MSA ALTAIR 5X Manual De Uso página 19

If the gas concentration reaches or exceeds the alarm set point or the STEL or TWA limits, the:
• Alarm message displays and flashes in combination with the corresponding gas concentration
• Backlight turns on
• Alarm sounds (if active)
• Alarm LEDs flash (if active)
• Vibrating alarm triggers (if active)
3.8 Monitoring Oxygen Concentration
The device monitors the oxygen concentration in ambient air. The alarm set points can be configured to activate on two
different conditions:
• Enriched - oxygen concentration > 20.8 vol % or
• Deficient - oxygen concentration < 19.5 vol %.
WARNING!
If an alarm is triggered while using the device, leave the area immediately. Remaining in the area under such
circumstances can cause serious personal injury or death.
When the alarm set point is reached for either of the above conditions the:
• Alarm message displays and flashes in combination with the corresponding gas concentration
• Backlight turns on
• Alarm sounds (if active)
• Alarm LEDs flash (if active)
• Vibrating alarm triggers (if active)
The LOW alarm (oxygen deficient) is latching and will not automatically reset when the O
LOW set point. To reset the alarm press the ▲ button. If the alarm is latching, the ▲ button silences the alarm for five
seconds. Alarms can be made latching or unlatching via MSA Link software.
False oxygen alarms can occur due to changes in barometric pressure (altitude), humidity 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 device
is in known fresh air before performing a calibration.
3.9 Monitoring Combustible Gases
The device can be equipped with a catalytic combustible sensor that detects a variety of combustible gases up to 100 %
LEL and displays the reading as either % LEL or % CH
The IR sensor displays the reading in % Vol or %LEL.
WARNING!
If an alarm is triggered while using the device, leave the area immediately. Remaining in the area under such
circumstances can cause serious personal injury or death.
The catalytic combustible, 25 % Vol Butane IR, and 100% LEL Propane IR sensors have two alarm setpoints:
• HIGH Alarm
• LOW Alarm
If the gas concentration reaches or exceeds the alarm set point, the device:
• Alarm message displays and flashes in combination with the corresponding gas concentration:
US
. The ALTAIR 5X IR can also contain an IR combustible sensor.
4
ALTAIR 5X / ALTAIR 5X IR
3 Description
concentration rises above the
2
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