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Metrology

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Displaying 51 - 75 of 175

Basic Metrology for 2020

April 30, 2020

Author(s)

Stephan Schlamminger, Richard Davis

2019 was a big year for Metrology. The international system of units was revised on World Metrology Day, May 20th, that year [1]. What will 2020 bring? In this article we discuss five promising advances that we have on a watchlist for 2020. First, we

SI Base Units Relationships Poster

March 3, 2020

Author(s)

Eite Tiesinga, Kristen A. Dill, David B. Newell

This publication is a colorful poster illustrating the relationships of the International System of Units (SI) derived units with special names and symbols and the seven traditional base units. The diagram is aligned with the BIPM SI Brochure, 9th edition

Checking the Net Contents of Packaged Goods (as adopted by the 104th National Conference on Weights and Measures 2019)

November 25, 2019

Author(s)

Breyanna M. Blackwell

This handbook has been prepared as a procedural guide for the compliance testing of net content statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance of the- results of the packaging, distribution, and

Uniform Laws and Regulations in the Areas of Legal Metrology and Fuel Quality (as adopted by the 104th National Conference on Weights and Measures 2019)

November 25, 2019

Author(s)

Breyanna M. Blackwell

This handbook compiles the latest Uniform Laws and Regulations and related interpretations and guidelines adopted by the National Conference on Weights and Measures, Inc. (NCWM). At the 1983 Annual Meeting, the NCWM voted to change the title of Handbook

Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

October 31, 2019

Author(s)

Breyanna M. Blackwell

NIST Handbook 44 was first published in 1949, having been preceded by similar handbooks of various designations and in several forms, beginning in 1918. NIST Handbook 44 is published in its entirety each year following the Annual Meeting of the National

The International System of Units (SI), 2019 Edition

August 20, 2019

Author(s)

David Newell, Eite Tiesinga

The definitive international reference on the International System of Units (SI) is a booklet published by the International Bureau of Weights and Measures (BIPM) and often referred to as the BIPM SI Brochure. Entitled Le Systeme International d' Unites

Automated Substitution Weighing Apparatus for Liquid Volume Measurement

June 26, 2019

Author(s)

John D. Wright, Sherry D. Sheckels, Joey T. Boyd

The custody transfer of petroleum worth $1 × 10 12 / year is traced to the volume delivered from provers and liquid test measures. Mistakes as small as 0.02 % in a custody meter calibration can lead to multi-million dollar corrections in bills. NIST

Calibration Procedures for Weights and Measures Laboratories

May 29, 2019

Author(s)

Georgia L. Harris

This publication contains standard operating procedures for calibrations that were not previously published in other NIST Office of Weights and Measures publications and are included here in support of weights and measures laboratory program requirements

NIST Handbook 105-8, Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures, Specifications and Tolerances for Field Standard Weight Carts (2019 Ed)

May 20, 2019

Author(s)

Val R. Miller

These specifications and tolerances are recommended as minimum requirements for standards used by state and local weights and measures officials and others in verification of large capacity scales used in quantity determination of commodities by means of

Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures, Specifications and Tolerances for Field Standard Weights (2019 Ed)

May 20, 2019

Author(s)

Val R. Miller

These specifications and tolerances establish the minimum requirements for Field Standards used by State and local weights and measures officials and others in the regulatory verification of weighing devices used in quantity determination of commodities

NISTIR 7383, Selected Procedures for Volumetric Calibrations (2019 Ed)

May 14, 2019

Author(s)

Georgia L. Harris, Val R. Miller

This publication contains Good Measurement Procedures (GMP), Good Laboratory Procedures (GLP), and Standard Operating Procedures (SOP) for use in calibration laboratories performing volumetric calibrations. It includes procedures for Volume Transfer and

NIST HB 143 - State Weights and Measures Laboratories Program Handbook, 6th Edition

May 7, 2019

Author(s)

Elizabeth J. Benham

This handbook provides the National Institute of Standards and Technology (NIST) Office of Weights and Measures (OWM) performance standards and formalized procedures for the voluntary recognition of State legal metrology laboratories. This 2018 edition

NISTIR 5672, Advanced Mass Calibration and Measurement Assurance Program for State Calibration Laboratories (2019 Ed)

May 7, 2019

Author(s)

Georgia L. Harris, Kenneth L. Fraley

This publication provides guidelines for evaluating data from advanced mass calibrations and for establishing measurement assurance programs in precision mass calibration laboratories. The NIST Office of Weights and Measures (OWM) uses these guidelines