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10 of 2 4 Jun 2001

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

Agilent Technologies 6890 Series Service Manual

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