![]() The Kinematic viscosity of an oil is determined by testing an oil sample in a kinematic viscometer at a set temperature. Since so many events can affect viscosity, care must be taken not to evaluate the viscosity as a singular value, but to consider other test results that might provide clues as to why a viscosity did or didn’t change (such as Acid Number (AN), fuel dilution, oxidation, etc.). Viscosity is one of very few tests that indicates a problem when it is too low or too high. Viscosity gives us indications of oxidation and other thickening processes from oil degradation, fuel contamination in liquid-fueled engines, addition of incorrect lube and much more. By multiplying the time measured by the tube factor a viscosity in centistoke (cSt) is calculated. The oil is started flowing and the time for the oil to pass by two regions on the tube is measured. Viscosity is performed by adding a preset volume of oil to a calibrated viscosity tube which is immersed in a temperature controlled bath (typically either 40☌ for industrial oils and other fluids, or 100☌ for engine oils). Viscosity is the most important single property of a lubricant. MLT1 - Machinery Lubrication Technician.Professional Memberships & Associations.> Membrane Patch Colorimetry - ASTM D7843.Power Industry (Steam, Gas, Aero-Derivative Turbines).
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