Leak Test; Potting The Filaments (Cenelec And Csa Only) - ABB PGC2000 Operation And Service Manual

5. Slide the insulating sheath of each filament back to reveal the stranded wire, install approved
heat shrink over each of the four filament wires, and slide it as far from the free wire end as
possible.
6. Select a harness assembly wire with the "R" label designation and overlap the "tinned" ends of
this harness wire with one of the reference filament wires.
7. Solder the wires using a 40 watt soldering iron and approved high temperature solder. Apply
solder sparingly, allowing it to flow evenly. Do not overheat the solder or a high resistance
connection could result.
8. Repeat steps 6 and 7 for the remaining harness wire labeled "R" and reference filament wire.
9. Repeat steps 6 through 8 for harness wires labeled "M" and the measurement wires.
10. Slide heat shrink over each connection and shrink with a heat source.

Leak Test

1. Restore carrier to the analyzer and establish carrier flow to both the measurement and reference
ports of the detector.
2. Verify carrier and reference flow using a flow meter. Typically the flows should be 30 to 40cc per
minute if packed columns are used; 10 to 15 cc per minute if 0.53 mm ID capillary columns are
used, and 3 to 5 cc per minute if 0.32 mm ID capillary columns are used.
3. Test for leaks around the detector filament gland nut with a nonconductive liquid leak detection
solution. Correct all leaks before proceeding.
4. Shut off the carrier supply to the analyzer.
5. Gently remove any excess leak detection solution with a soft cloth or tissue and blow dry with 15
psig clean dry air, helium or nitrogen.

Potting The Filaments (CENELEC and CSA Only)

Perform this procedure if you know that your analyzer is constructed to CENELEC or CSA
specifications or if the existing detector filament is potted.
1. Gently slide the insulation sheath out of and away from the gland nut.
2. Using a syringe filled with Silastic compound "Dow 736 RTV," completely fill the gland cavity with
the Silastic compound.
3. With the insulation still pulled away from the gland nut, use needle nosed pliers to install the wire
spreader.
4. Separate and insert filament wires into the slots on either side of the spreader. The spreader
should be positioned between the end of the sheath insulation and the back of the gland nut.
5. Press the spreader into the recess in the gland nut. The retainer must be installed such that it is
not in anyway tilted. It is normal for the retainer to protrude slightly from the gland recess.
6. Slide the sheath insulation toward the wire spreader until it contacts the face of the spreader.
7. Replace the mounting bracket insulation.
8-26 2000-OSM, F1