Liquid gaging system null balance circuitry

Details Liquid gaging system null balance circuitry Liquid gaging system null balance circuitry

G - Physics

01

F

73/0.5

G01F 25/00 (2006.01) G01F 23/26 (2006.01)

Patent

CA 1164239

ABSTRACT Circuitry for nulling a signal from a capacitive sensor apparatus with a signal from a reference. The invention includes capacitive sensor apparatus for providing a liquid measurement signal. Also included is reference apparatus for selectively providing a series of reference signals having predetermined amplitudes, the reference apparatus having terminal apparatus for receiving rebalance approximation sequence control signals for selectively controlling the signal amplitudes. The invention further includes null detecting apparatus for detecting the pres- ence of a null, the null detecting apparatus being connected to the capacitive sensor apparatus and the reference apparatus.

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