Piping For The Reference Gas; Piping For System 3 - YOKOGAWA ZR402G User Manual

Piping for the reference gas

6mm (O.D.) by 4mm (I.D.)
stainless steel pipe
Piping for the calibration gas
6mm (O.D.) by 4mm (I.D.)
stainless steel pipe
Stop valve or check valve
Figure 4.4
4.2.3 Piping for the Reference Gas
Reference gas piping is required between the air source (instrument air) and the flow setting unit,
and between the flow setting unit and the analyzer.
Insert the air set next to the flow setting unit in the piping between the air source and the flow
setting unit.
Use a 6mm (O.D.) x 4mm (I.D.) (or nominal size 1/4 inches) stainless steel pipe between the flow
setting unit and the analyzer.
4.3

Piping for System 3

Piping in System 3 is illustrated in Figure 4.5. In System 3, calibration is automated; however, the
piping is basically the same as that of System 2. Refer to Section 4.2.
Adjust secondary pressure of both the air set and the zero gas regulator so that these two
pressures are approximately the same. The flow rate of zero and span gases (normally
instrument air) are set by a individual needle valve. After installation and wiring, check zero gas
calibration contact output (see Sec. 7.10.2), and adjust zero gas regulator and calibration gas
needle valve so that zero gas flow is within the permitted range. Next check span gas calibration
contact output and adjust air set so that span gas flow is within the permitted range.
Automatic Calibration Unit
ZR20H
Note:
The installation temperature limits range for integrated type analyzer is -20 to 55°C.
Figure 4.5
Piping for the Calibration Gas Inlet
ZR202G Integrated type
Zirconia Oxygen/Humidity Analyzer
with automatic calibration
~
Reference gas
Span gas
Calibration gas (Zero)
Piping for System 3
F4.8E.ai
100 to 240 V AC
Contact input
Analog output, contact output
Digital output (HART)
Air Set
Instrument air
Pressure
regulator
Zero gas cylinder
Calibration gas unit case
<4. Piping>
F1.3E.ai
IM 11M12A01-04E 11th Edition : Jul. 19, 2017-00
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