Part of the relevant dialogue via the-big-bang-theory.com:
Howard: Step one, rapidly flip the calibration switch from the fully up to the fully down positions for at least ten times.
Sheldon: It actually says "at least"?
Howard: Yeah.
Sheldon: Why would they say "at least"? Is it 10 toggles? Is it 100 toggles? Is it 1,000 toggles? 10,000 toggles? 100,000 toggles?
Howard: Sheldon!
Sheldon: You see where I'm going with this.