MSA SIRIUS Manuel D'instructions page 42

7 Warranty, Maintenance, and Troubleshooting
5. Remove the new ion chamber from its package.
6. Snap the ion chamber into the cell holder, with the four small, round holes facing up
as shown in Figure 22.
Figure 22: Ion Chamber Installation
7. Replace the ion chamber cover, aligning the notch to ensure proper orientation.
8. Check that the o-rings are seated in their proper locations (see 7.5 Replacing the
Filters).
9. Replace the filter housing and tighten the screw.
10. Place the used ion chamber in the reclosable package and discard.
11. Turn ON the instrument and check the system for leaks by plugging the inlet with a finger.
• The pump alarm must sound. See 3.9 Verifying Pump Operation.
Do not use the pump, sample line, or probe unless the pump alarm activates when the
flow is blocked. Lack of an alarm is at a sample may not be drawn to the sensors,
which could cause inaccurate readings.
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ION CHAMBER