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Jun 2001
Detectors
Agilent 6890 Gas Chromatograph Service Manual
Nitrogen Phosphorus Detector (NPD) 320
Replacement procedures
Figure 320-8 NPD detector collector
5. Use a pair of tweezers to lift out the metal C-ring (size 14), the alumina
insulator, and another metal C-ring (size 14).
6. Reassembly is the reverse of removal. Note that when replacing the lid
weldment, make sure the view tube on top of the weldment faces the
electrometer.
Captive T-20 screws (3)
Lid weldment
Top C-rin g
Alumina insulator
Collector assembly
C-ring (lower)
Alumina insulator
C-ring (upper)
Standoff
View tube
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