Micromeritics GEMINI VII, Operator'S Manual

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P
ERFORM
R
EFERENCE
M
ATERIAL
A
NALYSIS
Perform a Reference Material Analysis on page 5 - 16
P
ERFORM AN
E
MPTY
T
UBE
A
NALYSIS FOR
D
IAGNOSTIC
P
URPOSES
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.
1. 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.
2. Place the Dewar support on the elevator, then place a Dewar of water at ambient tem-
perature 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.)
3. Go to Unit [n] > Empty Tube Analysis .
4. Click Browse and select a file or to create a new one. Click Open .
5. Click Edit to make modifications or replace all parameters in the open file using the
Replace All button. Click Save , then click Close .
6. Click Report after analysis to generate reports to specify the report destination when the
analysis is complete. Click OK .
7. 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 fol-
lowing table. If these results are not achieved, call a Micromeritics Service Representative.
Perform Reference Material Analysis
Gemini VII Operator Manual
239-42828-01 (Rev H ) — May 2021
10 - 17