HK Instruments CDT2000 User manual

INSTALLATION

INSTRUCTIONS

CARBON DIOXIDE TRANSMITTERS

CDT2000 Series

• READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING

TO INSTALL, OPERATE OR SERVICE THIS DEVICE.

• Failuretoobservesafetyinformaonandcomplywithinstrucons

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

insulaonratedforfulldeviceoperangvoltage.

• Toavoidpotenalreand/orexplosiondonotuseinpotenally

ammableorexplosiveatmospheres.

• Retaintheseinstruconsforfuturereference.

• Thisproduct,wheninstalled,willbepartofanengineeredsystem

whosespecicaonsandperformancecharacteriscsarenot

designedorcontrolledbyHKInstruments.Reviewapplicaons

andnaonalandlocalcodestoassurethattheinstallaonwill

befunconalandsafe.Useonlyexperiencedandknowledgeable

technicianstoinstallthisdevice.

•Fuseatloadsupply(normally6A,10A,16A)doesnotalwayslimit

therelayoutputloadcurrentto6A.RelayMaximumLoad(250Vx

6Ares.)

•Addanexternalfusetorelaycommonconnector.Useame-lag

 fuse(max6A)thatisinaccordancewiththestandardIEC60127-2.

 Theproductdoesn’thaveaninternalfusefortherelay.

 CAUTION:Theproductmayonlybeconnectedtoovervoltage

 categoryIIelectricitynetworkaccordingtoIEC60664-1.

SPECIFICATIONS

ThankyouforchoosinganHKInstrumentsCDT2000seriescarbon

dioxidetransmier.TheCDT2000seriesisintendedforuseincom-

mercialenvironmentsinHVAC/Rapplicaons.

TheCDT2000seriesmeasurescarbondioxide(CO2),ulizingthein-

dustrystandardNDIRmeasurementprinciple,andtemperature(T).

Oponalrelavehumidity(rH)measurementisalsoavailableinthe

samedevice.Eachmeasurementparameter(CO2,rH,T)hasasepa-

rateeldcongurableoutput.

TheCDT2000seriescarbondioxidetransmiersareavailablewith

Modbusconguraon,relayandtouchscreendisplay.

The CDT2000 series transmiers calibrate themselves automa-

callyusingABCTMlogic.TheABCTMlogicrequiresthatthespacein

which the transmier is used needs to to be unoccupied for four

hoursperdaysothattheindoorCO2concentraondropstotheout-

sidelevel.CDT2000-DCisadualchannelmodelwithameasuring

channelandareferencechannelthatmakesaconnuouscompari-

sonandthenecessaryadjustmentaccordingly.CDT2000-DCisalso

suitableforbuildingsthatareconnuouslyoccupied.

•humidityinvariousindustrialapplicaons

•temperaturesinHVAC/Renvironment

•CDT2000-DCseriesdevicescanalsobeusedinapplicaonswhere

thereisaconstantsourceofcarbondioxidepresent(forexample

hospitalsandgreenhouses)

SPECIFICATIONS

Performance

Measurement ranges:

CO2:400–2000ppm

Temperature:0...50°C

Relavehumidity:0–100%

Accuracy:

CO2:±40ppm+3%ofreading,DCmodel:75ppmor

10%ofreading(whicheverisgreater)

Temperature:<0.5ºC

Relavehumidity:±2...3%at0...50°Cand10–90%rH

Totalerrorbandincludesaccuracy,hysteresisand

temperatureeectover5...50°Cand10–90%rH.

Technical Specicaons

Media compability:

Dryairornon-aggressivegases

Measuring units:

ppm,°Cand%rH

Measuring element:

CO2:Non-dispersiveinfrared(NDIR)

Temperature: Pt1000(modelswithoutrH-measurement

  Integrated(modelswithrH-measurement)

Relavehumidity:Thermosetpolymercapacive

sensingelement

Calibraon:

Automacself-calibraonABCLogicTMorconnuous

comparison(DC)

Environment:

Operangtemperature:0...50°C

Storagetemperature:-20...70°C

Humidity:0to95%rH,noncondensing

Physical

Dimensions:

Case:99x90x32mm

Weight:

150g

Mounng:

3screwholessloed,3.8mm

Materials:

Case: ABS

Protecon standard:

IP20

Display (Oponal)

Touchscreen

Size:77.4x52.4mm

Electrical connecons:

Powersupply:

 5-screwterminalblock

 (24V,GND,CO2,rH,T)

 0.2–1.5mm2(16–24AWG)

Relay out:

 3-screwterminalblock

 (NC,COM,NO)

 0.2–1.5mm2(16–24AWG)

Electrical

Input: 24VACorVDC,±10%

 Currentconsumpon:max90mA(at24V)+ 

 10mAforeachvoltageoutputor20mAfor 

 eachcurrentoutput

Outputsignal(CO2,rH,temperature):

 0–10V,R>1kΩ

 2–10V,R>1kΩ(oponalvoltageoutput,displayrequired)

 4–20mA,R<500Ω

Relay out:

 SPDTRelay,250VAC/30VDC/6A

 Adjustableswitchingpointandhysteresis

Conformance

Meetsrequirementsfor:

  CE:  UKCA:

EMC:  2014/30/EU S.I.2016/1091

RoHS:  2011/65/EU S.I.2012/3032

LVD/EESR: 2014/35/EU S.I.2016/1101

WEEE:  2012/19/EU S.I.2013/3113

INTRODUCTION

APPLICATIONS

WARNING

CDTseriesdevicesarecommonlyusedtomonitor:

• CO2andhumiditylevelsinoces,publicspaces,meengrooms

andclassrooms

• CO2levelsofreturnairinvenlaonsystems

•incomingairandreturnairhumiditylevelsinvenlaonsystem

RoHS

COMPLIANT

SCHEMATICS

DIMENSIONAL DRAWINGS

INSTALLATION

STEP 1: MOUNTING THE DEVICE

1)Mountthedeviceinthedesiredlocaon(seestep1).

2)Routethecablesandconnectthewires(seestep2).

3)Thedeviceisnowreadyforconguraon.

WARNING!Applypoweronlyaerthedeviceisproperlywired.

Figure 1a - Surface mounng

1)Selectamounnglocaononthewallat1.2–1.8m(4–6)above

theoorandatleast50cm(20in)fromtheadjacentwall.Do

notblockdeviceairventsfromanydireconandleaveatleast

20cm(8in)gaptootherdevices.Locatetheunitinanareawith

goodvenlaonandanaveragetemperature,whereitwillbe

responsivetochangestotheroomcondions.TheCDTshouldbe

mountedonaatsurface.

DonotlocatetheCDTwhereitcanbeaectedby:

•Directsunlight

•Drasordeadareasbehinddoors

•Radiantheatfromappliances

•Concealedpipesorchimneys

•Outsidewallsorunheated/uncooledareas

2)Usethedeviceasatemplateandmarkthescrewholes.

3)Mountthewallplatewithscrews.

•Incorrectinstallaonmaycauseashiintemperatureoutput

•Securethelidwithalockingscrew,iftherelayisconnectedtothe

mainspower.

Display locking

jumper

Output mode

selecon

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 - Mounng orientaon

CAUTION!

•ForCEcompliance,aproperlygroundedshieldingcableis

required.

•Usecopperwireonly.Insulateorwirenutallunusedleads.

•Supplyaseparatecableforrelayandsignaloutwhenusingline

voltagetopowertherelay.

•Anywiringmaycarrythefulloperanglinevoltagecurrentbased

oneldinstallaon.Thecoverlockingscrewmustbeinstalledif

thelinevoltageissuppliedtotherelay.

•Careshouldbeusedtoavoidelectrostacdischargetothedevice.

•Thisunithasconguraonjumpers.Youmayneedtorecongure

thisdeviceforyourapplicaon.

1)Routethecablesthroughthesquareopeninginthebackplateor

forsurfacewiringselectaknockoutonthetoporboomofthe

wallplate,asshowninFigure2a.

2)ConnectthewiresasshowninFigure2band2c.

WIRING DIAGRAMS CONTINUED

Figure 2a - Roung the cables

24 V

GND

CO2

Temp

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 boom knockouts

Figure 2d - Wiring diagram: Relay

COM

STEP 2: WIRING DIAGRAMS

NOTE!Whenusinglongconneconwiresitmaybenecessarytousea

separateGNDwireforvoltageoutputcurrenttopreventmeasurement

distoron.TheneedforanextraGNDwiredependsonthecrosssec-

onandlengthoftheusedconneconwires.Iflongand/orsmallcross

seconwiresareused,supplycurrentandwireresistancemaygener-

ate avoltage drop in thecommon GNDwire resulngina distorted

outputmeasurement.

24 V

GND

Temp

V V V

Output 0/2...10 V

Figure 2c - Wiring diagram: Extra GND wire

STEP 3: CONFIGURATION

ConguraonoftheCDTseriesdeviceconsistsof:

1)Conguringthejumpers(seestep4).

2)Conguraonmenuopons.

(Display-andModbusversionsonly.Seetheusermanualfor

furtherdetails.)

1)Conguraonoftheoutputmodesof:

•Carbondioxide(CO2)

•Relavehumidity(rH)

•Temperature(Temp)

Selecttheoutputmode,current(4–20mA)orvoltage(0–10V),

byinstallingjumpersasshowninFigure4.Eachoutputarecong-

uredseparately.

Toselect2–10Voutputmodeonadisplayversionofthedevice:

First,select0–10Voutputbyjumper(s),thenchangethevoltage(V)

outputfrom0–10Vto2–10Vviatheconguraonmenu.Please

seetheusermanualformoredetails.

Thesellerisobligatedtoprovideawarrantyofveyearsforthedeliv-

ered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produconawisfound,thesellerisobligated,

whentheproductissenttothesellerwithoutdelayorbeforeexpira-

onofthewarranty,toamendthemistakeathis/herdiscreoneither

by repairing the defecve 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 comprise damages

causedbyaccident,lightning,oodorothernaturalphenomenon,nor-

malwearandtear,improperorcarelesshandling,abnormaluse,over-

loading,improperstorage,incorrectcareorreconstrucon,orchanges

and installaon worknotdonebytheseller. Theseleconofmateri-

alsfordevices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duesarisenfromthede-

liveryandstatedinthecontract.Thesellerwillgiveanewwarrantyfor

goodsthathavebeenreplacedorrepairedwithinthewarranty,how-

everonlytotheexpiraonoftheoriginalproduct’swarrantyme.The

warrantyincludestherepairofadefecvepartordevice,orifneeded,

anewpartordevice,butnotinstallaonorexchangecosts.Underno

circumstanceisthesellerliablefordamagescompensaonforindirect

damage.

Jumper installed to the le side pins:

0–10 V output selected

CO2

Temp

0–10 V 4–20 mA

Jumper installed to the right side pins:

4–20 mA output selected

CO2

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 relave humidity & temperature

CO2

Temp

0–10 V 4–20 mA

Figure 4

STEP 4: Jumper settings RECYCLING/DISPOSAL

The parts le over from installaon should be

recycled according to your local instrucons.

Decommissioned devices should be taken to a

recyclingsitethatspecializesinelectronicwaste.

WARRANTY POLICY

(Grey colour indicates that a jumper is installed)

No jumper

Circuit open

Jumper installed

Circuit closed

Jumper stored

Figure 3 - Jumper installaon

2)Lockingthedisplay:

Installthejumpertolockthedisplaytopreventaccesstothecongu-

raonmenuaerinstallaoniscompleted(seetheschemacsforthe

locaonofthepins).

HK Instruments CDT2000, CDT2000 Series User manual

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