YOKOGAWA EXAxt ZR22G, User Manual, Page: 57 / 211

<3. Installation>
3-6
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
(3) When the probe adapter is surrounded by a heat insulator, remove the heat insulator.
Ensure that the temperature of the probe adapter does not fall below the dew point of the
gas in winter.
(4) To prevent temperature rises due to radiant heat, insert heat insulator between the wall of
the furnace and the probe adapter.
(5) To prevent temperature rises from thermal conduction, place the mounting flange as far
from the wall of the furnace as possible.
<When the surface temperature is less than 200°C or below the dew point of the 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 4.1.4, 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.
3.2.2 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 3.7 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 3.7 Examples of the probe insertion hole