The Third Periodic Verification of National Prototypes of the Kilogram (1988-1992)
@article{Girard1994TheTP,
title={The Third Periodic Verification of National Prototypes of the Kilogram (1988-1992)},
author={G Girard},
journal={Metrologia},
year={1994},
volume={31},
pages={317 - 336}
}Foreword The manufacture of the national prototypes of the kilogram and their two previous verifications were the subject of detailed reports published in Travaux et Me'moires du Bureau International des Poids et Mesures. These reports have proven to be extremely valuable, given the importance of the national prototypes in linking countries to the international prototype of the kilogram and thereby to the unit of mass in the Systkme International. The behaviour of platinum-iridium prototypes…
52 Citations
The Dissemination of Mass in the United States: Results and Implications of Recent BIPM Calibrations of US National Prototype Kilograms
- ChemistryJournal of research of the National Institute of Standards and Technology
- 2014
The following is a brief description of the roles of the national prototype kilograms in the dissemination of mass in the United States of America, and the implications for NIST mass calibration customers of the most recent recalibrations of K20 and K4.
Calibration campaign against the international prototype of the kilogram in anticipation of the redefinition of the kilogram, part II: evolution of the BIPM as-maintained mass unit from the 3rd periodic verification to 2014
- Physics
- 2016
In 2014 the Bureau International des Poids et Mesures (BIPM) carried out a calibration campaign using the international prototype of the kilogram (IPK). This is the second part in a series of…
Calibration campaign against the international prototype of the kilogram in anticipation of the redefinition of the kilogram part I: comparison of the international prototype with its official copies
- Medicine
- 2015
The results do not confirm the trend for the masses of the six official copies to diverge from the mass of the IPK that was observed during the 2nd and 3rd Periodic Verifications, but the mass comparisons showed a very good repeatability.
The Revision of the SI – Towards an International System of Units Based on Defining Constants
- PhysicsMeasurement Techniques
- 2018
Following many years of intense investigations, leading to significant progress with the determination of fundamental constants, it is now likely that the General Conference for Weights and Measures…
The revision of the SI—the result of three decades of progress in metrology
- MedicineMetrologia
- 2019
The new definitions of the base units used to create the rules of measurement and tie measurements at the atomic and quantum scales to those at the macroscopic level will allow the development of new and more accurate measurement techniques.
The Kilogram and Measurements of Mass and Force
- PhysicsJournal of research of the National Institute of Standards and Technology
- 2001
The facilities, measurement capabilities, and ongoing research activities in the areas of mass and force at the National Institute of Standards and Technology (NIST) are described.
Establishment of the platinum–iridium kilogram mass standards at NMIJ after the Extraordinary Calibrations
- Physics
- 2016
The Bureau International des Poids et Mesures has carried out calibrations of the platinum–iridium kilogram mass standards by referencing the international prototype of the kilogram for the first…
Monitoring of the Drift of the Pt–Ir Kilogram Prototypes of KRISS, Traceable to BIPM As-Maintained Mass Unit
- Environmental ScienceMAPAN
- 2018
The Bureau International des Poids et Mesures (BIPM) announced recently that its as-maintained mass unit had been changed as the result of Extraordinary Calibration. Following that amendment, the…
Considerations on future redefinitions of the kilogram, the mole and of other units
- Physics
- 2006
The definitions of some units of the Système International are likely to be revised as early as 2011 by basing them on fixed values of fundamental constants of nature, provided experimental…
The New Kilogram Definition and its Implications for High-Precision Mass Tolerance Classes
- PhysicsJournal of research of the National Institute of Standards and Technology
- 2013
This paper will compare the legal metrology requirements for precision mass calibration laboratories after the kilogram is redefined with the current capabilities based on the international prototype kilogram (IPK) realization.
6 References
Platinum Metals Review
- ChemistryNature
- 1957
The Use of Platinum in High Power Thermionic Valves Exothermic Fuse Wire Corrosion Control by Anodic Protection Properties of Platinum Metals and Alloys Surface Area of Platinum Catalysts Ruthenium,…
IUPAC Commission 1.4, Recommendation for Redetermination of the Absolute Density of Water
- Pure Appl. Chem
- 1907
, Microtecnic , 1952 , VI , 204 - 206 . 15 BIPM Travaux et Mimoires , 1907 , 13 , 16 . IUPAC Commission 1 . 4 , Recommendation for Redeter - mination of the Absolute Density of Water
- Br . J . Appl . Phys .
- 1976
The washing and cleaning of kilogram 5
- 1989
BIPM Travaux et Mimoires , 1890 , 7 , 1 - 9 ; Thiesen M
- 1986
In Precision Measurements and Fundamental Constants 11 , NBS Spec
- 1983