 |
International
aspects of the SI
CIPM Consultative Committees
| CCEM |
Comité
Consultatif d'Électricité et Magnétisme (CCEM),
new name given in 1997 to the Comité Consultatif d'Électricité
(CCE) established in 1927.
The
Consultative Committee for Electricity and Magnetism is concerned with
practical realizations of the Sl volt, ohm, ampere, and watt, laboratory
reference standards of the volt and the ohm based upon the Josephson and
quantum Hall effects, capacitance standards, ac/dc measurements, and RF
and microwave standards. |
| CCPR |
Comité
Consultatif de Photométrie et Radiométrie (CCPR), new
name given in 1971 to the Comité Consultatif de Photométrie
(CCP) established in 1933 (between 1930 and 1933 the CCE dealt with matters
concerning photometry).
The
Consultative Committee for Photometry and Radiometry is concerned with
photometric and radiometric scales, development of absolute radiometry,
and radiometry for fibre optics (with the CCEM). |
| CCT |
Comité
Consultatif de Thermométrie (CCT) established in 1937.
The
Consultative Committee for Thermometry is concerned with the establishment
and realization of the International Temperature Scale of 1990 (ITS-90),
differences between T90 and thermodynamic temperature,
extension and improvement of the ITS-90, secondary reference points, international
reference tables for thermocouples, and resistance thermometers. |
| CCL |
Comité
Consultatif des Longueurs (CCL), new name given in 1997 to the Comité
Consultatif pour la Définition du Mètre (CCDM) established
in 1952.
The
Consultative Committee for Length is concerned with the definition
and realization of the meter, and practical length and angle measurements. |
| CCTF |
Comité
Consultatif du Temps et des Fréquences (CCTF), new name given
in 1997 to the Comité Consultatif pour la Definition de la Seconde
(CCDS) established in 1956.
The
Consultative Committee for Time and Frequency is concerned with the
definition and realization of the second, and the establishment and diffusion
of International Atomic Time (TAI) and Coordinated Universal Time (UTC). |
| CCRI |
Comité
Consultatif des Rayonnements Ionisants (CCRI), new name given in 1997
to the Comité Consultatif pour les Étalons de Mesure des
Rayonnements lonisants (CCEMRI) established in 1958.
The
Consultative Committee for Ionizing Radiations is concerned with definitions
of quantities and units, standards for x-ray, gamma-ray and neutron dosimetry,
radioactivity measurement, and the international reference system for radionuclides
(SIR). |
| CCU |
Comité
Consultatif des Unités (CCU) established in 1964 (this committee
replaced the Commission for the System of Units established by the CIPM
in 1954).
The
Consultative Committee for Units is concerned with the development
of the Système International d'Unités (Sl), and the preparation
of successive editions of the BIPM Sl Brochure. |
| CCM |
Comité
Consultatif pour la Masse et les grandeurs apparentées (CCM) established
in 1980.
The
Consultative Committee for Mass and Related Quantities is concerned
with comparisons of mass standards with the international prototype of
the kilogram, considerations affecting the definition of the unit of mass,
and also density, pressure, and force standards. |
| CCQM |
Comité Consultatif pour la Quantité de
Matière (CCQM) established in 1993.
The Consultative Committee for Amount of Substance is concerned with
primary methods for measuring amount of substance, related international
comparisons, and the establishment of international traceability between
national laboratories concerned with metrology in chemistry. |
| CCAUV |
Comité Consultatif de l'Acoustique, des Ultrasons et des Vibrations
(CCAUV) established in 1998.
The Consultative Committee for Acoustics, Ultrasound and Vibration is
concerned with the organization of key comparisons in acoustics (airborne and
underwater), in ultrasound measurement, and in vibration measurement; it acts
as the focus for this diverse community, seeking to develop common aims and
increased collaboration between national metrology institutes and appropriate
designated organizatjions in Member Countries of the Meter Convention. |
Return
to International aspects of the SI |
