The International System of Units, Traceability, and Calibration

Stephen Crowder, Collin Delker, Eric Forrest and Nevin Martin ()
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Stephen Crowder: Sandia National Laboratories
Collin Delker: Sandia National Laboratories
Eric Forrest: Sandia National Laboratories
Nevin Martin: Sandia National Laboratories

Chapter Chapter 3 in Introduction to Statistics in Metrology, 2020, pp 41-58 from Springer

Abstract: Abstract Consistent and well-defined units, much like terminology, are critical in the comparison of measurement results and to the understanding of measurement uncertainty. This chapter provides a history of the International System of Units, or “SI,” and a modern description of its seven base units utilized throughout the majority of the world. These units include the second, the meter, the kilogram, the ampere, the kelvin, the mole, and the candela. Recent advancements in unit definitions are discussed, with an emphasis on redefinition using fundamental constants to achieve lower uncertainties. This chapter also describes calibration and traceability, important metrological concepts, along with calibration policies and standards.

Date: 2020
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DOI: 10.1007/978-3-030-53329-8_3

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