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RUNNING A TEST
7. RUNNING A TEST
7.1 BECOMING FAMILIAR WITH STAGES
The AQUALAB VSA uses test stages to maximize the utility of running an isotherm test. In the
vocabulary of setting up and running moisture sorption isotherms with the VSA, an isotherm
test is considered a collection of stages all performed on one sample. Consider each stage
as a unique portion of a test with its own settings while conducting all stages on one sample
and combining the results into one data set at the end of the isotherm test.
Because each stage is unique, an isotherm test could consist of one stage or up to twenty
stages. An example of an isotherm test with multiple stages might be running a sample
through full adsorption and desorption using the static DVS method for Stage One, then
setting up Stage Two to run the same test, but using the DDI method on the same sample.
Another example would be to run a sample through full adsorption and desorption at 15 °C
for Stage One, then, in Stage Two, switch the temperature to 25 °C and run the same test
on the same sample. This stage interface makes it easy to compare dynamic and static
isotherms and utilize the advantages offered by both methods all on a single sample. It also
makes it easy to edit currently running tests.
7.2 MOISTURE ANALYSIS TOOLKIT SOFTWARE
The Moisture Analysis Toolkit software is a powerful tool for interfacing with the AQUALAB
VSA. The software makes it easy to download moisture sorption isotherm measurements
from the VSA, view the data in table or chart form, export for use in other programs, and
easily setup a new test with multiple stages.
The Moisture Analysis Toolkit software comes with the AQUALAB VSA and instructions for
how to install and connect to the software are in Section4.
Extensive help files explain the various features and processes of the Moisture Analysis
Toolkit. Click on the Help menu item and select the Moisture Analysis Toolkit Help submenu
item to display the help files.
Contact Customer Support with any questions on how to get started with the software.
7.3 RUNNING A MOISTURE SORPTION ISOTHERM TEST
Before starting a test it is important to verify that the VSA is performing correctly using
METER’s Verification Standards. Please refer to Section6 for instructions on how to verify
the VSA and adjust the calibrations if necessary. Tests can also be setup using a Wizard
interface in the Moisture Analysis Toolkit software (Section7.2).
NOTE: Before starting a test, refer to Appendix B to verify you are running under noncondensing conditions, as this
could void your warranty.
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