Micromeritics GEMINI VII Operator's Manual page 89

12. Click Browse. Locate and select the sample file created previously for this analysis. Click
Open.
a. Click Report After
b. Select Report after analysis and Preview as the destination. Click OK.
13. Click Start.
14. Compare the BET Surface Area in the report with the BET Surface Area on the reference
material bottle.
If results are within tolerance, the analyzer is operating properly.
n
If results are not within tolerance, refer to the following table for possible causes and
n
actions. After performing the action, perform the reference material analysis again.
Cause
The sample was not degassed properly.
The gas lines are not clean.
The measured free space is too high.
This indicates the helium may not be
pure enough.
Gemini VII Operator Manual
239-42828-01 (Rev H ) — May 2021
Analysis.
Perform a Reference Material Analysis
Action
Degas the sample again.
Clean and verify the gas lines.
Helium must be 99.995% pure.
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