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Metrology

Weights & Measures

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Displaying 76 - 100 of 175

Frequently Asked Questions About Commercial Hydrogen Vehicle Refueling

December 28, 2018
Author(s)
Juana S. Williams
"Commonly asked questions about hydrogen fuel cell electric vehicles (HFCEV) and hydrogen fuel availability, technology, safety; and the legal metrology requirements and terminology applicable to hydrogen fuel quality, measuring equipment, method of sale

Checking the Net Contents of Packaged Goods (NIST HB 133 - 2019 ed)

November 30, 2018
Author(s)
Linda D. Crown, David A. Sefcik, Lisa Warfield
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

Measurement units as quantities of objects or values of quantities: a discussion

August 24, 2018
Author(s)
Charles D. Ehrlich, Leslie R. Pendrill, Luca Mari
Measurement units have historically been defined as quantities (specific properties) of objects, such as the mass of a particular piece of metal or the length of a particular rod. While the current SI Brochure endorses this position, the draft 9th SI

Report of the 102nd National Conference on Weights and Measures (2017)

July 11, 2018
Author(s)
Tina G. Butcher, Linda D. Crown, Richard A. Harshman, David A. Sefcik, Lisa Warfield
The 102nd Annual Meeting of the National of the National Conference on Weights and Measures (NCWM) was held July 16-20, 2017, at the Omni William Penn Hotel, Pittsburgh, Pennsylvania. The theme of the meeting was "Tradition and Technology: Finding the

The Permeability of Vacuum and the Revised International System of Units

December 29, 2017
Author(s)
Ronald B. Goldfarb
The International System of Units (SI) is expected to be revised such that all seven base units, including the kilogram, will be defined in terms of fixed numerical values of seven defining constants. The revised SI will include a redefinition of the