13 Maintaining the NPD
To Maintain the NPD Collector, Ceramic Insulators, and Jet
Maintaining Your GC 223
Figure 45. NPD collector, upper insulator, and metal C-ring
13 Use tweezers to remove the lower ceramic insulator and the two small metal C-rings
located above and below the collector. If these parts are stuck together, do not separate
them. If they are not stuck, remember which metal ring was on top of the insulator and
which was below it. The pieces must be reassembled in the same orientation.
Figure 46. NPD lower ceramic insulator and metal C-ring
14 If not replacing the jet, skip to step 21.
15 Remove the column from the detector.
16 Loosen the jet with a nut driver.
Metal C-ring, top
Ceramic insulator, upper
Collector
Metal C-ring, bottom
Ceramic insulator, lower
Metal C-ring, bottom
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