2. Fischer
  3. DS21xxxH series

Fischer DS21xxxH series, DS21 Operating instructions

  • Hello! I've reviewed the FISCHER DS21 H Operating Manual, a document detailing the installation, operation, and maintenance of this differential pressure measuring and switching device designed for use in explosive areas. It covers crucial safety information related to its use as a flow guard in heat transfer oil and hot water systems, as well as key features like its sturdy diaphragm design and adjustable switch points. I'm ready to assist you with your questions about this device.
  • What type of areas is the device suitable for?
    What are the maximum values for Intrinsically safe power circuits?
    Can I modify this device?
    What is the recommended minimum length for differential pressure lines?
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.
FISCHER Mess‐ und Regeltechnik GmbH Installation and assembly | 3
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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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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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