To evaluate the available experimental results from the watt balance and Avogadro experiments with a special emphasis on the necessary vacuum mass metrology;
To identify requirements on mass metrology for a practical realization of a new definition;
To organize internation comparisons and evaluation of the results; and
In coordination with TG 2, to identify and evaluate the uncertainty inherent in the mise en pratique for the kilogram when a new definition is proposed to the CGPM.
To report to the WGM and the CCM on the following:
The present uncertainty to which the unit of mass can be disseminated from the international to the national prototypes;
Methods for evaluating the correlation between the measured mass values of the prototypes of the kilogram;
Recommandations for additionnal measurements which would allow an improved uncertainty evalutation. These measurements may involve use of the international prototype or its official copies; and
In coordination with TG1, identification and evaluation of the uncertainty components inherent in the mise en pratique for the kilogram when a new definition is proposed to the CGPM.
CCM summary
To study, develop and advise the CCM on issues related to mass standards;
