NDLI: Re-realization of the NIS National Viscosity Scale and Its Range Extension up to 250,142 mm$^{2}$/s

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Re-realization of the NIS National Viscosity Scale and Its Range Extension up to 250,142 mm$^{2}$/s

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Re-realization of the NIS National Viscosity Scale and Its Range Extension up to 250,142 mm$^{2}$/s

Content Provider	Springer Nature Link
Author	Mekawy, M. Din Mahmoud, Essam Mohy, E.
Copyright Year	2012
Abstract	A wide-range viscosity standard system has generally been realized with capillary viscometers, which are calibrated by the stepping-up method on the basis of viscosity value of distilled water at 20 °C. As per recommendation of Bureau International des Poids et Mesures (BIPM), the national primary viscosity scale must be realized every 10 years. The present work is an attempt to re-realize the existing scale and extend it to from 70,000 to 250,142 mm$^{2}$/s. This would enable NIS to calibrate different types of viscometers with the highest constant. The NIS viscosity scale was first realized in 2001 [1] using glass capillary viscometers in the range from 1 to 70,000 mm$^{2}$/s. From the present calibration results of the NIS viscometers, the present scale is realized with an uncertainty of about 0.07 % at low viscosities (0.9 mm$^{2}$/s) rising to about 0.25 % at higher viscosities (250,142 mm$^{2}$/s).
Starting Page	129
Ending Page	132
Page Count	4
File Format	PDF
ISSN	09703950
Journal	MAPAN
Volume Number	27
Issue Number	2
e-ISSN	09749853
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-20
Publisher Institution	Metrology Society of India
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	NIS viscosity scale Reference liquids Viscometers Measurement Science and Instrumentation Theoretical, Mathematical and Computational Physics Numerical and Computational Physics Mathematical Methods in Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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Re-realization of the NIS National Viscosity Scale and Its Range Extension up to 250,142 mm2/s

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