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Title: A new calibration set-up for the dynamic calibration of bridge amplifiers from DC up to 10 kHz
Author(s): L. Klaus, F. Beug and T. Bruns
Year: 2017
Book title: Proc. of IMEKO TC3, TC5 and TC22 International Conference 2017
Publisher address: Helsinki, Finnland
File URL: http://www.imeko.org/publications/tc3-2017/IMEKO-TC3-2017-011.pdf
Abstract: Measurements of mechanical quantities are often carried out with transducers having a bridge output. These output signals are conditioned using bridge amplifiers. If dynamically changing quantities are going to be measured traceably, the bridge amplifier has to be calibrated dynamically.This paper describes a dynamic bridge amplifier calibration set-up based on the new PTB dynamic bridge standard. The calibration is carried out by synchronous sampling of the bridge amplifier output voltage and a reference signal provided by the calibrated dynamic bridge standard. The dynamic bridge standard enables calibrations in a frequency range from DC (static calibration) up to 10 kHz. An overview of the different measurement uncertainty contributions is given and the first measurement results show a good agreement with a previously established measurement set-up.

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