Transmitter
Weight approx. 0.4 kg
Dimensions with cable inlet 120 mm x 145 mm x 100 mm
Cable entry M20 x 1.5; 6 mm to 12 mm
Operating voltage 16 to 30 V DC
Power input < 2 W
Measurement specifications:
Measuring range Display Measuring error**
resolution (the larger value applies in each case)
– CO transmitter 0 ... 300 ppm ≤ 3 ppm ≤ ± 9 ppm
–O
2
transmitter 0 ... 25 % vol. ≤ 0.1% vol. ≤ ± 0.4 % vol. or ≤ ± 10 % of the measured value
– NO transmitter 0 ... 50 ppm ≤ 1 ppm ≤ ± 5 ppm
–NH
3
transmitter* 0 ... 1200 ppm ≤ 10 ppm ≤ ± 40 ppm or 10 % of the measured value
–NO
2
transmitter 0 ... 20 ppm ≤ 0.1 ppm ≤ ± 0.5 ppm or 10 % of the measured value
The measurement specifications of transmitters for other gas types can be found in the data sheet of the transmitter
concerned.
Technical Data
79
* The accuracy of measurement for the sensor is given for the short-term presence of NH
3
gas.
Because of the electrochemical reaction in the sensor, its measurement sensitivity changes as exposure to NH
3
gas concentration continues.
For 1000 ppm NH
3
gas there may be an increase in the measuring signal of about 20 % or a reduction of about 10 % over a period of
30 minutes. For lower concentrations of NH
3
gas the percentage change in the measuring signal may be less.
** The measuring errors indicated apply for a calibration interval of:
12 months for CO and NO
6 months for O
2
and NH
3
.
Battery module
Type of protection, housing IP 32, EN 60 529
Input voltage 115 V / 230 V, 50 to 60 Hz
Output voltage 28 V DC, max. 1.2 A
Power consumption < 15 VA
Maximum charging time (lead storage batteries exhausted) < 48 hours
Cable inlet M20 x 1.5; 6 mm to 12 mm
Weight Approx. 7 kg (with lead storage batteries)
Dimensions with cable inlet 190 mm x 245 mm x 125 mm (H x W x D)
VarioGard Relay Module see installation instructions 90 23 577
VarioGard Converter Module see installation instructions 90 23 578
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