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A simple resistance network for calibrating resistance bridges

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4 Author(s)
D. R. White ; Meas. Standards Lab., New Zealand Inst. for Ind. Res. & Dev., New Zealand ; K. Jones ; J. M. Williams ; I. E. Ramsey

This paper describes a simple, passive, low-cost resistance network, closely related to Hamon build-up resistors, that enables the calibration of dc and low-frequency ac resistance and conductance bridges. The network is configured so that the four component resistors can be connected to realize 35 distinct four-terminal resistances, all interrelated by the usual formulas for the series and parallel connections of resistors. Theoretical analysis and experimental results show that with due care in the design, the network can be readily constructed to achieve an accuracy of better than 1 μΩ for resistances of the order of 100 Ω (1:108) for angular frequencies from dc to 104 rad/s

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:46 ,  Issue: 5 )