Type B Npd Transformer/Collector Assembly - HP 5890 Series II Plus Reference Manual

Preventive Maintenance
Nitrogen-phosphorus detector (NPD)
lead on the collector body. Tighten the setscrew to secure the wire and
collar.

Type B NPD transformer/collector assembly

Figure 8-18.
Type B NPD Detector Assembly
Remove the transformer/collector assembly from the Type B NPD cover
as follows:
During disassembly do not touch the lower portion of the collector
Caution
assembly. Use clean, lint•freegloves to prevent contamination of the
assembly. Suitable gloves (HP Part No. 8650•0030)are available.
1. Remove the two screws holding the transformer inside the cover.
2. Remove the two screws holding the collector insulator to the cover.
These are removed from the top side.
3. Slide the transformer wires through the slot in the cover by
maneuvering the uninsulated portion of the wires to the slotted hole.
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