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Copyright HK Instruments 2021 www.hkinstruments. Installaon version 2.0 2021
INSTALLATION
INSTRUCTIONS
DIFFERENTIAL PRESSURE TRANSMITTERS
DPT-Priima Series
• READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
DEVICE.
• Failuretoobservesafetyinformaonandcomplywith
instruconscanresultinPERSONALINJURY,DEATHAND/OR
PROPERTY DAMAGE.
• Toavoidelectricalshockordamagetoequipment,disconnect
powerbeforeinstallingorservicinganduseonlywiringwith
insulaonratedforfulldeviceoperangvoltage.
• Toavoidpotenalreand/orexplosiondonotuseinpotenally
ammableorexplosiveatmospheres.
• Retaintheseinstruconsforfuturereference.
• Thisproduct,wheninstalled,willbepartofanengineered
systemwhosespecicaonsandperformancecharacteriscs
arenotdesignedorcontrolledbyHKInstruments.Review
applicaonsandnaonalandlocalcodestoassurethatthe
installaonwillbefunconalandsafe.Useonlyexperiencedand
knowledgeabletechnicianstoinstallthisdevice.
SPECIFICATIONS
Thank you for choosing an HK Instruments DPT-Priima dierenal
pressuretransmier.DPT-Priimaisahigh-precisiondierenalpres-
suretransmierengineeredespeciallyforcleanroomsandotherhigh
accuracyapplicaons.DPT-Priimahasanautomaczeropointcalibra-
onandisoponallyavailablewithspanpointcalibraon,localdisplay
and calibraon cercate. The versality of the device is enhanced
byeightselectablemeasuringrangesandbyoutputswithavoltageor
currentsignal.
DPT-Priimaiscommonlyusedinapplicaonsrequiringhigh
measurementaccuracy:
•monitoringpressureincleanrooms
•monitoringpressuredierenceacrossthebuildingenvelope
•monitoringpressureandow
SPECIFICATIONS
Performance
Measurement accuracy* (from applied pressure):
0.4 % ±0.4 Pa
(including:generalaccuracy,linearity,hysteresis,
longtermstability,andrepeonerror)
Output accuracy*:
Voltage: ± 0.025 V at 25 °C
Current:±0.04mAtypical,at25°C,load100Ω
±0.1mAmax,at25 °C,load20–500Ω
*aeranhalf-hourwarm-upme
Overpressure:
Proofpressure:10kPa
Burstpressure:30kPa
Zero point calibraon:
Automacautozeroandmanualpushbuon
Response me:
0.4sor8.0s,selectableviajumper
(63%ofthechange)
Technical Specicaons
Media compability:
Dryairornon-aggressivegases
Measuring units:
Pa,kPa,mbar,inchWC,mmWC,psi,selectable
viajumper
Measuring element:
MEMS,noow-through
Environment:
Operangtemperature:-5...50°C,
Temperaturecompensatedrange0...50°C
Storagetemperature:-40...70°C,
Humidity:0to95%rH,non-condensing
Physical
Dimensions:
Case:90.0x95.0x36.0mm
Weight:
140g
Mounng:
2each4.3mmscrewholes,onesloed
Materials:
Case:ABS
Lid:PC
Ductconnectors:ABS
Tubing:PVC
Protecon standard:
IP54
Display (Oponal)
2-linedisplay(12characters/line)
Line1:acvemeasurement
Line2:units
Electrical connecons:
4-screwterminalblock
Wire:0.2–1.5mm2(12–24AWG)
Cableentry:M16
Pressure ngs:
Male ø 5,2 mm
+Highpressure
−Lowpressure
Electrical
Voltage:
Circuit:3-wire(VOut,24V,GND)
Input:24VACorVDC,±10%
Output:0–10V/2–10V
Powerconsumpon:<1.0W,
Resistanceminimum:1kΩ
Current:
Circuit:3-wire(mAOut,24V,GND)
Input:24VACorVDC,±10%
Output:4–20mA
Powerconsumpon:<1.2W,
Maximumload:500Ω
Minimumload:20Ω
Conformance
Meetstherequirementsfor:
CE: UKCA:
EMC: 2014/30/EU S.I.2016/1091
RoHS: 2011/65/EU S.I.2012/3032
WEEE: 2012/19/EU S.I.2013/3113
INTRODUCTION
APPLICATIONS
WARNING
RoHS
COMPLIANT
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 2.0 2021
SCHEMATICS
DIMENSIONAL DRAWINGS
STEP 1: MOUNTING THE DEVICE
Figure 1b - Mounng orientaon
Figure 1c - Applicaon connecons
1)Selectthemounnglocaon(duct,wall,panel).
2)Usethedeviceasatemplateandmarkthescrewholes.
3)Mountwithappropriatescrews.
Pressure sensor
Zero buon Connecon for
oponal display
Terminal block
LED
Jumpers
B
A
Oponal span trimmer
YES NO NO
Stac pressure Filter/Damper
monitoring
Fan/Blower
monitoring
Not
connected
90.0
77.0
71.5
53.0
4.3
95.0
36.0
5.2
4.2
Figure 1a - Surface mounng
INSTALLATION
1)Mountthedeviceinthedesiredlocaon(seestep1).
2)Openthelidandroutethecablethroughthestrainreliefand
connectthewirestotheterminalblock(s)(seestep2).
3)Thedeviceisnowreadyforconguraon.
WARNING!Applypoweronlyaerthedeviceisproperlywired.
Figure 2b - Wiring diagram current output
A
0–10 V/2–10 V
4–20 mA
24 V
GND
+ Power supply
24 VDC / 24 VAC
STEP 2: WIRING DIAGRAMS
ForCEcompliance,aproperlygroundedshieldingcableisrequired.
1)Unscrewthestrainreliefandroutethecable(s).
2)Connectthewiresasshowningure2aand2b.
3)Tightenthestrainrelief.
Figure 2a - Wiring diagram voltage output
V
4–20 mA
24 V
GND
+ Power supply
24 VDC / 24 VAC
0–10 V/2–10 V
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 2.0 2021
1)Selectthedesiredmeasurementunit.(seestep4)
2)Selectthedesiredmeasurementrange.(seestep5)
3)Selectthedesiredresponseme.(seestep6)
4)Selectthedesiredvoltageoutput.(seestep7)
5)Zerothedevice.(seestep8)
6)Connectthepressuretubes.Connectposivepressureto
portlabeled“+”andnegavepressuretoport“-”.
7)Closethelid.Thedeviceisnowreadytobeused.
STEP 3: CONFIGURATION
2)InstalljumpersonJ1,J2andJ3asrequired.
a.Usingtherangenumberfrom1b,ndthecorrespondingrange
numberinChart2.
b.InstalljumpersonJ1,J2andJ3ondevice,asshownundertherange
numberinChart2.(Greycolourindicatesthatajumperisinstalled.
Referencegure3forjumperinstallaon.)
Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7 Range 8
Pa
kPa
mbar
inchWC
-25–25
-0.025–0.025
-0.25–0.25
-0.10–0.10
-50–50
-0.05–0.05
-0.50–0.50
-0.20–0.20
-100–100
-0.1–0.1
-1.00–1.00
-0.40–0.40
-500–500
-0.50–0.50
-5.00–5.00
-2.01–2.01
0–25
0–0.025
0–0.25
0–0.10
0–50
0–0.05
0–0.50
0–0.20
0–250
0–0.25
0–2.50
0–1.00
0–1000
0–1.00
0–10.0
0–4.01
mmWC
psi
-2.6–2.6
-0.0036–0.0036
-5.1–5.1
-0.0073–0.0073
-10.2–10.2
-0.0145–0.0145
-51.0–51.0
-0.0725–0.0725
0–2.6
0–0.0036
0–5.1
0–0.0073
0–25.5
0–0.0363
0–102.0
0–0.1450
Chart 1
Range 7 Range 8Range 1 Range 2 Range 3 Range 4 Range 5 Range 6
Jumper J1
Jumper J2
Jumper J3
(Grey colour indicates that a jumper is installed. Reference Figure 3 and Schemacs for jumper installaon.)
Chart 2
STEP 5: SELECTING THE MEASUREMENT RANGE
1)Determinetherangenumber
a.FindthemeasurmentunitinChart1(selectedinstep4).
b.Findtherequiredmeasurementrangeonthesamelineasthe
measurementunit(aabove)anddeterminetherangenumberinthe
header.
STEP 4: SELECTING THE MEASUREMENT UNIT
No jumper
Circuit open
Jumper storedJumper installed
Circuit closed
(Grey colour indicates that a jumper is installed)
Figure 3 - Jumper installaon
1)Tochangethemeasurementunitappearingonthedisplay,install
ajumpertobothpinsofJ5(seeFigure3).
2)Pushdownthezerobuonandthemeasurementunitopons
(Pa,kPa,mbar,inchWC,mmWC,psi)willcycleonthedisplay.
3)Toselectaunitopontodisplay,removethejumperfromJ5
whilethemeasurementunitisvisibleonthedisplay.
Theresponsemeaectshowfastthetransmierreactstochangesin
thesystem.Theresponsemeisthemethedevicetakestoreach63%
ofthemeasuredvalue.Tosmoothoutunstablepressureuctuaonsin
airowapplicaons,selectalongerresponseme.
Example:
Selectedresponseme:8.0seconds
Result: Output signal achieves a new value in 40 seconds (Response
me*5)
Tochangeresponseme,installorremovejumperonJ4.
(seeFigure3)
1)InstalljumperonJ4for8.0secondresponseme.
2)RemovejumperfromJ4for0.4secondresponseme.
STEP 6: SELECTING THE RESPONSE TIME
SELECTING THE MEASUREMENT RANGE continued
STEP 7: Using 2-10 V output
Insomeapplicaonsitiscricaltoknowimmidiatelyifthewireis
brokenorthedeviceisdamaged.Inthesecases,a2–10voltageoutput
isrecommended.
1)InstalljumperonJ6for2–10voltageoutput
2)RemovejumperfromJ6for0–10voltageoutput
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 2.0 2021
Thesellerisobligatedtoprovideawarrantyofveyearsforthedeliv-
eredgoodsregardingmaterialandmanufacturing.Thewarrantyperiod
isconsidered tostart on thedelivery dateof theproduct.If a defect
in raw materials or a produconawisfound, theseller is obligated,
whentheproductissenttothesellerwithoutdelayorbeforeexpira-
onofthewarranty,toamendthemistakeathis/herdiscreoneither
by repairing the defecve product or by delivering free of charge to
thebuyeranewawlessproductandsendingittothebuyer.Delivery
costsfor therepairunderwarrantywillbepaidbythebuyer and the
return costs by the seller. The warranty does not comprise damages
causedbyaccident,lightning,oodorothernaturalphenomenon,nor-
malwearandtear,improperorcarelesshandling,abnormaluse,over-
loading,improperstorage,incorrectcareorreconstrucon,orchanges
andinstallaonworknotdonebytheseller.Theseleconofmaterials
fordevicespronetocorrosionisthebuyer’sresponsibility,unlessother-
wiseislegallyagreedupon.Shouldthemanufactureralterthestructure
ofthedevice, thesellerisnotobligatedtomakecomparablechanges
todevicesalreadypurchased.Appealingforwarrantyrequiresthatthe
buyerhascorrectlyfullledhis/herduesarisenfromthedeliveryand
stated in the contract. The seller will give a new warranty for goods
thathavebeenreplacedorrepairedwithinthewarranty,howeveronly
totheexpiraonoftheoriginalproduct’swarrantyme.Thewarranty
includestherepairofadefecvepartordevice,orifneeded,anewpart
ordevice,butnotinstallaonorexchangecosts.Undernocircumstance
isthesellerliablefordamagescompensaonforindirectdamage.
STEP 8: ZEROING THE DEVICE
WARRANTY POLICY
RECYCLING/DISPOSAL
The parts le over from installaon should be
recycled according to your local instrucons.
Decommissioned devices should be taken to a
recyclingsitethatspecializesinelectronicwaste.
Span point calibration
1)Autozerocalibraon
Autozero calibraon (-AZ) is an autozero funcon in the form of an
automaczeroingcircuitbuiltintothePCBboard.Theautozerocali-
braon electronically adjusts the transmier zero at predetermined
me intervals(every10minutes).Thefuncon eliminatesalloutput
signaldriduetothermal,electronicormechanicaleects,aswellas
theneedfortechnicianstoremovehighandlowpressuretubeswhen
performing inial or periodic transmier zero point calibraon. The
autozeroadjustmenttakes4secondsaerwhichthedevicereturnsto
itsnormalmeasuringmode.Duringthe4secondadjustmentperiod,
theoutputanddisplayvalueswillfreezetothelatestmeasuredvalue.
Transmiersequippedwiththeautozerocalibraonarevirtuallymain-
tenancefreeandmanualzeroingisnotrequired.
NOTE! Always zero the device before use.
Tozerothedevicetwooponsareavailable:
1)Autozerocalibraon(manualzeroingnotrequired)
2)ManualPushbuonzeropointcalibraon
2)ManualPushbuonzeropointcalibraon
NOTE:Supplyvoltagemustbeconnectedatleastonehourpriortozero
pointadjustment.
a)Disconnectbothpressuretubesfromthepressureportslabeled+
and–.
b)PushdownthezerobuonunltheLEDlight(red)turnsonandthe
displayreads“zeroing”(displayopononly).(seeFigure4)
c)Thezeroingofthedevicewillproceedautomacallyin4seconds.
Zeroingledlightsonlyforamoment.Zeroiningiscompletewhen
thedisplayreads0(displayopononly).
d)ReinstallthepressuretubesensuringthattheHighpressuretube
isconnectedtotheportlabeled+,andtheLowpressuretubeis
connectedtotheportlabeled−.
a) Disconnect both pressure tubes from the pressure ports labeled +
and –.
b) Push down the zero buon (joysck) unl the LED light (red)
turns on and the display reads “zeroing” (display opon only). (see
Figure 6)
c) The zeroing of the device will proceed automacally. Zeroing is
complete when the LED turns off, and the display reads 0 (display
opon only).
d) Reinstall the pressure tubes, ensuring the High pressure tube is
connected to the port labeled +, and the Low pressure tube is
connected to the port labeled −.
Press down buon
LED turns ON
Display reads “Zeroing”
LED
Figure 4
Oponalspanpointcalibraon(-S)isusedforadjusngtheupperrange
value of the measurement range. The span point calibraon has been
performedbythemanufactureranditisusuallynotnecessarytoadjust
thespansengonsite.Insomecases,spanpointeldcalibraonmay
benecessary,e.g.incaseofannualcalibraonincleanroomapplicaons.
Thespanpointcalibraonrequiresaceredhighaccuracypressurecali-
bratorforreferencepressure.
Toperformaspanpointcalibraon:
1) Connect pressure tubes between the transmier and the pressure
calibratorconnectors.Connectposivepressuretoport“+”andnega-
vepressuretoport“-”.
2)Setthecalibratorsupplypressuretomatchtheupperrangevalueof
themeasurementrangeusedinthetransmier(e.g.whenused-50…
+50Pameasurementrange,setthecalibratorpressureto+50Pa).
3)Openthelidofthetransmier.
4)Performamanualpushbuonzeropointcalibraon(seestep8).
5)Adjusttheupperrangevaluebyturningthetrimmer(seeschemacs)
witha screwdriverunlthe value shown onthe transmier display
correspondstothesetupvalueofthecalibrator.
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