SEISMOMETERS CALIBRATION: COMPARISON BETWEEN A RELATIVE ELECTRICAL METHOD AND A VIBRATION EXCITER BASED ABSOLUTE METHOD

F. Larsonnier, G. Nief, P. Dupont, P. Millier

Abstract

Considering the vibration metrology field, seismometers calibration is a challenge because of low frequency, and the heavy mass of the sensors. The CEA designs short period horizontal and vertical ground velocity measurements single axis seismometers, uses, and maintains them in operational condition. Their response is calibrated with an electrical method during their operational life to ensure that they fulfil their technical requirements. Thanks to the PTB multi-component exciter we calibrated an horizontal and a vertical short-period seismometers as well as a STS-2 according to the ISO 16063 standard method. The author presents a comparison of the two methods and the associated results.

Keywords

seismometer, calibration, STS-2

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IMEKO-TC22-2014-013.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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