Method and apparatus for validating the accuracy of a flowmeter

Details Method and apparatus for validating the accuracy of a flowmeter Method and apparatus for validating the accuracy of a flowmeter

2005-01-18

2005-01-18

Raevis, Robert (Department: 2856)

Measuring and testing

Test stand

For engine

Reexamination Certificate

active

06843110

ABSTRACT:
A method and apparatus for testing sensors in a fluid flow conduit to verify the accuracy of the flowmeter of which the sensors are a part. Where two similar sensors are employed, active and reference sensor functions are interchanged to verify their functioning accuracy. Alternatively, different stimulation levels can be used to provide a basis for cross-correlation of sensor outputs. A single, or multiple, time-shared sensor can be employed in place of two sensors. Transient or steady state responses are employed. Many sensor types can be used.

REFERENCES:
patent: 4389886 (1983-06-01), Korczak
patent: 4509373 (1985-04-01), Brown
patent: 5359878 (1994-11-01), Mudd
patent: 6305232 (2001-10-01), Ohle et al.
Primayer-ABB Channel Partnership, CalMaster—In-situ Calibration Verification, Internet web page (1 page), no date.
Kurz et al., Variable Correction Factor (“VCF”) In-Situ Calibration Procedure, Internet web page (2 pages), no date.
Panametrics, Inc., Digitalflow™ GF868 Mass Flowmeter trade literature (4 pages) (Dec. 2000).

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