Selections Description
2. Analysis bath temperature (not used for krypton analyses).
Measures the p
0
on a continuous basis and over the sample,
then adjusts the measured p
0
in the sample tube to agree with
the p
0
over the sample.
3. The p
0
and analysis bath temperatures or an analysis bath
temperature only (when Absolute pressure dosing is selected
on the Analysis Conditions window). This method uses the
entered values.
4. Psat gas. If this is a krypton analysis, select the Nitrogen @
77.35K option from the Adsorptive drop-down box. Click Psat
vs T to edit the values of the Psat vs T table. Editing the values
in the current table does not affect the original table.
5. Analysis bath temperature. Analysis bath temperature and
an estimate for the initial p
0
(not used for krypton analyses).
Measures the p
0
over the sample. After the p
0
is measured,
the value is reapplied to all data points.
6. Analysis bath temperature. This method calculates the p
0
at
the time of analysis using the entered temperature.
Preparation [button]
Use to enter analysis preparation details.
Evacuation rate. The rate for restricted evacuation.
Evacuation time. The length of time for preliminary evacuation.
Fast Evacuation. Select for samples (such as pellets) that do not
fluidize or shed particles during evacuation.
Leak Test. Enables the system to check for leaks or sample
outgassing before the analysis. The leak test allows sample pressure
to rise during the test. If the pressure rises more than 0.15 mmHg,
the analysis does not proceed and the operator is notified. While leak
testing slightly increases analysis time, it prevents the continuation of
analysis and collection of erroneous data if a leak exists.
Analysis Conditions (continued)
Analysis Conditions
TriStar II Plus Operator Manual
303-42800-01 (Rev M ) — Sep 2023
4 - 11
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