Agilent Technologies 6850 Series II User Information page 128

Leak testing the split/splitless inlet
There are numerous places in the inlet that can leak. This procedure lets you
determine, in general, if there is an unacceptable leak in the inlet. If the inlet is
leaking, you should use an electronic leak detector to pinpoint the component
that is leaking.
If you have access to a Control Module, you can perform this test
automatically. See its documentation for details. The Control Module test
program will prompt you to complete the hardware tasks outlined below.
Tools
Septum nut wrench (part no. 19251–00100)
1/8-inch brass nut, 5180-4103
1/8-inch Vespel/graphite blank ferrule, 0100-1372
Column nut, 5181-8830
Vespel/graphite blank ferrule, 5020-8294
Procedure
Warning Be careful! The oven and/or inlet may be hot enough to cause burns.
This test requires either a Control Module or a ChemStation/Cerity Chemical to
edit setpoints.
1.
2.
3.
4.
Released: March 2004
Load the SERVICE method or reset the inlet and oven temperatures to
OFF. Let the heated zones cool to room temperature. Also, make sure that:
• If you have entered parameters that you do not want to lose, store
them as a method
• If the detector is on, turn it off
Turn the inlet pressure off at the source.
Remove the column, if installed, and plug the column fitting with the
column nut and a no-hole ferrule.
Replace the septum (see
(see "To install a liner and O-ring" on page
(see "Replacing the inlet base seal" on page
known.
6850 Series II GC User Information
"Changing septa" on page
120), and the inlet base seal
126) if their quality is not
Routine Maintenance: Inlets
Maintaining a split/splitless inlet
121), the liner O-ring
page 128 of 256