GB
OPERATION MSA
44 ALTAIR 5 - Operating Manual
3.9.3 Finishing Calibration
(1) Close the valve on the regulator.
(2) Remove the calibration cap or tube from pump inlet.
The calibration procedure adjusts the span value for any sensor that passes the
calibration test. Sensors that fail calibration are left unchanged.
Since residual gas may be present, the instrument may briefly go into an
exposure alarm after the calibration sequence is completed.
3.9.4 Autocalibration 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 combustible sensor.
3.10. Instrument Shutdown
For instrument shutdown press and hold the button.
65%
Figure 3-10 Instrument Shutdown
The instrument displays a blinking "HOLD BUTTON FOR SHUTDOWN"
and a progress bar shows the user how much longer to hold the button to
complete the shutdown.
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