Installation
Safely route vent tubing
Released: March 2004 6850 Series II GC User Information page 247 of 256
Safely route vent tubing
The FPD provides a plastic vent tube that exits the back of the detector cover.
During normal operation, this detector produces water vapor. Vent the tubing
appropriately.
The µECD provides a vent tube that exits the back of the lid. Connect this tube
to a fume hood or other location as directed by your radiation safety officer or
environmental health and safety organization. See “µECD warnings” on page 7
for more information.
Prepare the cryogenic oven cooling system
Warning Pressurized liquid CO
2
is a hazardous material. Take precautions to protect
personnel from high pressures and low temperatures. CO
2
in high
concentrations is toxic to humans; take precautions to prevent hazardous
concentrations. Consult your local supplier for recommended safety
precautions and delivery system design.
Warning Do not use copper tubing or thin-wall stainless steel tubing with liquid CO
2
.
Both harden at stress points and may explode.
Caution Liquid CO
2
should not be used as a coolant for temperatures below –40°C
because the expanding liquid may form solid CO
2
—dry ice—in the GC oven. If
dry ice builds up in the oven, it can seriously damage the GC.
If you ordered CO
2
cryogenic oven cooling with the GC, the cooling coil for the
oven and the filter on the cryogenic chassis are shipped uninstalled because of
the possibility of damage if shipped installed.
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