Transfer-Normal für Wirkleistung im Frequenzbereich bis 150 kHz

The aim of this study is the construction of a precision reference instrument for active power. With its low measurement uncertainty, the instrument is appropriate for the use as a transfer standard for active power in the frequency range up to 150 kHz.
Based on the precision power analyzer LMG600 series manufactured by ZES ZIMMER Electronic Systems GmbH, a high-precision measuring channel REF600 is developed, a reference load for the phase adjustment is constructed and estimated with reasonable accuracy.

Within the scope of the development the topics that will be addressed include:
- Development of a wideband divider for the voltage channel with the measuring range dynamic nominal from 30 mV to 500 V and small uncertainty in the frequency range up to 150 kHz.
- Construction of a wideband shunt module for the current channel with the measuring range dynamic nominal from 2.5 mA to 10 A in this frequency range.
- Modification of the signal path in the analog to digital converter unit with programmable gain amplifier, signalfilter, AD-converter and reference voltages, to the accuracy requirements for current-, voltage and power measurement.
- To estimate the measurement accuracy during the development process and for the phase adjustment a toroidal air-core coil is being built and the accuracy is estimated.