GB
MSA DESCRIPTION
ALTAIR 5 - Operating Manual 23
2.6. Monitoring Toxic Gases
The instrument can monitor the concentration of a variety of toxic gases in
ambient air. Which toxic gases are monitored depends on the installed sensors.
The instrument displays the gas concentration in parts per million (ppm) or mg/m
3
on the Measuring page.
Warning!
If an alarm is triggered while using the instrument, leave the area
immediately.
Remaining on site under such circumstances can cause serious
personal injury or death.
The instrument has four gas alarms:
• HIGH Alarm
• LOW Alarm
• STEL Alarm
• TWA Alarm
1:30PM
MSA
HIGH ALARM
%
PPM
PPM
20
0
0.0
Vol %
PPM
20.8
0
CO
SO
2
COMB
Figure 2-11 Alarm Conditions (here High Alarm)
If the gas concentration reaches or exceeds the alarm setpoint, the instrument:
• the alarm message displays and flashes in combination with the
corresponding gas concentration
• backlight turns on
• alarm sounds
• alarm LEDs flash
• vibrating alarm triggers
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