Agilent Technologies 6890 Series Service Manual page 12

Contents
341 Micro-cell Electron Capture Detector (µ-ECD)
Theory of operation .................................................................................... 1
EPC detector........................................................................................2
Replacement procedures ........................................................................... 3
Replacing the entire detector/detector cell ..................................... 3
Replacing the heater/sensor assembly ............................................. 6
Replacing the makeup gas adapter ................................................... 9
Removing an EPC flow manifold .................................................... 11
Installing a Type 2 manifold............................................................. 13
Removing the signal board............................................................... 18
Replacing the detector interface card ............................................ 20
Diagnostics................................................................................................. 22
Frequency test ................................................................................... 22
Leak test .............................................................................................23
Maintaining a µ-ECD detector ................................................................. 25
µ-ECD bakeout (thermal cleaning) ................................................. 25
Performing a radioactivity leak test (wipe test)............................ 26
350 Flame Photometric Detector (FPD)
Theory of operation .................................................................................... 1
Single wavelength FPD....................................................................... 2
Dual wavelength FPD ......................................................................... 3
Operating conditions .......................................................................... 3
Replacement procedures ........................................................................... 4
Replacing the entire detector ............................................................ 4
Column installation .............................................................................6
Cleaning/replacing windows, filters, and seals ............................... 8
Cleaning/replacing the jet ................................................................ 12
Replacing the transfer line fused silica liner ................................. 15
Replacing the photomultiplier tube ................................................18
Replacing the heater/sensor assemblies ........................................ 20
Replacing the ignitor glow plug....................................................... 22
Removing an FPD flow manifold .................................................... 24
Installing a Type 2 manifold............................................................. 25
Jun 2001
Contents
Agilent 6890 Gas Chromatograph Service Manual
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