[Archives] Instrumentation Et Méthodes De Mesure 2002
DOI: 10.51257/a-v2-r60
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Organisation de la métrologie en France. Le BNM

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“…The major inconveniences of this method are the increase in the uncertainty at each 'step-up' [1] during the process and the fact that it is based on the viscosity of water at 20 ˚C, which itself is a value subject to uncertainties [2,3]. This is why we developed an absolute falling-ball viscometer that allows one to keep a low uncertainty while covering a large viscosity range (0.1 Pa s to 100 Pa s using balls different in size and density) and also ensures traceability to the base units of the International System [4].…”
Section: Introductionmentioning
confidence: 99%
“…The major inconveniences of this method are the increase in the uncertainty at each 'step-up' [1] during the process and the fact that it is based on the viscosity of water at 20 ˚C, which itself is a value subject to uncertainties [2,3]. This is why we developed an absolute falling-ball viscometer that allows one to keep a low uncertainty while covering a large viscosity range (0.1 Pa s to 100 Pa s using balls different in size and density) and also ensures traceability to the base units of the International System [4].…”
Section: Introductionmentioning
confidence: 99%