Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 53)

<4. Piping>
4-4
IM 11M12A01-04E
F4.8E.ai
Stop valve or check valve
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
Figure 4.8 Piping for the Calibration Gas Inlet
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 4.9. 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. 7.9.2), 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.
~
100 to 240 V AC Automatic Calibration Unit
Reference gas
Calibration gas (Zero)
Contact input
Analog output, contact output
Digital output (HART)
Air Set
Instrument air
Calibration gas unit case
Pressure
regulator
Zero gas cylinder
ZR202G Integrated type Zirconia Oxygen Analyzer
with automatic calibration
F1.3E.ai
Span gas
ZR20H
Note:
The installation temperature limits range for integrated type analyzer is -20 to 55°C.
Figure 4.9 Piping for System 3