Finishing Successful Calibration - MSA Altair 5X Mode D'emploi

3.8.3 Finishing Successful Calibration

Remove the calibration tube from instrument pump inlet.
• The calibration procedure adjusts the span value for sensors
that pass calibration.
• In the ALTAIR 5X IR, a combustible IR sensor calibration causes
the catalytic combustible sensor to enter the LockAlarm condition.
• While an instrument with a % Vol methane IR sensor
automatically recovers from LockAlarm, % Vol propane and
butane instruments do not; for these instruments, the
LockAlarm state is cleared by turning the instrument OFF, then
ON while in a fresh air environment.
• See Section 2.8.2 for additional details.
• On the color display, each successfully calibrated sensor
temporarily shows a √ symbol at its gas reading.
• These √ symbols remain visible for a few moments and are
then replaced by the present gas reading.
• The monochrome display does not show individual gas reading
√ symbols.
• Since residual gas may be present, the instrument may briefly go
into an exposure alarm after the calibration sequence is completed.
• Clear the alarm as necessary.
• A √ symbol displays on the MEASURE page.
• This √ symbol:
• appears on the color display in the upper feature bar
• appears on the monochrome display in the lower right corner
• remains on the display for 24 hours after the calibration
• goes OFF after 24 hours.
NOTE: If the horn alarm is turned OFF, the calibration √ symbol
does not appear on the color display.
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