Perform an Empty Tube Analysis for Diagnostic Purposes
An empty tube analysis is a means of pinpointing operational problems in the analyzer. Leaks, as well as electronic problems, will result in an unsatisfactory blank analysis. This test should be performed prior to detailed troubleshooting. The data produced during the blank analysis can be helpful in identifying the cause of a problem and should be performed before contacting a Micromeritics Service Representative.
Helium is required for performing an empty tube analysis since a measured free space is required. If helium is unavailable, contact a Micromeritics Service Representative for an alternative method of performing this procedure.
- Install empty, straight-wall sample tubes (free of cracks or chips) of the same size in the sample and balance ports. Ensure the O-rings are in good condition.
- Place the Dewar support on the elevator, then place a Dewar of water at ambient temperature on the Dewar support. (A Dewar support is not necessary for the larger Dewar used with the Gemini VII 2390t. Place the Dewar directly on the elevator.)
- Go to Unit [n] > Empty Tube Analysis.
- Click Browse and select a file or to create a new one. Click Open.
- Click Edit to make modifications or replace all parameters in the open file using the Replace All button. Click Save, then click Close.
- Click Report after analysis to generate reports to specify the report destination when the analysis is complete. Click OK.
- Click Start to begin the analysis. A window displays data as they are collected. A short delay is encountered before the port status changes from the Idle state at the bottom of the screen. Review the analysis results to see if they are within the tolerances shown in the following table. If these results are not achieved, call a Micromeritics Service Representative.
P/P0 | Tolerance in cm3 STP |
---|---|
0.1 | ±0.008 |
0.2 | ±0.010 |
0.3 | ±0.012 |
0.4 | ±0.014 |
0.5 | ±0.016 |
0.6 | ±0.018 |
0.7 | ±0.020 |
0.8 | ±0.022 |
0.9 | ±0.024 |
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