Dräger VarioGard Instructions For Use Manual page 50

Technical data
Central unit
Weight
Measurement with cable entry
(L x W x H)
Cable inlet
Switching outlets
Power supply
Fuses
Power consumption
Transmitter
Weight
Plastic housing
Aluminium housing
Dimensions with
cable inlet (L x B x H):
Plastic housing
Aluminium housing
Cable inlet
Operating voltage
Power consumption
50
approx. 2.2 kg
240 mm x 200 mm x 90 mm
M20 x 1.5; 6 mm to 12 mm
M25 x 1.5; 9 mm to 16 mm for
mains supply
5 relay contacts x max. 5 A / 250 V AC
max. 3 A / 30 V DC
min. 0.1 A / 10 V AC/DC
230 V AC / 115 V AC, 50/60 Hz
See information in unit
below 55 W
approx. 0.4 kg
approx. 1.0 kg
120 mm x 110 mm x 60 mm
120 mm x 120 mm x 60 mm
M20 x 1.5; 6 mm to 12 mm
16 to 30 V DC
below 0.75 W
Measurement specifications:
Measuring
range
CO transmitter 0...300 ppm
O transmitter 0...25 % by
2
vol.
NO transmitter 0...50 ppm
2) 0...1200 ppm
NH transmitter
3
NO transmitter 0...50 ppm
2
Cat ex-sensor 0 ... 100 %LEL 1 %LEL
IR ex-sensor 0 ... 100 %LEL 1 %LEL
IR CO -sensor 0 ... 5 vol. %
2
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) The accuracy of measurement for the sensor is given for the short-term presence of NH
gas. Because of the electrochemical reaction in the sensor, its measurement sensitivity
changes as exposure to NH gas concentration continues. For 1000 ppm NH
3
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
percentage change in the measuring signal may be less.
Resolution
1)
Measuring error
of display
(the larger value applies in
each case)
 3 ppm
< ±10 % of measuring value
 0.1 % by  ±0.4 % by vol. or  ±10 %
vol. of measured value
 1 ppm  ±5 ppm
 10 ppm  ±40 ppm or 10 % of
measurement value
 0.1 ppm  ±0.5 ppm or 10 % of
measurement value
< ±10 % of measuring value
< ±5 % of measuring value
100 ppm < ±5 % of measuring value
, NO and NH
2 2
3
gas. the
3
Dräger VarioGard
.
3
3
gas,