YOKOGAWA ZR202S, User Manual, Page: 46 / 163

<3. Installation>
3-8
IM 11M13A01-04E
3.1.8 Installation of the Probe Protector (ZO21R)
<Analyzer with a probe protector (Model ZO21R-L-

-

*B for dust wear protect>
The probe of the analyzer 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/s (fine-carbon
boiler or fluid bed furnace).
(1) Put the gasket that is provided by user between the flanges, and mount the probe protector in
the probe insertion hole. The probe protector should be installed so that the notch comes to the
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) When the probe is mounted horizontally, the calibration gas and reference gas inlet should face
downward.
Direction of the sample gas flow
Mount the protector so that the notch
is on the downstream side of gas flow.
Unit: mm
F3-4E.ai
1050, 1550, 2050
Gasket (t1.5)
Calibration gas inlet
Reference gas inlet
Probe top
Figure 3.6 Mounting of probe with a probe protector (Dust wear protect)
3.2 Installation of ZA8F Flow Setting Unit
3.2.1 Installation Location
The following should be taken into consideration:
(1) Easy access to the unit for checking and maintenance work.
(2) Near to the analyzer
(3) No corrosive gas.
(4) An ambient temperature of not more than 55°C and little changes of temperature.
(5) No vibration.
(6) Little exposure to rays of the sun or rain.