Oxygen Measurements - MSA ALTAIR PRO Manual De Operación

MSA
3.4.

Oxygen Measurements

The ALTAIR PRO Detector can be purchased to measure the concentration of
oxygen in an atmosphere. The value displayed is percent by volume of oxygen in
the atmosphere.
High and low alarm setpoints can be configured to alarm in any combination of
oxygen:
! enrichment (greater than 20.8%) or
! depletion (less than 20.8%).
When an alarm setpoint is reached the alarm sequence is initiated.
Low alarm indicates:
! the lower %O
! a more urgent condition and the faster alarm sequence will be indicated
! "LO" "ALARM" displays.
The LOW alarm (lower of the two O
not reset when O
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.
GB
level of the two alarm settings
2
concentration rises above the LOW setpoint.
2
ALTAIR PRO - Operating Manual
alarm settings) is latching and will
2
OPERATION
23