Troubleshooting
6850
6850
Released: April 2004 6850 Series Gas Chromatograph Service Procedures 270
The Agilent pressure/flow calculator is depicted
below to demonstrate how the GC EPC system
would setup flows and pressures for the method:
The problem will be exaggerated because of the
low inlet pressure required for the method. Refer
to the pneumatic diagram below for illustration
of the flow and pressure characteristics of the
system.
Split ratio of 135:1 results in a split vent flow of 396 mL/min
and a total inlet flow of about 400 mL/min (column + septum
purge + split vent flows)
Inlet pressure required for
optimum liner velocity
Optimum linear
velocity
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