Specifications

GB
MSA DESCRIPTION
ALTAIR PRO - Operating Manual 13
The backlight turns ON for 20 seconds during an alarm condition.
If the gas concentration reaches or exceeds the alarm setpoint the instrument will
display and flash "
LO" or "HI" and "ALARM" and enter an alarm sequence.
For more and detailed information  Section 3.3.
2.4. Monitoring the Oxygen Concentration
With the ALTAIR PRO 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.
For more and detailed information  Section 3.4.
The LOW alarm (lower of the two %O
2
alarm settings) is latching and
will not reset when O
2
concentration rises above the LOW setpoint. To
reset alarm push the button
False oxygen alarms can occur due to barometric pressure (altitude)
changes or extreme changes in ambient temperature.
It is recommended that an oxygen calibration be performed at the
temperature and pressure of use. Be sure that the instrument is in
known fresh air before performing a calibration.