42
VERIFICATION AND CALIBRATION
10. Select OK to begin testing.
NOTE: To interrupt the offset procedure, return the lever to the OPEN position or select CANCEL to return to the
previous screen.
After the AQUALAB VSA has finished measuring the verification standard, it displays a
Change the offset screen (Figure 32).
Figure 32 Change the offset screen
11. Use UP and DOWN to adjust the water activity reading to its proper value for the
particular verification standard.
12. Select SAVE to store this new value.
To cancel and return to the main menu, select CANCEL to make no changes.
13. Restart the verification procedure in Section6.1. If the instrument reads within
±0.005 a
w
with both standards, then the instrument is ready to begin testing.
If incorrect verification standard readings persist after cleaning the chamber and
adjusting for linear offset, contact Customer Support for further instructions.
6.3 ADJUSTING FOR WEIGHT MEASUREMENT OFFSET
1. To adjust the balance, toggle to the Configuration tab by pressing the Menu icon.
Calibration is the first option highlighted.
Figure 33 Calibration options
2. To adjust the balance, highlight weight, press the Enter button and the Calibration:
Weight screen appears.
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