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1、BRITISH STANDARD BS EN 55011:1991 Specification for Limits and methods of measurement of radio disturbance characteristics of industrial, scientific and medical (ISM) radio-frequency equipment This European Standard EN 55011:1991 has the status of a British Standard Licensed Copy: sheffieldun sheffi
2、eldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 55011:1991 This British Standard was published under the authority of the Standards Board and comes into effect on 30 September 1991 BSI 12-1998 The following BSI references relate to the work on this standard: Committee
3、 reference GEL/110 Draft for comment 85/28746 DC ISBN 0 580 20031 0 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western Eu
4、ropean countries. AustriaItaly BelgiumLuxembourg DenmarkNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006,
5、 Uncontrolled Copy, (c) BSI BS EN 55011:1991 BSI 12-1998i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 550115 National appendix NA (informative)22 National appendix NB (informative)25 National appendix NC (informative)26 Licensed Copy: sheffieldu
6、n sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 55011:1991 ii BSI 12-1998 National foreword This British Standard has been prepared under the direction of the General Electrotechnical Standards Policy Committee and is the English language version of EN 55011,
7、“Limits and methods of measurement of radio disturbance characteristics of industrial, scientific and medical (ISM) radio-frequency equipment”, which endorses CISPR 11:1990 (modified) “Limits and methods of measurement of electromagnetic disturbance characteristics of industrial, scientific and medi
8、cal (ISM) radio-frequency equipment”, published by the International Special Committee on Radio Interference (CISPR). This standard supersedes BS 4809:1972, which is withdrawn. The CENELEC common modifications have been incorporated at the appropriate places in the text of CISPR 11:1990. They are ma
9、rked by a vertical line at the left-hand margin. The foreword and preface of CISPR 11:1990 and the deleted parts of the original CISPR text which do not form part of the text of EN 55011 have been quoted in National appendix NA. Annexes designated “normative” are part of the body of the standard. An
10、nexes designated “informative” are given for information only. National appendices are designated “informative”. Council Directive 89/336/EEC, dated 3 May 1989 (generally referred to as the EMC directive), is intended to limit the interference caused by electromagnetic disturbances resulting from th
11、e operation of electrical and electronic apparatus. Although the directive requires the member states of the EC to implement it on 1 January 1992, the EC Commission has introduced a proposed amendment to provide a transition period of 4 years ending 31 December 1995. During this proposed transition
12、period, manufacturers of electro-technical products would have the option either to conform to the Directive, with effect from 1 January 1992, or to continue to comply with exisiting national regulations. Any such national regulations in force within a member state before 1 January 1992 could contin
13、ue to apply until 31 December 1995 when they would have to be repealed. During this period, products manufactured in one member state which do not conform to the directive would therefore continue to be required to comply with the regulations of the member state in which they are marketed. In 3.2, 3
14、.4, 4.2 and 5.3 of this standard, a reference is made to “National Authorities”. For the United Kingdom the body responsible for regulating radio use and investigating interference to radiocommunications is: Radio Investigation Service Radiocommunications Agency Waterloo Bridge House Waterloo Road L
15、ondon SE1 8UA Telephone 071 215 2169 Fax 071 928 3691 For the purposes of this British Standard, any references to IEC page numbers in the text should be ignored. Cross-references. Details of international standards quoted in this British Standard for which there is an identical or technically equiv
16、alent British Standard are given in national appendix NC. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 55011:1991 BSI 12-1998iii A British Standard does not purport to include all the necessary provisions of a contract. Users of Bri
17、tish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Attention is drawn to The Wireless Telegraphy (Control of Interference from Electro-Medical Apparatus) Regulations 1963 S.I. 1963/1985, and The
18、Wireless Telegraphy (Control of Interference from Radio-Frequency Heating Apparatus) Regulations 1971 S.I. 1971/1675. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 2 to 26 and a back cover. This standard has been updated (see c
19、opyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06
20、 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 55011 March 1991 UDC 621.391.823.029.5:621.317.361:615.841Supersedes HD 344 S1:1975 Descriptors: Electrical equipment, industrial equipment, medical equipment, radio disturbance, measurement, ch
21、aracteristic, limit English version Limits and methods of measurement of radio disturbance characteristics of industrial, scientific and medical (ISM) radio-frequency equipment (CISPR 11:1990, modified) Limites et mthodes de mesure des caractristiques de perturbations radiolectriques des appareils i
22、ndustriels, scientifiques et mdicaux (ISM) frquence radiolectrique (CISPR 11:1990, modifie) Grenzwerte und Meverfahren fr Funkstrungen von industriellen, wissenschaftlichen und medizinischen Hochfrequenz-gerten (ISM Gerten) (CISPR 11:1990, modifiziert) This European Standard was approved by CENELEC
23、on 12 June 1989. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards
24、 may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified
25、 to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Un
26、ited Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1991 Copyright reserved to CENELEC members Ref. No. EN 55011:1991 E
27、Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 55011:1991 BSI 12-1998 2 Foreword This European Standard Standard has been prepared by the CENELEC Subcommittee SC 110A, EMC Products. The text of the draft was approved by CENELEC as EN 550
28、11 on 12 June 1989. This European Standard replaces the Harmonization Document HD 344 S1:1975. When the International Standard CISPR 11:1990 was published, SC 110A decided to replace the text of the draft by an endorsement of this publication with common modifications. The following dates are applic
29、able: Contents Page Foreword2 1Scope and object5 2Definitions5 3National measures and frequencies designated for ISM use5 4Classification of ISM equipment6 4.1Separation into groups6 4.2Division into classes6 5Limits of electromagnetic disturbances7 5.1Limits of terminal disturbance voltage7 5.2Limi
30、ts of electromagnetic radiation disturbance8 5.3Provisions for protection of specific safety services10 6Assessment of conformity of equipment10 6.1Equipment in series production10 6.2Equipment produced on an individual basis10 6.3Statistical assessment of compliance of series produced equipment10 7
31、General measurement requirements10 7.1Ambient noise10 7.2Measuring equipment11 7.3Frequency measurement12 7.4Configuration of equipment under test12 7.5Load conditions of equipment under test13 8Special provisions for test site measurements (9 kHz to 1 GHz)15 8.1Radiation test site for 9 kHz to 1 GH
32、z15 8.2Measurement of mains terminal disturbance voltage15 9Radiation measurements: 1 GHz to 18 GHz16 9.1Test arrangement16 9.2Receiving antenna16 9.3Validation and calibration of test site16 9.4Measuring procedure16 10Measurement “in situ”16 11Safety precautions17 Annex A Examples of equipment clas
33、sification19 Annex B Precautions to be taken in the use of a spectrum analyser19 Annex C Measurement of electromagnetic radiation disturbance in the presence of signals from radio transmitters20 latest date of publication of an identical national standard(dop) 1991-09-15 latest date of withdrawal of
34、 conflicting standards(dow) 1991-09-15 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 55011:1991 BSI 12-19983 Page Annex D Propagation of interference from industrial RF equipment at frequencies between 30 MHz and 300 MHz20 Figure 1 Test
35、 site17 Figure 2 Minimum size of metal ground plane17 Figure 3 Disposition of medical apparatus (capacitive type) and dummy load (see 7.5.1.1)18 Figure 4 Circuit for disturbance voltage measurements on mains supply (see 7.2.2)18 Table Ia Frequencies designated by ITU for use as fundamental ISM frequ
36、encies6 Table Ib Frequencies designated on a national basis in CENELEC countries for use as fundamental ISM frequencies6 Table IIA Mains terminal disturbance voltage limits for Class A equipment measured on a test site7 Table IIB Mains terminal disturbance voltage limits for Class B equipment measur
37、ed on a test site8 Table III Electromagnetic radiation disturbance limits for Group 1 equipment8 Table IV Electromagnetic radiation disturbance limits for Group 2 Class B equipment measured on a test site8 Table V Electromagnetic radiation disturbance limits for Group 2 Class A equipment9 Table VI L
38、imits for electromagnetic radiation disturbances to protect specific safety services in particular areas9 Table VII The non-central t-distribution factor k as a function of the sample size n11 Table I Frequencies designated by ITU for use as fundamental ISM frequencies24 Licensed Copy: sheffieldun s
39、heffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:55:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 55011:1991 BSI 12-19985 1 Scope and object 1.1 The limits and methods of measurement laid down in this
40、publication apply to industrial, scientific and medical (ISM) equipment as defined in Clause 3, and to spark erosion equipment. 1.2 The assessment of conformity of equipment tested on a test site shall be in accordance with the specifications of Clause 6. For equipment in series production, there sh
41、all be 80 % confidence that at least 80 % of manufactured items comply with the limits given. The statistical assessment procedure is specified in subclause 6.3. For small scale production the application of the statistical assessment may not always be economical. In such cases the assessment proced
42、ure contained in subclause 6.2 may be applied. Measurement results obtained for an equipment measured in its place of use and not on a test site shall relate to that installation only, and shall not be considered representative of any other installation and so shall not be used for the purpose of a
43、statistical assessment. 1.3 Procedures are given for the measurement of radio frequency disturbances and limits are laid down within the frequency range 9 kHz to 400 GHz. 1.4 Requirements for lighting apparatus are contained in EN 55015. 2 Definitions 2.1 ISM qualifies equipment or appliances design
44、ed to generate and/or use locally radio frequency energy for industrial, scientific, medical, domestic or similar purposes, excluding applications in the field of telecommunications and information technology and other applications covered by other CENELEC EMC Standards 2.2 for the purposes of this
45、publication the definitions contained in IEC 50(161) apply 2.3 electromagnetic radiation for the purposes of this publication the extended definition contained in IEC 50(161), which includes near field and induction phenomena, shall apply 2.4 the boundary of the equipment under test is defined by an
46、 imaginary straight line periphery describing a simple geometric configuration encompassing the equipment under test. All interconnecting cables shall be included within this boundary 2.5 low voltage a set of voltage levels used for the distribution of electricity and whose upper limit is 1 000 V ac
47、 rms 2.6 frequencies designated for ISM use certain frequencies are designated by the International Telecommunication Union (ITU) for use as fundamental frequencies for ISM equipment 3 National measures and frequencies designated for ISM use 3.1 The limits have been determined on a probabilistic bas
48、is taking into account the likelihood of interference. In cases of interference additional provisions may be required. 3.2 National Authorities may allow the installation and use of Class A apparatus in a domestic establishment or in an establishment connected directly to domestic electricity power
49、supplies, with whatever national measures they consider necessary. 3.3 The frequencies designated for ISM use are listed in Table Ia. In some CENELEC countries different or additional frequencies may be designated for ISM equipment. These frequencies are listed in Table Ib. The limits for terminal voltages and radiation do not apply to these ISM frequencies. If ISM equipment uses fundamental frequencies other than the ITU or nationally designated frequencies the limits for terminal voltage and radiation in this Standard apply al
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