HK Instruments CDT2000 Series Quick Start Manual

INTRODUCTION
Thank you for choosing an HK Instruments CDT2000 series carbon
dioxide transmitter. The CDT2000 series is intended for use in com-
mercial environments in HVAC/R applications.
The CDT2000 series measures carbon dioxide (CO
dustry standard NDIR measurement principle, and temperature (T).
Optional relative humidity (rH) measurement is also available in the
same device. Each measurement parameter (CO
rate field configurable output.
The CDT2000 series carbon dioxide transmitters are available with
Modbus configuration, relay and touchscreen display.
The CDT2000 series transmitters calibrate themselves automati-
cally using ABC logic. The ABC
TM
which the transmitter 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 continuous compari-
son and the necessary adjustment accordingly. CDT2000-DC is also
suitable for buildings that are continuously occupied.
APPLICATIONS
CDT series devices are commonly used to monitor:
• CO and humidity levels in offices, public spaces, meeting rooms
2
SPECIFICATIONS
and classrooms
• CO levels of return air in ventilation systems
2
• incoming air and return air humidity levels in ventilation system
SPECIFICATIONS
Performance
Measurement ranges:
CO : 400–2000 ppm
2
Temperature: 0...50 °C
Relative humidity: 0–100 %
Accuracy:
CO : ±40 ppm + 3 % of reading, DC model: 75 ppm or
2
10 % of reading (whichever is greater)
Temperature: <0.5 ºC
Relative humidity: ±2...3 % at 0...50 °C and 10–90 % rH
Total error band includes accuracy, hysteresis and
temperature effect over 5...50 °C and 10–90 % rH.
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Measuring units:
ppm, °C and % rH
Measuring element:
CO : Non-dispersive infrared (NDIR)
2
Temperature: Pt1000 (models without rH-measurement
Integrated (models with rH-measurement)
Relative humidity: Thermoset polymer capacitive
sensing element
Calibration:
Automatic self-calibration ABC Logic
comparison (DC)
Environment:
Operating temperature: 0...50 °C
Storage temperature: -20...70 °C
Humidity: 0 to 95 % rH, non condensing
Copyright HK Instruments 2022
CARBON DIOXIDE TRANSMITTERS
CDT2000 Series
), utilizing the in-
2
, rH, T) has a sepa-
2
logic requires that the space in
TM
concentration drops to the out-
2
Physical
Dimensions:
Case: 99 x 90 x 32 mm
Weight:
150 g
Mounting:
3 screw holes slotted, 3.8 mm
Materials:
Case: ABS
Protection standard:
IP20
Display (Optional)
Touchscreen
Size: 77.4 x 52.4 mm
Electrical connections:
Power supply:
Relay out:
or continuous
TM
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 fire and/or explosion do not use in potentially
flammable or explosive atmospheres.
• Retain these instructions for future reference.
• This product, when installed, will be part of an engineered system
whose specifications and performance characteristics are not
designed or controlled by HK Instruments. Review applications
and national and local codes to assure that the installation will
be functional 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 time-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.
• humidity in various industrial applications
• temperatures in HVAC/R environment
• CDT2000-DC series devices can also be used in applications where
there is a constant source of carbon dioxide present (for example
hospitals and greenhouses)
5-screw terminal block
(24 V, GND, CO , rH, T)
2
0.2–1.5 mm (16–24 AWG)
2
3-screw terminal block
(NC, COM, NO)
0.2–1.5 mm (16–24 AWG)
2
www.hkinstruments.fi
Electrical
Input: 24 VAC or VDC, ±10 %
Current consumption: max 90 mA (at 24 V) +
10 mA for each voltage output or 20 mA for
each current output
Output signal (CO ,rH, temperature):
2
0–10 V, R>1 kΩ
2–10 V, R>1 kΩ
(optional 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
Installation version 9.0 2022
INSTALLATION
INSTRUCTIONS
RoHS
COMPLIANT