39 of 46
Jun 2001
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Programmed Temperature Vaporization Inlet (PTV) 240
Leak testing
Leak testing
Preparation
1. Cool the column to ambient, and cool inlets to below 75°C to avoid
damage to deactivated glass liners.
2. Remove the column from the inlet fitting on the inside of the oven.
3. 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
now.
4. 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.
Note 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.
To Next Page
Loading...
Need help?
General
