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6-5. Filter replacement
Replace the filter if it is contaminated. Follow
the replacement procedure given below.
(1) Check that the power is turned off.
(2) Remove the rubber protection cover.
(3) With the display facing downward,
remove four screws.
(4) Open the case.
(5) Remove the rubber seal and filter
referring to the below figure, and
replace them with new ones.
(6) After replacement, reattach the case
and tighten the screws.
(7) Attach the rubber protection cover.
CAUTION
Turn off the power of the gas monitor before replacing
the filter.
CAUTION
When reattaching the case, be careful not to catch
foreign matters by the rubber seal around the case.
Rubber seal
Water-proof filter
Upper case
CAUTION
When you are inserting the
packing to gas monitor, note
the direction . Refer to the
figure on the right.
Rubber seal
Filter CF-1821
Sensor side
Upper case side
