DEVICE FOR MEASURING CONDUCTANCE Russian patent published in 1994 - IPC

FIELD: measurement technology. SUBSTANCE: device for measuring the conductance has a controlled oscillator of sine-shaped voltage, two terminals, a capacitor, a resistor, a lower-pass filter. An alternating voltage amplifier, a shaper of antiphase square voltage pulses from the sine-shaped ones, a synchronous detector with a synchronous filter are introduced into the device. The stabilized source of the sine-shaped voltage creates current flow through series connected measuring two-electrode cell and resistor. The voltage on the resistor is proportional to the conductance value. It is amplified, filtered from the noise of the amplification first stage, from interferences and adjustments, is converted into the constant voltage and is measured by the constant voltage recorder. EFFECT: enhanced accuracy of measurement and control of electric parameters. 1 dwg