Installing The Filaments - ABB PGC2000 Operation And Service Manual

2. Remove the mounting bracket cover by sliding it out and away from the detector assembly.
3. Remove the insulating material from the mounting bracket.
4. If they are not already labeled, label the wire pair connected to the measurement filament "M" and
the wire pair connected to the reference filament "R".
5. If the detector filament wiring connections are spliced, perform steps 6 through 8. If they are not
spliced, go to step 9.
6. Position the detector wiring such that the wired splices can be accessed.
7. Cut and remove the heat shrink from each of the spliced filament wire connections to expose the
soldered connections.
8. Using a 40 watt soldering iron, de-solder and disconnect the wire splices.
9. If the detector filament wiring connections are not spliced, cut the existing detector harness wires
approximately three inches from the detector end.
10. Remove the harness retaining clamp and free the harness.
11. Clean the area around the two detector filaments to reduce the chance of foreign particles
entering the detector cavity when the filaments are removed.
12. Loosen the two detector filament retaining gland nuts with a 3/8-inch open-end wrench. Continue
to loosen by hand.
13. Carefully extract the filaments from the detector cell cavity.

Installing the Filaments

Replacement filament installation kits are supplied with two cable glands, a wire spreader, 736 RTV,
high temperature solder, and heat shrink.
1. Cut the four filament wires approximately the same length as the wires on the filaments that were
removed.
2. Insert one pair of filament wires through the threaded end of the gland nut, then carefully insert
the filament into the detector cell cavity marked "M" (measurement).
3. Slide the nut down the length of the wires to insert and align it with the measurement cavity.
4. Tighten the cable gland finger tight, then finish tightening with a 3/8-inch open-end wrench.
5. Insert the second pair of filament wires through the threaded end of the gland nut, then carefully
insert the filament into the detector cell cavity marked "R" (reference).
6. Slide the nut down the length of the wires to insert and align it with the reference cavity.
7. Tighten the cable gland finger tight, then finish tightening with a 3/8-inch open-end wrench.
8. Using wire strippers, remove approximately 1/4 inch of insulation from the end of each detector
filament wire.
8-24 2000-OSM, F1