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8.
ROUTINE MAINTENANCE
Dust and Water-block Filter
A filter, housed in a knurled nut, removes particles of dust and dirt and blocks water. Do
not insert objects into the water block filter as they may puncture the filter. The filter needs to be
replaced monthly or sooner if it turns brown. Replacement dust and water-block filters are
available as Part No. WF-505 (package of 5 filters). Models EGA-611/612 use WF-705 filters
only.
CAUTION:
Do not use a Gas-Explorer without a three-way or dust and water-block filter.
Do not use a three-way or dust and water-block filter with a puncture.
Inlet Dust Filter (IF-705)
Removal of the intake connector (used to attach the sampling system of choice) of the
detector exposes a metal filter pressfit onto the intake. These filters are not a substitute for dust
and water-block filters as they will not block water or remove very fine dust and dirt. If this filter
gets blocked, it may be cleaned with compressed air or replaced.
Water-stopper (WS-001)
The water-stopper (Figure 2) provides a quick way to continue
bar holing if water is encountered in a bar-hole. The water-stopper is
inserted between the dust and water-block filter and the bar hole probe.
A float inside the water-stopper is connected to a plunger which blocks
flow whenever the float is lifted by water. Water is released and the
plunger returned to its normal position by depressing a release push-
button.
Figure 1. WF-505.
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Figure 2. Water-stopper
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