Replacing The Ion Chamber; Caution; Warning - MSA Sirius Mode D'emploi

16.Never touch the lens surface with your fingers. If contact occurs,
repeat steps 6 through 13.
17.Gently insert the clean bulb, window first into the bulb sleeve of the
instrument.
Do not apply excessive pressure when seating the bulb. Too
much pressure may damage the detector and/or the bulb.
18.Push the open end of the rubber bulb holder onto the tip of the
bulb. Gently push it on until it is fully seated.
19.Before replacing the bulb access cap, ensure the o-ring that goes
around the bulb sleeve is in place. Replace the bulb access cap
and tighten with a coin until it completely bottoms (no longer turns).
• If using the tamper-resistant bulb access cap, the special tool
provided with the cap must be used.
Failure to tighten the bulb access cap fully may result in
leakage in the flow system, causing inaccurate readings.
20.Turn ON the instrument and check the system for leaks by
plugging the inlet with your finger.
• The pump alarm should sound immediately. See Chapter 3,
Verifying Pump Operation.
21.In a clean air environment, do a fresh air setup.
22.Allow the instrument to run for at least 15 minutes for the bulb to
stabilize.
23.Recalibrate the instrument according to Chapter 5, Calibration.
NOTE: If a PID Failed Span Cal still occurs or an acceptable
calibration cannot be performed, replace the PID bulb with
a new one.

Replacing the Ion Chamber

Replace the ion chamber:
• when Changes in RH (wet to dry and dry to wet) cause erratic
VOC readings with no analyte present
• if a PID Failed Span Cal still occurs after bulb replacement.

" CAUTION

"

" WARNING

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