Abstract
The design and performance of an automatic, four-terminal resistance bridge for low temperature resistance thermometry are described. An overall accuracy of 0.5% and a resolution of 1 part in 1000 are achieved with a 10-12 W sensor dissipation. Continuous analogue balancing is employed to yield a maximum response time of 7 s for a step change of one decade in the resistance. Experiments on three different developmental self-balancing bridges are also discussed.
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