Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 117)

IM 11M13A01-02E 7-18
(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 are made to agree. 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-stabilization 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-stabilization time elapses. This output-stabilization
time is set to 10 minutes at the factory before shipment. If you press the [Enter] or
[Return] key within the output-stabilization time, manual calibration is then com-
pleted.