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TitleAutomation of the resistance bridge calibrator
Publication TypeConference Paper
Year of Publication2013
AuthorsWhite, D.R., Edgar H., McLennan B.E., and Saunders P.
Conference NameAIP Conference Proceedings
Date Published2013
AbstractThe design and performance of a four-resistor combinatorial network for the calibration of thermometry resistance bridges is described. The instrument is able to be immersed in an oil bath for temperature control and has a USB interface. A detailed uncertainty analysis including the effects of the combining network, the cross resistances of the four-terminal junction, electrical insulation resistances, and the stability of the base resistors with respect to both temperature and time, indicates a standard uncertainty due to the network effects alone of better than 200 n or 2 parts in 109 of 100 The performance of the new network has been confirmed with the calibration of a switched-dc bridge for which the standard deviation of residual errors due to both the network and the bridge, was 160 n. © 2013 AIP Publishing LLC.

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