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Title: Advances In Dc And Low Frequency Metrology I
Author: Patrick Snyder Stuart Streiff Peter Crisp
Source: 1991 Measurement Science Conference
Year Published: 1991
Abstract: A method has been developed to improve the accuracy of measurements of electrical conductivity by the eddy-current technique. Such measurements are used to determine the conductivity values of non-ferrous metals. High accuracy is especially important for calibrating the standard conductivity coupons which are used to standardize portable conductivity meters. The coupons are calibrated by comparison with primary standard conductivity bars using an inductive probe and the eddy-current technique. Spacing between the probe and coupon (lift-off) is a major source of error. A method has been developed to reduce this error to about ?0.02% of conductivity value.

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