Electricity: measuring and testing – Electrolyte properties – Using a conductivity determining device
Patent
1978-12-18
1980-09-09
Tokar, Michael J.
Electricity: measuring and testing
Electrolyte properties
Using a conductivity determining device
204195R, G01N 2742
Patent
active
042220068
ABSTRACT:
The present invention provides a means for compensating for temperature induced variations in the span and zero signals of an electrochemical detector. The invention comprises a first compensating circuit electrically connected to the output of the detector and includes a first thermistor and a first amplifier which compensate for all variations in the span signal as well as some variation in the zero signal. A second compensating circuit comprising a second thermistor and a power source and voltage divider network electrically connected to the second thermistor for adjusting zero current wherein the output of the second thermistor is algebraically added to the output of the first compensating circuit by a second amplifier connected to the outputs of the first and second circuit and includes a resistance feedback loop to the output of the second thermistor.
REFERENCES:
patent: 2828479 (1958-03-01), Jackson, Jr.
patent: 3382430 (1968-05-01), Cunniff et al.
patent: 3392333 (1968-07-01), Blondfield
patent: 3405048 (1968-10-01), Soltz
patent: 3909386 (1975-09-01), Oswin et al.
Catalyst Research Corporation
Tokar Michael J.
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