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< 11. Inspection and Maintenance >
11-10
IM 11M12D01-01E
11.3.6 Replacement of O-ring
The detector uses three different types of O-rings (14), (21), and (22). One O-ring alone (14), or
two O-rings (21) and (22) are used. (For a pressure-compensating model, two O-rings are used for
individual uses. Two O-rings (21) and (22) are used for reference-gas sealing and require periodic
replacement.
Part No.
Description
(7)
K9470BJ
Metal O-ring
(14)
K9470ZS
Metal O-ring with grease
(21) (22)
K9470ZP
Two pairs of O-rings with grease
11.3.7 Cleaning the High Temperature Probe Adapter
CAUTION
Do NOT subject the probe of the High Temperature Probe Adapter (ZO21P) to shock.
This probe uses silicon carbide (SiC) which may become damaged if it is subjected to a strong shock
or thermal shock.
The high temperature detector is structured so that the gas to be measured is directed toward the
detector with the high temperature probe adapter. Therefore, if the probe or the sample gas outlet
clogs, a precise measurement is no longer possible because of no gas flow. If you use the high
temperature detector, you have to inspect it periodically and, if any part of it is significantly clogged
with dust, clean it.
Dust found sticking to the probe should be blown off. If any dust still remains after the blowing, clean it
with a metal rod, etc., inserted. In addition, if dust is found on the auxiliary ejector assembly or needle
valve (choke) at the sample gas outlet, remove these parts from the high temperature probe adapter
and then clean them. To remove dust, blow air on them or rinse them with water.
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