Patent ID: 8201438

Claim:
A non-alternating current-powered method for determining the volume of a closed test container, comprising: connecting a closed test container and compressed gas source to a diagnostic device for determining gas leakage, said diagnostic device comprising a non-alternating current-powered system comprising a housing onto which is mounted a first pressure measurement means for measuring absolute pressure, a second pressure measurement means for measuring a differential pressure and a control valve for directing fluid flow, a manifold connected to said control valve, said control valve capable of directing fluid flow through said manifold, said manifold fluidically connected to said first pressure measurement means and to said second pressure measurement means; a container of known volume fluidically connected to said manifold, and a vacuum means for creating a vacuum fluidically connected to said manifold; evacuating said container of known volume to a determined vacuum pressure; venting the closed test container and manifold to a determined atmospheric pressure; fluidically isolating said manifold and container of known volume and establishing a fluidic connection between said manifold and container of known volume; calculating the manifold volume; establishing a fluidic connection between said closed test container and said manifold and container of known volume; measuring the resulting differential pressure; and calculating the volume of said closed test container.