Instruction Manual

Copyright HK Instruments 2022 www.hkinstruments. Installaonversion7.02022
INSTALLATION
INSTRUCTIONS
CARBON DIOXIDE TRANSMITTERS
CDT-MOD-2000 Duct 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.
SPECIFICATIONS
Thank youfor choosinganHK Instruments CDT-MOD-2000 Duct
seriescarbondioxidetransmierwithModbusinterface.TheCDT-
MOD-2000Ductseriesisintendedforuseincommercialenviron-
mentsinHVAC/Rapplicaons.
CDT-MOD-2000 Duct is a carbon dioxide transmier with tem-
peratureoutputinstalledinairvenlaonduct.Illuminateddisplay
ensureseasyreadabilityalsofromadistance.TheCDT-MOD-2000
Duct has a screwless lid and an easily adjustable mounng ange
thatmaketheinstallaonofthedeviceeasy.
TheCDT-MOD-2000Ductseriestransmierscalibratethemselves
automacallyusingABC
TM
logic.TheABC
TM
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CO
2
concentraondrops
to the outside level. CDT-MOD-2000-DC Duct is a dual channel
modelwithameasuringchannelandareferencechannelthatmakes
aconnuouscomparisonandthenecessaryadjustmentaccordingly.
CDT-MOD-2000-DCDuctisalsosuitableforbuildingsthatarecon-
nuouslyoccupied.
CDT-MOD-2000Ductseriesdevicesarecommonlyusedtomonitor:
• CO
2
andtemperaturelevelsofincomingandreturnairinvenlaon
systems
•CDT-MOD-2000-DCDuct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:
CO
2
:400–2000ppm
Temperature:0...50°C
Accuracy:
CO
2
:±40ppm+3%ofreading,DCmodel:75ppmor
10%ofreading(whicheverisgreater)
Temperature:<0.5ºC
Technical Specicaons
Media compability:
Dryairornon-aggressivegases
Measuring units:
ppmand°C
Measuring element:
CO
2
:Non-dispersiveinfrared(NDIR)
Temperature:NTC10k
Calibraon:
Automacself-calibraonABCLogic
TM
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:119x95.5x45mm
Probe:L=186mm,d=12mm
Mounng:
Withange,adjustable40...155mm
Weight:
150g
Materials:
Case:ABS
Cover:PC
Probe:ABS
Protecon standard:
IP54
Electrical connecons:
4springloadedterminals
Powersupply:
 (24VandGND)
 0.2–1.5mm
2
(16–24AWG)
ModbusRTU:
 AandBline
 0.2–1.5mm
2
(16–24AWG)
Electrical
Supplyvoltage:24VACorVDC±10%
Currentconsumpon:max230mA(at24V)+10mA
foreachvoltageoutput
Communicaon
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guraon
Modbusaddress:1−247addressesselectablein
conguraonmenu
Conformance
Meetsrequirementsfor:
  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 WARNING
APPLICATIONS
RoHS
COMPLIANT