Using a Mini Triple Point of Water System to Improve Reliability in a Temperature Calibration Laboratory

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Using a Mini Triple Point of Water System to Improve Reliability in a Temperature Calibration Laboratory (177.86 KB)

A mini TPW system was introduced as an excellent way to measure the errors in the calibration system of a secondary level temperature laboratory. In this paper, the structure and operation of this system is briefly introduced. Also, its performance is discussed. The mini TPW system was directly compared to a traditional TPW cell. The difference between the mini TPW system and the traditional TPW cell was found to be less than 0.3 mK using an SPRT. The expanded (k=2) uncertainty of the mini TPW system is better than 0.5 mK. Several thermometers with different structures were tested in the system. Errors seen with the different thermometers between the mini TPW system and the traditional TPW system are reported.