Magnetic field measurement, AC and DC fields
With magnetic field measurement instruments electromagnetic fields are measured for assessing the safety of human exposure to radiation in magnetic fields and for acceptance testing of electrically operated equipment according standards like IEC/EN 62233 (formerly EN 50366), generic standard like IEC 62311 as well as ICNIRP 1998 and ICNIRP 2010. However, in addition, typical applications are direct evaluation of field exposure in comparison with major standards and regulations such as EMF Directive 2013/35/EU for workplaces, office places but also living places.
Typically measurements are taken of electrical installations such as transformers, low voltage distribution, switch gear, bus bars, cables, overhead lines and railways. However, DC fields such as from NMR / magnets, tramways and moving metal objects or weak fields inside laboratories, are measured, too. Depending on the measurement instruments, the sensitivity goes as low as 10pT (pico tesla). Typical use are site survey for ebeam applications, measurement of the attenuation of magnetic shielding measures and analysis of interfering frequencies.
|Measurement in TEM lab||Measurement in hospital room||Measurement in laboratory||Measurement of railway fields||Measurement in clean room|