★It is made of relevant standards-ASTM D1200-2010《 Standard Test Method for Viscosity by Ford Viscosity Cup》
★The correction coefficient value “K” is the time after the filling of the viscosity cup with the secondary standard oil under the set temperature conditions (such as 20 °C ± 0.1 °C), the flow time should be in the range of 30s ~ 100s, the K value should be 1 ± Within 0.03 range. The viscometer should be periodically calibrated to the extent of its frequency of use.
★4 Viscosity Cup belongs to laboratory, workshop, control and test instruments. The measured viscosity is conditional viscosity. Namely: a certain amount of sample, at a certain temperature, from the prescribed diameter of the hole flow out of time.