GMI Personal Surveyor 200, User Handbook Manual, Page: 49 / 92

4-5
ALARMS
4.2 ACKNOWLEDGE GAS ALARMS
Once in a safe area, or the gas reading has returned within the
preset limits, press and hold the Right Hand (RH) button
to mute the alarm sounder and extinguish the gas LED’s.
4.3 MUTE ALARMS
If configured, a muted alarm will be silenced for 60 seconds.
Mute ‘disabled’ cannot silence the alarm until gas falls below
the alarm level.
If alarm configuration allows muting of audible alarm, the
following applies:
Non-latching: Once alarm has been muted, the audible
alarm is cancelled for a period of 60 seconds, and if gas
concentration during that time falls below alarm set point, the
visual alarm clears automatically.
Latching: If audible alarm has been muted and if gas
concentration during that time falls below alarm set point,
visual alarm requires to be acknowledged to clear.
4.4 HIGH FLAMMABLE GAS OVER-RANGE ALARM
Caution: Exposing the LEL sensor to concentrations of
flammable gas above 100% LEL can damage
the sensor.
In order to protect the user from danger in the event of the
flammable gas (LEL) sensor being over exposed to a high
concentration of flammable gas, the instrument has an over-
range alarm.