Alignment uncertainties of the NIST watt experiment

被引：47

作者：

Gillespie, AD

Fujii, K

Newell, DB

Olsen, PT

Picard, A

Steiner, RL

Stenbakken, GN

Williams, ER

机构：

[1] Electronics and Electrical Engineering Laboratory, National Institute of Standards and Technology, U.S. Department of Commerce, Gaithersburg

[2] National Institute of Standards and Technology, Paris

[3] National Laboratory of Metrology

[4] Bureau International Des Poids et Measures, Paris

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1997年 / 46卷 / 02期

关键词：

D O I：

10.1109/19.571933

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The effects of alignment uncertainties of the NIST watt balance with respect to local gravity and the magnetic flux density of the balance have been analyzed. Techniques for measuring all quantities relevant to misalignment have been developed. The components of the relative combined standard uncertainty of the measured value of the watt due to alignment uncertainties have been reduced to 20 nW/W, and potential improvements in the balance design have been identified which could ultimately lead to a reduction of that uncertainty to below 10 nW/W.

引用

页码：605 / 608

页数：4

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