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VERIFICATION AND CALIBRATION
Figure 35 Confirmation dialog to reset defaults
4. Select OK.
Select CANCEL to return to the Calibration menu.
The instrument will confirm the factory calibration has been restored (Figure 36).
Figure 36 Confirmation that factory calibration was reset
5. Select OK.
6.5 ISOTHERM STANDARD COMPARISON
If concerns arise about the accuracy of the moisture sorption curve the VSA produces, it
is possible to perform a moisture sorption standard comparison. This can only be done
using the Moisture Analysis Toolkit software and must be performed on Microcrystalline
Cellulose (MCC). METER included a sample of MCC with the instrument or you can use your
own lab grade MCC. Contact Customer Support if you need additional MCC samples. To run
an isotherm standard test, go to actions and select Run Standard Test in the software. This
initiates a Test Wizard to walk you through the steps to initiate a test. The settings of this
test are preset and the test takes four to five days to complete.
If the Moisture Analysis Toolkit software remains connected to the instrument throughout
the duration of the standard test, the software prompts the user to save a .pdf report of
the test, after which, it graphs the newly created isotherm for MCC along with a preloaded
standard MCC curve to allow comparisons. To create a permanent copy of the newly created
MCC curve, manually save it in the File Menu. This .pdf report contains a comparison of
kinetic and moisture sorption isotherm curves, as well as an error value for the comparison
of the newly created curve and the preloaded standard MCC curve. METER recommends a
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