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.
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It supersedes BS EN The start and finish of each common modification is indicated in the text by tags??. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from legal obligations. A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
This European Standard supersedes EN The following dates are applicable: 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. Existing exposure standards, e. The simplest and more practical levels [limits] with which to comply are limits suitably timeaveraged in some cases on the electric E and magnetic B fields, measured in the absence of the human to be exposed to these fields.
Suitable definitions and specified measurement techniques are applied in any exposure compliance measurement or assessment. Compliance with maximum permissible exposure or reference levels is sufficient for positive assessment of meeting these levels as specified in the appropriate exposure standard.
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. This document is not meant to supplant definitions and procedures specified in exposure standards but is aimed at supplementing the procedure already specified for compliance with exposure.
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. Appliances include such equipment as household electrical appliances, electric tools and electric toys.
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 standard does not apply to: Abnormal operation of the appliances is not taken into consideration.
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This standard includes specific elements to assess human exposure: The measurement methods specified are valid from 10 Hz to kHz. 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. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document including any amendments applies. IEC all partsSafety of household and similar electrical appliances IECMeasurement of low-frequency magnetic and electric fields with regard to exposure of human beings — Special requirements for instruments and guidance for measurements IECAssessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields 0 Hz — GHz 2 CISPRElectromagnetic compatibility — Requirements for household appliances, electric tools and similar apparatus — Part 1: Emission 3 Terms and definitions For the purpose of this standard the following terms and definitions apply.
Internationally accepted SI-units are used throughout the standard. The basic restriction for the current density is J BRthe basic restriction for the internal electric field strength is E BR ——————— 2 To be published.
This is the reference method, which has to be used in case of dispute.
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 ic this standard.
A 6233 by step procedure can be applied, from the easiest methods to the more complicated ones, see the flow diagram in Figure 1. If appliances, with their internal transformer or electronic circuit, are working at voltage lower than 1 V, they are deemed to comply without testing. See Scope Clause 1. If it is not feasible to cover the frequency range in one measurement, the weighted results of each measured frequency range shall be added.
EN 62233:2008 (IEC 62233:2005 (Modified))
The configuration and mode of operation during measurement shall be noted in the test report. The outside diameter of the 622333 sensor shall not exceed ifc cm. NOTE 1 It is permissible to use a single direction sensor not isotropic in combination with an appropriate summation method.
NOTE 2 The final value of the magnetic flux density is the vector addition of the values measured in each direction. This ensures that the measured value is independent of the direction of the magnetic field vector. If a switching ief occurs during the measurements, the measurement has to be repeated.
Any measured value below the maximum noise level is disregarded. The magnetic flux density is determined by using an averaging time of 1 s. Shorter sampling times may be used if the source is shown to be constant over a period greater than 1 s for 10 Hz — kHz signals.
During the final measurement the sensor should remain stationary. Independent of the type of the signal, eic time domain measurement of the value of the magnetic flux density can be carried out. For fields with several frequency components, the dependency on frequency of the reference levels is taken into account by implementing a transfer function A which is inverse of the reference level expressed as a function of the frequency.
Figure Z1 – Transfer function The following sequence is used for the measurements: The result is the weighted r. This procedure is shown schematically in Figure Z2.
With appliances with highly localized fields, this has to be performed after taking the coupling factor ac r1 given in Annex C into account. The final weighted result, W, can be derived as follows: Wn where Wn Br. The magnetic flux density is measured at each relevant frequency.
This can be achieved by recording the time signal of the flux density and using a Fourier transformation for evaluating the spectral components. The following sequence is used for the measurements: Result is the amount of the magnetic flux density for each detected frequency.
To compare the measured values with limits, the reference level B RL j must be used.
For appliances with highly localised fields the coupling factor a c r 1 given in Annex C can be taken into account. For fields with several frequency proportions the calculation of a frequency weighted sum is necessary.
The weighted result is obtained from the following formula: With most measurement equipment the relative phases are not measured for example if a spectrum analyser is usedbut an rms summation of frequency components can be undertaken.
This will usually give a more realistic outcome than neglecting phase completely. Appliances are considered to meet the requirements of this standard when all the following conditions are fulfilled: NOTE An active notch filter is a suitable means for suppressing the mains frequency. If the conditions are not fulfilled another measurement according to the reference method is recommended.
Appliances that are constructed so that they only produce very weak magnetic fields, when the mains frequency is dominating, are considered to meet the requirements of this standard when all the following conditions are fulfilled: Guidance to assess uncertainty is provided in IEC NOTE 1 The total measurement uncertainty can comprise aspects such as sensor position, operating conditions, noise background or the signal exceeding the dynamic range of the measuring instrument.
NOTE This applies e. For specific apparatus the corresponding coupling factor a c r 1 can be determined as described in Annex C, or if the value still exceeds the reference level when using the coupling factor, it does not necessarily follow that the basic restrictions will be exceeded. It shall be verified, e.
For calculation methods, IEC can be used. Line spectrum evaluation No Result Fail Pass 5. Manufacturer’s specifications regarding short time operation have to be taken into account.
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The running-in time is not specified but, prior to testing, the appliance is operated for a sufficient period to ensure that the conditions of operation are typical of those during normal use. However, pre-set controls are used in ice intended position. The measurements are made while the appliance is energized.
For equipment for 6223 it is not practical to test with each function operated separately, or where the separation of a particular function would result in the equipment being unable to fulfil its primary function, the equipment shall be operated with the minimum number of functions needed to operate. When operating with power from the battery, the battery shall be fully charged prior to start the test.
When cooling lowest temperature setting. When heating highest temperature setting Charging a discharged battery having the highest capacity specified by the manufacturer Spread out and laid on a sheet of thermal insulation Continuously, no load Continuously, no load Continuously As specified in 3. When heating highest temperature setting Spread out and laid on a sheet of 6223 insulation Spread out and laid on a sheet of thermal insulation As specified in 3.
As specified in 3. Conventional heating elements, if available, are operated simultaneously at their highest setting. The load is 1 l of tap water, placed in the centre of the shelf. The water container is made of 62323 non-conductive material such as glass jec plastic.
Continuously without load, highest speed setting Continuously, highest heat setting Oven empty with door closed, thermostat being at the highest setting. Also in the cleaning mode, if available, as described ice the instructions for use. Each function separately Controls at highest setting Continuously with the door closed. The thermostat is adjusted to lowest temperature setting.
The cabinet is empty. The measurement is made after steady conditions have been reached but with active cooling in all compartments. Half-filled with water, without lid and highest heat setting Continuously without load Continuously without load, highest speed setting Continuously, highest settings Continuously, highest settings Continuously without load Continuously, highest heat setting Continuously, no load Without load, highest heat setting No-load, all settings e.
For fundamental operating frequencies greater than Hz and lower than kHz, the coupling factor is ac r1 x 1, The measurements are made up to 1 m above the cooking zone and 0,5 m below it.
The measurement is not made at the rear of the appliance line D if it is intended to be used when placed against a wall. The smallest vessel recommended in the instructions for use is used.