HK Instruments CDT-MOD-2000 Duct Series Installation Instructions

INTRODUCTION
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 environ-
ments in HVAC/R applications.
CDT-MOD-2000 Duct is a carbon dioxide transmitter with tem-
perature output installed in air ventilation duct. Illuminated display
ensures 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.
The CDT-MOD-2000 Duct series transmitters calibrate themselves
automatically using ABC logic. The ABC
TM
space in which the transmitter is used needs to to be unoccupied
for four hours per day so that the indoor CO
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 continuous comparison and the necessary adjustment accordingly.
CDT-MOD-2000-DC Duct is also suitable for buildings that are con-
tinuously occupied.
APPLICATIONS
CDT-MOD-2000 Duct series devices are commonly used to monitor:
• CO and temperature levels of incoming and return air in ventilation
2
systems
SPECIFICATIONS
• CDT-MOD-2000-DC Duct series devices can also be used in
applications where there is a constant source of carbon dioxide
present (for example hospitals and greenhouses)
SPECIFICATIONS
Performance
Measurement ranges:
CO : 400–2000 ppm
2
Temperature: 0...50 °C
Accuracy:
CO : ±40 ppm + 2 % of reading, DC model: 75 ppm or
2
10 % of reading (whichever is greater)
Temperature: <0.5 ºC
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Measuring units:
ppm and °C
Measuring element:
CO : Non-dispersive infrared (NDIR)
2
Temperature: NTC10K
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 2019
CARBON DIOXIDE TRANSMITTERS
CDT-MOD-2000 Duct Series
logic requires that the
TM
concentration drops
2
Physical
Dimensions:
Case: 119 x 100 x 44.7 mm
Probe: L=188 mm, d=12 mm
Mounting:
With flange, adjustable 0...188 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)
0.2–1.5 mm
or continuous
TM
Modbus RTU:
A and B line
0.2–1.5 mm
Electrical
Supply voltage: 24 VAC or VDC ±10 %
Current consumption: max 230 mA (at 24 V) + 10 mA
for each voltage output
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.
(12–24 AWG)
2
(12–24 AWG)
2
www.hkinstruments.fi
Communication
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 significant bit sent
first
1 bit for parity
1 stop bit
Baud rate: selectable in configuration
Modbus address: 1−247 addresses selectable in
configuration menu
Conformance
Meets requirements for CE marking:
EMC Directive: 2014/30/EU
RoHS Directive: 2011/65/EU
WEEE Directive: 2012/19/EU
COMPANY WITH
MANAGEMENT SYSTEM
CERTIFIED BY DNV GL
= ISO 9001 = ISO 14001 =
Installation version 6.0 2019
INSTALLATION
INSTRUCTIONS
RoHS 2
2011/65/EU