A Standard for Rotatory Power Measurement

Andreas Brüge, Harald Pfeiffer


In Germany, the realisation and dissemination of the unit of rotatory power is a legal task of the national metrology institute aimed at ensuring the safe operation of ergometers for patients. At the Physikalisch-Technische Bundesanstalt, this task is carried out by means of a standard that can be operated both as a regulated brake and as a regulated drive, so that the effective torque and the revolution speed can be measured traceably. In this article, technical details and uncertainty calculations about this standard are given.

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DOI: http://dx.doi.org/10.21014/acta_imeko.v8i3.561