Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 55)

IM 11M12D01-01E 3-5
3. Installation
3.1.7 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 10m/s
(fine-carbon boiler or fluid-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 measurement gas flow.
(2) Make sure that the cell assembly mounting screws (four) 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 Zirconia Oxygen Analyzer version with
pressure compensation (-P), instrument air leaking from the probe protector may
affect the measured value.
Direction of the measurement gas flow
Mount the protector so that the notch is
or the downstream side of the gas flow.
Reference gas inlet
Calibration gas inlet
Unit: mm
F3.4E.EPS
Probe top
1050,1550,2050
Gasket (t1.5)
Figure 3.4 Mounting of detector with a probe protector