<4. Piping>
4-5
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
4.2 Piping for System 2
Piping in System 2 is illustrated in Figure 4.7.
~
ZA8F Flow Setting Unit
ZR22G Separate type
Zirconia Oxygen/Humidity Analyzer, Detector
ZR802G Converter
Reference
gas
Calibration
gas
Needle
valve
Flowmeter
Instrument air
Air Set
Pressure
reducing
valve
Zero gas cylinder
Calibration gas
unit case
F4-7E.ai
Stop valve
or Check valve
Span gas
(Same as Zero gas Calibration)
Signal
(6-core shield cable)
Contact input
Analog output, Contact input
Digital output (HART)
Heater (2-core)
100 to
240 V AC
Figure 4.7 Piping for System 2
• Connect a stop valve or check valve the nipple at the calibration gas inlet of the detector.
• It is recommended to use ZH21B dust protector to protect the probe output from dust
agitation (i.e., to prevent combustible materials from entering the probe cell) where humidity
measurements are made under dusty or combustible environment.
• If a high temperature detector is used and the sample gas pressure is negative, connect
an ejector assembly to the sample gas exhaust hole of the high temperature probe adapter
(see Section 4.1.4,
“Figure 4.3 Mounting the ejector assembly”).
• If a high temperature detector is used and the pressure of the sample gas is 0.49 kPa or
higher, it is recommended that a needle valve (throttle) be used in the sample gas exhaust
of the high temperature probe adapter (see Section 4.1.4,
“Figure 4.4 Mounting the
).
CAUTION
This is for lowering the sample gas temperature below 700°C. If the gas temperature is high and
700°C when reaching the detector.
On the other hand, if the sample gas temperature is lowered too much, condensation may be
produced in the high temperature probe adapter. During wintertime, it is recommended that the
high temperature probe adapter be protected with an insulating material to prevent condensation
(see Section 4.1.4,
“Figure 4.5 Preventing to condensation”).
For the usage of the high temperature probe adapter, refer to Section
“3.2.1 Usage of the
High Temperature Probe Adapter (ZO21P-H)”.
• If the dust sticking to the interior of the high temperature probe adapter is to be eliminated by
blow back while using the high temperature detector, the air feed for blow back should also
be taken into consideration.
To Next Page
Loading...
Need help?
General
