Hollis Explorer User Manual - page 61
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The filter cap attaches to the filter body and is a push fit. The basic con-
struction of the filter starts with a specialist filter membrane in the cap (the
yellow material) backed up by a water absorbing material (the central
sponge like material in the picture).
NOTE: The filter cap retains the membrane (yellow materi-
al) that must NEVER be removed. The Sensor itself is not a
user serviceable part and damage may result if it is tampered
with. If the filter cap membrane becomes damaged it must be
replaced.
The yellow water absorbing material (center of picture) is removable. The
EXPLORER is supplied with spare absorbing material. Simply remove one
and refit a new one (Fig 3.23).
The absorbing material will become wet during a dive. The used absorbing
material can be dried out, preferably in an air-conditioned environment, as
it will become moist during a dive.
WARNING: Each absorbing material piece should only be used
for a maximum of 10 dive hours or if damage is noted, replaced
immediately or sooner if the readings from the CO
2
sensor are
not within the expected range (i.e. almost 0mb at the end of the
Pre-dive sequence with a new filter fitted).
DANGER: Failure to replace the absorbing material may result
in faulty CO
2
readings.
If debris is noted on the front face of the membrane (yellow material) or if
it is suspected that contamination is restricting the flow through the mem-
brane, it should be replaced.
Fig. 3.23
3
.1
4
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