Copyright HK Instruments 2016
www.hkinstruments.fi
Installation version 3.0 2016
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 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.
SPECIFICATIONS
Thank you for choosing an HK Instruments CDT-MOD-2000 Duct
series carbon dioxide transmitter with Modbus interface. The
CDT-MOD-2000 Duct series is intended for use in commercial en-
vironments in HVAC/R applications.
CDT-MOD-2000 Duct is a carbon dioxide transmitter with temper-
ature output installed in air ventilation duct. Illuminated display en-
sures easy readability also from a distance. The CDT-MOD-2000
Duct has a screwless lid and an easily adjustable mounting flange
that make the installation of the device easy.
CDT-MOD-2000 Duct series devices are commonly used to monitor:
• CO
2
and temperature levels of incoming and return air in
ventilation systems
SPECIFICATIONS
Performance
Measurement ranges:
CO
2
: 400–2000 ppm
Temperature: 0...50 °C
Accuracy:
CO
2
: ±40 ppm + 2 % of reading
Temperature: <0.5 ºC
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Measuring units:
ppm and °C
Measuring element:
CO
2
: Non-dispersive infrared (NDIR)
Temperature: NTC10K
Environment:
Operating temperature: 0...50 °C
Storage temperature: -20...70 °C
Humidity: 0 to 95 % rH, non condensing
Physical
Dimensions:
Case: 119 x 100 x 44.7 mm
Probe: L=188 mm, d=12 mm
Weight:
150 g
Materials:
Case: ABS
Cover: PC
Probe: ABS
Protection standard:
IP54
Electrical connections:
4 spring loaded terminals
Power supply:
(24 V and GND)
12–24 AWG (0.2–1.5 mm
2
)
Modbus RTU:
A and B line
12–24 AWG (0.2–1.5 mm
2
)
Electrical
Supply voltage: 24 VAC or VDC ±10 %
Current consumption: max 230 mA (at 24 V) + 10 mA for
each voltage output
Communication
Modbus RTU, over RS485
Conformance
Meets requirements for CE marking:
EMC Directive: 2004/108/EC
RoHS Directive: 2002/95/EC
WEEE Directive: 2002/96/EC
INTRODUCTION
WARNING
APPLICATIONS
