Agilent Technologies 6890 Series Service Manual page 6

Contents
Leak testing-EPC and manual inlets .................................................... 10
Preparation ........................................................................................ 10
Performing the leak test-EPC inlets............................................. 12
Performing the leak test-manual inlets........................................ 14
Leak testing the EPC module only ..................................................15
Forward pressure valve leaks.......................................................... 16
Locating leaks on the flow manifold............................................... 16
Correcting leaks ................................................................................ 18
Potential leak points ......................................................................... 19
230 Cool On-Column Inlet
Theory of operation .................................................................................... 1
EPC inlet...............................................................................................2
Manually controlled inlet ................................................................... 3
Replacement procedures ........................................................................... 4
Replacing the inlet .............................................................................. 4
Replacing the heater/sensor assembly ............................................. 7
Replacing the inlet EPC flow manifold ............................................ 8
Replacing the supply fitting on a Type 1 EPC flow manifold ........ 9
Leak testing EPC and manual inlets ....................................................... 10
Preparation ........................................................................................ 10
Performing the leak test-EPC inlets............................................. 12
Performing the leak test-manual inlets........................................ 14
Leak testing the EPC module only ..................................................15
Forward pressure valve leaks.......................................................... 15
Locating leaks ....................................................................................16
Correcting leaks ................................................................................ 18
Potential leak points ......................................................................... 19
240 Programmed Temperature Vaporization Inlet (PTV)
Theory of operation .................................................................................... 1
Operating modes ................................................................................. 1
Sampling heads.................................................................................... 2
Jun 2001
Contents
Agilent 6890 Gas Chromatograph Service Manual
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