Installation Of Zh21B Dust Protector - YOKOGAWA ZR22G User Manual

Flow direction of the
sample gas
Notch
Probe top
Figure 3.4
<Detector with a probe protector (Model ZO21R-L-- *B for dust wear protect>
The detector is used with a probe protector to prevent the sensor from being worn by dust
particles when there is a high concentration of dust and gas flow exceeds 10 m/sec (pulverized
coal boiler or fluidized-bed furnace).
(1) Put a gasket (provided by the user) between the flanges, and mount the probe protector
in the probe insertion hole. The probe protector should be installed so that the notch is
downstream of the sample gas flow.
(2) Make sure that the sensor assembly mounting screws (four bolts) at the probe tip are not
loose.
(3) Where the detector is mounted horizontally, the reference gas and calibration gas inlet
should face downward.
CAUTION
When the probe protector is used in the ZR22G with pressure compensation (-P), instrument air
leaking from the probe protector may affect the measured value.
Direction of the sample gas flow
Probe top
Mount the protector so that the notch is
the downstream side of the gas flow.
Figure 3.5
3.1.4

Installation of ZH21B Dust Protector

(1) Put the gasket that is provided by the user between the flanges and mount the dust
protector in the probe insertion hole.
(2) Make sure that the cell assembly mounting screws (four) at the probe tip are not loose.
(3) Mount the detector so that the calibration gas inlet and the reference gas inlet face
downward.
1050,1550,2050
Φ60.5
Probe protector (supporting the mounting strength)
1050,1550,2050
Mounting of detector with a probe protector
<3. Installation>
Unit: mm
Gasket (t1.5)
Reference gas inlet
Calibration gas inlet
F3-3E.ai
Gasket (t1.5)
Unit: mm
Reference gas inlet
F3-4E.ai
Calibration gas inlet
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
3-4