320 Nitrogen Phosphorus Detector (NPD)
Replacement procedures
12 of 32
Jun 2001
Detectors
Agilent 6890 Gas Chromatograph Service Manual
Caution Make sure you are properly grounded with an ESD strap before continuing.
6. Unclip the bead drive cable and the electrometer ribbon cable from the
detector’s interface board on the right side of the instrument.
Figure 320-5 Location of the detector pallet screws and the NPD interface board
connectors
7. Follow the heater/sensor cables back to their connector to the right of
the detector interface card and disconnect them.
8. Loosen the four captive Torx T-20 screws from the top of the detector
pallet and remove the detector from the instrument.
9. Reassembly is the reverse of removal.
When reinstalling the detector pallet, make sure that the detector board
seats in the slot on the bottom of the pallet.
Electrometer ribbon
Bead drive connector
Torx T-20 screw
Detector
pallet
cable connector
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