Agilent Technologies 6890 Series - Page 5

2 of 24 Jun 2001
Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
Manually controlled inlet........................................................................... 5
Split mode ............................................................................................ 5
Splitless mode ..................................................................................... 6
Replacement procedures ........................................................................... 8
Removing the inlet .............................................................................. 8
Top insert assembly replacement.....................................................9
Heater/sensor assembly replacement ............................................ 11
Reinstalling the inlet......................................................................... 11
Replacing the split vent trap............................................................ 13
Replacing the split vent trap filter cartridge.................................. 15
Replacing the inlet EPC flow manifold .......................................... 17
Replacing the supply fitting on a Type 1 flow manifold............... 18
Leak testing—EPC and manual inlets.................................................... 19
Preparation ........................................................................................ 19
Performing the leak test—EPC inlets ............................................ 21
Performing the leak test—manual inlets ....................................... 24
Leak testing the EPC module only.......................................................... 26
Forward pressure valve leaks ......................................................... 27
Locating leaks on the flow manifold .............................................. 27
Correcting leaks ................................................................................ 29
Potential leak points......................................................................... 30
220 Purged/Packed Inlet
Theory of operation.................................................................................... 1
EPC inlet .............................................................................................. 1
Manually controlled inlet ................................................................... 3
Replacement procedures ........................................................................... 4
Replacing the inlet .............................................................................. 4
Replacing an EPC flow manifold ...................................................... 8
Replacing the supply fitting on a Type 1 EPC manifold................. 9