MSA ALTAIR 4X Manuel D'utilisation page 42

• Ensure that the calibration cap is properly seated.
• Connect one end of the tubing to the calibration cap.
• Connect other end of tubing to the cylinder regulator (supplied
in the calibration kit).
4. Press the button to start the bump test then open the valve on
the regulator. The hourglass will flash and the sensors will respond
to the gas.
After the Bump Test completes, the instrument momentarily displays
"BUMP PASS" or "BUMP ERROR" along with the label of any sensor
that failed before returning to Measure mode. If the instrument fails the
Bump Test, perform a calibration as described in section 3.9.
• The √ symbol will be displayed in the Measure mode for 24 hours
after a successful Bump Test.
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