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S-CO2DT
(mm)
IMPORTANT: Read these in-
!
structions before installation and
wiring of the product.
CO
sensing element
2
air flow direction
Systemair AB
739 30 Skinnskatteberg, Sweden
Tel:+46 222 440 00 Fax:+46 222 440 99
INSTRUCTION
CO
-transmitter for duct mounting
2
CO2DT is a transmitter for measuring carbon dioxide (CO
centration in exhaust air. Measuring range 0...2000ppm (CO2DT) or
0...5000ppm (CO2DT-5). Output signal 0...10 V or 4...20 mA for the
full measuring range.
CO2DT is intended for duct mounting.
For 4...20 mA, use the U/I switch located in the transmitter.
Technical data
Measuring principle
NDIR (Non-Dispersive Infrared
Technology)
Measuring range
CO2DT
0...2000 ppm
CO2DT-5
0...5000 ppm
Inaccuracy at 20°C
CO2DT
< ±(50 ppm + 2% of the measured value)
CO2DT-5
< ±(50 ppm + 3% of the measured value)
Temp. influence
typ. 2 ppm / K
Long term stability
typ. 20 ppm / year
Time constant
< 120 seconds
Warm-up time
< 5 minutes
Mounting
CO2DT should be mounted at a place in the duct where it can be
expected to give a representative reading. The transmitter should be
placed at least 4 duct diameters after a bend for minimal turbulence.
Ambient temperature
-5...50°C
Humidity
0...90 % RH non condensating
Protection class
IP65 with probe downwards,
otherwise IP20
Open the front cover by removing the screws on the cover with a
screwdriver.
Wiring
Supply voltage 24 V AC ±20%, 50...60 Hz or 15...35 V DC.
Consumption 3 W.
Terminal 1
Supply voltage 24 V AC/DC or 15...35 V DC
Terminal 2
System neutral
Terminal 3
Signal neutral
Terminal 4
0...10 V DC or 4...20 mA out, CO
0...2000 ppm (CO2DT) or 0...5000 ppm (CO2DT-5)
N.B. System neutral and signal neutral are internally connected.
Start-up
After applying power to CO2DT, it will take a few minutes before it
shows correct values.
CO2DT is factory calibrated before delivery and does not need
) con-
2
to be calibrated at installation.
CO2DT is calibrated automatically, which means that manual
recalibration is not required during the lifetime of the sensor.
This product conforms to the requirements of European EMC
standards CENELEC EN 61000-6-1 and EN 61000-6-3 and car-
ries the CE mark.
, corresponds to
2
INSTRUCTION
Calibration
EMC emission & immunity standards
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