MSA Sirius Mode D'emploi page 63

Figure 6-2b. Ion Chamber Removal
5. Using the 2.8-ounce container of 'canned air' found in the
replacement kit, blow out any dust or dirt from the cell holder area
(FIGURE 6-3a).
NOTE: Hold the cleaner in a vertical position; do not shake. Hold
the instrument upright and with two to three short bursts,
blow any debris from the cell holder area.
6. Remove the new ion chamber from its package.
7. Use the "canned air" to ensure ion chamber cleanliness.
a. Use the extension tube to blow through the inlet holes.
b. Blow off any debris from the underside.
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