Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 204)

IM 11M12D01-01E 11-10
11.3.5 Replacement of filter assembly
Set the filter assembly (1) in place using a special pin spanner (with a pin 4.5 mm in
diameter: part no. K9471UX or equivalent). If a filter assembly that has already been
replaced once is used again, apply grease (NEVER-SEEZ: G7067ZA) to the threads of
the filter assembly.
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.
T11.1E.ESP
Part No. Description
(7) K9470BJ Metal ring
(14) K9470ZS Metal ring with grease
(21) Two pairs of O-rings
(22) with grease
K9470ZP
11.3.7 Cleaning the High-temperature Probe Adapter
CAUTION
• Do NOT subject the probe of the High-temperature Probe Adapter (ZO21P-H-A) 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 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.