1.1 This test method covers the measurement of the yield stress and viscosity of engine oils after cooling at controlled rates over a period of 43 or 45 h to a final test temperature of -20 or -25°C. The precision is stated for test temperatures -25 and -20°C. The viscosity measurements are made at a shear stress of 525 Pa over a shear rate of 0.4 to 15 s-1. This test method is suitable for measurement of viscosities ranging from 4000 mPa·s to >400 000 mPa·s, and is suitable for yield stress measurements of 7 Pa to >350 Pa.
Product Details
- Published:
- 11/01/2012
- Number of Pages:
- 9
- File Size:
- 1 file , 120 KB
- Redline File Size:
- 2 files , 230 KB
