MSA Altair 5X Mode D'emploi page 48

Bump Tests:
• IR Butane 25% Vol - 2% Vol Butane Cal Check gas
• IR Propane 100% Vol - 8% Propane Cal Check gas
• IR Methane 100% Vol - 20% Methane Cal Check gas.
1. While the instrument is turned ON in a clean, fresh air
environment, verify that readings indicate no gas is present.
2. From the normal Measure screen, press the ▼ (BUMP) button to
display "BUMP TEST?".
Verify that displayed gas concentrations match the Calibration
Check Gas Cylinder. If they do not, adjust the values through the
Calibration Setup menu as described in Section 3.4.1.
Depending on the sensors installed, there could be one to five
separate Bump Tests performed, each with a different cylinder,
regulator, and tubing used.
3. Attach the demand regulator (supplied in the calibration kit)
to the cylinder providing the indicated gases.
4. Connect tubing (supplied in the calibration kit) to the regulator.
5. Attach the other end of tubing to the instrument pump inlet.
6. Press the
• the progress bar advances
• the sensors respond to the gas.
The message "BUMP TEST PASS" indicates a successful
Bump Test of the sensors.
If any sensor fails the Bump Test:
• the message "BUMP TEST FAIL" appears
• the failed sensor is indicated.
7. If there are more sensors to be Bump Tested, the next sensor
displays and the process repeats from Step 3 in this Section.
8. If there are no more sensors to be Bump Tested, the tubing can be
removed from the instrument pump inlet.
9. In the ALTAIR 5X IR, Bump Testing of a combustible IR sensor
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 or butane
instruments do not. For these instruments, clear the LockAlarm
state by turning the instrument OFF, then ON while in a fresh air
environment. See Section 2.8.2 for additional details.
button to start the Bump Test:
3-17