201517th International Congress of Metrology
|Number of page(s)||5|
|Section||Défis en mécanique / Challenges in mechanics|
|Published online||21 September 2015|
Calibration of bridge standard for strain gauge bridge amplifier
Federal Institute of Metrology METAS, Lindenweg 50, 3003 Bern-Wabern, Switzerland
a Corresponding author: firstname.lastname@example.org
This paper presents an automatic system developed at METAS for the calibration of bridge standards used as reference for strain gauge bridge amplifiers. This system, based on a comparison method, uses a PXI chassis with two acquisition boards to balance the bridge automatically. The use of two specific inductive voltage dividers is required to reach the very high accuracy of this type of bridge standard. With a ratio of 2 mV/V, an input voltage of 10 V at 225 Hz, the relative uncertainty is 8 ppm, which is 16 ppb of the input voltage.
© Owned by the authors, published by EDP Sciences, 2015
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