Alarms; Combustible Gas (%Lel) - MSA ORION plus Betriebsanleitung

2.8 Alarms

Each measuring range has two alarms. The LO alarm is
non latching.

2.8.1 Combustible gas (%LEL)

plus
The ORION can be equipped to detect combustible
gases and vapours in the atmosphere. Alarms sound
when concentrations reach Alarm Setpoints or 100%
LEL (Lower Explosive Limit).
When the combustible gas indication reaches the
LO Alarm Setpoint:
- alarm sounds,
- alarm lights flash,
- % LEL label above the concentration flashes.
To silence the alarm, press the RESET button.
The LO alarm ist non latching.
When the combustible gas indication reaches the
HI Alarm Setpoint:
- alarm sounds,
- alarm lights flash,
- % LEL label above the concentration flashes.
This alarm cannot be reset with the RESET
button.
If 125 % LEL is reached or exceeded, LockAlarm
locks the display and the alarm, and:
- alarm sounds,
- alarm lights flash,
- Ex sensor – measuring range exceeded is displayed.
This alarm cannot be reset with the CHANGE/RESET
button.
If the 100% LEL alarm condition is reached, you may be in a life-threatening situation;
there is enough gas in the atmosphere for an explosion to occur. Leave and move
away from the contaminated area immediately.
After moving to a safe, fresh-air environment, reset the alarm by turning OFF the
instrument and turning it ON again.
Using the ORION
TM
plus 2
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