Abstract
Step up procedure, starting with primary standard (water), for establishing kinematic viscosity scale in terms of standard viscometers and oils has been explained in detail. Measurement system of viscosity at three levels has been discussed. Details of master capillary viscometers of different viscometer constants are prescribed. Uncertainty of measurement and its propagation from one step to another has been discussed. Standard uncertainty of the viscosity of oil and viscometer constant used in the nth step of the step up procedure has been derived.
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References
ISO (1998) Viscosity of water ISO/TR 3666. International organisation for Standardisation, Geneva
ASTM (2006) Standard Practice for Basic Calibration of Master Viscometers and Viscosity Oil Standards ASTM D2162-06
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Fujita Y, Kurano Y, Fujii K (2009) Evaluation of uncertainty in viscosity measurements by capillary viscometers. Metrologia 46:237–248
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Gupta, S.V. (2014). Kinematic Viscosity Scale and Uncertainty. In: Viscometry for Liquids. Springer Series in Materials Science, vol 194. Springer, Cham. https://doi.org/10.1007/978-3-319-04858-1_2
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DOI: https://doi.org/10.1007/978-3-319-04858-1_2
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