Installation Of The Detector; Installation Of The Dust Filter (K9471Ua), Dust Guard Protector (K9471Uc), Probe Protector Zo21R - YOKOGAWA ZR22G User Manual

(3) The detector probe should be mounted at right angles to the sample gas flow or the probe
tip should point downstream.
(vertical)
100 mm
(Note) When using the detector with pressure compensation, ensure that the flange gasket does not block the reference gas outlet on
the detector flange. If the flange gasket blocks the outlet, the detector cannot perform pressure compensation.
Where necessary, make a notch in the flange gasket. Confirm the outside dimensions of the detector in Section 2.2 before
installation.
When using the detector with ZH21B dust protector the diameter of the hole should be 80mm or larger.
Figure 3.1
3.1.2

Installation of the Detector

CAUTION
• The cell (sensor) at the tip of the detector is made of ceramic (zirconia). Do not drop the
detector, as impact will damage it.
• A gasket should be used between the flanges to prevent gas leakage. The gasket material
should be heatproof and corrosion-proof, suited to the characteristics of the sample gas.
The following should be taken into consideration when mounting the general use detector:
<General use detector>
(1) Make sure that the cell mounting screws (four bolts) at the tip of the detector are not loose.
If a dust filter (see Section "2.7.1
sure it is properly attached to the detector.
Refer to Section "3.1.3
(K9471UC), Probe Protector ZO21R" 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.
3.1.3 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 cement 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.
Bounds of the probe
insertion hole location
Flange matches
the detector size
*1
Note
100 mm
Illustrates an example of the probe insertion hole.
Installation of the Dust Filter (K9471UA), Dust Guard Protector
*1
Type
Standard
With dust filter
With probe protector 60.5 mm in diameter (Note)
With dust protector
(horizontal)
Four-hole flange
Dust Filter for the Detector (K9471UA)") is used, make
<3. Installation>
Outside diameter of detector
50.8 mm in diameter (Note)
51 mm in diameter (Note)
80 mm in diameter or longer (Note)
JIS flange
Eight-hole flange
(the detector with
dust protector)
F3-1E.ai
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
3-2