MSA altair 5, Руководство по эксплуатации, Страница: 21 / 221

US
MSA DESCRIPTION
ALTAIR 5 - Operating Manual
21
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
1:30 PM 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