CDT2000 Multifunctional CO2 Transmitters For Building Automation Systems

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Product Description

CDT series air quality transmitters are engineered for building automation systems in the HVAC/R industry. The CDT series measures carbon dioxide (CO2) utilizing the industry standard NDIR measurement principle, and temperature (T). Optional relative humidity (rH) measurement is also available in the same device. CDT series devices are available with large touchscreen display making conguration of the device quick and easy.

The CDT2000 series transmitters calibrate themselves automatically using ABC logicTM. The ABC logicTM requires that the space in which the transmitter is used needs to to be unoccupied for four hours per day so that the indoor CO2 concentration drops to the outside level. CDT2000-DC is a dual channel model with a measuring channel and a reference channel that makes a continuous comparison and the necessary adjustment accordingly. CDT2000-DC is also suitable for buildings that are continuously occupied.

CDT series devices include:

Separate eld congurable output for each measurement parameter (CO2, rH, T)
Proportional output options including: voltage (010 V, 210 V) and current (420 mA)

CDT2000 series device options offer:

2 x 3 touchscreen display
Field configurable relay for any of the three parameters
Modbus configuration

Specification

Accuracy:	CO₂: 40 ppm + 2 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater) Temperature: <0.5 C Relative humidity: 23 % rH at 050 C and 1090 % rH Total error band includes accuracy, hysteresis and temperature effect over 550 C and 1090 % rH
Measurement elements:	Pt1000 temperature sensor, Non Dispersive Infrared (NDIR) CO₂ sensor, thermoset polymer capacitive sensing element for humidity
Measuring units:	ppm, C, % rH
Calibration:	Automatic self-calibration, ABC Logic^TM or continuous comparison (DC)
Supply voltage:	24 VDC/VAC 10 %
Current consumption:	max 90 mA (at 24 V) + 10 mA for each voltage output or 20 mA for each current output
Output signal 1:	0/210 V (linear to CO₂), L min 1 k or 420 mA (linear to CO₂), L max 500
Output signal 2:	0/210 V (linear to rH), L min 1 k or 420 mA (linear to rH), L max 500
Output signal 3:	0/210 V (linear to Temp), L min 1 k or 420 mA (linear to Temp), L max 500
Optional relay output:	Potential free SPDT 250 VAC, 6 A / 30 VDC, 6 A with adjustable switching point and hysteresis
Operating temperature:	0+50C
Protection standard:	IP20