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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: A procedure for stable electrical measurements on a rock sample against high contact resistance as a prerequisite for electrical tomography

Fig. 9

Estimated contact resistance and sample resistance with respect to absolute humidity. Resistances between current electrodes C1 and C2 are plotted as a function of the absolute humidity in log scale. The dashed line represents exponential fitting results, and the symbols indicate the measurement sequence. Sample resistance was estimated numerically from the measured current and potential difference values in Fig. 8a, b. Contact resistance is half of the value obtained by subtracting the estimated sample resistance from the measured resistance value in Fig. 8c

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