YOKOGAWA ZR22S, Руководство пользователя

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<3. Installation>
3-9
IM 11M13A01-02E
3.2.2 Usage of High Temperature Probe Adapter
(Model ZO21P)
During analysis, the surface temperature of the probe adapter should be within the range from
more than the dew point of the sample gas and 300°C or less to prevent ejector clogging, gasket
deterioration or bolt scoring.
Where the dew point of the sample gas is not known, keep within the range of more than 200°C
to less than 300°C.
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 range, the following measures can be
taken to change the temperature.
CAUTION
When the surface temperature of ZR22S or ZO21P exceeds temperature class T2(300°C), this
system shall not satisfy explosion-proof requirement for outside of the furnace.
<When the surface temperature exceeds 300°C>
(1) When the furnace pressure is negative, lower the pressure setting to reduce induction flow
of the sample gas.
Refer to Subsection 2.7.1, Ejector Assembly for High Temperature, for the setting of
induction flow. When you reduce induction flow, ensure that the ejector inducts air when the
furnace pressure fluctuates.
(2) When the furnace pressure is positive, close the needle valve for the sample gas outlet to
reduce the exhaust gas flow. Refer to Subsection 4.1.5, Piping to the High Temperature
Probe Adapter.
(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.
CAUTION
When a heater is used in hazardous area, then be sure to use appropriate explosion-proof heater
and wiring conduit.