![]() ![]() Next, pinching the knee 2 with your finger and turning the viscometer, lower the knee 1 into the vessel with oil and suck the oil or oil product with a rubber bulb, water jet pump or otherwise to the mark M2, making sure that the sample does not form air bubbles. To do this, put a rubber tube on the discharge tube 3. 1).Ī clean dry viscometer is filled with petroleum product. In laboratory practice, the most common are Pinkevych viscometers type VPZHT-4 and VPZHT-2 (Fig. A viscometer with such a capillary diameter is selected for analysis so that the oil leakage time is not less than 200 s. ![]() The test is performed at a temperature of 20 ° C. Purpose: to determine the kinematic viscosity of the oilĭetermining the viscosity of oil or petroleum products in a capillary viscometer is to measure the leakage time of a certain volume of the tested petroleum product under the influence of gravity.
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