EN replaces EN Global exports easier for manufacturers after harmonization with international standard. IEC No problem. Buy IEC Ed. Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure from. Buy IEC MEASUREMENT METHODS FOR ELECTROMAGNETIC FIELDS OF HOUSEHOLD APPLIANCES AND SIMILAR APPARATUS WITH.
Equivalent source model for electrical appliances emitting low frequency magnetic fields. Search all products by. Existing exposure standards, e. NOTE 2 The radius r coil which is larger dimension than the distance r can not be determined by the procedure in Annex Idc. Appliances may incorporate motors, heating elements or their combination, may contain electric or electronic circuitry, and may be powered by the mains, by batteries, or by any other electrical power source.
TC – Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure rss. Step 4 Calculation of the coupling factor In case of measuring according to 5.
This European Standard supersedes EN In consequence the factor ac r is frequency independent within these ranges see Figure C. This standard includes specific elements to assess human exposure: This is the reference method, which has to be used in case of dispute. Microwave and Optical Technology LettersMay 20,vol.
It is applicable only for the region close to the source and not for homogenous fields. Any measured value below the maximum noise level is disregarded. As specified in 3. It shall be verified, e.
NOTE 2 The final value of the magnetic flux density is the vector addition of the values measured in each direction. If a switching action occurs during the measurements, the measurement has to be repeated. The water container is made of electrically non-conductive material such as glass or plastic. To compare the measured values with limits, the reference level B RL j must be used. The part in the middle is a cylinder with a diameter of mm and for the head and shoulders the details are shown in Figure D.
Appliances not intended for normal household use but which nevertheless may be approached by the public, or may be used by laymen, are within the scope of this standard.
This will usually give a more realistic outcome than neglecting phase completely. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services.
Step 2 Determination of the equivalent coil The measurement results from step 1 are used to determine the 622333 of an equivalent coil which gives a similar integral G. Looking in Table C. However, only circular current loops were used as sources to calculate the coupling factors. The following sequence is used for the measurements: This document is designed as one method for measurement and assessment of electromagnetic EM fields and their potential effect on the human body by reference to exposure standards.
See Scope Clause 1. A list of organizations represented on this committee can be obtained on request to its secretary. The distance between measuring points is in the range of 0,5 cm to 1 cm.
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Independent of the type of the signal, a time domain measurement of the value of the magnetic flux density can be carried out. Users are responsible for its correct application. It is recommended to use a small sensor, e. For dated references, only the edition cited applies. This figure shows the front left hand induction heating element of a 4-zone hob in operation.
MAGNETIC FIELD HiTESTER
If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained.
For fields with several frequency proportions the calculation of a frequency weighted sum is necessary. The basic restriction for the current density is J BR iecc, the basic restriction for the internal electric field strength is E BR ——————— 2 To be published.
In the frequency range above kHz and below 10 Hz appliances in the scope of this standard are deemed to comply without testing unless otherwise specified in IEC series.
When heating highest temperature irc Spread out and laid on a sheet of thermal insulation Spread out and laid on a sheet of thermal insulation As specified in 3.
The result is the weighted r.
NOTE This applies e. The field distribution from the hot spot with Bmax to 0,1 Bmax shall be continuous. For fundamental operating frequencies greater than Hz and lower than kHz, the coupling factor is ac r1 x 1, Numerical calculation of current densities 6223 in the human body caused by low frequency inhomogeneous magnetic sources.
The measurement is made after steady conditions have been reached but with active cooling in all compartments.
NOTE 2 The procedure is applicable only for concentrated sources. Equipment where the full working kec is less than 1 s shall be measured according to IEC for pulsed fields; however operating conditions, measuring distances and coupling factor are given in this standard.
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