HK Instruments CDT2000 Series User manual
- Type
- User manual
HK Instruments CDT2000 Series carbon dioxide transmitters with optional relative humidity and temperature measurement are designed for commercial use in HVAC/R applications, such as monitoring CO2 and humidity levels in offices, public spaces, meeting rooms, and classrooms, as well as CO2 levels and humidity in ventilation systems.
HK Instruments CDT2000 Series carbon dioxide transmitters with optional relative humidity and temperature measurement are designed for commercial use in HVAC/R applications, such as monitoring CO2 and humidity levels in offices, public spaces, meeting rooms, and classrooms, as well as CO2 levels and humidity in ventilation systems.
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 7.0 2021
INSTALLATION
INSTRUCTIONS
CARBON DIOXIDE TRANSMITTERS
CDT2000 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
ThankyouforchoosinganHKInstrumentsCDT2000seriescarbon
dioxidetransmier.TheCDT2000seriesisintendedforuseincom-
mercialenvironmentsinHVAC/Rapplicaons.
TheCDT2000seriesmeasurescarbondioxide(CO2),ulizingthein-
dustrystandardNDIRmeasurementprinciple,andtemperature(T).
Oponalrelavehumidity(rH)measurementisalsoavailableinthe
samedevice.Eachmeasurementparameter(CO2,rH,T)hasasepa-
rateeldcongurableoutput.
TheCDT2000seriescarbondioxidetransmiersareavailablewith
Modbusconguraon,relayandtouchscreendisplay.
The CDT2000 series transmiers calibrate themselves automa-
callyusingABCTMlogic.TheABCTMlogicrequiresthatthespacein
which the transmier is used needs to to be unoccupied for four
hoursperdaysothattheindoorCO2concentraondropstotheout-
sidelevel.CDT2000-DCisadualchannelmodelwithameasuring
channelandareferencechannelthatmakesaconnuouscompari-
sonandthenecessaryadjustmentaccordingly.CDT2000-DCisalso
suitableforbuildingsthatareconnuouslyoccupied.
•humidityinvariousindustrialapplicaons
•temperaturesinHVAC/Renvironment
•CDT2000-DCseriesdevicescanalsobeusedinapplicaonswhere
thereisaconstantsourceofcarbondioxidepresent(forexample
hospitalsandgreenhouses)
SPECIFICATIONS
Performance
Measurement ranges:
CO2:400–2000ppm
Temperature:0...50°C
Relavehumidity:0–100%
Accuracy:
CO2:±40ppm+2%ofreading,DCmodel:75ppmor
10%ofreading(whicheverisgreater)
Temperature:<0.5ºC
Relavehumidity:±2...3%at0...50°Cand10–90%rH
Totalerrorbandincludesaccuracy,hysteresisand
temperatureeectover5...50°Cand10–90%rH.
Technical Specicaons
Media compability:
Dryairornon-aggressivegases
Measuring units:
ppm,°Cand%rH
Measuring element:
CO2:Non-dispersiveinfrared(NDIR)
Temperature: Pt1000(modelswithoutrH-measurement
Integrated(modelswithrH-measurement)
Relavehumidity:Thermosetpolymercapacive
sensingelement
Calibraon:
Automacself-calibraonABCLogicTMorconnuous
comparison(DC)
Environment:
Operangtemperature:0...50°C
Storagetemperature:-20...70°C
Humidity:0to95%rH,noncondensing
Physical
Dimensions:
Case:99x90x32mm
Weight:
150g
Mounng:
3screwholessloed,3.8mm
Materials:
Case: ABS
Protecon standard:
IP20
Display (Oponal)
Touchscreen
Size:77.4x52.4mm
Electrical connecons:
Powersupply:
5-screwterminalblock
(24V,GND,CO2, rH, T)
0.2–1.5mm2(12–24AWG)
Relay out:
3-screwterminalblock
(NC,COM,NO)
0.2–1.5mm2(12–24AWG)
Electrical
Input: 24VACorVDC,±10%
Currentconsumpon:max90mA(at24V)+
10mAforeachvoltageoutputor20mAfor
eachcurrentoutput
CO2outputsignal:
0–10V,R>1kΩ
2–10V,R>1kΩ(oponalvoltageoutput,displayrequired)
4–20mA,R<500Ω
Temperatureoutputsignal:
0–10V,R>1kΩ
2–10V,R>1kΩ(oponalvoltageoutput,displayrequired)
4–20mA,R<500Ω
Relavehumidityoutputsignal:
0–10V,R>1kΩ
2–10V,R>1kΩ(oponalvoltageoutput,displayrequired)
4–20mA,R<500Ω
Relay out:
SPDTRelay,250VAC/30VDC/6A
Adjustableswitchingpointandhysteresis
Conformance
MeetsrequirementsforCEmarking:
EMCDirecve2014/30/EU
RoHSDirecve2011/65/EU
LVDDirecve2014/35/EU
WEEEDirecve2012/19/EU
INTRODUCTION
APPLICATIONS
WARNING
CDTseriesdevicesarecommonlyusedtomonitor:
• CO2andhumiditylevelsinoces,publicspaces,meengrooms
andclassrooms
• CO2levelsofreturnairinvenlaonsystems
•incomingairandreturnairhumiditylevelsinvenlaonsystem
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
RoHS 2
2011/65/EU
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 7.0 2021
SCHEMATICS
DIMENSIONAL DRAWINGS
INSTALLATION
STEP 1: MOUNTING THE DEVICE
1)Mountthedeviceinthedesiredlocaon(seestep1).
2)Routethecablesandconnectthewires(seestep2).
3)Thedeviceisnowreadyforconguraon.
WARNING!Applypoweronlyaerthedeviceisproperlywired.
Figure 1a - Surface mounng
1)Selectamounnglocaononthewallat1.2–1.8m(4–6)above
theoorandatleast50cm(20in)fromtheadjacentwall.Do
notblockdeviceairventsfromanydireconandleaveatleast
20cm(8in)gaptootherdevices.Locatetheunitinanareawith
goodvenlaonandanaveragetemperature,whereitwillbe
responsivetochangestotheroomcondions.TheCDTshouldbe
mountedonaatsurface.
DonotlocatetheCDTwhereitcanbeaectedby:
•Directsunlight
•Drasordeadareasbehinddoors
•Radiantheatfromappliances
•Concealedpipesorchimneys
•Outsidewallsorunheated/uncooledareas
2)Usethedeviceasatemplateandmarkthescrewholes.
3)Mountthewallplatewithscrews.
•Incorrectinstallaonmaycauseashiintemperatureoutput
•Securethelidwithalockingscrew,iftherelayisconnectedtothe
mainspower.
Display locking
jumper
Output mode
selecon
jumpers
Contact pins for
relay terminal
Contact pins for
terminal block
Terminal block
Terminal block for relay
99.0
90.0
83.0
49.5
14.0
45.0
18.0
Ø 4.0
32.0
YES NO NO
Figure 1b - Mounng orientaon
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 7.0 2021
CAUTION!
•ForCEcompliance,aproperlygroundedshieldingcableis
required.
•Usecopperwireonly.Insulateorwirenutallunusedleads.
•Supplyaseparatecableforrelayandsignaloutwhenusingline
voltagetopowertherelay.
•Anywiringmaycarrythefulloperanglinevoltagecurrentbased
oneldinstallaon.Thecoverlockingscrewmustbeinstalledif
thelinevoltageissuppliedtotherelay.
•Careshouldbeusedtoavoidelectrostacdischargetothedevice.
•Thisunithasconguraonjumpers.Youmayneedtorecongure
thisdeviceforyourapplicaon.
1)Routethecablesthroughthesquareopeninginthebackplateor
forsurfacewiringselectaknockoutonthetoporboomofthe
wallplate,asshowninFigure2a.
2)ConnectthewiresasshowninFigure2band2c.
WIRING DIAGRAMS CONTINUED
Figure 2a - Roung the cables
24 V
GND
CO2
rH
Temp
+
Output 0/2–10 V / 4–20 mA
Output 0/2–10 V / 4–20 mA
Output 0/2–10 V / 4–20 mA
Figure 2b - Wiring diagram: Power input & signal output
Wires can be routed through the square opening in the back plate
Wires can be routed through the top knockouts
Wires can be routed through the boom knockouts
Figure 2d - Wiring diagram: Relay
NC
COM
NO
STEP 2: WIRING DIAGRAMS
NOTE!Whenusinglongconneconwiresitmaybenecessarytousea
separateGNDwireforvoltageoutputcurrenttopreventmeasurement
distoron.TheneedforanextraGNDwiredependsonthecrosssec-
onandlengthoftheusedconneconwires.Iflongand/orsmallcross
seconwiresareused,supplycurrentandwireresistancemaygener-
ate avoltage drop in thecommon GNDwire resulngina distorted
outputmeasurement.
24 V
GND
CO
2
rH
+
Temp
V V V
Output 0/2...10 V
Output 0/2...10 V
Output 0/2...10 V
Figure 2c - Wiring diagram: Extra GND wire
STEP 3: CONFIGURATION
ConguraonoftheCDTseriesdeviceconsistsof:
1)Conguringthejumpers(seestep4).
2)Conguraonmenuopons.
(Display-andModbusversionsonly.Seetheusermanualfor
furtherdetails.)
Copyright HK Instruments 2021 www.hkinstruments. Installaon version 7.0 2021
1)Conguraonoftheoutputmodesof:
•Carbondioxide(CO2)
•Relavehumidity(rH)
•Temperature(Temp)
Selecttheoutputmode,current(4–20mA)orvoltage(0–10V),
byinstallingjumpersasshowninFigure4.Eachoutputarecong-
uredseparately.
Toselect2–10Voutputmodeonadisplayversionofthedevice:
First,select0–10Voutputbyjumper(s),thenchangethevoltage(V)
outputfrom0–10Vto2–10Vviatheconguraonmenu.Please
seetheusermanualformoredetails.
Thesellerisobligatedtoprovideawarrantyofveyearsforthedeliv-
eredgoodsregardingmaterialandmanufacturing.Thewarrantyperiod
isconsideredtostartonthedeliverydateoftheproduct.Ifadefectin
rawmaterialsoraproduconawisfound,thesellerisobligated,when
theproductissenttothesellerwithoutdelayorbeforeexpiraonof
thewarranty,toamendthemistakeathis/herdiscreoneitherbyre-
pairingthedefecveproductorbydeliveringfreeofchargetothebuy-
eranewawlessproductandsendingittothebuyer.Deliverycosts
fortherepairunderwarrantywillbepaidbythebuyerandthereturn
costsbytheseller.Thewarrantydoesnotcomprisedamagescausedby
accident, lightning, ood or other natural phenomenon, normal wear
andtear,improperorcarelesshandling,abnormaluse,overloading,im-
properstorage,incorrectcareorreconstrucon,orchangesandinstal-
laonworknotdonebythesellerorhis/herauthorizedrepresentave.
Theseleconofmaterialsfordevicespronetocorrosionisthebuyer’s
responsibility,unlessotherwiseislegallyagreedupon.Shouldtheman-
ufactureralterthestructureofthedevice,thesellerisnotobligatedto
makecomparablechangestodevicesalreadypurchased.Appealingfor
warrantyrequiresthatthebuyerhascorrectlyfullledhis/herdues
arisenfromthedeliveryandstatedinthecontract.Thesellerwillgive
anewwarrantyforgoodsthathavebeenreplacedorrepairedwithin
thewarranty,howeveronlytotheexpiraonoftheoriginalproduct’s
warrantyme.Thewarrantyincludestherepairofadefecvepartor
device, orifneeded,a new partordevice,butnotinstallaonorex-
change costs. Under no circumstance is theseller liablefor damages
compensaonforindirectdamage.
Jumper installed to the le side pins:
0–10 V output selected
CO2
rH
Temp
0–10 V 4–20 mA
Jumper installed to the right side pins:
4–20 mA output selected
CO2
rH
Temp
0–10 V 4–20 mA
First jumper installed to the right side pins:
4–20 mA output selected for CO2
Second and third jumper installed to the le side pins
0–10 V outputs selected for relave humidity & temperature
CO2
rH
Temp
0–10 V 4–20 mA
Figure 4
STEP 4: Jumper settings RECYCLING/DISPOSAL
The parts le over from installaon should be
recycled according to your local instrucons.
Decommissioned devices should be taken to a
recyclingsitethatspecializesinelectronicwaste.
WARRANTY POLICY
(Grey colour indicates that a jumper is installed)
No jumper
Circuit open
Jumper installed
Circuit closed
Jumper stored
Figure 3 - Jumper installaon
2)Lockingthedisplay:
Installthejumpertolockthedisplaytopreventaccesstothecongu-
raonmenuaerinstallaoniscompleted(seetheschemacsforthe
locaonofthepins).
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HK Instruments CDT2000 Series User manual
- Type
- User manual
HK Instruments CDT2000 Series carbon dioxide transmitters with optional relative humidity and temperature measurement are designed for commercial use in HVAC/R applications, such as monitoring CO2 and humidity levels in offices, public spaces, meeting rooms, and classrooms, as well as CO2 levels and humidity in ventilation systems.
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