Measuring Gas Concentrations; Combustible Gases (% Lel) (Figure 3-6) - MSA Orion Operation Manual

Operating Manual

Measuring Gas Concentrations

Combustible gases (% LEL) (FIGURE 3-6)

The Orion Multigas
Detector can be equipped
to detect combustible
gases in the atmosphere.
• Alarms sound when
concentrations reach:
• Alarm Setpoint
or
• 100% LEL
(Lower
Explosive Limit).
• When the
combustible gas
indication reaches the
Alarm Setpoint:
• Alarm sounds
• Alarm lights
flash
• % LEL label
above the
concentration flashes.
• To silence the alarm, press the CHANGE/RESET button.
NOTE: The alarm will stay silent if the alarm condition
has cleared.
• When the combustible gas indication reaches 100% LEL, the
TM
LockAlarm circuit locks the combustible gas reading and
alarm and:
• Alarm sounds
• Alarm lights flash
• 100 appears on the display and flashes.
• This alarm cannot be reset with the CHANGE/RESET button.
Chapter 3, Using the Orion Multigas Detector
Figure 3-6. Instrument in LEL Alarm
3-9