CCM.M-K8.2019
MEASURAND Realization of the kilogram
NOMINAL VALUE 1 kg
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg.
The CCM has decided that, until the dispersion between enough results of individual realizations of the kilogram becomes compatible with the individual realization uncertainties, NMIs should base their dissemination on an agreed “consensus value”. The details of this international coordination of the kilogram dissemination are described in the “CCM detailed note on the dissemination process after the redefinition of the kilogram”, available from the BIPM web site.
CCM.M-K8.2019
MEASURAND Realization of the kilogram
NOMINAL VALUE 1 kg
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mg |
mg |
mg |
||
| BIPM | 0.025 | 0.097 | ||
| KRISS | 0.072 | 0.214 | ||
| NIM | -0.012 | 0.090 | ||
| NIST | 0.000 | 0.052 | ||
| NMIJ | 0.002 | 0.040 | ||
| NRC | 0.015 | 0.018 | ||
| PTB | -0.021 | 0.021 |
The CCM has decided that, until the dispersion between enough results of individual realizations of the kilogram becomes compatible with the individual realization uncertainties, NMIs should base their dissemination on an agreed “consensus value”. The details of this international coordination of the kilogram dissemination are described in the “CCM detailed note on the dissemination process after the redefinition of the kilogram”, available from the BIPM web site.
| Metrology area, Sub-field | Mass and related quantities, Mass Standards |
| Description | Realization of the kilogram |
| Time of measurements | 2019 - 2020 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Mass of 1 kg |
| Parameters | Measurement under vacuum |
| Transfer device | 1 kg mass standards |
| Comparison type | Key Comparison |
| Consultative Committee | CCM (Consultative Committee for Mass and Related Quantities) |
| Conducted by | CCM (Consultative Committee for Mass and Related Quantities) |
| Comments | Result published on 30 October 2020 |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | M. Stock +33 (0) 1 45 07 70 24 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NRC |
National Research Council, Canada, SIM |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
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CCM.M-K8.2019
MEASURAND Realization of the kilogram
NOMINAL VALUE 1 kg
The key comparison reference value xR is calculated as the weighted mean of the participants' results. It deviates by -0.0188 mg with respect to the mass unit maintained by the BIPM working standards, traceable to the International Prototype of the Kilogram.
The associated standard uncertainty uR (xR ) = 0.0075 mg .
CCM.M-K8.2019
MEASURAND Realization of the kilogram
NOMINAL VALUE 1 kg
Information on measurement data are given in the CCM.M-K8.2019 Final Report.
