Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 121)

IM 11M12D01-01E 7-11
7. Startup
8) Open the span gas flow setting valve, and adjust flow to 600
Ϯ60 ml/min.
9) Select [Valve opened (Start Calibration)] and touch the [Enter] key. An oxygen
concentration graph like Fig. 7.13 is displayed, and [CAL.TIME] status mark flashes.
Wait for the graph measured value trace to stabilize. Calibration has not yet been
performed, so it is not a problem if the displayed value is different from the correct
value of span gas concentration.
F7.13E.EPS
Enter
21.00%
Ch1
1min./div.
0.98%
21.0 %O2 CAL. TIME
Manual cal. Channel No.
under calibration
Setting value of
span gas concentration
Setting value of
zero gas concentration
Actual measurement value
Fig 7.13 Display during calibration
10) When the graph trace stabilizes, touch the [Enter] key. The display changes to like
Fig. 7.14. The measured value is adjusted to read the same as the span gas concentra-
tion set value, and a check mark appears in the check box beside Span calibration.
Close the span gas flow setting valve and tighten the lock nut used to prevent it from
loosening during measurement.
11) Next perform zero calibration. Select [Zero calibration] and touch the [Enter] key.
12) Select [Next] and touch the [Enter] key.
Enter
F7.14E.EPS
Ch1 Manual cal.
Span calibration
Zero calibration
Zero calibration
᭜
End
Close the span gas valve.
Fig. 7.14 Zero calibration start display
13) Open the zero gas flow setting valve, and adjust flow to 600
Ϯ60 ml/min.