< 3. Installation >
3-4
IM 11M12D01-01E
4-
Ø6
122
Ø50.8
100
Unit : mm
Increasing of insertion length
F3-3E.ai
Figure 3.2.2 Installation of the dust guard protector
<Detector with a probe protector (Model ZO21R-L-200-
*B for enhance forth>
The detector is used with a probe protector to support the probe (ZR22G) when the probe length is 2.5
m or more and it is mounted horizontally.
(1) Put a gasket (provided by the user) between the flanges, and mount the probe protector in the
probe insertion hole.
(2) Make sure that the sensor assembly mounting screws (four bolts) at the tip of the detector are
not loose.
(3) Mount the detector so that the reference gas and calibration gas inlet faces downward.
2050
Notch
Unit: mm
F3-4E.ai
Gasket (Thickness 3.0)
Reference gas inlet
Calibration gas inlet
Flow direction of the sample gas
Ø60.5
Probe top
<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.
When the probe length of the ZR22G is more than 2m, consult Yokogawa.
NOTE
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.
Figure 3.3 Probe protector (supporting the mounting strength)
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