TA Instruments TMA 2940, Operator'S Manual

Page: 13 / 176

TA I
NSTRUMENTS
TMA 2940
XIII
Electrical Safety
Voltages exceeding 110 Vac are present in this
system. Always unplug the instrument before
performing any maintenance.
Because of the high voltages in this instru-
ment, untrained personnel must not remove
the cabinet cover unless specifically directed
to do so in the manual. Maintenance and
repair of internal parts must be performed by
TA Instruments, Inc. or other qualified service
personnel only.
After transport or storage in humid condi-
tions, this equipment could fail to meet all the
safety requirements of the safety standards
indicated. Refer to the NOTE on page 2-11 for
the method of drying out the equipment before
use.
Handling Liquid Nitrogen
The TMA 2940 can use the cryogenic (low-
temperature) agent, liquid nitrogen, for cooling
in subambient experiments. Because of its low
temperature (-195°C), liquid nitrogen will burn
the skin. Use extreme caution when working
with liquid nitrogen and other cryogenic materi-
als to ensure that you do not burn yourself.
Personnel working with liquid nitrogen should
take the following precautions.
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.
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