40 Agilent 7890B Installation
1 Installing the GC
Connecting liquid nitrogen
Materials needed:
• 1/4-inch insulated copper tubing
1 Position the nitrogen tank as close to the GC as possible to
insure that liquid and not gas is delivered to the inlet.
2 Locate the inlet for coolant on the left-hand side of the GC.
Prepare enough tubing to reach from the supply tank to this
outlet. See Figure 14.
Figure 14 N
2
cryogenic cooling valve connections
3 Connect the supply tubing to the liquid N
2
tank outlet with
the fitting recommended by the supplier.
4 Use a Swagelok fitting to connect the supply tubing to the
cryogenic valve inlet.
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