An improved lead resistance compensation technique for use with three-wire resistance temperature detectors is presented. The present practice of using the three-wire concept in an unbalanced bridge to provide signal to direct reading instruments produces nearly 1% error for a lead resistance as low as 1 /spl Omega/. In contrast, the new method limits the error to below 0.1% with much higher lead wire resistances.
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Pradhan et al. (1999) studied this question.
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