Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 52)

<3. Installation>
3-6
IM 11M12A01-02E 8th Edition : Jan.13,2012-00
sample gas>
(1) When the furnace pressure is negative, raise the pressure setting to increase induction flow
of the sample gas.
Refer to Section 2.7.3, Ejector Assembly for High Temperature, for the setting of induction
flow.
If there is much dust in the gas, the ejector may become clogged as induction flow increases.
(2) When the furnace pressure is positive, open the needle valve of the sample gas outlet to
increase the gas flow.
Refer to Section 4.1.4, Piping to the High Temperature Probe Adapter.
(3) Warm the probe adapter. Refer to Section 4.2.4, Piping to the High Temperature Probe
Adapter.
(4) When the surface temperature is still less than 200 °C or below the dew point of the sample
gas, even if the above measures have been taken, warm the probe adapter using a heat
source such as steam.
3.2.3 Probe Insertion Hole
A high temperature detector consists of a ZR22G-015 Detector and ZO21P High Temperature
Probe Adapter. When forming the probe insertion hole, the following should be taken into
consideration:
(1) If the probe is made of silicon carbide (SiC), the probe hole should be formed so that the
probe is mounted vertically (within ± 5° tilt).
(2) In the case where the probe is made of stainless steel and the probe adapter (ZO21P-H-B) is
to be mounted horizontally, the probe hole should be formed so that the probe tip is not higher
than the probe base.
Figure 3.5 illustrates examples of the probe insertion hole.
100mm
JIS 5K 50 FF (equivalent)
or ANSI Class 150 4 RF
(equivalent) flange
100mm
A space of 52 mm or more
in diameter, and long enough
for the length of the probe
The allowable margin for probe
tilt is within ± 5°.
An SiC probe shall be mounted vertically.
A space of 52 mm or
more in diameter, and
long enough for the length
of the probe
Never mount the probe
with its tip higher than
the base
Horizontal mounting is used with a SUS probe.
JIS 5K 50 FF (equivalent) or
ANSI Class 150 4 RF
(equivalent) flange
F3-5E.ai
Figure 3.5 Examples of the probe insertion hole
3.2.4 Mounting of the High Temperature Detector
CAUTION
• Ceramic (zirconia) is used in the sensor (cell) portion on the detector probe tip. Care should
be taken not to drop the detector during installation.
• The same applies to a probe made of silicon carbide (SiC).
• A gasket should be used on the flange surface to prevent gas leakage. The gasket material
should be selected depending on the characteristics of the sample gas. It should be heatproof
and corrosion-proof. The parts, which should be supplied by the user, are listed in Table 3.2.