S+S REGELTECHNIK AERASGARD RFTF-CO2 Bedienungs- Und Montageanleitung Seite 7

G
Mounting and Installation
ATTENTION!
The minimum CO concentration of outdoor air amounts to ca. 350 ppm (output
2
voltage = 1.75 V) in leafy, hardly industrialized areas. A sensor self-test is initiated
by above-atmospheric or below-atmospheric pressure or by exposure of the sensor
to more than 5000 ppm CO
0.2 Volt during the self-test. Gas inter-exchange in the sensor element happens by
diffusion. Depending on changes in the CO
surrounding the sensor, the reaction of the device to changes in CO
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.
Putting in operation
After switching on the device, a self-test and tempering period follows. This proce-
dure takes 3 to 5 minutes, depending on ambient conditions. During this time, the
output analog voltage differs from the actual measured value.
Type ⁄ WG1 Measuring Range
CO
2
RFTF - CO 0 ... 2000 ppm
2
RTM - CO 0 ... 2000 ppm
2
RTM - CO - Stainless steel enclosure
2
RTM - CO - A 0 ... 2000 ppm
2
RTM - CO - 2S
0 ... 2000 ppm
2
"Traffic light" (coloured LEDs) indicating air quality (CO
Note: This unit must not be used as safety-relevant device!
. The output voltage (CO output) amounts to ca.
2 2
concentration and flow velocity of the air
2
Temperature
+5 ...+ 40 °C
0 ...+ 50 °C
0 ...+ 50 °C
+5 ...+ 40 °C
Traffic light indication
LED
Green 1
Green 2
Yellow
concentration
2
Red 1
Red 2
Traffic light indication
LED
Green
Yellow
Red
Measuring range CO
(adjustable)
Switching thresholds
1
2
3
4
5
Switching thresholds
Potentiometers
Output
Humidity
30 ...80 % r. H. 3 x 0 -10 V
– 2 x 0 -10 V
– 2 x 0 -10 V
– 2 x 0 -10 V
).
2
RTM - CO
CO
0 - 500 ppm
500 - 800 ppm
800 - 1200 ppm
1200 - 1600 ppm
> 1600 ... > 2000 ppm
RTM - CO
CO
800 - 1200 ppm
> 2000 ppm
RTM - CO
2
S1
Lower limit
0 ppm
200 ppm
400 ppm
600 ppm
800 ppm
RTM - CO
4 5
3
S1
2
1
4 5
3
S2
2
1
Features
–
–
Stainless steel enclosure
5-LED - indicator (traffic light)
3-LED - indicator (traffic light),
2 x NO contact
- A
2
content
2
- 2S
2
content
2
< 800 ppm
- 2S
2
S2
Upper limit
1200 ppm
1400 ppm
1600 ppm
1800 ppm
2000 ppm
- 2S
2