Micromeritics GEMINI VII KEYPAD Operator's Manual page 43

Dewar Precautions
Always handle glass Dewars with care. Any product incorporating a vacuum is a
potential safety hazard and should be treated with caution. If in doubt, contact your
safety officer.
Improper handling, disposing of, or transporting potentially hazardous materials can
cause serious bodily harm or damage the instrument. Always refer to the MSDS when
handling hazardous materials. Safe operation and handling of the instrument,
supplies, and accessories is the responsibility of the operator.
Do not pour liquid nitrogen directly into a sink. Doing so may cause drain pipes to
burst.
When handling Dewars containing liquefied gases or cryogenic liquids:
Wear protective equipment:
n
goggles or face shield
o
an insulated or rubber apron
o
insulated gloves
o
When pouring liquefied gases from one container to another:
n
cool the receiving container gradually to minimize thermal shock
o
pour the liquified gas slowly to prevent splashing
o
vent the receiving container to the atmosphere
o
For Glass Dewars
Use a plastic stirring rod when stirring substances in a Dewar containing liquefied gases (or
n
other materials of extremely low temperature). Do not use a glass or metal stirring rod unless it
has a protective coating.
Do not handle heavy objects above the Dewar. If unavoidable, place a protective cover over the
n
Dewar opening. If an object of sufficient weight is accidentally dropped into the Dewar, shat-
tering may occur.
If the Dewar has a protective mesh covering, do not remove it. This cover minimizes the risk of
n
flying particles should the Dewar be knocked over, dropped, or broken.
Gemini VII Keypad Operator Manual
239-42801-01 (Rev E) — July 2021
Fill and Install the Dewar
2 - 13