Viscosity of an oil is defined as its resistance to flow and Viscometer measures the flow. Monitoring viscosity is one of the most important components of any oil analysis program. Minute changes in viscosity at operating temperatures can be magnified to the extent that an oil is no longer able to provide adequate lubrication and efficiency in preventing friction between moving parts. - Automatically calculate calibration error of standard oil. Viscosity measuring range:1500-25000cp. Check the accuracy of data for users. Can edit dozens of standard oil.