Dräger VarioGard User Manual

Factory default settings
On being started up for the first time, the system operates with the basic factory settings:
– The emergency power supply connection and the alkaline batteries of the central unit are not monitored.
– Mean values are calculated over a period of 30 minutes (for NO
2
15 minutes).
– Alarm threshold settings for the different transmitters:
The transmitter values for other gases are listed in the data sheet of the transmitter concerned.
Hysteresis of e.g. 10 ppm with a limit of e.g. 100 ppm means that the alarm is set at 100 ppm and reset if the
value falls below 90 ppm.
These default settings can only be altered by DrägerService.
Operation
Factory default settings
58
CO transmitter NH
3
transmitter O
2
transmitter NO transmitter NO
2
transmitter
Actual value Alarm A1
threshold
hysteresis
250 ppm
5 ppm
50 ppm
5 ppm
20 % by vol.
0.2 % by vol.
10 ppm
3 ppm
1 ppm
0.1 ppm
Actual value Alarm A2
threshold
hysteresis
250 ppm
5 ppm
200 ppm
20 ppm
19 % by vol.
0.2 % by vol.
15 ppm
3 ppm
2 ppm
0.2 ppm
Actual value Alarm A3
threshold
hysteresis
250 ppm
5 ppm
500 ppm
50 ppm
18 % by vol.
0.2 Vol.-%
20 ppm
3 ppm
3 ppm
0.3 ppm
Actual value Alarm A4
threshold
hysteresis
250 ppm
5 ppm
1000 ppm
100 ppm
17 % by vol.
0.2 % by vol.
20 ppm
3 ppm
5 ppm
0.5 ppm
Mean value Alarm A1
threshold
hysteresis
40 ppm
4 ppm
1200 ppm
0 ppm
0 % by vol.
0 % by vol.
50 ppm
5 ppm
1 ppm
0.1 ppm
Mean value Alarm A2
threshold
hysteresis
80 ppm
8 ppm
1200 ppm
0 ppm
0 % by vol.
0 % by vol.
50 ppm
5 ppm
2 ppm
0.2 ppm
Mean value Alarm A3
threshold
hysteresis
100 ppm
10 ppm
1200 ppm
0 ppm
0 % by vol.
0 % by vol.
50 ppm
5 ppm
3 ppm
0.3 ppm
Mean value Alarm A4
threshold
hysteresis
100 ppm
10 ppm
1200 ppm
0 ppm
0 % by vol.
0 % by vol.
50 ppm
5 ppm
5 ppm
0.5 ppm

Dräger VarioGard Specifications

General

Brand	Dräger
Model	VarioGard
Category	Control Unit
Language	English