Fresh Air Setup (Fas) At Instrument Turn-On - MSA Altair 5X Mode D'emploi

3.2.2 Fresh Air Setup (FAS) at Instrument Turn-ON

The Fresh Air Setup (FAS) is for instrument ZERO adjustment.
The FAS has limits. If a hazardous level of gas is present, the
instrument ignores the FAS command and the alarm activates.
The ability to perform an FAS at instrument turn-ON can be disabled by
using MSA Link software.
NOTE: The Fresh Air Setup does not apply to the CO 2 sensor.
Do not perform 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.
The instrument displays a flashing "FRESH AIR SETUP?", prompting
the user to perform a Fresh Air Setup:
1. Press the ▲ button to bypass the Fresh Air Setup.
• The Fresh Air Setup is skipped
• The instrument goes to the MEASURING page (MAIN page).
2. Press the ▼ button to perform the Fresh Air Setup.
• The FAS sequence starts and the FAS screen displays
• A progress bar shows user how much of the FAS is completed
• At the end of the FAS, the instrument displays:
"FRESH AIR SETUP PASS" or "FRESH AIR SETUP FAIL".
If the FAS fails, perform a zero calibration per Section 3.8.
3-4
! WARNING
Figure 3-1. Fresh Air Setup