Prosense P Series User manual
PRS‐UM
‐P‐EN‐Rev.0
PR
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
WARNING!
This manual must be carefully read by all persons who have or will have the
responsibility for installing, using or servicing this product.
Like any equipment, this product will perform as designed only if installed,
used and serviced in accordance with the manufacturer’s instructions.
Otherwise, it could fail to perform as designed and persons who rely on this
product for their safety could suffer severe personal injury or death.
The warranties made by Prosense with respect to this product are voided if the
product is not installed, used and serviced in accordance with the instructions
in this user guide. Please protect yourself and other by following them.
ImportantRemark
Thedetectorhasbeenfactory‐testedbeforedelivery,thecommissioning
afterinstallationmustincludethezero‐andspan‐adjustment.The
commissioninghastobeterminatedbyafunctiontestofthecompletegas
detectionsystem.
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
Contents
ForYourSafety...........................................................................................................................................4
StrictlyfollowtheInstructionsforUse...............................................................................................4
Maintenance......................................................................................................................................4
Useinareassubjecttoexplosionhazards.........................................................................................4
Liabilityforproperfunctionordamage.............................................................................................4
IntendedUse......................................................................................................................................4
Introduction................................................................................................................................................6
Detectorbody.............................................................................................................................................7
SensorHead:..............................................................................................................................................7
Installation:.................................................................................................................................................8
Mountingthedetector:..............................................................................................................................9
Electricalconnections...............................................................................................................................10
Cabling......................................................................................................................................................11
Detectorgrounding..................................................................................................................................12
Defaultconfiguration...............................................................................................................................13
DetectorConfiguration.............................................................................................................................14
4‐20mAoutput:.......................................................................................................................................14
DetectorRS485serialcommunication:....................................................................................................14
DetectorRelaymodule:............................................................................................................................16
SystemStatus...........................................................................................................................................18
Firsttimeswitchon(Commissioning)..................................................................................................18
Calibration................................................................................................................................................19
Maintenance............................................................................................................................................20
Proactivemaintenance:........................................................................................................................20
OperationalLife:...................................................................................................................................20
Servicing...............................................................................................................................................21
Sensorreplacement:............................................................................................................................21
Sinterreplacement:..............................................................................................................................21
Sensorheadreplacement:...................................................................................................................21
Generalspecification................................................................................................................................22
Warrantystatement.................................................................................................................................23
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
For Your Safety
EnsurethatthisOperatingManualisreadandunderstoodBEFOREinstalling/operating/
maintainingtheequipment.PayparticularattentiontoWarningsandCautions.Alldocument
Warningsarelistedhereandrepeatedwhereappropriateatthestartoftherelevant
chapter(s)ofthisOperatingManual.Cautionsappearinthesections/sub‐sectionsofthe
documentwheretheyapply.
Strictly follow the Instructions for Use
Anyuseofthedetectorsrequiresfullunderstandingandstrictobservationofthese
instructions.Thedetectorisonlytobeusedforpurposesspecifiedhere.
Maintenance
ItisrecommendedtoobtainaservicecontractProsensetocarryoutallrepairs.Only
authenticProsensesparepartsshouldbeusedformaintenance.Pleasecheck“Maintenance”
sectionformoredetails.
Use in areas subject to explosion hazards
Equipmentorcomponentswhichareusedinpotentiallyexplosiveatmospheresandhave
beentestedandapprovedaccordingtointernationalorEuropeanregulationsmaybeused
onlyundertheconditionsspecifiedhere.Modificationsofcomponentsortheuseoffaultyor
incompletepartsarenotpermitted.Incaseofrepairsofequipmentorcomponents,the
nationalregulationsmustbeobserved.
Liability for proper function or damage
Theliabilityfortheproperfunctionofthedetectorisirrevocablytransferredtotheowneror
operatortotheextentthatthedetectorisservicedorrepairedbypersonnelnotemployedor
authorizedbyProsenseorifthesensingheadisusedinamannernotconformingtoits
intendeduse.Prosensecannotbeheldresponsiblefordamagecausedbynon‐compliance
withtherecommendationsgivenabove.Thewarrantyandliabilityprovisionsofthetermsof
saleanddeliveryofProsensearelikewisenotmodifiedbytherecommendationsgivenabove.
Intended Use
ThePseriesdetectorsareintendedtobeusedforstationary,continuousmonitoringfor
combustiblegas/airorvapour/airmixturesbelowtheLowerExplosionLimit(LEL)resp.below
10%oftheLELunderatmosphericconditions.Thedetectorsaremarkedbythedevice
categoriesII2G.Thuscanbeoperatedinhazardousareaswithpotentiallyexplosive
atmospheresofzones1and2.Thetypeofprotectionforgasexplosionprotectionaccording
todevicecategory2(zones1or2)isflameproofenclosureandincreasedsafety,"d".The
enclosureprotectionisIP65.
AccordingtotheATEXDirective2014/34/EUthedetectorisanassemblyconsistingofthree
components(SensorHead,enclosureandcablegland),whereallthesethreecomponentsare
typeapprovedaccordingtoATEXDirective2014/34/EUandmarkedbythedevicecategoryII
2G.Thusthisdetectorissuitabletobeoperatedinhazardousareaswithpotentiallyexplosive
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
atmospheresofzone1andzone2.ThePseriesdetectorscomprisesagassensortypeEx‐
proof(protectiontypeflameproofenclosuredtype).Itmustnotbeoperatedatambient
temperatureslowerthan–20(°C).Themaximumambienttemperatureis50(°C)for
temperatureclassT6.
Nottobeusedinoxygenenrichedatmospheres
InconjunctionwiththecentralcontrollersProsensedetectorswithpreadjusted
alarmthresholdsaudibleandvisiblealarmdevicesorautomaticcountermeasures
canbeactivatedbeforethedetectedgasesorvapourscanformdangerous
flammableortoxicmixtureswithair.
Pleasebealertedinfollowingspecialconditionsmayhaveimpactonmeasuringfunctiondue
tothenatureofmeasuringmethod:
1.Veryhighgasconcentrations
InfraredandPellistorsensorsusedtodetectflammableandtoxicgases.Themeasuring
methodbasedonheatproducedbyreactiononthecatalyticoxidationofaflammablegas
whenpellistorsensorused.Incaseofhighgasconcentrationsthereisnotenoughoxygenin
thesensortoperformoxidationprocesscorrectly.Hencethemeasuringsignaldecreasesat
highgasconcentrationsandevencanleadtomeasuringsignalwithinthemeasuringrange
again.Aconnectedcontrollermustbeoperatedwithalarmdevices,outputs,andalarm
thresholdsoperatingaslatchedifthemeasuringrangeisexceeded.Inthiscasedonotreset
latchingalarmswithouthavingensuredasafeconditionbymeansofanindependentgas
concentrationsmeasurement.
2.Minimumoxygenconcentration
Themeasuringprincipleofheatofreactionneedsaminimumoxygenconcentrationof12%
byvol.,otherwisethemeasuringvalueswillbetoolowbecauseofoxygendeficiency.
3.Long‐termgassingwithmethaneatverylowtemperatures
IftheProsensePseriesflammablegasdetectorsareoperatedapplyingwithmethaneatvery
lowtemperatures,themeasuringsignalatlongtermexpositionmaydecreaseafteralarm
activationandmayleadtomisinterpretation.
Ifagasalarmoccurs,necessaryactionsneedtobetakenimmediately.Thedecreaseofthe
measuringsignalshouldnotmeanthatthegasconcentrationhasbeendecreased.We
recommendtokeepalarmsontheassociatedcontrollersandnottoresetthesealarms
withoutperformingmeasurementwithanindependentgazdetectorstomakesure
conditionsaresafe.
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
Introduction
TheProsensecomprisesagasdetectorbodyandachoiceofsensorsheadsfordetecting
flammablegas,toxicgasandoxygen.TheconstructionofProsenseallowsittobeusedin
hazardousarealocations;itmayalsobeusedinotherareasnotclassifiedashazardous.
Prosensedetectorscanbeconfiguredwithawiderangeofdifferentsensorsmaybeusedto
detectabroaderrangeoftargetgases.Thedetectorcanbeconfiguredwithoptionalrelay
boardfeaturesthreeprogrammablerelaysforcontrollingexternalequipmente.g.alarms,
sirens,valvesorswitches.Thedetectorprovidesanindustrystandard3‐wire,4‐20mAsource
orsinkoutputforconnectiontoadedicatedgasdetectioncontrolsystemorPLC.
Prosensedetectorscomprisesofthemainpartsasshownbelow:
Diagram1:Explodedview
Cover
Body
Mountingplate
Lockinggrubscrew
Fieldcableentriesx2
Sensorheadsocket
Sensorheadbody
Sensorholder
Sinter
Sensorheadcab
Sinternut
Lockinggrubscrew
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
Detector body
Thedetectorenclosurehasthreethreadedentries.Thetwocableentrieseithersideofthe
upperpartofthetransmitterhousingareforconnectingthepowersource,signaloutput
andrelaycontactstoassociatedsignallingequipment.Thebottomentryallowsdirect
connectionofthesensorsocket.Thereisamountingplateincorporatedintothetransmitter
housingallowingforvariousmountingconfigurationoptions.
Diagram2:DetectorbodyandSensorHeadcomponents
1:Sensorheadbody
2:Sensorholder
3:Sensorheadcap
4:Sinternut
5:Sinter
6:Junctionbox–Detectorbody
7:Wallmountingadapter
8:Junctionboxcover
Sensor Head:
TheProsensesensorheaddesignedtodedectflammable,toxicgaeseandoxygen.Theymay
includeNDIRinfrared,pellistororelektrocjemicalsensorsdependingofthetargetgasand
range.
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
Installation:
Gasdetectorsshouldbemountedwhereapotentialhazardofgasismostlikelytobe
present.Thefollowingpointsshouldbenotedwhenlocatinggassensors.
Whenlocatingdetectorsconsiderthepossibledamagecausedbynaturaleventse.g.
rainorflooding.
Considereaseofaccesstothegasdetectorforfunctionaltestingandservicing.
Considerhowescapinggasmaybehaveduetonaturalorforcedaircurrents.
Note:Theplacementofgasdetectorsshouldbedeterminedfollowingtheadviceofexperts
havingspecialistknowledgeofgasdispersion,expertshavingknowledgeoftheprocessplant
systemandequipmentinvolved,safetyandengineeringpersonnel.Theagreementreached
onthelocationofdetectorsshouldberecorded.
Eachgashasdifferentnaturedependingontheirdensity.Thedensityofwhichislowerthan
air,suchashydrogen,methaneorammoniathesensorheadmustbelocatedabovea
possibleleakoratthehighestpointsatwhichmajorconcentrationsofgasmaybefound.
Thegasesandvapourswithadensitygreaterthanair,thesensorheadmustbeinstalled
beneathapossibleleakoratthelowestpointsatwhichsuchgasesandvapoursmaybe
present.
Prosensemayprovidecableglandtogetherwithdetectorinregardstocustomerrequests.
ThecableglandprovidedbyProsensehasATEXcertificationandprovidesatleastIP65level
protection.Thecableglandsareonlysuitableforfixedinstallations.Cablesshallbe
effectivelyclampedtopreventpullingortwisting.Toprovidenecessaryprotectioncable
glendcouplingshouldbefixedwith20Nmtorquewhenusedwiththreesealings;18Nm
whenusedwithtwosealings;16Nmwhenusedwithonesealing.Itisthefinal
assamblers/usersresponsibilitytoensurethethreadedjointbetweencableglandandthe
enclosuremeetalltherequirementsoftheapplicablestandartsfortheassembly.Cable
glandsealingsaresuitableforthecirculartypecables.Ifothershapedcableswillbeusedthe
sealingsshouldbereplacedwithsuitableones.ThecableglandsprovidedbyProsenseare
suitabletousetemperaturerangeinwhichdetectorworks.
Prosensemayprovideplugsandadaptorstogetherwithdetectorinregardstocustomer
requests.TheplugsandadaptorsprovidedbyProsensehaveATEXcertificationandprovides
atleastIP65levelprotection.Thesepartsshouldbemountedtodetectorbodyinsuchaway
thataccidentalrotationorlooseningwillbeprevented.Itisthefinalassamblers/users
responsibilitytoensurethethreadedjointbetweenfittingandtheenclosuremeetallthe
requirementsoftheapplicablestandartsfortheassembly.Foradaptorsandplugswith
nominalsizeofthreadequalorlowerthan25mmaliminiumalloyshallnotbeused.Only
oneadaptorspermittedforeachcableentry;plugsshallnotbeusedwithadaptors.The
plugsandadaptorsprovidedbyProsensearesuitabletousetemperaturerangeinwhich
detectorworks.
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
Mounting the detector:
Thedetectorshouldbemountedverticallyasthesensorheadpointingdownwards.Detector
hastobemountedsuchthatthesensor'sgasentrancearea.
Theinstalllocation
shouldbeisolatedfromvibration,directsunlightandhavetemperaturestability
avoidedexternalinfluencessuchassplashingwater,oil,corrosiveaerosols
shouldhaveatleast30cmfreespacebeneaththesensorheadtoprovide
accessibilityforcalibrationwork.
shouldbeinairflowbetweenpossibleleakorcollectionpointandpossiblesourceof
ignition.
Prosensedonotrecommendtoinstalldetectorsto:
directlyaboveacookingunit,
directlyaboveasinkunit,
closetoanextractorunit,
outdoorwithoutprotectionagainsttherain,
inplaceswheretemperatureisoutsidetheadmissibleoperatingrange,
incorrosiveenvironments,
insideairvents.
inenvironmentswheresiliconcanbefound.
TheProsensedetectorhasanindependentmountingplateconsistingoftwomountingholes
andtwoholestoattachtodetectorbody.Themountingplatecanbeadjustableontwo
diagonalwayontodetectorbody.Thedetectormaybefixeddirectlytoasurfacemounting.
Followbelowstepstomountthedetector:
1‐ Decidewhichdiagonalwaytouseandadjustmountingplateondetectorbodyif
necessary.
2‐ Checkandmakesuremountingplateiscompletelyfixedtodetectorbody
3‐ Mountthedetectortothesurfaceviausingtwooutermountingholesonmounting
plate.
Diagram3:Detectormountingplate
Wallmountingholes
Detectorbodymountingholes
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PRS‐UM‐P‐EN‐Rev.01‐08.2018
Themountingplateinstalledinbelowpositionatfactory:
Diagram4:Defaultinstallatonofmountingplate
Electrical connections
Caution:Allelectricalconnectionsshouldbemadeinaccordancewithanyrelevantlocalor
nationallegislation,standardsorcodesofpractice.
Prosensedetectorscanoperatebetween12‐24VDC.Theconnectionsocketlocatedon
mainboardasgivenindiagram8anddetailsgiveninbelowtable2:
Output Usage
V+ Powerinput(+)12VDC–24VDC
V‐ Powerinput(‐)12VDC–24VDC
S CurrentOutputSignal(4mA–20mA)
Tablo1:Detectoroutputportsandtheirusage
Thedetectordesignedtogive4‐20mAcurrentoutputsignal.Itisalsopossibletoget
voltageoutputviausinganadditionalresistor.Belowtable3givesrecommendedresistor
specificationstogetcorrectvoltageoutputfromdetectordependingofthepowersource
level:
DetectorPowerVDC Resistor Signallevel(4mA–20mA)
12VDC–24VDC 250Ω,tolerance%1 1VDC–5VDC
12VDC–24VDC 500Ω,tolerance%1 2VDC–10VDC
Table2:Detectorpowerandtheoutputresistor
Pleaseconsiderthecablelenghtwhenperforminginstallationinthefield.TheProsense
detectorrequiresapowersupplybetween12VDCand24VDC.Makesurethataminimum12
VDCsupplyavailableatthedetectorentranceandconsiderthevoltagedropduetocable
resistanceincaseoflongdistanceapplications.Themaximumloopresistanceinthefield
cableiscalculatedasfollows:
Rloop=(Vcontroller–Vdetectormin)/Idetector
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