Last Cal Date And Cal Due; Fresh Air Setup (Fas) - MSA ALTAIR 4X Operating Manual

Last CAL Date and CAL Due

These display options can be set by MSA Link software. If these options
are not set, these screens are not displayed.
• By default Last Cal is activated.
• By default Cal Due is deactivated

Fresh Air Setup (FAS)

The FAS screen is prompted (see Section 3.2.2)
3.2.2 Fresh Air Setup (FAS)
The Fresh Air Setup (FAS) is for automatic ZERO calibration of
the instrument.
The FAS has limits. The zero of any sensor that is outside of these
limits will not be adjusted by the FAS command.
If a battery charging cycle is interrupted before it is completed
(4 hours for a fully discharged battery), allow the instrument's
internal temperature to stabilize for 30 minutes before performing a
Fresh Air Setup.
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 haz-
ardous 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.
" WARNING
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