M Brizard et al 2005 Metrologia 42 298 doi:10.1088/0026-1394/42/4/015
M Brizard1, M Megharfi1 and C Verdier2
Show affiliationsTo reduce the uncertainties in measurements obtained by means of capillary viscometers, we developed an absolute falling-ball viscometer. The metrological characterization of this experimental bench is presented for a mineral oil with a viscosity of 30 Pa s by means of two distinct methods described in the GUM (Guide to the Expression of Uncertainty in Measurement). First, the calculation is performed using the law of propagation of uncertainties. Then, because of the increasing use of the techniques of propagation of distributions in metrology, we calculated the measurement uncertainties by a numerical Monte Carlo simulation. Both results were then compared for a confidence interval of 95%. Finally, the viscosity measurements and uncertainties obtained by the falling-ball viscometer were compared against those obtained by a capillary viscometer.
06.30.-k Measurements common to several branches of physics and astronomy
Issue 4 (August 2005)
Received 16 February 2005
Published 24 June 2005
M Brizard et al 2005 Metrologia 42 298
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