Patent ID: 7392686
Filing Date: 2008-07-01
Classification: G01L

Abstract:
1. A calibration apparatus for vacuum gauge having a combined use for a 1 Torr level, a 10 Torr level, and a 100 Torr level vacuum gauge, in which a standard pressure gauge is installed within a pressure vessel for calibrating a vacuum gauge, the apparatus comprising: a balance mounting shaft installed vertically within the pressure vessel and provided with a plurality of balance mounting bases spaced apart from one another at predetermined intervals along an axial direction, the balance mounting shaft being connected at a lower portion thereof to the standard pressure gauge; a plurality of sets of balances mounted and supported on the balance mounting bases, each of said sets of balances being composed of a plurality of balances; means for elevating one or more balance of the plurality of sets of balances from its respective balance mounting base or for arranging the balance on the balance mounting base; and means for controlling the operation of the elevating means based on commands received from outside.