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1. INTRODUCTION
Thank you for choosing the AQUALAB Vapor Sorption Analyzer (VSA) from METER Group.
The VSA is an automatic isotherm generator from the world leaders in water activity
measurement. The VSA is the only automatic isotherm generator that can generate
isotherms using both the Dynamic Vapor Sorption (DVS) method, which generates
equilibrium isotherms, and the Dynamic Dew Point Isotherm (DDI) method, which generates
dynamic isotherms. By combining both methods in one instrument, the VSA makes it
possible to investigate both dynamic matrix changes due to water sorption and the kinetics
of those changes. This manual details VSA operation and provides information on the
capabilities of the VSA.
This manual includes instructions for setting up your VSA which includes setting up an
isotherm test, running a test, collecting data, and analyzing data. Please read the manual
before operating the VSA to ensure the instrument performs to its full potential.
METER provides this manual to aid the end user in understanding the basic concepts of
moisture sorption isotherms, enabling them to use our instruments with confidence. METER
has made every effort to ensure the content of this manual is correct and scientifically sound.
Verify all VSA components are included and appear in good condition:
• AQUALAB VSA Isotherm Generator main unit
• Calibration certificate
• Power cord
• USB cable
• 2 stainless steel sample cups
• 3 refillable desiccant tubes
• 2 bottles (1 for water; 1 for air)
• AQUALAB Cleaning Kit
• Three vials each of the following verification standards solutions:
0.920 a
w
2.33 mol/kg NaCl
0.760 a
w
6.00 mol/kg NaCl
0.500 a
w
8.57 mol/kg LiCl
0.250 a
w
13.41 mol/kg LiCl
• Moisture Analysis Toolkit Software Package with registration key
• 1 2-g NIST traceable weight
• Tweezers
NOTE: Please keep your original instrument shipping box. If the VSA needs to be returned to METER, it must be
shipped in the original packaging.
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