HK Instruments CDT2000 Series Installation Instructions

INTRODUCTION
Thank you for choosing an HK Instruments CDT2000 series carbon
dioxide transmiter. The CDT2000 series is intended for use in com-
mercial environments in HVAC/R applicaions.
The CDT2000 series measures carbon dioxide (CO
dustry standard NDIR measurement principle, and temperature (T).
Opional relaive humidity (rH) measurement is also available in the
same device. Each measurement parameter (CO
rate ield conigurable output.
The CDT2000 series carbon dioxide transmiters are available with
Modbus coniguraion, relay and touchscreen display.
The CDT2000 series transmiters calibrate themselves automai-
cally using ABC logic. The ABC
TM
which the transmiter is used needs to to be unoccupied for four
hours per day so that the indoor CO
side level. CDT2000-DC is a dual channel model with a measuring
channel and a reference channel that makes a coninuous compari-
son and the necessary adjustment accordingly. CDT2000-DC is also
suitable for buildings that are coninuously occupied.
APPLICATIONS
CDT series devices are commonly used to monitor:
and humidity levels in oices, public spaces, meeing rooms
• CO
2
SPECIFICATIONS and classrooms
levels of return air in venilaion systems
• CO
2
• incoming air and return air humidity levels in venilaion system
SPECIFICATIONS
Performance
Measurement ranges:
: 400–2000 ppm
CO
2
Temperature: 0...50 °C
Relaive humidity: 0–100 %
Accuracy:
: ±40 ppm + 2 % of reading, DC model: 75 ppm or
CO
2
10 % of reading (whichever is greater)
Temperature: <0.5 ºC
Relaive humidity: ±2...3 % at 0...50 °C and 10–90 % rH
Total error band includes accuracy, hysteresis and
temperature efect over 5...50 °C and 10–90 % rH.
Technical Speciicaions
Media compaibility:
Dry air or non-aggressive gases
Measuring units:
ppm, °C and % rH
Measuring element:
: Non-dispersive infrared (NDIR)
CO
2
Temperature: Pt1000
Relaive humidity: Thermoset polymer capaciive
sensing element
Calibraion:
Automaic self-calibraion ABC Logic
comparison (DC)
Environment:
Operaing temperature: 0...50 °C
Storage temperature: -20...70 °C
Humidity: 0 to 95 % rH, non condensing
Copyright HK Instruments 2017
CARBON DIOXIDE TRANSMITTERS
CDT2000 Series
), uilizing the in-
2
, rH, T) has a sepa-
2
logic requires that the space in
TM
concentraion drops to the out-
2
Physical
Dimensions:
Case: 99 x 90 x 32 mm
Weight:
150 g
Mouning:
3 screw holes sloted, 3.8 mm
Materials:
Case: ABS
Protecion standard:
IP20
Display (Opional)
Touchscreen
Size: 77.4 x 52.4 mm
Electrical connecions:
Power supply:
5-screw terminal block
(24 V, GND, CO
0.2–1.5 mm
Relay out:
3-screw terminal block
(NC, COM, NO)
0.2–1.5 mm
Electrical
or coninuous
TM
Input: 24 VAC or VDC, ±10 %
Current consumpion: max 90 mA (at 24 V) +
10 mA for each voltage output or 20 mA for
each current output
WARNING
• READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
DEVICE.
• Failure to observe safety informaion and comply with
instrucions 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
insulaion rated for full device operaing voltage.
• To avoid potenial ire and/or explosion do not use in potenially
lammable or explosive atmospheres.
• Retain these instrucions for future reference.
• This product, when installed, will be part of an engineered
system whose speciicaions and performance characterisics
are not designed or controlled by HK Instruments. Review
applicaions and naional and local codes to assure that the
installaion will be funcional and safe. Use only experienced and
knowledgeable technicians to install this device.
• humidity in various industrial applicaions
• temperatures in HVAC/R environment
• CDT2000-DC series devices can also be used in applicaions where
there is a constant source of carbon dioxide present (for example
hospitals and greenhouses)
, rH, T)
2
(12–24 AWG)
2
(12–24 AWG)
2
www.hkinstruments.i
output signal:
CO
2
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
4–20 mA, R<500 Ω
Temperature output signal:
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
4–20 mA, R<500 Ω
Relaive humidity output signal:
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
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 marking:
EMC Direcive 2014/30/EU
RoHS Direcive 2011/65/EU
LVD Direcive 2014/35/EU
WEEE Direcive 2012/19/EU
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
Installaion version 5.0 2017
INSTALLATION
INSTRUCTIONS
RoHS 2
2011/65/EU