Compensation of instability of contact resistance of capacitive transducer in an input measuring circuit
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Theoretical prediction and experiment revealed that the use of a parallel-resonant circuit operated with slight frequency detuning, in the input measuring circuit, makes it possible to enhance the stability of the measurements appreciably.
At the practically attainable parameters of components of the resonant circuit, the compensating action of the detuned resonant circuit in response to changes in the contact reactance of the capacitive transducer attaining tens of percents will exceed by a whole order of magnitude the accuracy of measurements obtained when using a parallel circuit operating at the resonant frequency, in the input circuit of the device.
KeywordsPhysical Chemistry Analytical Chemistry Theoretical Prediction Resonant Frequency Contact Resistance
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- 1.G. I. Atabekov, Theoretical Fundamentals of Electrical Engineering [in Russian], Pt. 1, Énergiya, Moscow-Leningrad (1966).Google Scholar