Maintaining the NPD 11
Maintaining Your GC 225
4 Load the GC maintenance method and wait for the GC to
become ready.
5 Remove the bead. (See “To Replace the NPD Bead Assembly”
on page 219.)
6 Remove the screws that secure the lid, and remove it. The top
metal C-ring and upper ceramic insulator may be attached to
the lid.
7 Remove the screws that secure the electrometer and the
interconnect.
WARNING
Be careful! The oven or detector fittings may be hot enough to
cause burns.
CAUTION
This step exposes the interconnect spring. Be careful not to touch or
disfigure the spring while working on the FID. Any dirt or bending
will reduce the sensitivity of your detector.
CAUTION
Wear clean, lint-free gloves to prevent contamination of parts with
dirt and skin oils.
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