S+S Regeltechnik AERASGARD RFTF-C02 Operating Instructions, Mounting & Installation page 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
ca. 0.2 Volt during the self-test. Gas inter-exchange in the sensor element
happens by diffusion. Depending on changes in the CO
velocity of the air surrounding the sensor, the reaction of the device to changes in
CO concentration may appear with a delay. It is absolutely necessary to choose
2
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 pro-
cedure takes 3 to 5 minutes, depending on ambient conditions. During this time,
the output analog voltage differs from the actual measured value.
Measuring range CO
2
(adjustable)
Lower limit
1 0 ppm
2
200 ppm
3
400 ppm
4 600 ppm
5 800 ppm
Measuring range CO
2
Potentiometers
4
3
2
1
4
3
2
1
Type ⁄ WG1 Measuring Range
CO
2
RFTF - CO
2
R F T F - C O 2 0...2000 ppm
RTM - CO
2
R T M - C O 2 0...2000 ppm
R T M - C O 2 VA 0...2000 ppm
RTM - CO
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 air quality (VOC).
Note: This unit must not be used as safety-relevant device!
. The output voltage (CO
2
concentration and flow
2
RFTF - CO
2
O V 10 V
S1 S2
Upper limit
1200 ppm
1400 ppm
1600 ppm
1800 ppm
2000 ppm
RFTF - CO
2
5
S1
5
S2
Temperature Humidity
+5 ...+ 40 °C 30...80 % r. H.
0 ...+ 50 °C –
0 ...+ 50 °C –
0 ...+ 50 °C –
+5 ...+ 40 °C –
Traffic light indication
LED
Green 1
output) amounts to
Green 2
2
Yellow
Red 1
Red 2
Traffic light indication
LED
Green
Yellow
Red
Switching thresholds
(adjustable)
1
2
3
4
5
Switching thresholds
Potentiometers
Output Features
(3x)
0 -10 V –
(2x)
0 -10 V –
0 -10 V Stainless steel enclosure
(2x)
0 -10 V 5x LED
0 -10 V 3x LED, 2x Normally open contact
RTM - CO
CO content
2
< 500 ppm
500 - 800 ppm
800 - 1200 ppm
1200 - 1600 ppm
> 1600 ppm
RTM - CO
CO content
2
< 800 ppm
800 - 1200 ppm
> 1200 ppm
RTM - CO
S1
Lower limit Upper limit
500 ppm 1100 ppm
600 ppm 1200 ppm
700 ppm 1300 ppm
800 ppm 1400 ppm
900 ppm 1500 ppm
RTM - CO
4 5
3
S1
2
1
4 5
3
S2
2
1
Item No.
without traffic light
1501- 4116-1001-000
without traffic light
1501-6112-1000-000
1501-4112-1000-005
with traffic light
1501-6112-1030-000
1501-4112- 1060-000
- A
2
- 2S
2
- 2S
2
S2
- 2S
2