Leak Testing; Preparation - Agilent Technologies 6890 Series Service Manual

Gas chromatograph

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Leak testing

Cool the column to ambient, and cool inlets to below 75°C to avoid

damage to deactivated glass liners.

Remove the column from the inlet fitting on the inside of the oven.

If a septum head is installed, and the quality of the septum (or microseal)

and Graphpack-3D ferrule on the glass liner are unknown, replace them

Cap the inlet's column fitting and the septum purge vent (septum head

only). Use solid (no hole) Vespel type ferrules 1/8-inch (part no. 0100-

1372) and 1⁄ 16-inch (part no. 5181-7458) with a 1/8-inch Swagelok nut

(part no. 5180-4103) and a capillary column nut.

As alternate capping devices, a 1/8-inch Swagelok cap can be used for the

septum purge vent. A capillary column nut with a solid piece of wire the size

of a paper clip and a 0.5 mm ID graphite ferrule may be used for the inlet

column fitting.

Programmed Temperature Vaporization Inlet (PTV)

Agilent 6890 Gas Chromatograph Service Manual

Leak testing

6890a 6890 plus