Description
MSA
ALTAIR 4X
GB
23
2.11 Monitoring Combustible Gases
The device can monitor these concentrations in ambient air:
- Methane
- Combustible gases
The device displays the gas concentration in % LEL or % CH
4
on the
Measuring page until another page is selected or the device is turned off.
The device has two alarm set points:
- HIGH Alarm
- LOW Alarm
If the gas concentration reaches or exceeds the alarm set point, the device:
- backlight turns on
- a vibrating alarm triggers
- displays and flashes the Alarm symbol and either the Minimum icon
[LOW alarm] or the Maximum [PEAK] icon [HIGH alarm]
- enters an alarm state.
The LOW alarm [oxygen deficient] is latching and will not automatically
reset when the O
2
concentration rises above the LOW set point. To re-
set the alarm press the
button. If the alarm condition still exists, the
button only silences the alarm for five seconds.
False oxygen alarms can occur due to changes in barometric pressure
[altitude] or extreme changes in ambient temperature.
It is recommended that an oxygen calibration be performed at the tem-
perature and pressure of use. Be sure that the device is in known fresh
air before performing a calibration.
Attention!
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.
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