Cleaning/Replacing Windows, Filters, And Seals - Agilent Technologies 6890 Series Service Manual

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Flame Photometric Detector (FPD)

Replacement procedures

Cleaning/replacing windows, filters, and seals

Column bleed and/or effluent can contaminate the first quartz window (heat

shield) nearest the detector module. Dust, fingerprints, atmospheric

contaminants can dirty both quartz windows, the filter, and/or the

photomultiplier tube window. Contamination anywhere along the light path

between flame and PMT can reduce detector sensitivity.

Turn the electrometer off.

Turn hydrogen, air, and auxiliary gas supplies to the detector off. Turn

the heaters off. Wait for the detector to cool.

Always turn the electrometer off before removing the PMT housing to avoid

destroying the tube.

Release the retaining spring around the photomultiplier housing.

Agilent 6890 Gas Chromatograph Service Manual

6890a 6890 plus