LRS Micro-g LaCoste FG5, Manual, Page: 38 / 149

How to Set Up and Run the FG5
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Note: While leveling the superspring and dropping chamber tripods, note that
turning the tripod feet clockwise
lowers the dropping chamber tripod and raises
the superspring tripod.
3.1.3.INTERFEROMETER
15. Remove the interferometer base from its shipping case taking care not to
stress the fiber optic. Remove the dust cap from the top superspring window
and place the interferometer base on the superspring. Orient the
interferometer base so the fiber optic input is located directly above the
superspring travel lock. The alignment pins on the top of the superspring
assure that the interferometer base is oriented correctly.
16. Lock the interferometer base in place by tightening the four 5-lobe knobs.
3.1.4.DROPPING CHAMBER TRIPOD
17. Remove the tripod tray from the superspring case and place it carefully
upside down on the floor.
18. Remove the three tripod legs from the dropping chamber case and attach
them to the tray. Tighten the legs by using the ~30 cm “cheater” bar.
19. At this point the interferometer will be used to support the dropping chamber
tripod. First, remove the dust cap from the top of the interferometer base.
20. Carefully place the dropping chamber tripod on the interferometer. Orient
the tripod so that the small hole is
21. Carefully remove the dropping chamber from its case by the handles and
gently place it into the pocket in the top of the tripod tray, allowing the two
vertical alignment pins in the tray to engage the sockets in the dropping
chamber base. Orient the dropping chamber so the ion pump is directly
above the beam blocker controls on the interferometer.
22. Lock the dropping chamber in place with the three clamps by turning the 5-
lobe knobs fully clockwise. This rotates the dropping chamber clamps in
place over the base of the chamber.
23. Release the cart travel lock by turning the motor shaft slightly
counterclockwise with a 4 mm hex wrench or ball driver to release the
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