Method to provide a quality measure for meter verification results
AssigneeInvensys Systems, Inc.
InventorsMichael T. Plaziak, Wade Mattar
Life of this patent
Estimating the term…
Abstract
A system for evaluating a flow rate measurement includes a flowmeter and a diagnostic system. The diagnostic system is configured to perform a diagnostic test for detecting a physical change in the flowmeter that could impair operation of the flowmeter, output a result of the diagnostic test, evaluate a reliability of the diagnostic test using information about a process condition, and output an indication of the reliability of the diagnostic test.
Claims20
A method for evaluating a Coriolis mass flowmeter having a flowtube, a driver for driving the flowtube, a pair of sensors for sensing a vibrational response of the flowtube at different locations and providing signals representative of the vibrational response, and a processor configured to determine a mass flow rate of a fluid flowing through the flowtube based on a phase difference between the sensor signals, the method comprising:
- performing a diagnostic test for detecting a physical change in the flowtube that could impair operation of the Coriolis mass flowmeter;
- outputting a result of the diagnostic test;
- evaluating a reliability of the diagnostic test using information about process conditions;
- and
- outputting an indication of the reliability of the diagnostic test.
A system for evaluating a mass flow rate measurement, the system comprising:
- a Coriolis flowmeter comprising:
- a flowtube;
- a driver for driving the flowtube;
- and
- a pair of sensors for sensing a vibrational response of the flowtube at different locations and providing sensor signals representative of the vibration;
- and
- a diagnostic system configured to:
- perform a diagnostic test for detecting a physical change in the flowtube that could impair operation of the Coriolis mass flowmeter;
- output a result of the diagnostic test;
- evaluate a reliability of the diagnostic test using information about a process condition;
- and
- output an indication of the reliability of the diagnostic test.
Dependencies are inferred from the claim text.