IEC 61566:1997 pdf download – Measurement of exposure to radio-frequency electromagnetic fields -Field strength in the frequency range100 kHz to 1 GHz

IEC 61566:1997 pdf download – Measurement of exposure to radio-frequency electromagnetic fields -Field strength in the frequency range100 kHz to 1 GHz.
IEC 61566 applies to measurements of electromagnetic fields from operational transmitting equipment to ensure that the transmissions do not constitute a potential hazard to workers or to the general public.
The purpose of this standard is to promote a common understanding of technical requirements and precautions necessary for the accurate measurement of electromagnetic fields carried out in conjunction with relevant national exposure regulations
This standard covers transmissions in the frequency range 100 kHz to 1 GHz.
NOTE — Poigible etenson at thu tre,encl, range up to 2 0Hz or 3 0Hz WuU be investugated.
This International Standard does not specify limiting values lot exposure as these are usually given in exposure standards issued by responsible health authorities. This standard is, therefore, intended to be used in conjunction with the relevant national standards or regulations applicable in the country concerned. In the absence of any national rules restricting exposure to radiofrequency electromagnetic fields, the recommendations of the International Non- Ionizing Radiation Committee (INIRC) may be followed. The 1988 INIRC recommendations on exposure limits are summarized in annex A.
2 Normative reference
The following normative document contains provisions which, through reference In this text. constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibdity of applying the most recent edition of the normative document indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60215: 1987, Safety requirements for radio transmitting equipment
3 Definitions
For the purpose of this International Standard, the following definitions apply.
3.1 dIpole, elementary. Dipole of short length compared to wavelength. A mathematical concept, widely used In theoretical antenna analysis, based on a short element of wire compared to the wavelength carrying an oscillatory current.
3.2 exposure: Occurs where a person is subjected to eleclñc, magnetic, or electromagnetic fields or to contact currents other than those originating from physiological processes in the body and other natural phenomena.
3.3 exposure, partial — body: Occurs where RF fields are substantially non-uniform over the body. Fields which are non-uniform over volumes comparable to the human body may occur due to highly directional sources, standing waves, re-radiating sources. RF hot-spots, or in the near-field.
3.4 exposur. standard: Regulations, recommendations or a standard dealing with limits of permissible exposure, publishOd by a responsible authority.
3.5 far-field region: That region of the field of an antenna where the angular field distribution is essentially independent 01 the distance from the antenna. In this region, the field has predominately a plane-wave character i.e. with locally uniform distributions of electric field strength and of magnetic field strength in planes transverse to the direction of propagation. In this region. the electric and magnetic fields do not have a plane-wave character. The near-field region i further subdivided into the reactive near-field region, which is closest to the radiating structure and which contains most or nearly all of the stored energy, and the radiating near-field region where the radiation field predominates over the reactive field but lacks substantial plane-wave character and is complicated in structure.
NOTES
I For moat antennaa. the outer boundary of the reactiye near-f.4d region is commonly taken to exist at a dixLanc of one-half w.ivelength from the antenna surIce.
2 Th, radiating near-field region is somslirns referred to as the Fresnel region.
37 non-ionIzing radiation: Any electromagnetic radiation incapable of dissociating electrons from atoms or molecules to produce ions or ionized molecules directly or indirectly. RF waves are non-ionizing radiations.