An experimental setup to measure the conductivity of a solid or liquid sample utilizing multi-frequency LCR meter

Abstract

A computer-controlled automated data acquisition system is designed to measure the conductivity of the liquid (saline water) or the solid sample (rock saturated with saline water) in the frequency range 10 kHz to 2 MHz. The set-up is based on LCR (Inductor, Capacitor, and Resistor) multimeter and four-terminal sample holder system that was developed to reduce the contact resistance, to minimize any stray capacitance, and residual inductance associated with the test leads or the test fixture at high frequencies. However, the instrumentation calibration scheme cannot completely eliminate the aforementioned errors. In order to accomplish this, a calibration model is designed to compensate for the inherent error of the system. In this study, the conductivity of some samples was measured. The measured data was compared with conductivity provided by Society of Core Analysis Guideline (SCA-GL). The agreement between available data and experimental data is excellent.