ASTM D7483-2013A (2017) Standard Test Method for Dynamic Viscosity and Derivative Kinematic Viscosity of Liquids by Oscillating Piston Viscosity meters specifies the test method for dynamic viscosity and kinematic viscosity measurement of liquids such as lubricating oils by oscillating piston Viscosity meters. Measurement ranges from 0.2 mPa · s to 20,000 mPa · s and Temperature ranges from -40 ° C to 190 ° C. The principle is to determine the dynamic viscosity by measuring the average travel time of the piston by electromagnetically driving the piston to oscillate in the liquid, and the kinematic viscosity is calculated by additional measurement of the piston up and down travel time ratio combined with the standard liquid calibrated Linear dispersion of known viscosity. This method has the characteristics of simple operation, high accuracy and wide application range, and is widely used in petroleum, chemical and mechanical lubrication fields.