7 VERIFICATION AND CALIBRATION AquaLab
13. To save the new calibration changes, select the Save icon and
the Calibration screen to verify that the AquaLab saved your
new multi-point calibration.
14. To discard the calibration changes and exit without saving,
press the Cancel button and the system returns a calibration
canceled message.
15. Let the chamber air out for at least an hour, then re-measure
a 0.76 a
w
verification standard again in normal sampling mode
(with sensor type still capacitance). It should read the proper
value (within ±0.015 a
w
) at a given temperature of a second
verification standard (0.25 or 0.50 a
w
) according to the verifi-
cation procedure described above. (Appendix B) If both veri-
fication readings are within ±0.015 a
w
then the instrument is
ready to begin testing.
16. Chose a second verification standard and run a test. If you
still have incorrect verification standard readings for the capac-
itance sensor after cleaning the chamber, adjusting for linear
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