Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 111)

IM 11M12A01-03E 7-19
7. Startup
(9) After the measured value has stabilized, press the [Enter] key to display the “zero-
calibration complete” display shown in Figure 7.26. At this point, the measured value
is corrected to equal the zero-gas concentration setting. Close the zero-gas flow
valve. The valve lock-nut should be tightened completely so that the zero gas does
not leak.
Enter
Zero calibration
Close the zero gas valve.
Span calibration
᭜
End
Manual calibration
F7.26E.EPS
Figure 7.26 Zero Calibration Complete Display
(10) Select “End” in the display as shown in Figure 7.26. An oxygen concentration trend
graph (with the oxygen concentration being measured) appears and “HOLD TIME”
then flashes. This time is referred to as the output-stabilize time. If the “HOLD
TIME” has been set with the output-hold setting, the analog output remains held
(refer to Section 8.2, “Output Hold Setting,” later in this manual). Manual calibration
is completed when the preset output-stabilize time elapses. This output-stabilized
time is set to 10 minutes at the factory before shipment. If you press the [Enter] or
[Return] key within the output-stabilize time, manual calibration is then completed.