Changing the clear and opaque chamber bowls

Two types of long-term chamber are available for the LI-8250. One features a white bowl with radiation shield, and one features a clear bowl. Chamber bowls can be swapped for another with the chamber upgrade kits. 8200-910 is the clear chamber upgrade kit, which is to swap the white bowl for a clear one. 8200-911 is the opaque chamber upgrade kit, which is to swap the clear bowl for a white one. This document describes how to exchange one chamber bowl for the another.

The upgrades requires a 3/8" wrench and a #1 Phillips screwdriver. It will take less than 30 minutes to complete this procedure, typically.

  1. Make sure that the chamber is in the Park position before starting.
  2. If the chamber is not parked, power it on by connecting to the multiplexer and press the OPEN/CLOSE button twice rapidly. Then disconnect the cable to power off the chamber.
  3. Remove the two screws that secure the cable and tubing bundle to the side of the housing and disconnect the thermistor cable.
  5. Remove the two nuts, lock washers, and flat washers that secure the arm of bowl assembly.
  7. Lift the bowl assembly from rotating mechanism.
  8. Reinstall the flat washers, lock washers, and nuts on the arm for storage.
  9. Remove the flat washers, lock washers, and nuts from the underside of the new arm assembly.
  10. Place the arm assembly into position on the opening and install the flat washer, lock washer, and nuts; make them finger tight.
  11. The nuts should be loose enough to allow adjustment of the bowl.
  12. Adjust the alignment of the chamber bowl so it is centered over the opening.
  14. Tighten the nuts when the chamber is aligned.
  15. Install the screws that secure the cable and tubing bundle and attach the thermistor cable.

Bowl replacement is complete.