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1、BRITISH STANDARD BS CISPR 16-4:2002 Specification for radio disturbance and immunity measuring apparatus and methods Part 4: Uncertainty in EMC measurements ICS 33.100.10; 33.100.20 ? Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncon
2、trolled Copy, (c) BSI BS CISPR 16-4:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 15 August 2002 BSI 15 August 2002 ISBN 0 580 4025
3、6 8 National foreword This British Standard reproduces verbatim CISPR 16-4:2002 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee GEL/210, EMC Policy committee, to Subcommittee GEL/210/12, EMC basic and generic standards, whic
4、h has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitl
5、ed “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application. Compliance
6、 with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related inte
7、rnational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the CISPR title page, pages 2 to 19 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amend
8、ments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI COMMISSION ELECTROTECHNIQUE INTERNATIONALE CISPR 16-4 INTERNATIONAL ELECTROTECHNICAL COMMISSION Premire ditio
9、n First edition 2002-05 Spcifications des mthodes et des appareils de mesure des perturbations radiolectriques et de limmunit aux perturbations radiolectriques Partie 4: Incertitudes de mesure CEM Specification for radio disturbance and immunity measuring apparatus and methods Part 4: Uncertainty in
10、 EMC measurements Numro de rfrence Reference number CISPR 16-4:2002 COMIT INTERNATIONAL SPCIAL DES PERTURBATIONS RADIOLECTRIQUES INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncont
11、rolled Copy, (c) BSI CONTENTS FOREWORD. 3 1 Scope. 4 2 Normative references . 4 3 Definitions and symbols 4 3.1 General symbols . 5 3.2 Measurands 5 3.3 Input quantities. 5 4 Measurement instrumentation uncertainty. 6 4.1 Overview. 6 4.2Quantities to be considered for conducted disturbance measureme
12、nts at a mains port . 7 4.3 Quantities to be considered for disturbance power measurements. 7 4.4 Quantities to be considered for radiated disturbance measurements of electric field strength on an open area test site or alternative test site. 7 Annex A (informative) Basis for Ucispr values in Table
13、1. 8 Bibliography19 BS CISPR 164:2002 2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL ELECTROTECHNICAL COMMISSION INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE _ SPECIFICATION FOR RADIO
14、DISTURBANCE AND IMMUNITY MEASURING APPARATUS AND METHODS Part 4: Uncertainty in EMC measurements FOREWORD 1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of
15、 the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National
16、Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (IS
17、O) in accordance with conditions determined by agreement between the two organizations. 2)The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representatio
18、n from all interested National Committees. 3)The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to
19、promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearl
20、y indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard
21、may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard CISPR 16-4 has been prepared by CISPR, subcommittee A: Radio- interference measurements and statistical methods. The text of this standard is based on the
22、following documents: FDISReport on voting CISPR/A/355/FDISCISPR/A/377/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 3. Annex A i
23、s for information only. The committee has decided that the contents of this publication will remain unchanged until 2004. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. BS CISPR 164:2002 3 Licensed Copy: London South Bank University, London S
24、outh Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI SPECIFICATION FOR RADIO DISTURBANCE AND IMMUNITY MEASURING APPARATUS AND METHODS Part 4: Uncertainty in EMC measurements 1 Scope This part of CISPR 16 is designated a basic standard, which specifies the manner in wh
25、ich measurement uncertainty is to be taken in to account in determining compliance with CISPR limits. The material is also relevant to any EMC test when interpretation of the results and conclusions reached will be impacted by the uncertainty of the instrumentation used during the testing. Annex A c
26、ontains the background material used in providing the amount of measurement uncertainty found in generating the CISPR values shown in Clause 4 and hence provides valuable background material for those needing both initial and further information on measurement uncertainty and how to take into accoun
27、t individual uncertainties in the measurement chain. The annex however is not intended to be a tutorial of user manual or to be copied when making uncertainty calculations. For that, the references shown in the bibliography should be used. Measurement instrumentation specifications are given in CISP
28、R 16-1, while the methods of measurement are covered in CISPR 16-2. Further information on radio disturbance and other uncertainty considerations are given in CISPR 16-3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer
29、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. CISPR 16-1:1999, Specification for radio disturbance and immunity measuring apparatus and methods Part 1: Radio disturbance and immunity measuring apparatu
30、s CISPR 16-2, Specification for radio disturbance and immunity measuring apparatus and methods Part 2: Methods of measurement of disturbances and immunity CISPR 16-3, Specification for radio disturbance and immunity measuring apparatus and methods Part 3: Reports and recommendations of CISPR 3 Defin
31、itions and symbols For the purpose of this part of CISPR 16, the following symbols apply. NOTE General uncertainty terms and definitions used in uncertainty are contained in bibliography reference 2. General definitions are contained in bibliography reference 1. These definitions will not be repeate
32、d here. BS CISPR 164:2002 4 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3.1 General symbols Xiinput quantity xiestimate of Xi u(xi)standard uncertainty of xi cisensitivity coefficient yresult of a measureme
33、nt, (the estimate of the measurand), corrected for all recognised significant systematic effects uc(y)(combined) standard uncertainty of y kcoverage factor Uexpanded uncertainty of y 3.2 Measurands VVoltage, in dB(V) PDisturbance power, in dB(pW) EElectric field strength, in dB(V/m) 3.3 Input quanti
34、ties VrReceiver voltage reading, in dB(V) LcAttenuation of the connection between the receiver and the artificial mains network, absorbing clamp or antenna, in dB LamnVoltage division factor of the AMN, in dB LacInsertion loss of the absorbing clamp, in dB AFAntenna factor, in dB(/m) VswCorrection f
35、or receiver sine wave voltage inaccuracy, in dB VpaCorrection for imperfect receiver pulse amplitude response, in dB VprCorrection for imperfect receiver pulse repetition rate response, in dB VnfCorrection for the effect of the receiver noise floor, in dB MCorrection for the error caused by mismatch
36、, in dB MDCorrection for the error caused by mains disturbances, in dB ZCorrection for imperfect AMN impedance, in dB ECorrection for the effect of the environment, in dB AFfCorrection for antenna factor interpolation error, in dB AFhCorrection for the difference between the antenna factor variation
37、 with height, and the variation with height of the antenna factor of a reference dipole, in dB AdirCorrection for antenna directivity, in dB AphCorrection for antenna phase centre location, in dB AcpCorrection for antenna cross-polarisation response, in dB AbalCorrection for antenna unbalance, in dB
38、 SACorrection for imperfect site attenuation, in dB dCorrection for imperfect antenna distance, in dB hCorrection for imperfect table height above ground plane, in dB BS CISPR 164:2002 5 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Un
39、controlled Copy, (c) BSI 4 Measurement instrumentation uncertainty 4.1 Overview Measurement instrumentation uncertainty shall be taken into account when determining compliance or non-compliance with a disturbance limit. The measurement instrumentation uncertainty for a test laboratory shall be evalu
40、ated for those measurements addressed in the following subclauses, taking into consideration each of the quantities listed there. The standard uncertainty u(xi) in decibels and the sensitivity coefficient ci shall be evaluated for the estimate xi of each quantity. The combined standard uncertainty u
41、c(y) of the estimate y of the measurand shall be calculated as = i ii xucyu)()( 22 c The expanded measurement instrumentation uncertainty Ulab for a test laboratory shall be calculated as )(2 clab yuU= and shall be stated in the test report. NOTE 1 The coverage factor k = 2 yields approximately a 95
42、 % level of confidence for the near-normal distribution typical of most measurement results. Compliance or non-compliance with a disturbance limit shall be determined in the following manner. If Ulab is less than or equal to Ucispr in table 1, then: compliance is deemed to occur if no measured distu
43、rbance exceeds the disturbance limit; non-compliance is deemed to occur if any measured disturbance exceeds the disturbance limit. NOTE Ucispr resembles a value of measurement uncertainty for a specific test, which was determined by considering uncertainties associated with the quantities listed in
44、4.2. If Ulab is greater than Ucispr in table 1, then: compliance is deemed to occur if no measured disturbance, increased by (Ulab Ucispr), exceeds the disturbance limit; non-compliance is deemed to occur if any measured disturbance, increased by (Ulab Ucispr), exceeds the disturbance limit. Table 1
45、 Values of Ucispr MeasurementUcispr (9 kHz 150 kHz)4,0 dB Conducted disturbance (mains port) (150 kHz 30 MHz)3,6 dB Disturbance power(30 MHz 300 MHz)4,5 dB Radiated disturbance (electric field strength on an open area test site or alternative test site) (30 MHz 1 000 MHz)5,2 dB Other Under considera
46、tion NOTE 2 The values of Ucispr in Table 1 are based on the expanded uncertainties in Annex A, which were evaluated by considering uncertainties associated with the quantities listed below. Nothing in this clause removes the requirement for measuring apparatus to comply with specifications in CISPR
47、 16-1. BS CISPR 164:2002 6 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:49:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4.2 Quantities to be considered for conducted disturbance measurements at a mains port Receiver reading Attenuation of the connection b
48、etween artificial mains network and receiver Artificial mains network voltage division factor Receiver sine-wave voltage accuracy Receiver pulse amplitude response Receiver pulse response variation with repetition frequency Receiver noise floor Mismatch effects between artificial mains network recei
49、ver port and receiver Artificial mains network impedance 4.3 Quantities to be considered for disturbance power measurements Receiver reading Attenuation of the connection between absorbing clamp and receiver Absorbing clamp insertion loss Receiver sine-wave voltage accuracy Receiver pulse amplitude response Receiver pulse response variation with repetition frequency Receiver noise floor Mismatch effects