctionwithadifferentialpressuretransducer,not

foradifferentialpressuremeasuringandswitchingdevicealone.

ThesuccessfultypetestoftheseriesDS21wasconfirmedbymeansofthefol

lowingtestsymbols:

▪ forflowguardsincompliancewithDIN32727:

DINCERTCOregistrationnumber1B012/07

▪ accordingtoVdTÜVInformationsheet"Flow100“:

PartcodeTÜV.SW/SB.07–020

2.2 Equipmentversions

TheDS21canbesuppliediwththefollowingdifferentpressurechambers:

▪ Aluminium

▪ Stainlesssteel1.4305

ThealuminiumpressurechamberscanalsobesuppliedwithaHARTCOAT®

coating.Thefollowingshowsthevariousunitversions.

AllcasingshaveprotectionclassIP65.

TheDS21canalsobeusedasapressuremeasuringandswitchunit.The

measurementisarelativepressuremeasurement.Thefollowingillustrationsof

thevariousdevicemodelsarefoundintheleftsideofthedifferentialpressure

devicesandontherightsideofthepressuremeasurementdevices.

2 | Product and functional description FISCHER Mess‐ und Regeltechnik GmbH

8 / 48 BA_EN_DS21_H_ST4‐A

NOTICE Switchpanelinstallation

Pleasenotethattheswitchpointsofdeviceswithbayonetringsneedtobeset

beforemountingthecontrolpanel.Wheninstalled,theunitcannolongerbe

opened.

Pleaseseetheordercodefortheprocessconnectionoptions.

2.2.1 Pressurechamberinaluminium

Pressurechamber Groundconnection

Processconnection

differentialpressure

Assemblyfoot

Processconnection

pressure

Pressureequalisationelement

Processconnection

below

Processconnection

rear

Switchpanelinstallationkit

Electricalconnections

Illustration1:DS21Pressurechamberinaluminium[ATEX]

FISCHER Mess‐ und Regeltechnik GmbH Product and functional description | 2

BA_EN_DS21_H_ST4‐A 9 / 48

2.2.2 Pressurechamberinstainlesssteel

Assemblyfoot

Illustration2:DS21Pressurechamberinstainlesssteel[ATEX]

2.2.3 Electroconnectionvariants

Allunitmodelsaresuppledwithacablesocket.OnlytheGLmodelissupplied

withanadditional3mlongconnectioncable.Theassociatedwiringdiagrams

areshownonthetypeplateandinthesection'Installationandassembly'.

2.3 Functiondiagram

2

1

3

4

5

6

1

7

8

Modelasdifferentialpressuremeasuringandswitchingdevice

Illustration3:DS21Functiondiagramdifferentialpressure[ATEX]

2 | Product and functional description FISCHER Mess‐ und Regeltechnik GmbH

10 / 48 BA_EN_DS21_H_ST4‐A

Modelaspressuremeasuringandswitchingdevice

9

8

Illustration4:DS21Functiondiagrampressure[ATEX]

1 Pressurechamber 2 Motiontrain

3 Tappet 4 Microswitch

5 Switchpointsetting 6 Measuringdiaphragm

7 Measuringsprings 8 Groundconnection

9 Closingplug

2.4 Designandmodeofoperation

Thebasisforthismeasurementandswitchunitisasturdynonsensitivedia

phragmmeasuringunitthatissuitableformeasuringdifferentialpressure,and

overandunderpressure.Theunitusesthesamemeasuringprincipleforall

threemeasuringapplications.

Intheidleposition,thespringforcesareequalisedonbothsidesofthemeasur

ingdiaphragm.Thepressurethatistobemeasuredorthedifferentialpressure

createsaonesidedforceonthemeasuringdiaphragmthatmovesthedia

phragmsystemagainstthemeasuringrangespringsuntilthespringforcesare

equalised.Inthecaseofoverload,themeasuringdiaphragmissupportedby

metalliccontactsurfaces.

Acentraltappettransfersthemovementofthediaphragmsystemontothedis

playmechanismand,atthesametime,ontotheactuationelementsofthemi

croswitches.Theswitchpointsaresetviathesettingscrewsandrefernec

valuescale.

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BA_EN_DS21_H_ST4‐A 11 / 48

3 Installationandassembly

3.1 General

Theinstrumentmayonlybeinstalledandcommissionedbyspecializedperson

nelfamiliarwiththeinstallation,commissioningandoperationofthisproduct.

Specializedpersonnelarepersonswhocanassesstheworktheyhavebeen

assignedandrecognizepotentialdangersbyvirtueoftheirspecializedtraining,

theirskillsandexperienceandtheirknowledgeofthepertinentstandards.

Ifunitsareusedinpotentiallyexplosiveareas,thepersonnelmustreceiveaddi

tionaltrainingorbriefingsorhaveapermittoworkionexplosionprotectedunits

inpotentiallyexplosivesystems.

3.2 Assembly

Thestandardunitisdesignedforwallmounting.Thisisaccomplishedusingthe

rearattachmentplatethatactsasamountingfoot.

Acontrolpanelinstallationsetcanbeorderedforeachunitthatallowedinstall

ationonthefrontoftheunit.

Theunitcanbeorderedforuseasapressure,measuringandswitchunit;itis

designedfordirectmounting.Thisisaccomplishedusingaconnectionadapter

thatiseithermountedbewlotheunitorontherearwall.Wallmountingisnot

possibleifthereisarearconnectionadapter.

Theunitissetforverticalinstallationexworks.Onlythisinstallationpoistionis

allowed.Toensuresafetyduringinstallationandmaintenance,werecommend

installingasuitableshutoffvalveonthesystem.

WARNING Installationregulations

Duringinstallationandmounting,theapplicationspecificinstallationguidelines

intherespectiveapprovalsintheappendixmustbesatisfied.

WARNING Fallingobjects

Theoperatormustensurethatanyfallingobjectscannotcollidewiththein

stalledunit.Stepsmustbetakentoprevent

üsparksbeinggeneratedonimpact.

ütheprotectionclassofthecasingisnolongerguaranteed.

a) Thiscanbeavoidedbyattachingprotectivecover,

b) aprotectivecasingor

c) asimilarelement.

3.3 Useinzoneswherethereisariskofexplosion

3.3.1 Applicationareas

Zone1and2–Riskfromvapours

▪ Ordercode:

DS21###########H

▪ Identification:

II2GExibcIICT6Gb

3 | Installation and assembly FISCHER Mess‐ und Regeltechnik GmbH

12 / 48 BA_EN_DS21_H_ST4‐A

▪ Certificatesanddeclarations:

CEdeclarationofconformityforequipmentofcategory2

ECExaminationCertificate94/9/EC

(TÜV06ATEX2964)

Zone21and22–Riskfromconductivedust

▪ Ordercode:

DS21###########H

▪ Identification:

II2DtbcIIICT70°CDb

▪ Certificatesanddeclarations:

CEdeclarationofconformityforequipmentofcategory2

ECExaminationCertificate94/9/EC

(TÜV06ATEX2964)

3.3.2 Authorizedtemperatures

▪ Permissibleambienttemperature:10°C≤Tamb≤60°C

▪ Allowedmediumtemperatureinthedifferentialmeasurementinstrument:

60°C.

X

Differential

pressureline

Shutoffvalve Medium

T=300°C

T=60°C

Illustration5:DS21MMeasure

mentsetup

Dependingonthesystem,themediamayreachtemperaturesof>60°C.No

mediaflowsthroughthepressuredifferentiallinesbetweenthepressurediffer

entialtransducerandthedifferentialpressuremeasuringandswitchunit.When

settingthelengthofthedifferentialpressurelines,atemperaturedropiscre

atedthatcanreducethemediatemperaturetotheallowed60°Cintheunit.The

mediatemperaturedropsbyapprox.50Kforevery100mmofdifferentialpres

sureline(pipe6x1).

Theallowedlengthofthedifferentialpressureline(x)mustbeatleast500mm

incompliancewithDIN32727.

Thislinereducesthemediatemperatureof300°Ctotheambienttemperature

beforeitreachestheunit.Ifthemediatemperatureishigher,longerdifferential

pressurelinesarerequired.

Thedesignofthedifferentialpressurelineistheresponsibilityofthesystem

manufacturer.

WARNING Temperatureclass

TheoperatorandsystemmanufacturermustobservethetemperatureclassT1

…T6thatdependsonthemediatemperatureandthemaximumallowedsur

facetemperatureT70°Cfortherespectiveapplication.

WARNING Pulsatingdifferentialpressures

Inthecaseofgaseousmedia,compressionheatthatcanbecreatedviapulsat

ingdifferentialpressurescanleadtoainincreaseinthetemperatureofthecas

ing.Forsafetyreasons,thepulsefrequencyof0.2Hzmaynotbeexceeded.At

thisfrequencyandadifferentialpressurechangebetween10and90%ofthe

measuringrange,thetemperaturerisesbylessthan3°C.

Themaximumsurfacetemperature70°Cwasdeterminedunderthefollowing

conditionswithoutdustaccumulationandsafetyfactor.

üAmbienttemperature:60°C

üMediumtemperatureintheinstrument:60°C

üPulsefrequency:<0.2Hz

a) Thistheseapplicationcases,thepressurechangespeedmustbethrottled,

e.g.bymeansofcapillarythrottles.

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BA_EN_DS21_H_ST4‐A 13 / 48

WARNING Sunlight

Inordertoavoidadditionalheating,theinstrumentsmaynotbeexposedtodir

ectsunlightduringoperation.

WARNING Isolation

Thedifferentialpressurelinesmaynotbeinsulated.

3.4 Processconnection

▪ Byauthorizedandqualifiedspecializedpersonnelonly.

▪ Thepipesneedtobedepressurizedwhentheinstrumentisbeingconnec

ted.

▪ Appropriatestepsmustbetakentoprotectthedevicefrompressuresurges.

▪ Checkthatthedeviceissuitableforthemediumbeingmeasured.

▪ Maximumpressuresmustbeobserved(cf.Tech.data)

Illustration6:Differentialpres

sureconnection

Thedifferentialpressureconnectionsaremarkedwith(+)and()symbolson

thedevice.Thedifferentialpressureconnectionlinesmustbemountedaccord

ingtothesesymbols.

▪ (+)Higherpressure

▪ ()Lowerpressure

Unitsdesignedapressuremeasuringandswitchunits(codeD),onlyhaveone

connectionadapteronthe(+)side.Thisislocatedontherearorbelowtheunit

dependingontheassemblytype.

Connectingshanks

rear

below

Illustration7:Dischargeport

Thedifferentialpressurelinesmustbeinstalledataninclinationsothatwhen

fluidsaremeasurednoairpocketsarecreatedorwhenmeasuringgases,no

waterpocketsarecreated.Iftherequiredinclinationisnotreached,waterorair

filtersmustbeinstalledatsuitableplaces.

Thedifferentialpressurelinesmustbekeptasshortaspossibleandinstalled

withoutanytightbendstoavoiddelays.

Inthecaseoffluidmeasuringmedia,thedifferentialpressurelinesmustbe

ventedbecausedifferentfluidcolumnsinthelineswilldistortthemeasure

ments.

Ifwaterisusedasameasuringmedium,theunitmustbeprotectedagainst

frost.

3.4.1 Installationregulationsforflowguardsinheattransferunitsin

compliancewithDIN4754

InthecaseofdifferentialpressuretransducersincompliancewithDIN1952/

VDI2041,themeasurementmustbesetupincompliancewithVDE/VDI3512,

sheet1.

Shutoffvalvesindifferentialpressurelinesmayonlybeactivatedwithtools.

Threadedscrewconnectionsintheselinesmustbedesignedsothattheyre

maintightwithoutanysealingagent,ortheconnectionmustbeweldedorhard

soldered.

Thecleardiameterandlengthofdifferentialpressurelinesmustbedimen

sionedsothatwenthelineiscold(approx.20°C),theresponsetimeoftheunit

isnolongerthan5sec.

Differentialpressurelinesmustbemadeofmetal.Theirclearwidthmaynotun

dercut4mmandthestretchedlengthmustbeatleast500mm.Ifarrangedwith

blockvalves,thedifferentialpressurelinebetweenthevalveblockanddifferen

tialpressuretransducermustbeatleast500mm.

3 | Installation and assembly FISCHER Mess‐ und Regeltechnik GmbH

14 / 48 BA_EN_DS21_H_ST4‐A

Lockingandunlockingconditionsmustbeensuredduringinstallationviathe

followingelectricallines.

3.4.2 Installationregulationsforflowlimitersinsteamboilersandhot

watersystems

DifferentialpressuretransducersincompliancewithDIN1952/VDI3212,sheet

1,ItabaorAnnubarprobesmustbeusedasmeasuringelements.Ifadifferen

tialpressuretransducersincompliancewithDIN1952/VDI2041isused,the

measurementmustbesetupincompliancewithVDE/VDI3212,sheet1

Itmustbepossibletoblockthedifferentialpressurelineswitha5xvalveblock

infrontofthedifferentialpressureunitandmustbedesignedtoallowblowout.

Shutoffvalvesindifferentialpressurelinesmayonlybeactivatedwithtools.

Threadedscrewconnectionsintheselinesmustbedesignedsothattheyre

maintightwithoutanysealingagent,ortheconnectionmustbeweldedorhard

soldered.

Thedifferentialpressurelinesmustbemadeofmetalandhaveaclearwidthof

atleast8mm.Thestretchedlengthofthedifferentialpressurelinesmustbeat

least500mm.

3.5 Electricalconnections

▪ Byauthorizedandqualifiedspecializedpersonnelonly.

▪ Whenconnectingtheunit,thenationalandinternationalelectrotechnical

regulationsmustbeobserved.

▪ Disconnectthesystemfromthemains,beforeelectricallyconnectingthe

device.

▪ Installtheconsumeradaptedfuses.

▪ Donotconnecttheconnectorifstrained.

WARNING Operationinareasatriskofexplosion

Ifoperatedinexplosiveareas,theelectricaldataoftheunitandthevalidlocal

regulationsandguidelinesfortheinstallationandoperationofelectricalsystems

inexplosiveareasmustbeobserved(e.g.DINEN6007914)

Intrinsicallysafepowercircuits

Foruseinareasatriskofexplosion,thedevicemustbeconnectedtocertified,

intrinsicallysafepowercircuits.Thevaluehighestvaluesare:

max.voltage Ui= 30V

max.current Ii= 160mA

max.output Pi= 800mW

Theeffectiveinnerinductivitiesandcapacitiesarenegligible.Recommended

isolatingdevicesarestatedintheaccessoriessection.

Cablesocket

No Contact Switch

1 Makecontact NO

Switch1

2 Breakcontact NC

3 Joint COM

4 Joint COM

Switch2

5 Makecontact NO

6 Breakcontact NC

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BA_EN_DS21_H_ST4‐A 15 / 48

No Contact Switch

Groundconnection

Lidscrew

Lid

Seal

Middlepart

Connectionterminals

Pressurescrew

Pressurewasher

Cuttingring

Clampingring

Groundterminal

Seal (viewfromabove)

Illustration8:Cablesocket

Formodelswithnumberedcables,thecablenumberscorrespondwiththe

presentedterminalnumbers.

GLversion

Inmodelswithoneswitch,acable(0.6/1KV4Gx1.5)withthefollowingcolor

codeisconnected:

Ter

minal

WireID

1 grey

2 brown

3 black

green/yellow

Inmodelswithtwoswitches,acable(0.6/1KV7Gx1.5)withnumbersforidenti

fyingthewiresmustbeconnected.Thenumbersofthecablecorrespondtothe

terminalnumbersofthecablesocket.

Outergroundterminal

Illustration9:Groundconnection

Theoutergroundconnectionmustalwaysbeconnectedtotheprotectivepo

tentialequalisationorasimilarlocalpotentialequalisation.Theconnectionis

suitableforconnectingfinewireconductorsupto4mm2orsinglewireconduct

orsupto6mm2.

4 | Commissioning FISCHER Mess‐ und Regeltechnik GmbH

16 / 48 BA_EN_DS21_H_ST4‐A

4 Commissioning

4.1 General

Theinstrumentmayonlybeinstalledandcommissionedbyspecializedperson

nelfamiliarwiththeinstallation,commissioningandoperationofthisproduct.

Specializedpersonnelarepersonswhocanassesstheworktheyhavebeen

assignedandrecognizepotentialdangersbyvirtueoftheirspecializedtraining,

theirskillsandexperienceandtheirknowledgeofthepertinentstandards.

Ifunitsareusedinpotentiallyexplosiveareas,thepersonnelmustreceiveaddi

tionaltrainingorbriefingsorhaveapermittoworkionexplosionprotectedunits

inpotentiallyexplosivesystems.

Aprerequisiteforcommissioningiscorrectinstallationofallelectricalsupply

linesandthedifferentialpressurelines.Allconnectionsarearrangedsothat

therearenomechanicalforcesactingonthedevice.

CAUTION Leaktest

Thedifferentialpressurelinesneedtobecheckedforleaksbeforecommission

ing.

4.2 Safetyinformation

Theinstrumentmustbedecommissionedandsecuredagainstinadvertentre

operationifasituationarisesinwhichitmustbeassumedthatsafeoperationis

nolongerpossible.

Reasonsforthisassumptioncouldbe:

▪ Evidentdamagetotheinstrument

▪ Failureoftheelectricalfunction.

▪ Storageintemperaturesover85°Cforalongperiod.

▪ Considerablestrainduetotransport

WARNING Recommissioning

AprofessionalsingleconformityinspectionasperDINEN61010,section1,

mustbecarriedoutbeforetheinstrumentcanberecommissioned.Thisinspec

tionmustbeperformedatthemanufacturer'slocation.Correcttransportand

storageoftheinstrumentarerequired.

Repairsmaybecarriedoutbythemanufactureronly.

4.3 Displayandcontrolelements

Theillustrationshowsanexamplebecausethemeasurementscaleandthere

forealsothereferencevaluescaledependontherespectivemeasuringrange.

Thepositionandformofthecontrolelementsareatleastsimilartotheillustra

tion.

FISCHER Mess‐ und Regeltechnik GmbH Commissioning | 4

BA_EN_DS21_H_ST4‐A 17 / 48

Switchpointsetting

Switch1

Switchpointsetting

Switch2

Settingscrewforthe

zeropointcorrection

Standard

valuescale

MeasurementscaleMeasurementdisplay

Illustration10:Controlelements[DS21]

4.4 Leadseal

Itispossibletosecuretheunitagainstremovalandadjustmentoftheswitch

pointsbymeansofaleadseal.Thissealmaynotberemoved.Thedevicecan

besealedonsiteorexworks.Inthelattercase,thedeviceissuppliedwitha

presetting.Afterthis,itisnolongerpossibletoadjusttheswitchpointsettingor

correctthezeropoint.

4.5 Zeropointcorrection

1. Loadthepressuechamberwiththeexistingstaticsystempressure.

2. Opentheunitbyremovingthebayonetringandthefrontdisk.Usea

wrenchtomountorremovethebayonetringtopreventdamagetothecas

ing.

3. Setthemeasurementdisplaywiththesettingscrewforcorrectingthezero

pointtothezeropointofthemeasurementscale.

4. Closetheunit.

4.6 Switchpointsetting

1. Opentheunitbyremovingthebayonetringandthefrontdisk.Usea

wrenchtomountorremovethebayonetringtopreventdamagetothecas

ing.

2. Useascrewdrivertosettherequiredswitchpointsincompliancewiththe

markingsonthestandardvaluescale.

3. Closetheunit.

4 | Commissioning FISCHER Mess‐ und Regeltechnik GmbH

18 / 48 BA_EN_DS21_H_ST4‐A

NOTICE Settingaccuracy

Theachieveablesettingaccuracywiththestandardvaluescaleis±5%.

Ahigherlevelofprecisioncanonlybeachievedusingsuitableunitssuchas

testmanometers,ohmmetersetc.Optionally,thesedevicescanbepreinstalled

exworks.

4.7 Functiontest

Opentheunitbyremovingthebayonetringandthefrontdisk.Useawrenchto

mountorremovethebayonetringtopreventdamagetothecasing.

Iftheunithastwoswitchpoints,thestatedteststepsmustbecarriedoutfor

bothswitches.

Afterthetest,theswitchpointsneedtobereset(seeabove).

NOTICE Leadseal

Itispossibletosecurethebayonetringagainstremovalbymeansofalead

seal.Thissealmaynotberemoved.Afunctiontestcanonlybecarriedoutin

thiscasebysettingtheoperatingpressure(seebelow).

4.7.1 Checkingtheswitchpointsinadepressurizedstate

Nomeasurementisshownandthemeasurementdisplaypointtozero.

Turntheswitchpointsettingbuttontowardthezeropointuntilthemicroswitch

isactivated.

4.7.2 Checkingtheswitchpointswhenthesystemisoperational

Ameasurementisshown.Ifdespiteoperationalpressure,nomeasurementis

shown,youcangenerateadifferentialpressurebyblockingthedifferential

pressurelineononeside.

Turntheswitchpointsettingbuttontowardthemeasurementuntilthemicro

switchisactivated.

4.7.3 Checkingtheswitchpointsbychangingtheoperartionalpressure

Iftheunitissealedortheswitchpointsettingcannotbechangedforanyother

reason,youcancarryoutafunctiontestbychangingtheoperationalpressure.

Setthedifferentialpressuresothatthemicroswitch(es)areactivated.

FISCHER Mess‐ und Regeltechnik GmbH Maintenance | 5

BA_EN_DS21_H_ST4‐A 19 / 48

5 Maintenance

5.1 Safetyinformation

Theinstrumentmustbedecommissionedandsecuredagainstinadvertentre

operationifasituationarisesinwhichitmustbeassumedthatsafeoperationis

nolongerpossible.

Reasonsforthisassumptioncouldbe:

▪ Evidentdamagetotheinstrument

▪ Failureoftheelectricalfunction.

▪ Storageintemperaturesover85°Cforalongperiod.

▪ Considerablestrainduetotransport

WARNING Recommissioning

AprofessionalsingleconformityinspectionasperDINEN61010,section1,

mustbecarriedoutbeforetheinstrumentcanberecommissioned.Thisinspec

tionmustbeperformedatthemanufacturer'slocation.Correcttransportand

storageoftheinstrumentarerequired.

Repairsmaybecarriedoutbythemanufactureronly.

5.2 Wartung(maintenance)

Theunitismaintenancefreeapartfromregularcleaningofthesurfaceofthe

casing.

WARNING Dustdeposits

Thecasingoftheunitmustbecleanedregularlywithadampclothtoprevent

heataccumulation,asthiscanleadtothesurfaceoversteppingthemaximum

allowedtemperature(T70°C).Thecleaningfrequencydependsontheamount

ofdustinthelocation.

Toensurereliableoperationandalongservicelife,werecommendcarryingout

thefollowingtestonaregularbasis:

▪ Checkthereading.

▪ Checkingtheswitchfunctioninconnectionwiththedownstreamcompon

ents.

▪ Checkingthedifferentialpressurelinesforleaks.

▪ Checkingtheelectricalconnections(terminalconnectionofthecable).

Theprecisetestcyclesandoperatingandambientconditionsneedtobeadjus

ted.Ifseveralcomponentsoftheunitinteract,alloperatinginstructionsofthe

otherunitsalsoneedtobeobserved.

5.3 Transport

Themeasuringdevicemustbeprotectedagainstimpacts.Itshouldbetrans

portedintheoriginalpackagingorasuitabletransportcontainer.

5.4 Service

Alldefectiveorfaultydevicesshouldbesentdirectlytoourrepairdepartment.

Pleasecoordinateallshipmentswithoursalesdepartment.

5 | Maintenance FISCHER Mess‐ und Regeltechnik GmbH

20 / 48 BA_EN_DS21_H_ST4‐A

WARNING Processmediaresidues

Processmediaresiduesinandondismantleddevicescanbeahazardto

people,animalsandtheenvironment.Takeadequatepreventivemeasures.If

required,thedevicesmustbecleanedthoroughly.

Returnthedeviceintheoriginalpackagingorasuitabletransportcontainer.

5.5 Accessories

Recommendedisolatingunitamplifier

AllisolatingamplifiersstatedbelowareformountingonTS35rails.

▪FFA6SR2Ex1.W

Art.No.05003042

– 230VAC±10%

– 1channel

– ControlpowercircuitEExiaIIC

– Reversibledirectionofaction

– 1relayoutpoutwith1converter

– LB/LKmonitoring

– CanbeuseduptoSIL2incompliancewithIEC61508

▪KFASR2Ex2.W

Art.No.05003043

– 230VAC±10%

– 2channel

– ControlpowercircuitEExiaIIC

– Reversibledirectionofaction

– 2relayoutputswith1converterperchannel

– LB/LKmonitoring

– CanbeuseduptoSIL2incompliancewithIEC61508

▪TS500Exia1R5

Art.No.05003065

– 24VDC±15%

– 1channel

– Controlpowercircuitintrinsicallysafe

ATEXII(1)G[Exia]IIC/IIB

ATEXII(1)D[ExiaD

– Reversibledirectionofaction

– 1relayoutpoutwith1converter

– LB/LKmonitoring

▪TS500Exia2R5

Art.No.05003066

– 24VDC±15%

– 1channel

– Controlpowercircuitintrinsicallysafe

ATEXII(1)G[Exia]IIC/IIB

ATEXII(1)D[ExiaD

– Reversibledirectionofaction

– 2relayoutputswith1converterperchannel

– LB/LKmonitoring

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Fischer DS21xxxH series Operating instructions

Brand: Fischer

Model: DS21xxxH series

Type: Operating instructions

This manual is also suitable for

DS21

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