MSA Altair 5X Mode D'emploi page 51

• The message "SENSOR REFRESH" displays, followed by the
message "ZERO CALIBRATION".
• The "REFRESH" message does not appear if a
catalytic combustible sensor is not installed.
• ZERO calibration starts
• A progress bar shows the user how much of the calibration
is completed.
NOTE: During the first moments of a ZERO calibration, the
combustible sensor reading may be replaced by a moving
display of "PLEASE WAIT". This is normal.
• After the ZERO calibration completes, the instrument displays:
• "ZERO CALIBRATION PASS"
or
• "ZERO CALIBRATION FAIL".
• If the zero calibration passes, the instrument moves to the
SPAN calibration opportunity:
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