| 摘要 |
<p>A system for measuring flow of process fluid through process piping, includes a flow restriction in the process piping generating a differential pressure between an upstream side of the restriction and a downstream side of the restriction. The differential pressure is related to flow of the process fluid. First and second upstream pressure transmitters are coupled to the process piping on the upstream side of the flow restriction and measure respective first and second upstream pressures. First and second downstream pressure transmitters are coupled to the process piping on the downstream side of the flow restriction and measure respective first and second downstream pressure of the process fluid. Flow rate of the process fluid is calculated based upon at least one upstream pressure and one downstream pressure. Further, degradation in at least one of the pressure transmitters is identified based upon at least two pressure measurements.</p> |
