HK Instruments DPT-Dual-MOD Series User manual

Copyright HK Instruments 2014 www.hkinstruments. Installation version 1.0 2014
INSTALLATION
INSTRUCTIONS
DIFFERENTIAL PRESSURE TRANSMITTERS
DPT-Dual-MOD Series
WARNING
• READTHESEINSTRUCTIONSCAREFULLYBEFORE
ATTEMPTINGTOINSTALL,OPERATEORSERVICETHIS
DEVICE.
• Failuretoobservesafetyinformationandcomplywith
instructionscanresultinPERSONALINJURY,DEATHAND/OR
PROPERTYDAMAGE.
• Toavoidelectricalshockordamagetoequipment,disconnect
powerbeforeinstallingorservicinganduseonlywiringwith
insulationratedforfulldeviceoperatingvoltage.
• Toavoidpotentialreand/orexplosiondonotuseinpotentially
ammableorexplosiveatmospheres.
• Retaintheseinstructionsforfuturereference.
• Thisproduct,wheninstalled,willbepartofanengineered
systemwhosespecicationsandperformancecharacteristics
arenotdesignedorcontrolledbyHKInstruments.Review
applicationsandnationalanlocalcodestoassurethatthe
installationwillbefunctionalandsafe.Useonlyexperienced
andknowledgeabletechnicianstoinstallthisdevice.
SPECIFICATIONS
INTRODUCTION
Thank you for choosing an HK Instruments DPT-Dual-MOD se-
ries differential pressure transmitter. DPT-Dual-MOD combines
two differential pressure transmitters into one device. It offers a
possibilitytomeasurepressurefromtwodifferentpoints.Ithasa
ModbusinterfaceandanInputterminal.WhenusingtheInputter-
minal,temperaturetransmitterscanbereplacedwithtemperature
sensors.Asaresultyouwillsaveincostsofthedevicesandinthe
installationcosts.
APPLICATIONS
DPT-Dual-MODseriesdevicesarecommonlyusedinHVAC/R
systemsfor:
•fan,blowerandltermonitoring
•pressureandowmonitoring
•valveanddampercontrol
•pressuremonitoringincleanrooms
SPECIFICATIONS
Performance
Accuracy(fromappliedpressure):
±1.5%+1Pa
(Including:generalaccuracy,temperaturedrift,linearity,
hysteresis,longtermstabilityandrepetitionerror)
Response time:
1...20sselectableviamenu
Max pressure:
400kPa
Communication
Protocol:MODBUSoverSerialLine
TransmissionMode:RTU
Interface:RS485
Byteformat(11bits)inRTUmode:
 CodingSystem:8-bitbinary
 BitsperByte:
  1startbit
  8databits,leastsignicantbitsentrst
  1bitforparity
  1stopbit
Baudrate:selectableinconguration
Modbusaddress:1−247addressesselectablein
congurationmenu
Zero point calibration options:
•Manualpushbuttonautozero
•ViaModbuswritecoil
ResponseTime:
0.8sec,2.0sec,or10secselectableinconguration
menu
Technical Specifications
Media compatibility:
Dryairornon-aggressivegases
Measuring units on display:
Selectableviamenu(Pa,mbar,inchWC,mmWC,psi)
Measuring element:
Piezoresistive
Environment:
Operatingtemperature:-10...+50°C
Storage temperature: -20...+70 °C
Humidity: 0 to 95 % rH
Physical
Dimensions:
Case: 102.0x71.5x36.0mm
Weight:
150g,withaccessories290g
Mounting:
2each4.3mmscrewholes,oneslotted
Materials:
Case:ABS
Lid:PC
Protection standard:
IP54
Display:
2-line display (12 characters/line)
Line 1: active measurement, inlet A
Line 2: active measurement, inlet B
Electrical Connections:
4+3springloadterminals,max1.5mm2
CableEntry:M20
Pressure connections:
Male 5,0 mm and 6,3 mm
Electrical
Supply voltage:
24VACorVDC±10%
Power consumption:
<1.3W
Output signal:
viaModbus
Conformance
MeetsrequirementsforCEmarking:
EMCdirective2004/108/EC
RoHSDirective2002/95/EC

Copyright HK Instruments 2014 www.hkinstruments. Installation version 1.0 2014
SCHEMATICS
DIMENSIONAL DRAWINGS
INSTALLATION
Figure 1a - Surface mounting
STEP 1: MOUNTING THE DEVICE
1)Mountthedeviceinthedesiredlocation(seestep1).
2)Openthelidandroutethecablethroughthestrainreliefand
connectthewirestotheterminalblock(s)(seestep2).
3)Thedeviceisnowreadyforconguration.

WARNING!Applypoweronlyafterthedeviceisproperlywired.
1)Selectthemountinglocation(duct,wall,panel).
2)Usethedeviceasatemplateandmarkthescrewholes.
3)Mountwithappropriatescrews(notincluded).
Figure 1b - Mounting orientation
Figure 1c - Application connections
Display connection
A
B
24 V
GND
LEDs
Joystick 1
Joystick 2
Joystick 3
Select
Up
Down
Menu buttons
Terminal
blocks
Pressure
sensors
Input terminal
configuration
jumpers
Input 1
Input 2
GND
GND
InputOutput
Pressure
inlet A Pressure inlet B
YES NO NO
Static pressure Filter/Damper
monitoring
Fan/Blower
monitoring
Not
connected

Copyright HK Instruments 2014 www.hkinstruments. Installation version 1.0 2014
STEP 2: WIRING DIAGRAMS CONFIGURATION CONTINUED
ForCEcompliance,aproperlygroundedshieldingcableisrequired.
1)Unscrewthestrainreliefandroutethecable(s).
2)Connectthewiresasshowningure2aand2b.
3)Tightenthestrainrelief.
Figure 2a - Wiring diagram
Figure 2b - Wiring diagram example for input signals
NOTE!Supplyvoltagemustbeconnectedonehourbeforethe
zeropointadjustmentiscarriedout.AccessviaModbusorby
pushbutton.
1)Loosebothtubesfromthepressureinlets+and-.
2)Presstheselectbuttonbriey.
3)WaituntiltheLEDturnsoffandtheninstalltubesagainfor
thepressureinlets.
Itisrecommendedthatthezeropointisadjustedevery12
monthsduringnormaloperation.
STEP 3: CONFIGURATION
Input 1
Input 2
GND
GND
Pt1000
ntc10k
J1
J2
J3
IN1 IN2
Input 1 Pt1000 temperature:
Function 04 - Read input register 3x0005
Input 2 ntc10k temperature:
Function 04 - Read input register 3x0008
1)ActivatethedeviceMenubypushingthetheselectbuttonfor2
seconds.
2)SelecttheaddressforModbus:1...247
BAUD RATE
9600
SELECT
UP
DOWN
ADDRESS
99
SELECT
UP
DOWN
PARITY BIT
NONE
SELECT
UP
DOWN
3)Selectthebaudrate:9600/19200/38400.
4)Selecttheparitybit:None/Even/Odd
5)Selectthepressureunitfordisplay:Pa/inchWC/mmWC/psi/mbar
PRESS. UNIT
Pa
SELECT
UP
DOWN
6)Selecttheresponsetime:1...20s
RESPONSETIME
20 s
SELECT
UP
DOWN
7)Pushtheselectbuttontoexitmenu.
SELECT
EXIT MENU SELECT
STEP 4: ZERO POINT ADJUSTMENT
SELECT
STEP 5: INPUT SIGNAL CONFIGURATION
InputsignalscanbereadoverModbusviaDPTMODRS485
interface.
Signals Accuracy for measurement Resolution
0...10V <0,5% 0,1%
NTC10k <0,5% 0,1%
Pt1000 <0,5% 0,1%
Ni1000/(-LG) <0,5% 0,1%
BININ(potentialfreecontact)
Thejumpersshouldbesetaccordingtotheinstructionsbelowand
thevalueshouldbereadfromtherightregister.Bothinputscanbe
conguredindependently.
Figure 3 - Input signal configuration
J1
J2
J3
IN1 IN2
J1
J1
J1
J2
J2
J2
J3
J3
J3
NTC10k / BIN IN
Pt1000 / Ni10007(-LG)
0...10 V
A
B
24 V
GND
+ Power Supply
24VDC / 24VAC
Input 1
Input 2
GND
GND

Copyright HK Instruments 2014 www.hkinstruments. Installation version 1.0 2014
STEP 6: MODBUS REGISTERS WARRANTY POLICY
Thesellerisobligatedtoprovideawarrantyof24monthsforthede-
livered goods regarding material and manufacturing. The warranty
period is considered to start on the delivery date of the product. If
adefect in raw materialsoraproductionaw isfound,the seller is
obligated,whentheproductissenttothesellerwithoutdelayorbe-
foreexpirationofthewarranty,toamendthemistakeathis/herdis-
cretioneitherbyrepairingthedefectiveproductorbydeliveringfree
ofchargetothebuyeranewawlessproductandsendingittothe
buyer.Deliverycostsfortherepairunderwarrantywillbepaidbythe
buyerandthereturncostsbytheseller.Thewarrantydoesnotcom-
prisedamagescaused byaccident, lightning,ood orother natural
phenomenon,normalwearandtear,improperorcarelesshandling,
abnormal use, overloading, improper storage, incorrect care or re-
construction,orchangesandinstallationworknotdonebytheseller
orhis/herauthorizedrepresentative.Theselectionofmaterialsforde-
vicespronetocorrosionisthebuyer’sresponsibility,unlessotherwise
islegallyagreedupon.Shouldthemanufactureralterthestructureof
thedevice,thesellerisnotobligatedtomakecomparablechangesto
devicesalreadypurchased.Appealingforwarrantyrequiresthatthe
buyerhascorrectlyfullledhis/herdutiesarisenfromthedeliveryand
statedinthecontract.Thesellerwillgiveanewwarrantyforgoods
thathavebeenreplacedorrepairedwithinthewarranty,howeveronly
totheexpirationoftheoriginalproduct’swarrantytime.Thewarranty
includestherepairofadefectivepartordevice,orifneeded,anew
partordevice,butnotinstallationorexchangecosts.Undernocir-
cumstanceisthesellerliablefordamagescompensationforindirect
damage.
Register Parameter description Data Type Value Range
3x0001 Programversion 16bit 0...1000 0,00...99,00
3x0002 PressurereadingA 16bit -250...2500 -250...2500(Pa)
3x0003 PressurereadingB 16bit -250...2500 -250...2500(Pa)
3x0004 Input1:0...10V 16bit 0...1000 0...100%
3x0005 Input1:Pt1000 16bit 500...500 -50...+50°C
3x0006 Input1:Ni1000 16bit -500...500 -50...+50°C
3x0007 Input1:Ni1000-LG 16bit -500...500 -50...+50°C
3x0008 Input1:NTC10k 16bit -500...500 -50...+50°C
3x0009 Input2:0...10V 16bit 0...1000 0...100%
3x0010 Input2:Pt1000 16bit -500...500 -50...+50°C
3 x 0 011 Input2:Ni1000 16bit -500...500 -50...+50°C
3x0012 Input2:Ni1000-LG 16bit -500...500 -50...+50°C
3x0013 Input2:NTC10k 16bit -500...500 -50...+50°C
Function04-Readinputregister
Functioncode02-Readinputstatus
Register Parameter description Data Type Value Range
1x0001 Input1:BININ Bit0 0...1 On-Off
1x0002 Input2:BININ Bit0 0...1 On-Off
Function05-Writesinglecoil
Register Parameter description Data Type Value Range
0x0001 Zeroingfunction Bit0 0...1 On-Off
Functioncode06-Writesingleregister
Register Parameter description Data Type Value Range
4x0001 BetavalueofNTCt hermistor 16bit 0...30000 1...30000(Default:4220)