Circuit for compensating non-linearities in electrolyte conducti

Details Circuit for compensating non-linearities in electrolyte conducti Circuit for compensating non-linearities in electrolyte conducti

1985-01-09

1987-07-28

Levy, Stewart J.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

204406, G01N 2706

Patent

active

046834354

ABSTRACT:
A circuit for measurement of the conductance of an electrolyte cell is disclosed which features compensation for non-linearities produced by resistance in series with the resistance of the cell and for non-linearities caused by polarization of the cell due to chemical, kinetic or other effects within the cell. The cell is driven by an AC signal, and the circuit features a feedback loop in which a portion of the AC output signal is fed back for compensation of the series resistance and in which an op-amp generates a compensating DC voltage, both of which are summed with the AC excitation signal prior to its being supplied to the cell.

REFERENCES:
patent: 3972002 (1976-07-01), Aprille, Jr.
patent: 4227151 (1980-10-01), Ellis et al.

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