3-4
USER HANDBOOK
3.2 ACKNOWLEDGE GAS ALARMS
Once the gas reading has returned within the pre-set limits,
press and hold the button to silence the alarm sounder and
extinguish the gas LED’s.
Alarm Muting:
Mute ‘enabled’ silences alarm for 60 seconds.
Mute ‘disabled’ cannot silence the alarm until gas reading
returns within the pre-set limits.
If alarm conguration allows muting of audible alarm, the
following applies (see “Table 2.1 PS500 Alarms” on page
2-15):
• 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 returns within the pre-set
limits, the visual alarm clears automatically.
• Latching: If audible alarm has been muted and if
gas concentration during that time returns within the
pre-set limits, audible and visual alarms require to be
acknowledged to clear, after 60 seconds.
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