Scientific Fundamentals for the Realization and Measurement of Small Torques - Development of a Torque Standard Machine for Small Torques with Reduced Uncertainty - DEBRATOR 2

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The main project objective is to reduce the achievable relative expanded uncertainty of measurement for small torques significantly and to verify this with the help of a demonstrator. In preliminary works, the critical uncertainty influences has been detected and measures to reduce these influences has been developed. These measure needs to be detailed and verified experimentally. One of these measures is the use of a high precision bearing, whose application is builds the first milestone. Another milestone is the verification of a new measuring method to determine the lever length. This will reduce the uncertainty influence of the length significantly. The third milestone builds the main objective, the verification of the realization of small torques from 1 mN•m to 1 N•m with a relative expanded uncertainty of measurement Ur = 1•10-5 (k=2). The last milestone is the documentation of the results as recommendations and guidelines for the development and the operation of small torque standard machines.