Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 60)

IM 11M13A01-02E 3-9
3. Installation
(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.
CAUTION
When a heater is used in hazardous area, then be sure to use appropriate
explosionproof heater and wiring conduit.
<When the surface temperature is less than 200
ЊC or the dew point of the measure-
ment gas>
(1) When the furnace pressure is negative, raise the analyzer pressure to increase
induction flow of the measurement gas.
Refer to Section 2.7.1, Auxiliary Ejector for High-temperature Use, for the setting of
induction flow.
When there is much dust in the gas, the ejector may become clogg if you increase
induction flow.
(2) When the furnace pressure is positive, open the needle valve for the sample gas
outlet to increase the gas flow.
Refer to Section 4.1.5, Piping to the High-temperature Probe Adapter.
(3) Warm the probe adapter. Refer to Section 4.1.5, Piping to the High-temperature
Probe Adapter. Ensure that its temperature does not drop below freezing point in
winter.
(4) When the surface temperature is still less than 200
Њ C or the dew point of the mea-
surement 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 ZR22S-
ᮀ -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 (no more than a 5
Њ tilt).
(2) In the case where the probe is made of stainless steel and the probe adapter is to be
mounted horizontally, the probe hole should be formed so that the probe tip is not
higher than the probe base.
Figure 3.6 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 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
F3.06E.EPS
Figure 3.6 Examples of the probe insertion hole