Electricity: measuring and testing – Electrolyte properties
Patent
1983-06-14
1985-05-07
Tokar, Michael J.
Electricity: measuring and testing
Electrolyte properties
324442, 324 57R, G01N 2742
Patent
active
045160775
ABSTRACT:
The intrinsic time constant .tau. of liquids is measured directly by using he apparatus of the present invention termed a "taumeter". The taumeter impresses a predetermined voltage, level between a pair of electrode immersed in the liquid to be measured. The taumeter then measures the time it takes for the foregoing voltage to decay from a predetermined value V.sub.A to a predetermined value V.sub.B. Comparator logic produces a gate pulse having a leading edge at a time T.sub.A corresponding to the occurrance of the predetermined voltage V.sub.A and a trailing edge at a time T.sub.B corresponding to the occurrance of the predetermined voltage V.sub.B. The gate pulse is used to gate a system counter which counts the zero crossings of a very accurate system clock to determine the intrinsic time constant of the liquid. The foregoing pulsing is repeated as determined by a duty cycle generator.
REFERENCES:
patent: 3584297 (1971-06-01), Koski
patent: 3711770 (1973-01-01), Wilson
patent: 3936735 (1976-02-01), deBough
Fenneman David B.
Hardesty, Jr. Leonard W.
Rinehart Larry F.
Beers Robert F.
Raevis Robert R.
The United States of America as represented by the Secretary of
Tokar Michael J.
Walden Kenneth E.
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