General Performance:
Storage Temperature Range ................-30 to +70 °C
Sensor Life Expectancy ........................> 15 years
Maintenance Interval ............................no maintenance required
Self-Diagnostics plete function check of the sensor module
Warm-up Time .....................................≤ 1 min
Operating Temperature Range ............0 to 50 °C
Operating Humidity Range ...................0 to 95% RH (non-condensing)
Operating Environment ........................Residential, commercial, industrial spaces and Potentially dusty air ducts used in
HVAC (Heating Ventilation and Air-Conditioning) systems.
Electrical / Mechanical:
Power Input...........................................4,5-14 VDC, stabilized to within 10% (external protection circuits required)
Current Consumption ............................40 mA average
< 150 mA peak current (averaged during IR lamp ON, 120 msec)
< 300 mA peak power (during IR lamp start-up, the first 50 msec)
Dimensions ........................................5,1 x 5,7 x 1,4 cm (Length x Width x approximate Height)
CO2 Measurement:
Sensing Method ....................................non-dispersive infrared (NDIR) waveguide technology with ABC
automatic background calibration algorithm
Sampling Method ..................................diffusion
Response Time (T1/e) ...........................20 sec diffusion time
Measurement Range ............................0 -5 000 ppmvol
Sensitivity..............................................± 20 ppm ± 1 % of measured value
Accuracy .............................................± 30 ppm ± 5 % of measured value
Pressure Dependence...........................+ 1.6 % reading per kPa deviation from normal pressure, 100 kPa
On-board calibration support.................Din1 switch input to trigger Background Calibration @ 400 ppm CO2
Din2 switch input to trigger Zero Calibration @ 0 ppm CO2
Linear Signal Outputs:
D/A Conversion Accuracy......................± 2 % of reading ± 20 mV
OUT1 D/A Resolution.........................10 mV
Linear Conversion Range ........0 -4 VDC for 0 -2 000 ppm vol.
Electrical Characteristics...........ROUT < 100 Ω, RLOAD > 5kΩ , Power input > 4,5 V
OUT2 D/A Resolution.........................5 mV
Linear Conversion Range ........1 -5 VDC for 0 -2 000 ppmvol.
Electrical Characteristics...........ROUT < 100 Ω, RLOAD > 5kΩ , Power input > 5,5 V
Digital Outputs:
Electrical Characteristics High Output level in the range 2.3V min to DVDD = 3.3V. (1 mA source)
............................. Low output level 0.75V max (4 mA sink). Protection 56R resistor in series.
Function .................................. High level at CO2 High
OUT3, CO2 High Alarm /Reset Level ... 800/700 ppm
OUT4, CO2 High Alarm /Reset Level ... 1000/900 ppm
UART Serial com port:
Protocol ...............................................MODBUS open protocol, refer specification and registers definitions
Hardware interface ...............................CMOS UART with RxD, TxD
Rate ......9600
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