Apparatus for applying a temperature flow coefficient in a vibrating flowmeter and related method
AssigneeMicro Motion, Inc.
InventorsGregory Treat Lanham, Anthony William Pankratz
Life of this patent
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Abstract
A method for calibrating a flowmeter is provided that comprises determining a relationship between tube period ratio and a flow tube temperature compensation (FTC) value for a plurality of flowmeters. Tube periods of the flowmeter under test are measured. A stiffness-correlated FTC is calculated using the determined relationship between the tube period ratio and the FTC value for the plurality of flowmeters and the measured tube periods of the flowmeter under test. The stiffness-correlated FTC is applied to an operating routine (314) of the flowmeter under test.
Claims17
A method for calibrating a flowmeter comprising:
- determining a relationship between tube period ratio and a flow tube temperature compensation (FTC) value for a plurality of flowmeters;
- measuring tube periods of a flowmeter under test;
- calculating a stiffness-correlated FTC using the determined relationship between the tube period ratio and the FTC value for the plurality of flowmeters and the measured tube periods of the flowmeter under test;
- applying the stiffness-correlated FTC to an operating routine of the flowmeter.
A flowmeter (5) comprising:
- a meter electronics (20) comprising a processing system (303) and a storage system (304);
- a plurality of pickoffs (105, 105′) affixed to a flowmeter (5) conduit (103) in communication with the meter electronics (20);
- a driver (104) affixed to flowmeter (5) conduit (103) in communication with the meter electronics (20);
- wherein the meter electronics (20) is configured to apply a stiffness-correlated FTC to an operating routine (314), wherein the stiffness-correlated FTC is calculated using a predetermined relationship between a tube period ratio and an FTC value for a plurality of flowmeters and measured tube periods of the flowmeter (5);
- and
- an operating routine (314) of the meter electronics (20) is configured to apply the stiffness-correlated FTC thereto.
Dependencies are inferred from the claim text.