Tunable empty pipe function

Details Tunable empty pipe function Tunable empty pipe function

2006-08-22

2006-08-22

Thompson, Jewel V. (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

Reexamination Certificate

active

07093500

ABSTRACT:
An electromagnetic flowmeter for measuring a flow rate of a fluid in a pipe is described. A pipe carries a fluid. A magnetic coil is disposed adjacent to the pipe for inducing a magnetic flux in the fluid. A plurality of electrodes are disposed within the pipe, and the plurality of electrodes are electrically isolated from one another. Measurement circuitry is coupled to at least one of the plurality of electrodes and is configured to measure flow rate as a function of a potential across the plurality of electrodes. An empty pipe detector is coupled to at least one of the plurality of electrodes and is adapted to detect an empty pipe condition based upon an adjustable test criteria. In one embodiment, a local operator interface is coupled to the empty pipe detector for adjusting the adjustable test criteria.

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