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Connect the cryogenic coolant supply
WARNING
Pressurized liquid CO
rial. Take precautions to protect personnel
from high pressures and low temperatures.
CO
in high concentrations is toxic to
2
humans; take precautions to prevent hazard-
ous concentrations. Consult your local
supplier for recommended safety precautions
and delivery system design.
WARNING
Do not use copper tubing or thin-wall stain-
less steel tubing with liquid CO
harden at stress points and may explode.
Released: April 2004
is a hazardous mate-
2
. Both
2
6850 Series Gas Chromatograph Service Procedures
Caution
Liquid CO
should not be used as a coolant
2
for temperatures below –40°C because the
expanding liquid may form solid CO
ice—in the GC oven. If dry ice builds up in the
oven, it can seriously damage the GC.
Caution
Do not install a pressure regulator on the
CO
tank, as vaporization and cooling would
2
occur in the regulator instead of the oven.
—dry
2
236
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