User's Manual for ZR22G, ZR402G - Yokogawa

3-4
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.
Flow direction of the
sample gas
1050,1550,2050
Gasket (t1.5)
Unit: mm
Φ60.5
Notch
Probe top
Reference gas inlet
Calibration gas inlet
Figure 3.3 Probe protector (supporting the mounting strength)
F3-3E.ai
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.
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.
1050,1550,2050
Gasket (t1.5)
Unit: mm
Direction of the sample gas flow
Probe top
Mount the protector so that the notch is
the downstream side of the gas flow.
Figure 3.4 Mounting of detector with a probe protector
F3-4E.ai
Reference gas inlet
Calibration gas inlet
IM 11M12A01-02E
8th Edition : Jan.13,2012-00