scope:

This International Standard provides guidance for measuring values of quasi -static magnetic and electric fields which have a frequency content in the range 1 Hz to 100 kHz, and DC magnetic fields, to evaluate the exposure levels of the human body to these fields. Sources of fields include devices that operate at power frequencies and produce power frequency and power frequency harmonic fields, as well as devices that produce static fields, and earth magnetic static field. The magnitude ranges covered by this standard are 0,1 µT to 200 mT in AC ( 1 µT to 10 T in DC) and 1 V/m to 50 kV/m for magnetic fields and electric fields, respectively. When measurements outside this range are performed, most of the provisions of this standard will still apply, but special attention should be paid at specified uncertainty and calibration procedure. Specifically, this standard - defines terminology; - identifies requirements on field meter specifications; - indicates methods of calibration; - defines requirements on instrumentation uncertainty; - describes general characteristics of fields; - describes operational principles of instrumentation; NOTE: measurement methods that achieve defined goals pertaining to assessment of human exposure are described in IEC 61786-2 Sources of uncertainty during calibration are also identified. In regard to electric field measurements, this standard considers only the measurement of the unperturbed electric field strength at a point in free space (i.e. the electric field prior to the introduction of the field meter and operator) or above conducting surfaces.