Oxygen Measurements (% O 2 ) (Figure 3-6) - MSA Orion G Mode D'emploi

Operating Manual
If the 100% LEL or 5% CH
may be in a life-threatening situation; there is enough gas
in the atmosphere for an explosion to occur. In addition,
any rapid up-scale reading followed by a declining or erratic
reading can also be an indication that there is enough gas
for an explosion. If either of these indications occur, leave
and move away from the contaminated area immediately.
Failure to follow this warning can result in serious personal
injury or death.
Oxygen Measurements (% O
The Orion G Multigas
and Leak Detector can
be equipped to detect
the amount of oxygen
in the atmosphere.
• Two conditions
trigger the alarm:
• Too little
oxygen
(deficient)
• Too much
oxygen
(enriched).
• When the alarm
setpoint is reached
for either of the above:
• Alarm sounds
• Alarm lights flash
• % O
label above the concentration flashes.
2
If the Oxygen alarm condition is reached while using the
instrument as a personal or area monitor, leave the area
immediately; the ambient condition has reached a preset
alarm level. If using the instrument as an inspection device,
Chapter 3, Using the Orion G Gas Utility Instrument
" WARNING
alarm condition is reached, you
4
) (FIGURE 3-6)
2
Figure 3-6. Instrument in Oxygen Alarm
" WARNING
3-9