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DESCRIPTION MSA
10 ALTAIR Operating Manual
2.4. Monitoring the oxygen concentration
With the ALTAIR, the oxygen concentration is monitored in the atmosphere. The
alarm setpoints can be set to enrichment (concentration > 20.8%) or depletion
(concentration < 20.8%).
Attention!
If an alarm is triggered while using the instrument as a monitor, leave
the area immediately.
Remaining on site under such circumstances can cause serious
damage to health or can even lead to death.
When a set value is reached, an alarm is triggered:
an acoustic signal sounds,
alarm LEDs flash,
a vibration alarm is triggered and
in the display, "
ALARM" is displayed in combination with "LO" or "HI"
and the corresponding oxygen concentration.
In the event of extreme changes in the air pressure or the atmospheric
temperature, a false alarm can be triggered.
Therefore, calibrate the instrument under conditions of use.
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