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2 Scientific and technical:
- To conserve and disseminate the primary standard of
mass, the International Prototype of the kilogram.
- To establish and disseminate International Atomic
Time (TAI) and, in collaboration with the International Earth Rotation
Service, Coordinated Universal Time (UTC).
- To make its own realizations of other base and derived
units of the SI and, if necessary, other units that are not yet linked
to the SI.
- To participate in the development of primary methods
of measurement and procedures in chemical analysis and, where necessary,
to maintain its own standards in these fields.
- To undertake research focused on the development of
present and future measurement units and standards, including appropriate
fundamental research, studies of the conceptual basis of primary standards
and units and determination of physical constants.
The interior of the Satorius balance:
showing 1 kg silicon spheres and 1 kg traditional mass artefacts
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An array of Josephson junctions -
a quantum electrical standard
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3 Specific technical services in support of National
Metrology Institutes (NMIs):
- To carry out international comparisons of practical
realizations of certain base and derived units of the SI, as may be
necessary to meet the needs of the NMIs.
- To provide a specialized calibration service for NMIs
for selected national measurement standards whenever this is desirable
and feasible.
- To provide opportunities for technology transfer during
calibrations and comparisons organized by the BIPM.
International Reference System for
gamma emitting radionuclides
(Full details about the scientific work of the BIPM may
be found under the various headings at www.bipm.org/en/scientific/)
4 International coordination of metrology:
- To provide support for the operation of the CIPM Mutual
Recognition Arrangement (CIPM MRA) of national measurement standards
and of calibration and measurement certificates issued by NMIs through
the operation of the BIPM key comparison database, the management of
the Joint Committee of the Regional Metrology Organizations and the
BIPM (JCRB), and through participation in meetings of Consultative Committees
and appropriate meetings of the RMOs and through the publication of
the results of key and supplementary comparisons.
- To provide the scientific and administrative Secretariat
for the General Conference on Weights and Measures, the CIPM and its
Consultative Committees as well as the secretariat for meetings of Directors
of NMIs and the various Joint Committees.
(Full details about the CIPM Mutual Recognition Arrangement
may be found at www.bipm.org/en/cipm-mra/)
5 Relations with other organizations:
- To enter into agreements with intergovernmental and
international organizations where such agreements would help in the
coordination of the work of these organizations with that of the BIPM
or the CIPM, and where it may stimulate corresponding coordination at
the national or regional level.
(For further details about the work of the BIPM with
international organizations, please see www.bipm.org/convention/)
6 Information and publicity:
- To promote as widely as possible using all appropriate
methods, the activities carried out under the Metre Convention,
- To provide through the BIPM website, a centre for information
on matters related to the Metre Convention, the CIPM, its Consultative
Committees, Joint Committees, the CIPM MRA, including the BIPM key comparison
database, and matters related to international metrology.
- To edit and arrange for the publication of Metrologia,
the international scientific journal of metrology.
(Full details about the publications of the BIPM may
be found at www.bipm.org/en/publications/)
Geographical distribution of the laboratories that contribute to the
international time scales realized and disseminated by the Time Frequency
and Gravimetry section of the BIPM
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