Static phase improvements in the LNE watt balance.
This paper describes the mechanical and electrical modifications carried out on the LNE watt balance to reduce the noise level associated with the static phase. The mechanical improvements concern the home-made balance beam using flexure hinges as pivots of the force comparator. The electrical improvements involve the source used to servo-control the equilibrium position of the beam during the static phase. All these modifications have led to a significant improvement of the repeatability and reproducibility of the results of static phase measurements.
Conservatoire National des Arts et Métiers (CNAM), 75141 Paris, France.
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Pinot
Laboratoire National de Métrologie et d'Essais (LNE), 78197 Trappes, France.
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Espel
Conservatoire National des Arts et Métiers (CNAM), 75141 Paris, France.
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Liu
Laboratoire National de Métrologie et d'Essais (LNE), 78197 Trappes, France.
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Thomas
Laboratoire National de Métrologie et d'Essais (LNE), 78197 Trappes, France.
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Ziane
Laboratoire National de Métrologie et d'Essais (LNE), 78197 Trappes, France.
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Palacios-Restrepo
Laboratoire National de Métrologie et d'Essais (LNE), 78197 Trappes, France.
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Piquemal