CHARACTERISATION OF MAGNETIC FIELD MEASURING INSTRUMENTS IN PRESENCE OF NON-SINUSOIDAL MAGNETIC FIELDS
G. Crotti, D. Giordano
Abstract:
The behaviour of the low and medium frequency environmental magnetic field meters is investigated with reference to the possible approaches that can be implemented to evaluate compliance with the field exposure limits. The investigation is carried out both numerically and experimentally, in presence of sinusoidal and distorted waveforms, which are produced by the systems for the generation of reference magnetic fields up to 100 kHz set up at the Istituto Nazionale di Ricerca Metrologica of Torino. The adoption of different methods in the evaluation of the compliance to the exposure prescription may lead to different or even apparently inconsistent evaluations, when operating in presence of both sinusoidal and nonsinusoidal fields. By taking into account the different meter characteristics and output quantities, suitable checks of the measuring instruments with complex magnetic field waveforms of known frequency spectrum should be performed by adopting specific measurement procedures.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
Title:
XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation (together with 13th IMEKO TC4 Workshop on ADC Modelling and Testing)
