Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 178)

IM 11M12D01-01E 10-16
F10.16E.EPS
Enter
21.00%
Ch2
1min./div.
0.98%
20.9 %O2 CHK. TIME
Manual ind. check
Channel No.
under calibration
Setting value of
span gas concentration
Setting value of
zero gas concentration
Actual measurement value
Fig. 10.16 Span Indication Check
9) If you touch the Enter key then span gas check ends and you are returned to the
Check gas selection display. Close the span gas flow control valve and tighten the
lock nut used to prevent it from loosening during measurement.
10) Select [Zero gas ind. check] and touch the Enter key.
11) Open the zero gas flow control valve, and adjust flow rate to 600
Ϯ60 ml/min.
12) Select [Start ind. check] and touch the Enter key. An oxygen concentration graph
like Figure 10.17 is displayed, and [CHK.TIME] status mark flashes. Wait for the
graph measured value trace to stabilize. Compare the measured zero gas concentra-
tion displayed at the bottom of the display against the certified concentration of zero
gas to check for any discrepancy or error.
F10.17E.EPS
Enter
21.00%
Ch2
1min./div.
0.98%
0.98 %O2 CHK. TIME
Manual ind. check
Fig. 10.17 Zero Indication Check
13) If you touch the Enter key then zero gas check ends and you are returned to the
Check gas selection display. Close the zero gas flow control valve and tighten the
lock nut used to prevent it from loosening during measurement.
14) Select [Third gas ind. check] and touch the Enter key.
15) Open the third gas flow control valve, and adjust flow rate to 600
Ϯ60 ml/min.
16) Select [Start ind. check] and touch the Enter key. An oxygen concentration graph
like Figure 10.18 is displayed, and [CHK.TIME] status mark flashes. Wait for the
graph measured value trace to stabilize. Compare the measured third gas concentra-
tion displayed at the lower left of the display against the certified concentration of
third gas to check for any discrepancy or error.
17) If you touch the Enter key then third gas check ends and you are returned to the
Check gas selection display. Close the third gas flow control valve and tighten the
lock nut used to prevent it from loosening during measurement.
18) Select [End]. An oxygen concentration graph (Figure 10.19) is displayed and hold
time begins. After the preset time has elapsed then the display reverts to channel
select. If you touch the Enter key during hold time then hold time is skipped.