When the etalon needs to be dismounted from the IMACS disperser wheel, the CS-100 needs to first be turned off and unplugged from the etalon. Use the following procedure:

1. Release computer control of the CS-100 with the Etalon button in the HardHat GUI.
2. At the CS-100 front panel: Turn the Mode knob to Balance. Once the Balance light illuminates, turn the CS-100 off using the Power switch.
3. At the IMACS disperser wheel: Attach a clear fiberglass cover to side of the MMTF aperture. Remove the MMTF cables from their sockets.
4. Dismount MMTF!