Troubleshooting
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)
- Parts and Accessories
- Smart VacPrep Operator Manual (PDF)
- Vacuum Pump Guide (PDF)
Most operational problems are caused by:
- Leaks (commonly found at the sample tube O-ring at the analysis port)
- Sample weighing errors
- Use of too much analysis bath fluid in the Dewar at the start of an analysis
- Entry of incorrect system volume for analysis
- Impure gas supply
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 is noisy.
Cause: |
The elevator screw may need greasing. |
Action: |
Contact your Micromeritics Service Representative. |
Sample is not within specifications.
Cause A: |
There may be a manifold leak. |
Action A: |
Run a manifold leak test. See Diagnostics. |
Cause B: |
Gas may be contaminated. |
Action B: |
- Perform a blank analysis. If results are good, perform a reference material analysis.
- Replace tank.
- Check for line leak, which could cause contamination.
- Flush the lines occasionally to help prevent contamination.
|
Cause C: |
Incorrect type of gas line. |
Action C: |
Ensure the gas line is all metal. It is best to use the one shipped with the analyzer. Do not use polymer gas lines or flexible gas lines that may be coated internally with a polymer. |
Vacuum pump is noisy.
Cause A: |
Sample tube connector is loose. |
Action A: |
Tighten fitting. Replace O-ring. |
Cause B: |
Sample tube O-ring is worn or cracked. |
Action B: |
Replace O-ring. See Sample Tube O-ring Replacement. |
Cause C: |
Sample tube is cracked. |
Action C: |
Replace with new sample tube. |
Cause D: |
No sample tube loaded on a selected port. |
Action D: |
Install plug or empty sample tube. |
Cause E: |
Gas inlet valve open while vacuum valve open. |
Action E: |
With manual control enabled, use the instrument schematic to close gas inlet valve. |