To change the setup from In-air to Vacuum, do the following:

 1. Ask the users to finalize position of their setup before turning the In-air positioning system off.
 2. Go to the PSP counting room and turn off the position-control box.
 3. Flip the downstream shutter switch from In-air to Vacuum.
 4. Inhibit the detector power supplies.
 5. Go to the Cave and close the manual valve downstream from the vacuum chamber.
 6. Make sure that the bypass line for that valve is closed.
 7. Loosen the screws holding the upstream blank flange.
 8. Start venting the vacuum chamber.
 9. Slowly open the bypass line.
10. After awhile, open the manual valve downstream from the vacuum chamber.
11. When the chamber is up to air, open it.
12. Install the slits.
13. Disconnect cables with DB25, DB9, and power connectors from In-air system and connect them to Vacuum system.
14. Disconnect eight black BNC cables from those hanging from the downstream detector flange and connect them to the corresponding white BNC cables.
15. Disconnect two black BNC cables from the side of the downstream detector chamber and connect them to the corresponding white BNC cables.
16. Replace the upstream blank flange with the upstream detector assembly.
17. Connect eight white BNC cables to the flange with the upstream detector assembly.
18. On the video selector located next to the monitor push the Vacuum button.
20. Go to the PSP counting room and turn on the position-control box.
21. Go to the Cave and home all axes.
22. Make sure that the downstream shutter and the camera work.
23. Let the users install their board.
24. Make sure that the manual valve downstream from the vacuum chamber is closed.
25. Make sure that the bypass line for that valve is closed.
26. Close the chamber and start pumping.
27. When the ion gauge for the vacuum chamber comes on, go to the PSP counting room and un-Inhibit the detector power supplies.

