YOKOGAWA ZR22P, User Manual

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IM 11M12A01-01E-A
The installation requirements of the ZR22G Zirconia Oxygen Detector should be consistent with
the procedures outline in Section 4.1. Further installation instructions can be found in the ZR22G
Instruction manual IM 11M12A01-02E, Chapter 3.
It is recommended that the detector be mounted vertically. If it is necessary to mount the 1.
detector horizontally, ensure that the probe tip is placed no higher that the probe base. Figure
4.2.
When installing the high temperature probe adapter, be sure to insert a gasket between the
2.
flanges to prevent gas leakage, Table 4.1. When the process pressure is negative, ensure that
there is no leakage of air into the process.
When mounting the detector in a position other than vertical, the cable inlet should face
3.
downward.
When installing the detector in a low ambient temperature location, such as in cool open air,
4.
cover the probe adapter including the eductor with a heat insulator (e.g. ceramic wool) to keep
the assembly warm. This will help to prevent condensation from entering the eductor and probe.
Figure 4.2
4.3 Usage of the ZR22P High Temperature Probe Adapter
During analysis, the surface temperature of the probe adapter should be within the range from the
dew point of the measured gas to prevent eductor clogging, gasket deterioration and bolt scoring.
Where the dew point of the measured gas is not known, keep within the range of 200ºC to 300ºC
(392ºF to 592ºF).
The temperature shall be measured at the probe in the probe adapter and the surface of the blind
flange at the opposite side.
When the surface temperature is not within the above specified range, the following measures can
be taken to change the temperature:
(1) When the surface temperature exceeds 300ºC (572ºF):
When the process pressure is negative, lower the pressure setting to reduce induction a.
of the sample gas. Refer to section 6.1 of this manual for setting of induction flow. When