Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 53)

IM 11M12D01-01E 3-3
3. Installation
3.1.4 Installation of the Dust Filter( Part No K9471UA), etc
CAUTION
• The dust filter is used to protect the Zirconia sensor from corrosive dust or a high
concentration of dust such as in utility boilers and concrete kilns. If a filter is used in
combustion systems other than these, it may have adverse effects such as response
delay. These combustion conditions should be examined carefully before using a
filter.
• The dust filter requires gas flow of 1 m/sec. or faster at the front surface of the filter
(K9471UA).
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 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),
л52 to 55 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
ЊC, it is recommended to use heat-resistant
coating on the threads to prevent seizing up. Name of the heat-resistant coating
material: NEVER SEIZE NICKEL SPECIAL”.
Additional length
SiC Carborundum filter
␾
51
32
10
F3.2E.EPS
Screw
Detector
Attach the filter
unit to the tip of
the detector
by screwing
it clockwise.
Unit : mm
Figure 3.2 Installation of the dust filter