TA Instruments TMA 2940 CE, Operator'S Manual, Page: 16 / 178

TA I
NSTRUMENTS
TMA 2940 CE
XVI
Safety
(continued)
WARNING: Liquid nitrogen evaporates
rapidly at room temperature. Be certain
that areas where liquid nitrogen is used are
well ventilated to prevent depletion of
oxygen in the air.
1. Wear goggles or a face shield, gloves that
are large enough to be removed easily, and a
rubber apron. For extra protection, wear
high-topped, sturdy shoes, and leave your
pant legs outside the shoe tops.
2. Transfer the liquid slowly to prevent thermal
shock.
3. Use containers that have adequate low-
temperature properties. Ensure that closed
containers have vents to relieve pressure;
liquid nitrogen evaporates rapidly at room
temperature.
4. The purity of liquid nitrogen alters as it
evaporates. If much of the liquid in the
container has evaporated, check the remain-
ing liquid before using it for any purpose in
which high oxygen content is dangerous.
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W ARNING