1、BRITISH STANDARD BS 89-7:1990 EN 60051-7: 1989 IEC 51-7:1984 Direct acting indicating analogue electrical measuring instruments and their accessories Part 7: Specification for special requirements for multi-function instruments This European Standard EN 60051-7 has the status of a British Standard U
2、DC 621.317.7.037.33BS89-7:1990 This British Standard was published under the authority ofthe Board of BSI and comes intoeffect on 31August1990 BSI 08-1999 First published as BS 89 October1919 Second edition August 1926 Third edition September 1937 Fourth edition February 1954 Fifth edition March 197
3、7 Published as BS 89-7 August 1990 The following BSI references relate to the work on this standard: Committee reference PEL/13 Draft for comment 88/33512 DC ISBN 0 580 18468 4 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision th
4、is European Standard was prepared, comprises the National Committees of the following countries Austria Italy Belgium Luxemburg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date
5、of issue CommentsBS89-7:1990 BSI 08-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Foreword 2 Text of EN 60051-7 5 National appendix W Inside back coverBS89-7:1990 ii BSI 08-1999 National foreword This British Standard has been prepared under t
6、he direction of the Power Electrical Engineering Standards Policy Committee and is the English language version of EN60051-7 “Direct acting indicating analogue electrical measuring instruments and their accessories Part7: Special requirements for multi-function instruments” published by the European
7、 Committee for Electrotechnical Standardization (CENELEC). It is identical with IECpublication 51-7 published by the International Electrotechnical Commission (IEC). This Part of BS89 together with Parts 1, 2, 3, 4, 5, 6, 8 and 9 of this standard supersedes BS 89:1977, which is withdrawn. BS89 compr
8、ises the following Parts, which will be the English language version of the listed European Standards. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standa
9、rd does not of itself confer immunity from legal obligations. European Standard Corresponding Part of BS 89 EN 60051-1 Part 1 Specification for definitions and general requirements common to all Parts EN 60051-2 Part 2 Specification for special requirements for ammeters and voltmeters EN 60051-3 Par
10、t 3 Specification for special requirements for wattmeters and varmeters EN 60051-4 Part 4 Specification for special requirements for frequency meters EN 60051-5 Part 5 Specification for special requirements for phase meters, power faction meters and synchroscopes EN 60051-6 Part 6 Specification for
11、special requirements for ohmmeters (impedance meters) and conductance meters EN 60051-7 Part 7 Specification for special requirements for multi-function instruments EN 60051-8 Part 8 Specification for special requirements for accessories EN 60051-9 Part 9 Recommended test methods Summary of pages Th
12、is document comprises a front cover, an inside front cover, pagesi andii, theENtitlepage, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front
13、 cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60051-7 November 1989 UDC 621.317.7.037.33 Key words: Electrical measuring instruments; analogue indicating instruments; direct acting measuring instruments; accessories for electrical measuring instruments; multi-function measuring instrum
14、ents English version Direct acting indicating analogue electrical measuringinstruments and their accessories Part7:Special requirements for multi-function instruments (IEC 51-7 (1984) edition 4) Appareils mesureurs lectriques indicateurs analogiques action directe et leurs accessoires Septime partie
15、: Prescriptions particulires pour les appareils fonctions multiples (CEI 51-7 (1984) dition 4) Direkt wirkende anzeigende elektrische Megerte und ihr Zubehr Megerte mit Skalenanzeige Teil 7: Spezielle Anforderungen fr Vielfach-Megerte (IEC 51-7 (1984) Ausgabe 4) This European Standard was ratified b
16、y CENELEC on 11 September 1989. CENELEC members are bound to comply with the requirements of the CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alternation. Up-to-date lists and bibliographical references co
17、ncerning such national standards may be obtained on application to the CENELEC Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French and German). A version in any other language made by translation under the responsibility of a CENELE
18、C member into its own language and notified to CENELEC 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, Luxemburg, Netherlands, Norwa
19、y, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. 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 CENELEC 1989 Copyright
20、reserved to all CENELEC members Ref. No. EN 60051-7:1989 EEN60051-7:1989 BSI 08-1999 2 Brief history The text of IEC-Publication 51-7 (4th edition 1984) was submitted to the CENELEC members for unique acceptance. Technical text The text of the International Standard IEC51-7 (4th edition 1984) was ap
21、proved by CENELEC on 11September1989 as a European Standard. The following dates are applicable: Foreword 1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the National Committees having a special interest therein are represented, ex
22、press, as nearly as possible, an international consensus of opinion on the subjects dealt with. 2) They have the form of recommendations for international use and they are accepted by the National Committees in that sense. 3) In order to promote international unification, the IEC expresses the wish
23、that all National Committees should adopt the text of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the IEC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter. Prefa
24、ce This standard has been prepared by IEC Technical Committee No. 85: Measuring Equipment for Basic Electrical Quantities (former Sub-Committee13B: Electrical Measuring Instruments). This fourth edition replaces the third edition of IEC Publication51. This standard constitutes Part 7. The general la
25、yout for the revised Publication51 is as follows: Part 1: Definitions and General Requirements Common to all Parts; Part 2: Special Requirements for Ammeters and Voltmeters; Part 3: Special Requirements for Wattmeters and Varmeters; Part 4: Special Requirements for Frequency Meters; Part 5: Special
26、Requirements for Phase Meters, Power Factor Meters and Synchroscopes; Part 6: Special Requirements for Ohmmeters (Impedance Meters) and Conductance Meters; Part 7: Special Requirements for Multi-function Instruments; Part 8: Special Requirements for Accessories; Part 9: Recommended Test Methods; Par
27、ts2 to 9: are not complete in themselves and shall be read in conjunction with Part 1. All of these parts are arranged in the same format and a standard relationship between subject and clause number is maintained throughout. In addition, tables, figures and appendices add a suffix to the part numbe
28、r in order to differentiate the parts. This re-arrangement will assist the reader of IEC Publication51 to distinguish information relating to the different types of instruments. The text of this standard is based upon the following documents: Further information can be found in the Report on Voting
29、indicated in the table above. latest date of announcement of the EN at national level (doa): 1990-03-01 date of latest publication of a new harmonized standard (dop): 1990-09-01 date of withdrawal of conflicting national standards (dow): 1990-09-01 Six Months Rule Report on Voting 13B(CO)90 13B(CO)9
30、9EN60051-7:1989 BSI 08-1999 3 Contents Page Brief history 2 Foreword 2 1 Scope 5 2 Definitions 5 3 Description, classification and comliance 5 4 Reference conditions and intrinsic errors 5 5 Nominal range of use and variations 5 6 Further electrical and mechanical requirements 5 7 Constructional req
31、uirements 6 8 Information, general markings and symbols 6 9 Markings and symbols for terminals 6 10 Tests to prove compliance with this standard 64 blankEN60051-7:1989 BSI 08-1999 5 1 Scope 1.1 Part7 of the standard applies to multi-function analogue instruments as defined in Sub-clause2.1.7 of Part
32、1. 1.2 This part also applies to non-interchangeable accessories (as defined in Sub-clause2.1.15.3 of Part1) used with multi-function analogue instruments. 1.3 to1.8 SeePart1. 2 Definitions See Part1. 3 Description, classification and compliance 3.1 Description Multi-function instruments shall be de
33、scribed in accordance with the quantities which they measure, for example d.c./a.c. ammeterd.c./a.c. voltmeterohmmeter. 3.2 Classification 3.2.1 Each function of a multi-function instrument shall be classified in one of the accuracy classes denoted by the class indices as given in Sub-clause3.2 of t
34、he part relevant to that function. 3.2.2 Each function may have a different class index. D.C. and a.c. are considered to be different measuring functions as are the measurement of current and voltage. 3.2.3 Some ranges of a function may have a different class index from the other ranges. 3.3 Complia
35、nce with the requirements of this standard See Part1. 3.3.1 and3.3.2 See Part1. 3.3.3 The special requirements of the relevant Parts2 to6 apply to the various functions of a multi-function instrument. 4 Reference conditions and intrinsic errors 4.1 Reference conditions See Part1 for general requirem
36、ents and Sub-clause4.1 in the relevant part for each function for special requirements, if any. 4.2 Limits of intrinsic error; fiducial value See Part1 for general requirements and Sub-clause4.2 in the relevant part for each function for special requirements, if any. 4.2.1 Correspondence between int
37、rinsic error and accuracy class See Part 1 for general requirements and Sub-clause4.2.1 in the relevant part for each function for special requirements, if any. 4.2.2 Fiducial value The fiducial value for each function of a multi-function instrument shall be as given in Sub-clause4.2.2 of the part r
38、elevant to that function. 5 Nominal range of use and variations 5.1 Nominal range of use See Part1 and TablesII of the parts relevant to each function. 5.2 Limits of variations See Part1 for general requirements and Sub-clause5.2 of the relevant parts for each function for special requirements, if a
39、ny. 5.3 Conditions for the determination of variations See Part1 for general requirements and Sub-clause5.3 of the relevant parts for each function for special requirements, if any. 6 Further electrical and mechanical requirements 6.1 Voltage tests; insulation tests and other safety requirements See
40、 Part 1. 6.2 Damping See Part1 for general requirements and Sub-clause6.2 of the relevant parts for each function for special requirements, if any. However, if a multi-function instrument cannot meet all of the requirements of Sub-clause6.2 of Part1 on one or more ranges, the manufacturer shall mark
41、 Symbol F-33(TableIII-1) on the dial or on a part which is visible while the instrument is in use and shall give details in a separate document of the requirements which cannot be met. 6.3 Self-heating See Part 1 for general requirements and Sub-clause6.3 in the relevant part for each function for s
42、pecial requirements, if any. However, if a multi-function instrument cannot meet all of the requirements of Sub-clause6.3 of Part1 on one or more ranges, the manufacturer shall mark SymbolF-33 (TableIII-1) on the dial or on a part which is visible while the instrument is in use and shall give detail
43、s in a separate document of the requirements which cannot be met.EN60051-7:1989 6 BSI 08-1999 6.4 Permissible overloads See Part1 for general requirements and Sub-clause6.4 of the relevant parts for each function for special requirements, if any. However, if a multi-function instrument cannot meet a
44、ll of the requirements of Sub-clause6.4 of Part1 on one or more ranges, the manufacturer shall mark SymbolF-33 (TableIII-1) on the dial or on a part which is visible while the instrument is in use and shall give details in a separate document of the requirements which cannot be met. 6.5 Limiting val
45、ues of temperature See Part 1. 6.6 Deviation from zero Special requirements and tests for deviation from zero and for return to zero are given in Sub-clause6.6 of the parts relevant to each function. 7 Constructional requirements 7.1 and7.2 See Part1. 7.3 Preferred values Special requirements concer
46、ning preferred values are given in Sub-clause7.3 of the part relevant to each function. 7.4 Adjuster(s), mechanical and/or electrical SeePart1. 8 Information, general markings and symbols See Part1. However, if it is unpractical to mark on the dial all of the information that is required by Sub-clau
47、ses8.2.1 and8.2.2 of Part1, the manufacturer shall mark SymbolF-33 (TableIII-1) on the dial or on a part which is visible while the instrument is in use and shall give in a separate document the information which is not marked. 9 Markings and symbols for terminals 9.1 to9.3 See Part1 9.4 Special mar
48、kings for terminals 9.4.1 Terminals shall be clearly marked to show their function and/or range. 9.4.2 If a terminal is used as the positive terminal of a d.c. current or voltage measuring function, either it shall be marked using SymbolF-46 (+) given in TableIII-1, or the terminal and/or its immedi
49、ate surround shall be coloured red. This requirement applies no matter what its use may be with any other function. 10 Tests to prove compliance with this standard See Part1.BS89-7:1990 BSI 08-1999 National appendix W The United Kingdom participation in the preparation of this European Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to Technical Committee PEL/13 upon which the following bodies were represented: Association of Consulting Engineers Association of Supervisory
