Agilent Technologies 6890 Series - The 6890 Series Gas Chromatograph

10 of 2 4 Jun 2001
Contents
Contents
Agilent 6890 Gas Chromatograph Service Manual
Diagnostics ................................................................................................ 32
Quenching effects ............................................................................. 32
PMT saturation.................................................................................. 32
Detector temperature considerations ............................................ 32
Flame ignition problems .................................................................. 33
Leak testing................................................................................................ 35
Potential leaks areas......................................................................... 35
360 Auxiliary EPC
Theory of operation.................................................................................... 1
External flow restrictor (Type 2 manifold) ..................................... 1
Replacement procedures ........................................................................... 4
Removing the auxiliary manifold (type 1 or type 2)....................... 4
Installing a type 2 manifold................................................................ 6
Changing an auxiliary channel frit.................................................. 14
400 Mainframe
410 Covers and Fans
Plastic covers .............................................................................................. 1
Metal covers ................................................................................................ 2
Removing the electronics cover................................................................ 3
Removing the detector cover .................................................................... 4
Replacing the detector top cover.............................................................. 6
Removing the pneumatics top cover........................................................ 8
Removing the pneumatics RFI shielding ................................................. 8
Removing the left side cover..................................................................... 9
Removing the right side cover................................................................. 10
Removing the ALS tray bracket .............................................................. 11
Removing the inlet carrier cover ............................................................ 12
Removing the inlet carrier ....................................................................... 13
Removing the rear covers........................................................................ 14
Removing the top rear cover ........................................................... 14
Removing the bottom rear cover .................................................... 15
Removing the injection port fan cover................................................... 16