Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 42)

<3. Installation>
3-3
IM 11M12A01-04E
The following should be taken into consideration when mounting the general-use detector:
(1) Make sure that the cell mounting screws (four bolts) at the probe tip are not loose.
If a dust filter (see Section 2.4.1) is used, make sure it is properly attached to the detector. Refer
to Section 3.1.4 for installation of the dust filter.
(2) Where the detector is mounted horizontally, the calibration gas inlet and the reference gas inlet
should face downward.
3.1.4 Installation of the Dust Filter (K9471UA), Dust Guard Protector (K9471UC)
Probe Protector (ZO21R)
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. The 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.
When you specify option code /F1, the detector is shipped with the dust filter mounted.
Follow this procedure when replacing the filter in 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 by putting it on the end of the detector and screw the dust filter clockwise.
Put a hook pin wrench (K9471UX), Ø52 to 55 in diameter, into the hole on the dust filter to fasten
or remove it.
Apply a heat-resistant coating (see Note 1) to the threads on the detector.
Where mounting dust filter 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 the heat-resistant coating on the threads to prevent seizing up.
Name of heat-resistant coating material: “Never-Seez Nickel Special”.
Ø51
32
10
Carborundum filter (SiC)
Increasing of insertion length
F31.EPS
Screw
Detector
Attach the filter unit to the tip of the
detector by screwing it clockwise.
Figure 3.2.1 Installation of the dust filter