Flowmeter having active temperature compensation

Measuring and testing – Volume or rate of flow – With indirect temperature or density compensation

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73861, G01F 1502

Patent

active

055445314

ABSTRACT:
A method and apparatus for measuring fluid flow is characterized by compensating for temperature variations in the fluid level pressure transducer. The transducer is operated at a plurality of different combinations of pressure and temperature, and the drive and output voltages of the transducer are measured at each combination. A plurality of temperature coefficients are derived from the measured voltage and entered into a data logger for use in calculating flow.

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patent: 4475407 (1984-10-01), Kruncos
patent: 4668102 (1987-05-01), Mott
patent: 4715003 (1987-12-01), Keller et al.
patent: 4765188 (1988-08-01), Krechmery et al.
patent: 5237523 (1993-08-01), Bonne et al.
patent: 5253532 (1993-10-01), Kamens
Brysek et al, "Silicon Sensors and Microstructures," Sep. 1991.
"Temperature Compensation IC Pressure Sensors", IC Sensors, Mar. 1985.
Tasker, Richard E., "What Transducer Performance Specs Really Mean" Sensors Nov. 1988.

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