Installation Of The Probe; Installation Of The Dust Filter (K9471Ua), Dust Guard Protector (K9471Uc) Probe Protector (Zo21R) - YOKOGAWA ZR402G User Manual

(1) Do not mount the probe with the tip higher than the probe base.
(2) If the probe length is 2.5 m or more, the detector should be mounted vertically (no more than
a 5° tilt).
(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.
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 Probe

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 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 3.1.3 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)
<Procedures for installing the dust filter (K9471UA)>
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.
Bounds of the probe
insertion hole location
Flange matches
the detector size
*1
Note
100 mm
Illustrates an example of the probe insertion hole
*1
Type
Standard
With dust filter
With probe protector 60.5 mm in diameter (Note)
With dust protector
(horizontal)
Four-hole flange
<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 11M12A01-04E 11th Edition : Jul. 19, 2017-00
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