Weight Is Decreasing During Adsorption; Weight Is Increasing During Desorption; Isotherm Test Has Stopped Prematurely - Decagon AquaLab User Manual

21. PROBLEM:
Weight is decreasing during absorption.
SOLUTIONS:
1) Water tank has run dry.
2) Plug on fill tank is loose.
3) Pump is not working.
4) Material is undergoing a phase change.
5) Scale needs to be checked for calibration.
22. PROBLEM:

Weight is increasing during desorption.

SOLUTIONS:
1) Desiccant cartridge has been used up.
2) Pump is not working.
3) Desiccant tube/tubes leaking.
4) Scale needs to be checked for calibration.
23. PROBLEM:

Isotherm test has stopped prematurely.

SOLUTIONS:
1) Download the test with the VSA downloader.
2) Navigate to the Table view.
3) Scroll down to the last data record in the list.
4) Look in the special condition column to see what
caused the test to stop prematurely.
5) Refer to the troubleshooting section that references the
special condition indicated.
AquaLab Vapor Sorption Analyzer
95
10. Troubleshooting