G
Mounting and Installation
AERASGARD
®
RFTF - CO
2
– Room humidity, temperature, and CO
2
sensors and measuring transducers, Standard
AERASGARD
®
RTM-CO
2
– Room temperature and CO
2
measuring transducers, Standard
Type ⁄ WG02
Measuring Range
CO
2
Temperature
Humidity
Output
Features
Item No.
RFTF - CO
2
(3x)
without traffic light
RF T F - C O2
0...2000 ppm
+5...+40 °C
30...80 % r. H.
0 -10 V
1501-61B6-1001-301
RTM - CO
2
(2x)
without traffic light
R T M - C O2
0...2000 ppm
0...+50 °C
–
0 -10 V
–
1501-61B2-1001-301
R T M - C O2 VA
0...2000 ppm
0...+50 °C
–
0 -10 V
Stainless steel enclosure
1501-4112-1000-005
RTM - CO
2
- A
with traffic light
R T M - C O2-A
0...2000 ppm
0...+50 °C
–
0 -10 V
5x LED
1501-61B2-1031-301
R T M - C O2-2S 0...2000 ppm
+5...+40 °C
–
0 -10 V
3x LED, 2x Normally open contact
1501-4112-1060-000
A
= With “traffic light” (five coloured LEDs)
indicating CO
2
concentration.
Note:
This unit
must not
be used as safety-relevant device!
Switching thresholds
RTM - CO
2
- 2S
Potentiometers
Measuring range CO
2
RFTF - CO
2
Potentiometers
Traffic light indication
RTM - CO
2
- A
LED
CO
2
content
Green 1
< 500 ppm
Green 2
500 - 800 ppm
Yellow
800 - 1200 ppm
Red 1
1200 - 1600 ppm
Red 2
> 1600 ppm
Traffic light indication
RTM - CO
2
- 2S
LED
CO
2
content
Green
< 800 ppm
Yellow
800 - 1200 ppm
Red
> 1200 ppm
Switching thresholds
RTM - CO
2
- 2S
(adjustable)
S1
Lower limit
S2
Upper limit
1
1500 ppm
1100 ppm
2
600 ppm
1200 ppm
3
700 ppm
1300 ppm
4
800 ppm
1400 ppm
5
900 ppm
1500 ppm
Measuring range CO
2
RFTF - CO
2
(adjustable)
O V
10 V
S1
S2
Lower limit
Upper limit
1
0 ppm
1200 ppm
2
200 ppm
1400 ppm
3
400 ppm
1600 ppm
4
600 ppm
1800 ppm
5
800 ppm
2000 ppm
S1
S2
5
3
4
2 1
5
3
4
2 1
S1
S2
5
3
4
2 1
5
3
4
2 1
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 the changes in the CO
2
concentration and flow velocity of the air surrounding the sen-
sor, the reaction of the device to changes in the CO
2
concentration may appear with a delay. It is
absolutely necessary to choose the device mounting position to ensure that the air stream flows
around the sensor. Otherwise the gas exchange may be considerably delayed or prevented.
Manual calibration of carbon dioxide measurement
Manual calibration can be started by pressing the button. Afterwards, continuous operation for at
least 10 minutes with fresh air (CO
2
- content 300... 400 ppm) must be ensured. Manual calibration
of the output signal to 2.25 V (450 ppm = zero point) is started by pressing the "Manual calibration
CO
2
“ button (press for approx. 10 seconds). Calibration preparation is indicated by a blinking, red LED
beside the button. Setting the output to 2.25 V at actual ambient conditions automatically follows
thereafter. During this phase, the LED is permanently activated. The LED is deactivated after suc-
cessful calibration.
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.
