Dräger VarioGard Gebrauchsanweisung Seite 59

If the concentration at one or more transmitters exceeds an alarm
threshold:
Alarms A1, A2 and A3 are not self-locking and cannot be acknowledged.
1 The LED on the central unit and on the transmitter concerned flashes
according to the particular alarm; see table.
Display on central unit e.g.:
If several transmitters are in alarm state at the same time, all the
transmitters in alarm state will be shown on the display one after the other.
The alarm relays are switched according to the particular alarm; see table.
Alarm states table (factory default settings)
Alarm LED
no red
power
None green
A1 red
A2 red
A3 red
A4 red
Once the concentration drops below the A1, A2 or A3 alarm threshold
less hysteresis again, the LED on the transmitter and on the central unit is
extinguished and the relays are returned to the normal state.
Alarm A4 can be acknowledged:
– The acoustic warning on the central unit can be switched off:
u
Press the [ ] key on the central unit. The acoustic warning on the
central unit is then switched off and Relay 4 returns to the normal state.
t
Press the [ ] key on the transmitter. The acoustic warning on the
transmitter is then switched off.
– The acoustic warning is switched off automatically after 2 minutes.
– With the factory basic settings the acoustic warning on the transmitter is
switched off.
Acoustic Relay 1 Relay 2
alarm
no closed closed
no open open
no closed open
no closed closed
no closed closed
yes closed closed
Operation
1
ESC
VarioGard
Transmitter
68 ppm NH3
Relay 3 Relay 4
closed closed
open open
open open
open open
flashing open
flashing closed
ESC
1
VarioGard
4
I A1
Relay 5
closed
open
open
open
open
open
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