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An active control of a lubricant state is significant for the support of operating efficiency in machinery. At the same time a rapid control allows defining the degree of lubricating oil use directly during its operation. This paper reports the procedure offered for the definition of the dependence of lubricating material viscosity upon temperature. This dependence obtaining in the course of material operation may characterize its application in specified temperature conditions which can deteriorate because of pollution, or wear. The method developed can be realized as a compact rapid device and used at the operation of lubricating materials for the control of a degree of their use from the point of view of viscosity temperature stability.

Technological fundamentals for definition of changes in liquid medium kinematic viscosity by method of phase analysis