Replacing The Filters; Dust And Water Filter; Caution; Warning - MSA Sirius Mode D'emploi

Figure 6-4. Ion Chamber Installation
11. Replace the filter housing and tighten the screw.
12.Place the used ion chamber in the reclosable package and discard.
13.Turn ON the instrument and check the system for leaks by
plugging the inlet with a finger.
• The pump alarm must sound. See Chapter 3, 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
an indication that a sample may not be drawn to the sensors,
which could cause inaccurate readings. Failure to follow the
above can result in serious personal injury or death.

Replacing the Filters

When replacing external dust and water filters, prevent any
dust or dirt around the filter housing from entering the PID
sensor. Dust or dirt entering the PID sensor may impede or
degrade PID sensor performance, especially in humid envi-
ronments. Also, dust or dirt that gets pulled into the pump
unit may impede pump operation.

DUST AND WATER FILTER

1. Turn OFF the instrument and, while in a non-hazardous and non-
combustible area, remove the battery pack.
2. Unscrew the captive screw from the clear filter housing on the back
of the instrument to access the filters.
3. Carefully lift out the O-ring, the water filter, and the fibrous dust
filter from the recess on the filter housing.
4. Carefully install the new dust filter in the filter housing recess.

" WARNING

"

" CAUTION

"
6-9