Metrological Characterization of a 20 N·m Torque Calibration Standard Machine at PTB, Germany

摘要

This article describes a new deadweight torque calibration machine for the range of 100 mN m to 20 N m at PTB. Construction details as well as a description of the main operation principle will be given. The uncertainty of the provided torque steps will be calculated according to the conventional error propagation according to the GUM. The obtained uncertainty will be verified by comparison measurements with the PTB 1 kN m deadweight torque standard machine.