Installing The Analysis Dewar - Micromeritics Gemini VII 2390a Operator's Manual

Preparing for Analysis
5. Place the Dewar cover under the sample and balance tubes and slide upward until it is three inches
from sample nuts.

Installing the Analysis Dewar

Prepare the analysis Dewar after installing the sample tube
Always handle glass Dewars with care. Any product incorporating a vacuum is a
potential safety hazard and should be treated with caution. Always observe the
precautions listed below.
When handling Dewars containing liquefied gases:
• Wear protection by using:
– goggles (or a face shield)
– an insulated or rubber apron
– insulated gloves
• When pouring liquefied gases from one container to another:
– cool the receiving container gradually to minimize thermal shock
– pour the liquefied gas slowly to prevent splashing
– vent the receiving container to the atmosphere
For glass Dewars:
• Use a plastic stirring rod when stirring substances in a Dewar containing liquefied gases (or other
materials of extremely low temperature). Do not use a glass or metal stirring rod unless it has a
protective coating.
• Do not remove the mesh covering from the Dewar flask. This covering helps to maintain a secure
grip on the Dewar.
3-22
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239-42828-01 - Dec 2012
Gemini VII