Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 58)

IM 11M13A01-02E 3-7
3. Installation
3.1.7 Installation of the Detector
CAUTION
• The cell (sensor) at the tip of the detector is made of ceramic (zirconia). Do not drop
the detector, as impact will damage it.
• A gasket should be used between the flanges to prevent gas leakage. The gasket
material should be heatproof and corrosion-proof, suited to the characteristics of the
measured gas.
The following should be taken into consideration when mounting the general-use
detector:
<General-use detector>
(1) Make sure that the cell mounting screws (four) at the probe tip are not loose.
(2) Where the detector is mounted horizontally, the calibration gas inlet and the refer-
ence gas inlet should face downward.
3.1.8 Installation of the Probe Protector (ZO21R)
<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.
Direction of the measurement gas flow
Mount the protector so that the notch is
on the downstream side of the gas flow.
Reference gas inlet
Calibration gas inlet
Unit: mm
F3.05E.EPS
Probe top
1050
Gasket (t1.5)
Figure 3.5 Mounting of detector with a probe protector