Dräger VarioGard, Инструкция по эксплуатации, Страница: 50 / 280

50 Dräger VarioGard
Technical data
Central unit
Weight approx. 2.2 kg
Measurement with cable entry
(L x W x H)
240 mm x 200 mm x 90 mm
Cable inlet M20 x 1.5; 6 mm to 12 mm
M25 x 1.5; 9 mm to 16 mm for
mains supply
Switching outlets 5 relay contacts x max. 5 A / 250 V AC
max. 3 A / 30 V DC
min. 0.1 A / 10 V AC/DC
Power supply 230 V AC / 115 V AC, 50/60 Hz
Fuses See information in unit
Power consumption below 55 W
Transmitter
Weight
Plastic housing
Aluminium housing
approx. 0.4 kg
approx. 1.0 kg
Dimensions with
cable inlet (L x B x H):
Plastic housing
Aluminium housing
120 mm x 110 mm x 60 mm
120 mm x 120 mm x 60 mm
Cable inlet M20 x 1.5; 6 mm to 12 mm
Operating voltage 16 to 30 V DC
Power consumption below 0.75 W
Measurement specifications:
Measuring
range Resolution
of display
Measuring error
1)
(the larger value applies in
each case)
1) The measuring errors indicated apply for room temperature and with fresh sensors for
a calibration interval of: 12 months for CO and NO; 6 months for O
2
, NO
2
and NH
3
.
CO transmitter 0...300 ppm

3 ppm < ±10 % of measuring value
O
2
transmitter 0...25 % by
vol.

0.1 % by
vol.

±0.4 % by vol. or

±10 %
of measured value
NO transmitter 0...50 ppm

1 ppm

±5 ppm
NH
3
transmitter
2)
2) 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 approx. 20 % or a reduction of
approx. 10 % over a period of 30 minutes. For lower concentrations of NH
3
gas. the
percentage change in the measuring signal may be less.
0...1200 ppm

10 ppm

±40 ppm or 10 % of
measurement value
NO
2
transmitter 0...50 ppm

0.1 ppm

±0.5 ppm or 10 % of
measurement value
Cat ex-sensor 0 ... 100 %LEL 1 %LEL < ±10 % of measuring value
IR ex-sensor 0 ... 100 %LEL 1 %LEL < ±5 % of measuring value
IR CO
2
-sensor 0 ... 5 vol. % 100 ppm < ±5 % of measuring value