Flowmeter fault detection

Details Flowmeter fault detection Flowmeter fault detection

2005-01-18

2005-01-18

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

Reexamination Certificate

active

06843137

ABSTRACT:
A previously unidentified problem of clipping in the input stages of flowmeter sensing circuitry has been identified and addressed. A solution is provided by flowmeter sensing circuitry, comprising:first and second inputs for connection to potential sensing electrodes positioned to measure a potential difference across the fluid which potential is representative of flow;differential amplifier means coupled to the first and second inputs for producing an output signal indicative of said potential difference across the fluid as a measure of flow; characterized byat least one voltage sensing means for sensing a voltage of at least one of the first and second inputs relative to a ground reference; andfault detecting means for detecting a potential fault if the voltage is outside a predetermined range.

REFERENCES:
patent: 4676112 (1987-06-01), Uematsu et al.
patent: 5370000 (1994-12-01), Herwig et al.
patent: 5388465 (1995-02-01), Okaniwa et al.
patent: 5907103 (1999-05-01), Budmiger
patent: 6154374 (2000-11-01), Uejima et al.
patent: 6172883 (2001-01-01), Kates et al.
patent: 0 939 483 (1999-09-01), None
patent: 2 333 161 (1999-07-01), None

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