【正文】 ion of less than 200 ms, . during switching events, are disregarded. If a switching action occurs during the measurements, the measurement has to be repeated. The measuring equipment is to have a maximum noise level of 5 % of the limit value. Any measured value below the maximum noise level is disregarded. The background level is to be less than 5 % of the limit value. The response time for the measuring equipment to reach 90 % of the final value is not to exceed 1 s. The magic 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 – 400 kHz signals. During the final measurement the sensor should remain stationary. Time domain evaluation }This is the reference method and is used in case of doubt. Independent of the type of the signal, a time domain measurement of the value of the magic flux density can be carried out. For fields with several frequency ponents, 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.~ BS EN 62233:2020 – 10 – }The transfer function is to be established using a first order filter and shall have the characteristics shown in Figure Z1. Transfer function A 43,5 16,0 1,0 0,2 Frequency 10 Hz 50 Hz NOTE Logarithmic scales are used for both axes. 800 Hz 150 kHz 400 kHz Figure Z1 Transfer function The following sequence is used for the measurements: ? perform a separate measurement of each coil signal。 – definition of operating mode for appliance under test。 The fields of multifunction equipment which is subjected simultaneously to different clauses of this standard and/or other standards shall be assessed using the provisions of each clause/standard for the relevant functions in operation. Abnormal operation of the appliances is not taken into consideration. This standard includes specific elements to assess human exposure: – definition of sensor。 – radio transmitters。 – medical electrical appliances。 – apparatus intended to be part of the fixed electrical installation of buildings (such as fuses, circuit breakers, cables and switches)。 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62233:2020 E BS EN 62233:2020 – 2 – Foreword The text of the International Standard IEC 62233:2020, prepared by IEC TC 106, Methods for the assessment of electric, magic and electromagic fields associated with human exposure, together with mon modifications prepared by a Joint Editing Group of the Technical Committee CENELEC TC 61, Safety of household and similar electrical appliances, and CENELEC TC 106X, Electromagic fields in the human environment, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 62233 on 20201201. This European Standard supersedes EN 50366:2020 + A1:2020, to which it is technically equivalent. The following dates are applicable: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 20201201 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 20201201 Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 62233:2020 was approved by CENELEC as a European Standard with agreed mon modifications. – 3 – BS EN 62233:2020 CONTENTS INTRODUCTION .....................................................................................................................5 1 S cope ............................................................................................................. ..................6 2 Normative references ....................................................................................................... 7 3 Terms and definitions ...................................................................................................... . 7 Physical quantities and units ................................................................................... 7 Terms and definitions ..............................................................................................7 4 Choice of test method .................................................................................................... . 8 5 Measuring methods ..........................................................................................................8 Electric fields.......................................................................................................... . 8 Frequency range .....................................................................................................8 Measuring distances, positions and operating mode ................................................9 Magic field sensor ..............................................................................................9 Measuring procedures for magic fields .............................................................. . 9 Measurement uncertainty ..................................................................................... . 13 Test report ............................................................................................................ 13 6 Evaluation of results ...................................................................................................... . 13 Annex A (normative) Test conditions for the measurement of magic flux density ......