| 摘要 |
<p>The present invention provides a system for measuring in an isolated rigid container (2), partially filled with a fluid, the volume Vu of that portion of the container that is not occupied by the fluid. Reservoir means for holding a fixed known volume of a measurement gas is placed in first valved communication with the container. Pressure means (8) is in second valved communication with the reservoir. The method comprises opening first valve (D) and reading equalised pressure P1 in container and reservoir. Closing first valve (D) and opening second valve (J) to pressurise reservoir and reading pressure P2. Closing second valve (J) and reopening first valve (D) and measuring final equalised pressure P3. Evaluating Vu according to Boyle's law for ideal gases.</p> |
