MSA altair 5, Instruction Manual

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Following a successful calibration of >100% LEL IR sensors, the
unit must be turned OFF, then ON to clear the over-range alarm
"XXX" on the combustible LEL sensor.
3.8.4 Calibration Failure
If the instrument cannot calibrate one or more sensor(s), it goes into the
Calibration Failure page and remains in alarm for 10 seconds.
Sensors that could not be calibrated are indicated by dashed lines on
the concentration display.
If a sensor repeatedly fails calibration after the full calibration procedure
in this manual has been performed, replace the failed sensor.
3.8.5 Calibration with GALAXY Test System
The instrument can also be calibrated using the GALAXY Automated
Test System - contact MSA for a list of compatible gases and
concentrations. The instrument will return a on the display when all
sensors are successfully calibrated.
3.9 Instrument Shutdown
For instrument shutdown press and hold the button.
• The instrument:
• displays a blinking "HOLD BUTTON FOR SHUTDOWN"
• a progress bar showing the user how much longer to hold the
button to complete the shutdown.
Figure 3-9. Instrument Shutdown
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