Accessing The Polarizer And Ignitor Elements; Replacing The Polarizer - ABB PGC2000 Operation And Service Manual

15. Slide the heat shrink over the soldered connection and shrink it with a heat gun.
16. Reconnect the red coaxial cable to the top of the detector.
17. Close and secure the isothermal oven door.

Accessing the Polarizer and Ignitor Elements

1. Disconnect the red coaxial cable located on the top of the detector.
2. Cut cable ties securing the detector element assembly wiring and straighten the wires to
increase accessibility.
3. Remove the breather as described in "Replacing the Breather."
4. Visually trace the capillary tubing connections from the detector to the nearest unions. Place
temporary tape labels on each side of the union tubing connections.
5. Disconnect the associated capillary connections at the unions.
Steps 6 through 8 are required only for Temperature Programmed analyzers.
6. Rotate the detector cover latch counterclockwise until it is freed from the detector body.
7. Slide the detector cover from the detector heater housing and set aside.
8. Remove enough of the insulation from the detector heater housing to expose the polarizer and
ignitor; retain it for later use.
9. Position the wiring and capillary tubing such that the housing can be lifted from the detector base
up over the detector, then lift off the housing, fully exposing the detector body and elements.

Replacing the Polarizer

1. After accessing the detector elements as described in "Accessing the Polarizer and Ignitor
Elements," locate the polarizer as identified by the element with the single green wire.
2. If applicable, remove any cable ties and free the wiring to expose the wire splices.
3. Cut and remove the heat shrink and glass tape from the green wire to expose the soldered
connection.
4. Using a 40 watt soldering iron, disconnect the wire splice.
5. Using a 3/8-inch open-end wrench, carefully remove the polarizer assembly. Note its location for
reassembly.
6. Carefully insert the replacement polarizer into the detector body and finger tighten, taking care
not to damage it. Finish tightening using a 3/8-inch open-end wrench.
7. Roll each end of the green wire of the new polarizer between your forefinger and thumb, causing
the wire ends to be tightly spiral wrapped.
8. Using the 40 watt soldering iron and approved high temperature solder, "tin" the wire ends.
8-18
NOTE
2000-OSM, F1