MSA ALTAIR 5 Manual De Funcionamiento página 56

Figure 4-3. Sensor Replacement
1. Verify that the instrument is turned OFF.
2. Remove the battery pack.
3. Remove the two remaining case screws, and remove the
case front.
4. Gently remove the sensor to be replaced.
• Using fingers only, gently remove the tox, combustible or
oxygen sensor.
5. Carefully align the new sensor contact pins with the sockets on the
printed circuit board.
6. Press the new sensor into place.
• Ensure groove in combustible sensor is aligned with notch in
sensor slot.
• If a sensor is not to be installed, ensure that a sensor plug is
installed properly in its place.
7. If replacing sensor filter at this time:
• Carefully peel off old filter, taking care not to damage the inside
of the case.
• On new filter, peel off backing exposing adhesive. Note proper
orientation of filter and apply to inside of front case, adhesive
side against case.
• Press filter into place, taking care not to damage filter surface.
8. Re-install the sensor gasket in the case front.
• Ensure sensor gasket is properly installed.
9. Re-install the screws.
10. Go into the sensor setup and turn ON the sensor.
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