Remove Moisture from the Analyzer
A difficult-to-detect vacuum problem arises if moisture is allowed to collect in the system. A probable accumulation point is the restricting frits that control flow rates. The best way to remove moisture is to evacuate the analyzer at full rate for several days. If the indicated vacuum continues to decrease slowly over this period, accumulated moisture is the probable cause of the vacuum difficulty.
To prevent the accumulation of moisture in the future, do not evacuate samples which hold excessive water vapor. This is best done by precleaning samples in a drying oven.
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