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Jun 2001
Detectors
Agilent 6890 Gas Chromatograph Service Manual
Nitrogen Phosphorus Detector (NPD) 320
Replacement procedures
1. At the front of the manifold, remove the Torx T-20 screw that holds the
manifold in its slot.
2. Remove the following covers: plastic detector and pneumatics covers,
metal pneumatics RFI cover, rear top metal cover.
3. Remove the gas supply fittings from the side (Type 1) or rear (Type 2) of
the manifold.
4. Disengage the detector tubing from the slots in the chassis so that the
gang fitting on the manifold can be removed easily.
5. Remove the Torx T-20 screw holding the pneumatics block to the manifold
and remove the block. On Type 1 manifolds, slide the manifold slightly
to the rear to reach the screw.
Caution Make sure you are properly grounded with an ESD strap before continuing.
Figure 320-11 Removing the detector EPC flow manifold
Pneumatics
block
T-20 screw
Typ e 1 manifol d
Typ e 2 manifol d
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