OIL ANALYSIS TESTS

Viscosity

This test determines the kinematic viscosities of liquid petroleum products and hydraulic fluids at 40°C and 100°C. The apparatus consists of four calibrated tubes mounted in an oil bath maintained at a constant temperature.

The lubricating system keeps friction between surfaces to a minimum and assists in heat dissipation. Therefore the efficient operation of any equipment relies on use of the correct viscosity lubricant. Kinematic viscosities are determined at 40°C and/or 100°C. Significant deviation (+ or - 20%) from the viscosity of the fresh oil may indicate a build up of oxidation products due to overheating, contamination with fuel, hydraulic fluid, water, or top-up with oil of a different grade or degradation of the oil itself.

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