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Metrology

Weights & Measures

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Displaying 101 - 125 of 175

Contributions of precision engineering to the revision of the SI

November 28, 2017
Author(s)
Stephan Schlamminger, Harald Bosse, Horst Kunzmann, Jon R. Pratt, Ian Robinson, Michael de Podesta, Paul Shore, Paul Morantz
All measurements performed in science and industry are based on the International System of Units, the SI. It has been proposed to revise the SI following an approach which had already been implemented for the redefinition of the unit of length, the metre

Checking the Net Contents of Packaged Goods (NIST HB 133 - 2018 ed)

November 17, 2017
Author(s)
Linda D. Crown, Lisa Warfield, David A. Sefcik
This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of packaging, distribution, and sale of

SI Measurement System Chart

August 24, 2017
Author(s)
Elizabeth J. Benham
This publication is a colorful chart explaining the 7 base units of the SI (International System of Units) and prefix symbols, featuring the Measurement League: Guardians of the SI. The Measurement League are superheroes dedicated to the fight against

Measurement of the Planck constant at the National Institute of Standards and Technology from 2015 to 2017

July 28, 2017
Author(s)
Darine El Haddad, Frank Seifert, Leon Chao, Antonio Possolo, David B. Newell, Jon R. Pratt, Carl J. Williams, Stephan Schlamminger
Researchers at the National Institute of Standards and Technology(NIST) estimate the value of the Planck constant as h = 6.62606994(10) x 10^-34 Js, hence with relative standard uncertainty 15.3 x 10^-9. This measurement result is based on over 17,000

Report of the 101st National Conference on Weights and Measures (2016)

June 29, 2017
Author(s)
Tina G. Butcher, Linda D. Crown, Richard A. Harshman, David Sefcik, Lisa Warfield
The 101st Annual Meeting of the National of the National Conference on Weights and Measures (NCWM) was held July 24-28, 2016, at the Grand Hyatt Denver Hotel, Denver, Colorado. The theme of the meeting was "NCWM - Strengthening a Progressive Organization."

Sizing up the Quantum

June 2, 2017
Author(s)
Stephan Schlamminger
No abstract. This is a column in Nature science.

Selected Procedures for Volumetric Calibrations (2017 Ed)

March 28, 2017
Author(s)
Val R. Miller, Georgia L. Harris
This publication contains Good Measurement Procedures (GMP), Good Laboratory Procedures (GLP), and Standard Operating Procedures (SOP) for use in calibration laboratories performing volumetric calibrations. This edition is updated from the 2013 version