YOKOGAWA ZR22G User Manual page 62

When you specify option code /F1, the detector is shipped with the dust filter mounted.
Follow this procedure replace the filter on the detector . It is recommended that you read Chapter
"11. Inspection and Maintenance" prior to filter mounting, for it is necessary to be familiar with
the detector's construction, especially the sensor assembly.
(1) Mount the dust filter assembly by putting it on the end of the detector and screw the
assembly clockwise. Put a hook pin wrench (K9471UX), Ø52 to Ø55 in diameter, into the
hole on the assembly to fasten or remove it.
Apply a heat-resistant coating (see Note 1) to the threads on the detector.
When remounting filter assembly after having once removed it from the detector, reapply the
heat-resistant coating.
Note 1: As the detector is heated to 700°C, it is recommended to use heat-resistant coating on the threads to prevent seizing up.
Name of the heat-resistant coating material: NEVER SEEZ Nickel Special".
Carborundum filter (SiC)
Attach the filter unit to the tip of
the detector by screwing it clockwise.
Figure 3.2 Installation of the dust filter
< Procedures for installing the dust guard protector (K9471UC)>
The ZR22G detector is shipped with the dust guard protector when the option code / F2 is
specified in case of ordering the detector. The protector should be used when preventing dusts
and water drops from lowering the detector performance is desired.
Screw the protector on the top of the detector so as to cover the top. When attaching or detaching
the protector, perform by hooking holes of its side with a hook pin wrench for Ø52 to Ø55 hole
(Pin diameter 4.5 mm: P/N K9741UX or the like) or by pass a screwdriver through the holes.
When re-attaching the protector after detaching it, apply the "NEVER SEEZ Nickel Special" to it.
Increasing of insertion length
100
4- 6
Ø
122
Figure 3.3
<Detector with a probe protector (Model ZO21R-L-- *B for enhance forth>
The detector is used with a probe protector to support the probe (ZR22G) when the probe length
is 2.5 m or more and it is mounted horizontally.
(1) Put a gasket (provided by the user) between the flanges, and mount the probe protector in
the probe insertion hole.
(2) Make sure that the sensor assembly mounting screws (four bolts) at the tip of the detector
are not loose.
(3) Mount the detector so that the reference gas and calibration gas inlet faces downward.
32
Detector
Screw
10
Increasing of insertion length
F3-2E.ai
F11-1.ai
<3. Installation>
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
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