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2005•IEEE Transactions on Instrumentation and MeasurementRequires access

The NIST Project for the Electronic Realization of the Kilogram

Reto Steiner, David B. Newell, Edwin R. Williams, R. Liu, P. Gournay

Open publisher page 13 citations

Abstract

The project Electronic Realization of the Kilogram has rebuilt the National Institute of Standards and Technology (NIST) watt balance, which has been fully operational for nine months. Short-term noise is at an all-time low with overnight runs exhibiting standard deviations of parts in 10/sup 8/. Recent improvements are discussed that have led to this enhanced performance, as are several significant error tests. Present watt results (i.e., Planck's constant) are now within 1 /spl mu/W/W of CODATA values, but error checking to report a more precise value has not been completed.

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The project Electronic Realization of the Kilogram has rebuilt the National Institute of Standards and Technology (NIST) watt balance, which has been fully operational for nine months. Short-term noise is at an all-time low with overnight runs exhibiting standard deviations of parts in 10/sup 8/. Recent improvements are discussed that have led to this enhanced performance, as are several significant error tests. Present watt results (i.e., Planck's constant) are now within 1 /spl mu/W/W of CODATA values, but error checking to report a more precise value has not been completed.

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Available abstract

The project Electronic Realization of the Kilogram has rebuilt the National Institute of Standards and Technology (NIST) watt balance, which has been fully operational for nine months. Short-term noise is at an all-time low with overnight runs exhibiting standard deviations of parts in 10/sup 8/. Recent improvements are discussed that have led to this enhanced performance, as are several significant error tests. Present watt results (i.e., Planck's constant) are now within 1 /spl mu/W/W of CODATA values, but error checking to report a more precise value has not been completed.

Key concepts: Kilogram, NIST, Watt, Planck constant, Realization (probability), Electrical engineering, Noise (video), Engineering

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