Troubleshooting - Micromeritics GEMINI VII Operator's Manual

10 T
ROUBLESHOOTING
The analyzer has been designed to provide efficient and continuous service; however, certain
maintenance procedures should be followed to obtain the best results over the longest period of
time. When unexpected results occur, some common operational problems not indicated on the
window and their respective causes and solutions are provided.
The following can be found on the Micromeritics web page (www.Micromeritics.com).
Error Messages document (PDF)
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Parts and Accessories
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Smart VacPrep Operator Manual (PDF)
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Vacuum Pump Guide (PDF)
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Most operational problems are caused by:
Leaks (commonly found at the sample tube O-ring at the analysis port)
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Sample weighing errors
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Use of too much analysis bath fluid in the Dewar at the start of an analysis
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Entry of incorrect system volume for analysis
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Impure gas supply
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When unexpected analysis results occur, check the above first. Some common operational
problems not indicated on the window and their respective causes and solutions are provided
below:
Elevator cannot be raised or lowered.
Cause: Dewar elevator stuck.
Action: Check for possible obstruction to elevator movement.
Elevator is noisy.
Cause: The elevator screw may need greasing.
Action: Contact your Micromeritics Service Representative.
Expected results are not within range.
Cause A: Sample improperly degassed.
Action A: Verify that the degassing temperature and degas time were set properly.
Cause B: Gas cylinder(s) may be almost empty - causing gas impurity.
Gemini VII Operator Manual
239-42828-01 (Rev H ) — May 2021

10 Troubleshooting

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