Electricity: measuring and testing – Electrolyte properties – Using a conductivity determining device
Patent
1986-07-22
1988-11-22
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrolyte properties
Using a conductivity determining device
324443, 324 65R, G01N 2742, G01N 2702
Patent
active
047868759
ABSTRACT:
A circuit for measuring the conductivity of a solution by applying a known ac current source across a pair of electrodes in the solution and utilizing an analog-to-digital dual slope converter, such as those of the integrated circuit type which include capacitor sampling of the signal input, for conversion of the ac voltage drop across the electrodes. The circuit includes means for synchronizing the ac current to the clock to time the sampling so that the same polarity of signal input is always obtained. Where the known ac current source consists of switching the sense of the electrode connections to a combination of a dc source in series with a known resistor, used for supplying the reference input to the converter, a dc signal input, instead of ac, obtained by including the voltage drop of the switch with the drop across the electrodes in the signal sampled. With this arrangement, higher cell constants can be used to minimize the effect of the voltage drop across the switch.
REFERENCES:
patent: 3170111 (1965-02-01), Case
patent: 3493857 (1970-02-01), Silverman
patent: 3495164 (1970-02-01), Dauphinee
patent: 3582767 (1971-06-01), Brum
patent: 3665302 (1972-05-01), Lees
patent: 3757205 (1973-09-01), Dauphinee
patent: 3946309 (1976-03-01), Roughton
patent: 3965414 (1976-06-01), Teass
patent: 4028618 (1980-03-01), Teass
patent: 4181880 (1977-06-01), Teass
patent: 4303887 (1981-12-01), Hill
patent: 4323972 (1982-04-01), Winter
patent: 4331923 (1982-05-01), Akers
patent: 4383221 (1983-05-01), Morey
patent: 4618818 (1986-10-01), Horn
patent: 4652830 (1987-03-01), Brown
patent: 4656427 (1987-04-01), Dauphinee
patent: 4682113 (1987-07-01), Barben
Eisenzopf Reinhard J.
General Signal Corporation
Huberfeld Harold
Miller, Jr. William G.
Solis Jose M.
LandOfFree
Conductivity measuring circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Conductivity measuring circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conductivity measuring circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-437307