A platinum resistance thermometer calibration laboratory is described that provides ten of the defining fixed points of the new International Temperature Scale of 1990 (ITS-90)~(1), from the argon triple point up to the gold freezing point. Data are taken by computer using the IEEE-488 bus to access resistance bridges, digital multimeters, and scanners for thermometer selection and measurement. Details include laboratory layout, furnace controls and performance, measuring instruments, and a description of the software.
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