5 DEGASSING
Most solid materials absorb moisture and other contaminants when exposed to the atmosphere.
The sample must be clean when an analysis is performed. The degas process heats the sample
to remove the moisture and contaminants.
The Smart VacPrep Operator Manual can be found on the Micromeritics web page
(www.micromeritics.com).
DEGAS ON THE SMART VACPREP
Equipment Options and Upgrades on page1 - 4
The Smart VacPrep Operator Manual can be found on the Micromeritics web page
(www.micromeritics.com).
TRANSFER A DEGASSED SAMPLE TO AN ANALYSIS PORT
Sample Data Worksheet for Gas Adsorption on pageE - 1
When degassing on a separate degasser such as a Smart VacPrep, the sample tube must be
removed from the degas port, weighed, and then installed onto the analysis port for analysis.
If the sample tube is not mounted on the analysis port immediately, leave it on the
degas port. If it is necessary to remove the sample tube and a Check Seal or TranSeal
was not used, insert a rubber stopper into the sample tube.
1. Allow the sample tube to cool to room temperature (approximately 15 minutes).
Do not touch the sample tube or the heating mantle until they have reached room
temperature. Touching the sample tube, heating mantle, or heating mantle clip before
they have cooled could result in burns.
2. Carefully remove the heating mantle clip and the heating mantle from the sample tube.
3. While holding the sample tube, loosen the port connector nut and remove the sample tube
from the degas port. If a Check Seal or TranSeal was not inserted prior to degassing, imme-
diately insert a rubber stopper into the sample tube.
4. Complete the Sample Data Worksheet.
5. If using a Check Seal, ensure that the Check Seal opener is installed in the analyzer sample
port. If a rubber stopper was used, remove the stopper from the sample tube.
6. bulb
7. Place the connector nut, ferrule, and O-ring onto the sample tube stem.
8. On the analyzer, loosen the connector nut on the Psat tube and rotate it out of the way.
9. Position the Dewar cover so that the slot for the Psat tube is on the left.
5 Degassing
TriStar II Plus Operator Manual
303-42800-01 (Rev M ) — Sep 2023
5 - 1
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