Yokogawa Low Concentration (ppm) Zirconia Oxygen Analyzer OX400 - Manual (Page 61)

<7. Inspection and Maintenance>
7-8
IM 11M10B01-01E
7.5 How to Replace the Line Filter
The line filter is inside the gas inlet connector on the rear panel. The line filter is covered by a plate,
and both these parts are held in place by a C-shaped snap ring. The following explains how to replace
the line filter. This requires a pair of snap ring pliers and some tweezers.
1) Insert the tips of the snap ring pliers in the holes on the snap ring and apply pressure to release
and remove the snap ring.
2) With the tweezers, remove first the plate and then the filter.
3) Attach the new filter, plate, and snap ring in this order.
• Insert the filter into the connector with the smooth side facing up.
• Place the plate over it with the fine mesh side facing down.
• With the snap ring pliers, apply pressure to insert the snap ring, and hold down and secure the
filter and plate in place with the snap ring. At this point, make sure you attach the snap ring firmly
in place so that the plate is secured enough that it cannot be moved even if an attempt to move it
with tweezers is made.
CAUTION
The snap ring must be securely attached to firmly hold the filter and plate in place. Otherwise, the filter
will not function correctly.
Gas Inlet
Filter
(K9643FB)
The smooth side facing up
The fine mesh side facing down
Plate
(K9213FB)
C-shaped snap ring
(Y9011EV)
Up
Dwon
Figure 7.6 How to Replace the Line Filter