S+S Regeltechnik AERASGARD RTM - CO2 Notice D'instruction page 7

G
Mounting and Installation
ATTENTION !
The minimum CO concentration of outdoor air amounts to ca. 350 ppm (output voltage = 1.75 V)
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in leafy, hardly industrialized areas. Gas inter-exchange in the sensor element happens by diffusion.
Depending on the changes in the CO
sor, the reaction of the device to changes in the CO
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
of the output signal to 2.25 V (450 ppm = zero point) is started by pressing the "Manual calibration
CO " button (press for approx. 10 seconds). Calibration preparation is indicated by a blinking, red LED
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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.
AERASGARD ® RTM-CO
Type ⁄ WG02 Measuring Range
CO
2
RTM - CO
2
R T M - C O 2 0...2000 ppm
R T M - C O 2 VA 0...2000 ppm
RTM - CO - A
2
R T M - C O 2 - A 0...2000 ppm
R T M - C O 2 - 2 S 0...2000 ppm
A = With "traffic light" (five coloured LEDs) indicating CO
Note: This unit must not be used as safety-relevant device!
concentration and flow velocity of the air surrounding the sen-
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concentration may appear with a delay. It is
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- content 300... 400 ppm) must be ensured. Manual calibration
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– Room temperature and CO
2
Output
Temperature (2x)
0...+50 °C 0 -10 V
0...+50 °C 0 -10 V
0...+50 °C 0 -10 V
+5...+40 °C 0 -10 V
measuring transducers, Standard
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Features
–
Stainless steel enclosure
5x LED
3x LED, 2x Normally open contact
concentration.
2
RTM - CO
Traffic light indication
LED CO
Green 1
Green 2 500 - 800 ppm
Yellow 800 - 1200 ppm
Red 1 1200 - 1600 ppm
Red 2 > 1600 ppm
Traffic light indication RTM - CO
LED CO
Green
Yellow 800 - 1200 ppm
Red > 1200 ppm
RTM - CO
Switching thresholds
(adjustable)
S1
Lower limit
1 1500 ppm
2 600 ppm
3 700 ppm
4 800 ppm
5 900 ppm
RTM - CO
Switching thresholds
Potentiometers
4 5
3
S1
2
1
4 5
3
S2
2
1
Item No.
without traffic light
1501-61B2-1001-301
1501- 4112- 1000- 005
with traffic light
1501-61B2-1031-301
1501- 4112-10 60-000
- A
2
content
2
< 500 ppm
- 2S
2
content
2
< 800 ppm
- 2S
2
S2
Upper limit
1100 ppm
1200 ppm
1300 ppm
1400 ppm
1500 ppm
- 2S
2