YOKOGAWA av550g, User Manual

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< 10. Other Functions >
10-16
IM 11M12D01-01E
9) If you touch the Enter key then span gas check ends and you are returned to the Ind. 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 ± 60 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 concentration displayed at the bottom of the
display against the certified concentration of zero gas to check for any discrepancy or error.
13) If you touch the Enter key then zero gas check ends and you are returned to the Ind. 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 ± 60 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 concentration 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 Ind. 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.
F10-17E.ai
Enter
21.00%
Ch2
1min./div.
0.98%
0.98 %O2 CHK. TIME
Manual ind. check
F10-18E.ai
Enter
21.00%
Ch2
1min./div.
0.98%
9.05 %O2 CHK. TIME
Manual ind. check
Figure 10.17 Zero Indication Check Figure 10.18 Third Gas Indication Check
F10-19E.ai
Enter
21.00%
Ch2
1min./div.
0.98%
20.4 %O2 HOLD TIME
Manual ind. check
Figure 10.19 Hold Time