Micromeritics TriStar II 3020 - Fill and Install the Dewar

1. Fill the dewar with the analysis bath liquid (such as liquid nitrogen) to no higher than 21/4in.
(5.7cm) from the top. Filling the dewar higher than this will cause an error in the free space
measurement.
Incorrect fluid levels can lead to measurement errors. Check the level of the bath liquid
before each analysis.
2. Insert the dipstick and check the level of the analysis bath liquid. Condensation should not
exceed the level indicator mark.
3. For best results, if the dewar has not been used for a while, allow approximately 30 minutes
for the temperature of the dewar to stabilize with the bath liquid, then recheck the level of the
bath liquid. Add additional liquid if necessary.
4. If using isothermal jackets, slide the jackets down the sample tube until the jackets touch the
sample tube bulbs.
5. Slide the dewar lid to ensure a proper seal on the top of the dewar.
Fill and Install the Dewar
TriStar II 3020 Confirm Installation Instructions and Checklist
302-42870-04 (Rev A) — Sep 2017
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