G
Mounting and Installation
ATTENTION!
The minimum CO
2
concentration of outdoor air amounts to ca. 350 ppm (output voltage = 1.75 V) in leafy, hardly industrialized areas. Gas inter-
exchange in the sensor element happens by diffusion. Depending on changes in the CO
2
concentration and flow velocity of the air surrounding the
sensor, the reaction of the device to changes in CO
2
concentration may appear with a delay. It is absolutely necessary to choose the device mounting
position so that the air stream “presses” into the duct tube. Otherwise, below-atmospheric pressure will develop in the duct tube that may cause a
substantial slow down of gas exchange or even prevent it.
Manual calibration of carbon dioxide measurement
Due to the dual-beam measuring system used, automatic calibration is not used. Instead, the output value can be corrected by up to ± 500 ppm by
means of the corresponding calibration potentiometer if required.
Putting in operation
After switching on the device, a self-test and tempering period follows. This procedure takes 3 to 5 minutes, depending on ambient conditions. During
this time, the output analog voltage differs from the actual measured value.
Connecting diagram
KTM - CO
2
- SD - TYR2
Connecting diagram
KCO
2
- SD - TYR2
Schematic diagram
KCO
2
- SD - TYR2
KTM - CO
2
- SD - TYR2
1
2
3
4
5
6
UB+ 24V AC/DC
Output CO
2
0-10V in ppm
UB– GND
GND
n.c.
in °C
Output temperature 0-10V
1
2
3
UB+ 24V AC/DC
Output CO
2
0-10V in ppm
UB– GND
OFFSET
°C
CO²
1
ON
DIP
1 2 3
4 5 6
CO²
sensor
Output t
emper
atur
e in °C
n.c.
GND
–UB GND
Output CO
² in ppm
+U
B 2
4V A
C/
DC
DIP 1
ON = 5000 ppm
OFF = 2000 ppm
AERASGARD
®
KCO
2
- SD - TYR 2
–
Duct CO
2
sensors, Standard
AERASGARD
®
KTM - CO
2
- SD - TYR 2
–
Duct CO
2
measuring transducers, Standard
Type ⁄ WG02
Measuring Range
CO
2
Temperature
Output
CO
2
Temperature
Item No.
KCO
2
- SD - TYR2
(switchable)
K C O2- SD -U T Y R2
0...2000 ⁄ 5000 ppm
–
0 -10 V
–
1501-8110-1000-300
KTM - CO
2
- SD - TYR2
(switchable)
K T M - C O2- SD -U T Y R2
0...2000 ⁄ 5000 ppm
0...+50 °C
0 -10 V
0 -10 V
1501-8112-1000-300
Note:
This unit
must not
be used as safety-relevant device!
