DIGICONTROL- Gerätedatenblatt
F-EGQ-212
www.gfr.de
[ 81400 ]
Category: Field Units - Sensors
Transducers for CO2 and temperature
DIGICONTROL
F-EGQ-212, 222
Application
Abb.
Used for selective measurement of the CO2 content and the
temperature of the room air as the basis for demand-led ventilation. The
CO2 level serves as an indicator of exhaled air.
Infra-red-spectroscopic sensor as per VDMA sheet 24772. Screw
terminals for wire of up to 2,5 mm2. EGQ 212: Lower part of housing
with sensor tube (Ø 30 mm) of black, glass-fibre-reinforced
thermoplastic; yellow housing cover of thermoplastic. Includes fixing
bracket with seal for duct fitting. Depth of insertion: 40...166 mm.
EGQ 222: Housing 76 × 76 of thermoplastic; for fitting on walls; pure
white (RAL 9010).
Type
EGQ 212 F001
EGQ 222 F001
Fitted in
CO2 range
Temp. range
Voltage
Weight
kg
duct
room
0...2000 ppm
0...2000 ppm
0...50 °C
0...50 °C
24 V~/=
24 V~/=
0.3
0.3
Technical Data
Power supply 24 V~/=
Power consumption
Ready for operation
Accuracy:CO2 (T = constant)1)
Temperature
Output signals
CO2 (0...2000 ppm)
Temp. (0...50 °C)
Measurement cycle
Accessories
0303124 000*
0313347 001*
0370560 011
± 20%
<2W
within 2 min
± 20 ppm
± 0,3 °C
0...10 V, load > 2 kΩ
0...10 V, load > 2 kΩ
60 s
Permissible ambient temp.
Permissible ambient humidity
0...50 °C
0...95 %rh
without condensation
Degree of protection: EGQ 212 (at head) IP 54 (EN 60529)
EGQ 222
IP 30
Wiring diagram
Dimension drawing
Fitting instructions
EGQ 212
A05842
M04347
MV 505877
EGQ 222
A04674
M07634
MV 505878
Recessed junction box
Intermediate cover plate for 76 × 76 for EGQ 222
Cable screw fitting (Pg 11), of plastic, for cable of Ø 9...11 mm for EGQ 212
* Dimension drawing or wiring diagram are available under the same number
1)) At temperatures of 0...50 °C, the tolerance is ± 5% of the displayed value, i.e. at least ± 50 ppm.
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DIGICONTROL- Gerätedatenblatt
F-EGQ-212
www.gfr.de
Wiring diagram
EGQ 212
EGQ 222
CO2
T
2
0...10 V-
1
3
4
0...10 V-
24 V~/=
5
6
A04674a
Dimension drawing
140
34
Ø19
73
64
41,7
60
76
3,7
130...156
246
60
Ø30
37
Ø5,5
Ø6,1
26
42
54
54
14
75
3,7
3,3
76
10
M07634b
20
M04347d
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DIGICONTROL- Gerätedatenblatt
F-EGQ-212
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Operation
The CO2 measuring principle is based on infra-red spectroscopy. The greater the CO2 content
in the room air, the lower the penetration of infra-red light. The electronic evaluation unit
calculates the CO2 concentration from this.
10 V-
Engineering and fitting notes
Local safety regulations must be observed. The CO2 transducer must not be used for
measuring safety levels of gas.
The transducer should be fitted in a place that is representative of CO2 levels: normally, 1,5 to 2
0
2000
0
ppm CO
metres above floor level in the case of room transducers. The transducer should be located
0
°C
50
B02718c
where it has a good throughflow of air, as is the case with temperature sensors, for instance.
In any case, it should not be located nearer than about one metre to the room occupants,
because of the high CO2 content of exhaled air.
To prevent the exchange of gas between the surrounding air and the duct air, the duct housing should be well sealed.
2
LED EGQ 222
There is a 3 mm red LED in the sensor. The LED indicates the status of sensor.
Explanation of the various LED signals:-
LED activity
Explanation
ON time
OFF Time
0,1 s
0,3 s
14,9 s
0,7 s
Flashes continuously
Flashes continuously
On whilst zeroing
key is pressed
Flashes three times after zeroing
key has been released
0,2 s
Continuously on
Continuously off
Normal sensor operation
Warm-up time after power on
(results not stable)
Zeroing key pressed
Confirmation of zeroing
0,2 s
Error (results incorrect)
Sensor off
GFR - Gesellschaft für Regelungstechnik
und Energieeinsparung mbH
Kapellenweg 42
D-33415 Verl
phone: +49 (0) 5246 962-0
www.gfr.de / [email protected]
Löbstedter Str. 101
D-07749 Jena
phone: +49 (0) 3641 4697-0
[email protected]
07.2008 / Rev1
Copyright © GFR mbH 2008 / Änderungen vorbehalten
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DIGICONTROL DC-KRA-M8/21-21

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