MSA ALTAIR 5 Operating Manual page 27

MSA
3.2.2 Fresh Air Setup (FAS)
The Fresh Air Setup (FAS) is for automatic ZERO calibration of the
instrument.
The Fresh Air Setup (FAS) has limits. If a hazardous level of gas is present,
the instrument ignores the FAS command and the instrument alarm
activates.
Do not perform a Fresh Air Setup within 30 minutes of removing the instru-
ment from charge. If the charge cycle is interrupted, do not perform a
Fresh Air Setup within 30 minutes. Fresh Air Setup can be performed
immediately if the charge cycle was completed (4 hours for a fully
discharged battery).
Do not activate the Fresh Air Setup unless you are certain you are in fresh,
uncontaminated air; otherwise, inaccurate readings can occur which can
falsely indicate that a hazardous atmosphere is safe. If you have any doubts
as to the quality of the surrounding air, do not use the Fresh Air Setup
feature. Do not use the Fresh Air Setup as a substitute for daily calibration
checks. The calibration check is required to verify span accuracy. Failure to
follow this warning can result in serious personal injury or death.
Figure 3-1
US
Fresh Air Setup
ALTAIR 5 - Operating Manual
WARNING
0
PPM
0
PPM
0.0
YES
OPERATION
SETUP
Vol%
COMB
PPM
0
CO
FRESH AIR SETUP ?
NO
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