Acknowledge Gas Alarms; Mute Alarms; High Flammable Gas Over-Range Alarm - 3M GMI PS200 Series Operation & Maintenance Manual

4.2. Acknowledge Gas Alarms

After the gas readings have returned to a safe level, press and hold the R button to clear all alarms.

4.3. Mute Alarms

If configured, muting the alarm will silence the audible alarm for 60 seconds, as follows:
• Non-latching alarm: silences the audible alarm for 60 seconds. If the gas reading during that time
falls below the alarm set point, the visual alarm clears automatically.
• Latching alarm: silences the audible alarm for a period of 60 seconds. If the gas reading during
that time falls below the alarm set point, the user must acknowledge the visual alarm to clear it.

4.4. High Flammable Gas Over-range Alarm

WARNING: HIGH OFF-SCALE READINGS MAY INDICATE AN EXPLOSIVE
CONCENTRATION.
An over-range alarm protects the user and the LEL sensor during exposures to high concentrations
of flammable gas. If the LEL reading exceeds 100% LEL (see
• monitor vibrates;
• displayed value changes to 4 rising arrows;
• display turns red;
• audible alarm tone changes;
• LED's flash quickly;
• DANGER OVERRANGE flashes on the display.
4-2
Figure 4-2: LEL HIHI Alarm
3M™ GMI™ PS200 PORTABLE GAS MONITOR
Figure 4-3: Over Range Alarm
64171, Rev. 10/May 2019
ALARMS
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