Abstract
Calibration of force transducers in the Meganewton range is typically performed by comparison with reference build-up systems (BUS) under hydraulic presses for high loads. The centring of a BUS is a difficult operation due to its weight and dimension, and possible misalignments and the resulting effects are usually neglected. In this work the effect on force measurements due to a 3 mm misalignment of a 3 MN BUS was evaluated. Measurements were performed at INRiM and at LNE in hydraulic presses. It is shown that the relative measurement errors due to misalignment were lower than the declared CMC uncertainty, thus the shift of the BUS did not influence the measurements.
Highlights
The calibration of a force transducer may represent a challenge in the Meganewton range due to the maximum load limits that most of dead weight force standard machines (FSMs) can apply
Calibration of force transducers in the Meganewton range is typically performed by comparison with reference build-up systems (BUS) under hydraulic presses for high loads
Reference force transducers used in the hydraulic presses FSMs at INRiM and LNE were a 5 MN uniaxial force transducers (UFTs) and another 3 MN BUS, respectively
Summary
The calibration of a force transducer may represent a challenge in the Meganewton range due to the maximum load limits that most of dead weight force standard machines (FSMs) can apply. Calibration of force transducers in the Meganewton range is typically performed by comparison with reference build-up systems (BUS) under hydraulic presses for high loads. In this work the effect on force measurements due to a 3 mm misalignment of a 3 MN BUS was evaluated. Measurements were performed at INRiM and at LNE in hydraulic presses.
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