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Calibration of Resistance-Ratio Thermometry Bridges Using an Automated Resistance Bridge Calibrator

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Abstract

Ten resistance-ratio bridges used in thermometry were calibrated using an automated resistance bridge calibrator (RBC). For the best performing bridge, standard deviation s of the error of the resistance-ratio reading was 1.3 × 10−8 without correction, while s of the residuals from the correction was 9 × 10−9 when a correction function was applied. The assessed bridges were confirmed to perform within the accuracy that the manufacturers had specified. We also traced resistance stability in the RBC. By exploiting this stability, the RBC can be used as a set of transfer resistance standards for calibrating bridges with moderate accuracy. A direct comparison between a bridge with an expected accuracy of ~ 10−6 and a bridge with higher accuracy using the RBC was demonstrated.

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Acknowledgements

This research was supported by ‘Research on Measurement Standards for Redefinition of SI Units’ funded by the Korea Research Institute of Standards and Science (KRISS-2021-GP2021-0001).

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  1. Thermometry and Fluid Flow Metrology Group, Division of Physical Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea

    Dongjin Jang & Inseok Yang

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  1. Dongjin Jang
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  2. Inseok Yang
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Correspondence to Inseok Yang.

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Jang, D., Yang, I. Calibration of Resistance-Ratio Thermometry Bridges Using an Automated Resistance Bridge Calibrator. MAPAN 37, 33–40 (2022). https://doi.org/10.1007/s12647-021-00516-3

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  • DOI: https://doi.org/10.1007/s12647-021-00516-3

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