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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 congured, a muted alarm will be silenced for 60 seconds.

Mute ‘disabled’ cannot silence the alarm until gas falls below

the alarm level.

If alarm conguration 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

ammable gas above 100% LEL can damage

the sensor.

In order to protect the user from danger in the event of the

ammable gas (LEL) sensor being over exposed to a high

concentration of ammable gas, the instrument has an over-

range alarm.

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GMI PS241 Specifications

General