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This calculation yields the electric field strength E’ at the frequency f ‘. 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. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. The following dates are applicable: Wn where Wn Br.
To compare the measured values with limits, the reference level B RL j must be used. This method provides a value for the coupling factor depending on the radius of the equivalent coil. As you can see this coil is a good approximation. However, only circular current loops were used as sources to calculate the coupling factors. For appliances with highly localised fields the coupling factor a c r 1 given in Annex C can be taken into account.
The running-in time is not specified but, prior to testing, the appliance is operated iev a sufficient period to ensure that the conditions of operation are typical of those during normal use. TC – Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure rss.
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A list of organizations represented on this committee can be obtained on request to 6233 secretary. For details of these and other benefits contact Membership Administration.
General IECExposure to electric and magnetic fields in the low and intermediate frequency range — Methods for calculating the current density and internal electric field induced in the human body — Part The procedure calculates back to the basic restrictions. For fields with several frequency proportions the calculation of a frequency weighted sum is necessary. NOTE These limits do not apply for the protection of workers against exposure to electromagnetic fields.
NOTE 1 The total measurement uncertainty can comprise aspects such as sensor position, operating conditions, noise background or the 6233 exceeding the dynamic range of the measuring instrument. However, pre-set controls are used in the intended position.
The simplest and more practical levels [limits] with which to comply are limits suitably timeaveraged kec some cases on the electric E and magnetic B fields, measured in the absence of the 62323 to be exposed to these fields. This document addresses the additional measurement and calculation techniques which permit determination of compliance under one set of specified circumstance, without reference to time of exposure or actual exposure conditions. Accept and continue Learn more about the cookies we use and how to change your settings.
BS IEC 62233:2005
Abnormal operation of the appliances is ic taken into consideration. In addition to the listed restrictions, exposure of the head and torso to magnetic fields below 10 Hz shall be restricted to a peak value of mT for the general public, and mT in the controlled environment.
NOTE 2 The radius r coil which is larger dimension than the distance r can not be determined by the procedure in Annex C. Numerical study on an equivalent source iex for inhomogeneous magnetic field dosimetry in the low-frequency range. It is recommended to use a small sensor, e. The thermostat is adjusted to lowest temperature setting.
NOTE 1 It is permissible to use a single direction sensor not isotropic in combination with idc appropriate summation method. It is the constant aim of BSI to improve the quality of our products and services.
NOTE 2 The procedure is applicable only for concentrated sources. You may find similar items within these categories by selecting from the choices below:. Equipment where the full working cycle 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.
Independent of the type of the signal, a time domain measurement of the value of the magnetic flux density can be carried out. Bioelectromagnetics, vol.