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<3. PIPING>
3-4
IM 11M03A02-00E
3.2
Piping for System 2
Piping in System 2 is illustrated in Figure 3.3.
~
Model ZA8F flow setting unit
EXA ZR402G
ZO21DW Zirconia Oxygen
Analyzer, Detector
Model ZR402G Converter
Reference
gas
Calibration gas
Needle
valve
flowmeter
Instrument air
Air Set
Calibration gas pressure regulator
Zero gas cylinder
Calibration gas
unit case
F3.3E.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 3.3
Piping for System 2
System 2 illustrated in Figure 3.3 requires piping as follows :
• Mount the check valve or stop valve through a nipple to the reference gas inlet of the
detector.
CAUTION
The stop valve should be connected directly to the detector. If any piping is present between the
detector and the stop valve, condensed water may be produced in the pipe, which may cause
damage to the sensor by rapid cooling when the calibration gas is introduced.
•
Supply air pressure (flow) may vary depending on the furnace pressure. It is recommended
to use a flow gauge and an air set that is suitable for the furnace pressure.
CAUTION
When using the ZA8F Flow Setting Unit and ZR40H Automatic Calibration Unit, please note that
the supplying airflow (pressure) will vary depending on the furnace pressure.
3.2.1
Piping Parts for System 2
Check that the parts listed in Table 3.2 are ready.
Содержание ZO21DW
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