Cleaning 2D-C Prisms

  1. Unscrew the end caps.
  2. Use allen wrench to unscrew the prisms from the probe arms.
  3. Slide heater and prism assembly out of probe arms.
    • In the right-hand probe arm, the holes for the hex screw can be seen in both the prism assembly and the probe arm.
  4. Clean the prisms with isopropyl alcohol.
  5. Insert the heater and prism assembly back into probe arms.
  6. Make sure the set screw is set correctly.
  7. Screw the end caps back on.
  8. Clean the prism above the image diodes inside the 2D-C with isopropyl alcohol.
    • The prism can just be seen under the crossbar in this picture above the image diodes.
  9. When done cleaning prisms, verify that the end element voltages for both end are over 2V by attaching a voltmeter as demonstrated in the picture below. Make sure that on one side of the probe, the dial is set to 1 and for the other the dial is set to 32.