ASTM-D5481 › Historical Revision Information
Standard Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary Viscometer
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Scope
1.1 This test method covers the laboratory determination of high-temperature high-shear (HTHS) viscosity of engine oils at a temperature of 150°C using a multicell capillary viscometer containing pressure, temperature, and timing instrumentation. The shear rate for this test method corresponds to an apparent shear rate at the wall of 1.4 million reciprocal seconds (1.4 10 6 s1). This shear rate has been found to decrease the discrepancy between this test method and other high-temperature high-shear test methods3 used for engine oil specifications. Viscosities are determined directly from calibrations that have been established with Newtonian oils with viscosities from 2 to 5 mPa·s at 150°C.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
capillary method; shear testing-petroleum products; viscosity; viscosity-apparent
To find similar documents by ASTM Volume:
05.02 (Petroleum Products and Lubricants (II): D3711 - D6122)
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Document Number
ASTM-D5481-96
Revision Level
1996 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
April 10, 1996
Document Type
Test Method
Page Count
5 pages
Committee Number
D02.07