Differential pressure based flow measurement
AssigneeRosemount Inc.
InventorsDavid L. Wehrs, John P. Miller, Andrew J. Klosinski
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Abstract
A system for measuring flow of process fluid through process piping in an industrial process includes a flow restriction element in the process pipe. A first differential pressure transmitter is configured to measure a first differential pressure across the flow restriction element in response to flow of process fluid. A second differential pressure transmitter configured to measure a second differential pressure in the process fluid across the flow restriction element. Circuitry performs diagnostics based upon the first differential pressure and the second differential pressure.
Claims26
A system for measuring flow of process fluid past a flow restriction element positioned in process piping in an industrial process comprising:
- a first differential pressure transmitter configured to measure a first differential pressure in the process fluid due to flow of process fluid past the flow restriction element;
- a second differential pressure transmitter configured to measure a second differential pressure in the process fluid due to flow of process fluid past the flow restriction element;
- and
- circuitry configured to perform diagnostics based upon the first and the second differential pressures.
A method of performing diagnostics in a flow measurement system configured to measure flow of process fluid past a flow restriction element carried in process piping in an industrial process, in the method comprising:
- measuring a first differential pressure across the flow restriction element using a first differential pressure transmitter;
- measuring a second differential pressure across the restriction element using a second differential pressure transmitter;
- diagnosing operation of the flow measurement system using a parameter calculated from the measured first differential pressure and the measured second differential pressure.
Dependencies are inferred from the claim text.