APPARENT VISCOSITY BY CAPILLARY VISCOMETER AT HIGH TEMPERATURE HIGH SHEAR: D4741
TEST SUMMARY
This test method covers the laboratory determination of the viscosity of oils at 150° C and 1 x 10(6) s(-1) using Ravenfield high shear rate tapered-plug viscometer models BE or BS. This test method may readily be adapted to other conditions if required.
Newtonian calibration oils are used to adjust the working gap and for calibration of the apparatus. These calibration oils cover a range from approximately 1.8 to 5.9 cP mPa• s at 150° C. This test method should not be used for extrapolation to higher viscosities than those of the Newtonian calibration oils used for calibration of the apparatus.
