Method and apparatus for determining the accuracy of a gas flow meter
US4821557A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1988 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | Mar 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F25/15
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for determining (i.e., proving) the accuracy of a gas flow meter includes the use of a flow determining valve to derive flow data representative of actual gas flow rate simultaneously with similar flow data obtained from the meter. Real time quantitative analysis of the gas stream constituents is employed during meter proving (as may be accomplished with an automated gas chromatograph) so as to condition the flow data obtained from the flow determining valve and hence provide a more accurate determination of actual gas flow rate. This conditioned flow data is then compared to the flow data obtained from the meter to thereby derive a variance factor for the meter at given sensed flow rates. Therefore, flow rate data obtained from the meter may then be adjusted as a function of the derived variance factor so that a more accurate determination of actual flow rate through the meter is possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.