Evaluation of the uncertainty due to dynamic effects in linear measuring devices – Preliminary results

Abstract Systematic dynamic effects in linear measuring devices include possible amplification or attenuation, and phase shift of the spectral components of the indicated signal in respect to the original phenomenon. When this effect is non negligible, dynamic compensation should be applied. Yet in any case uncertainty on the modulus and the phase of the frequency response of the device will cause uncertainty on the final measurement results. Therefore, a simple formula for the evaluation of such uncertainty is presented, for periodic or harmonic dynamic phenomena.