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Method and apparatus for measuring volume

  • US 4,430,891 A
  • Filed: 12/21/1981
  • Issued: 02/14/1984
  • Est. Priority Date: 12/21/1981
  • Status: Expired due to Fees
First Claim
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1. The method of measuring the volume of a test chamber by comparing it with a reference chamber of known volume comprising the steps of:

  • sealingly closing both chambers;

    while maintaining the temperatures of the two chambers substantially equal, injecting accurately related quantities of a gas into each chamber;

    comparing the pressures in each chamber and reading the difference as a function of the volume of the test chamber; and

    reading the rate of change of the pressure difference in the two chambers as a function of chamber leakage and disregarding the volume measurement if the rate exceeds a determined value.

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