The Third Periodic Verification of National Prototypes of the Kilogram (1988–1992)¶
Girard, G. (1992). The Third Periodic Verification of National Prototypes of the Kilogram (1988–1992). Metrologia, 31(4), 317-336.
Cited by¶
1 citation across 1 artifact.
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Primes¶
- Reference Standard Decay
- The reference revision clock and the role-asymmetry are exactly what metrologists discovered and could not initially see from inside: the IPK and its official copies drifted relative to one another by tens of micrograms over a century (surface contamination, material loss), which means the kilogram itself was changing while every apparatus faithfully scored mass "in kilograms" as though nothing had moved
This sourceInter-comparisons revealing that the IPK and its official copies drifted by tens of micrograms relative to one another over a century.
- The reference revision clock and the role-asymmetry are exactly what metrologists discovered and could not initially see from inside: the IPK and its official copies drifted relative to one another by tens of micrograms over a century (surface contamination, material loss), which means the kilogram itself was changing while every apparatus faithfully scored mass "in kilograms" as though nothing had moved
Verification¶
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Registry ID ref:46de3947050f · see in the full table