Product description
6
GRM
3 Product
description
The gas and smoke detector GRM monitors the concentration of ex-
plosive gases, vapours and/or smoke developments in the ambient
air. If the level of permissible gas or smoke concentration is ex-
ceeded at one of the connected sensors, a visual and audible alarm
is initiated at the control unit.
Application areas are, for instance, boiler rooms, offices, storage ar-
eas or in cellars and living rooms.
Control unit
a Green pilot lamp
b Without function
c Red alarm lamp
d Mute button
e Without function
Fig. 1: Control unit
The green pilot light indicates that the instrument is operational.
When an alarm condition occurs, the red alarm lamp lights up and
the buzzer sounds. The buzzer can be muted by pressing the mute
button. For safety reasons the alarm lamp remains on during the en-
tire alarm period. If the cause for alarm has been rectified, the alarm
lamp can be extinguished by pressing the mute button for a second
time.
The alarm is initiated via one of the connected sensors.
With fault conditions such as open circuit in the sensor connection
cable, the red alarm light blinks and the buzzer sounds.
The control unit incorporates voltage-free changeover relay contacts
for the connection of additional remote alarm units with appropriate
voltage supply, e.g. visual and audible alarm units. During normal
operation the relay is energised, in an alarm condition the relay is de-
energised (fail-safe principle).
