1、BRITISH STANDARD BS89-6:1990 EN60051-6: 1989 IEC51-6:1984 Direct acting indicating analogue electrical measuring instruments and their accessories Part 6: Specification for special requirements for ohmmeters (impedance meters) and conductance meters This European Standard EN60051-6 has the status of
2、 a British Standard UDC 621.317.73.037.33:620.1BS89-6:1990 This British Standard, was published under the authority ofthe Board of BSI and comes intoeffect on31 August1990 BSI07-1999 First published, as BS89, October1919 Second August1926 Third edition September1937 Fourth edition February1954 Fifth
3、 edition March1977 Published, as BS89-6, August1990 The following BSI references relate to the work on this standard: Committee referencePEL/13 Draft for comment88/33511DC ISBN 0 580 18467 6 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose
4、supervision this 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 UnitedKingdom Amendments issued since publication
5、Amd. No. Date of issue CommentsBS89-6:1990 BSI 07-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Brief history 2 Text of EN 60051-5 5 National appendix W Inside back coverBS89-6:1990 ii BSI 07-1999 National foreword This British Standard has been pr
6、epared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version of EN60051-6 “Direct acting indicating analogue electrical measuring instruments and their accessories Part6: Special requirements for ohmmeters (impedance meters) and conduc
7、tance meters, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC publication51-6 published by the International Electrotechnical Commission (IEC). This Part of BS89 together with Parts1,2,3,4,5,7,8 and9 of this Standard supersedes BS89:1977,
8、which is withdrawn. BS89 comprises 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. Co
9、mpliance with a British Standard does not of itself confer immunity from legal obligations. European Standard Corresponding Part of BS89 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
10、and voltmeters EN 60051-3 Part 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 6005
11、1-6 Part 6 Specification for 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 tes
12、t methods Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to8, 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 amen
13、dment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60051-5 November 1989 UDC 621.317.73.037.33:620.1 Key words: Electrical measuring instruments; analogue indicating instruments; direct acting measuring instruments; accessories for electrical measuring instrum
14、ents; ohmmeters; impedance meters; conductance meters English version Direct acting indicating analogue electrical measuring instruments and their accessories Part 6: Special requirements for ohmmeters (impedancemeters) and conductance meters (IEC 51-6:1984: edition4) Appareils mesureurs lectriques
15、indicateurs analogiques action directe et leurs accessoires Sixime partie: Prescriptions particulires pour les ohmmtres (les impdancemtres) et les conductancemtres (CEI51-6:1984: dition4) Direkt wirkende anzeigende elektrische Megerte und ihr Zebehr Megerte mit Skalenanzeige Teil6: Spezielle Anforde
16、rungen fr Widerstands (Scheinwiderstands -) und Leitfhigkeits-Megerte (IEC51-6:1984: Ausgabe4) This European Standard was ratified by CENELEC on11 September1989. CENELEC members are bound to comply with the requirements of the CENELEC Internal Regulations which stipulate the conditions for giving th
17、is European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CENELEC Central Secretariat or to any CENELEC member. This European Standard exists in three officia
18、l versions (English, French and German). A version in any other language made by translation under the responsibility of a CENELEC 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
19、committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique
20、Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels CENELEC1989 Copyright reserved to all CENELEC members Ref. No. EN60051-6:1989 EEN60051-6:1989 BSI 07-1999 2 Brief history The text of IEC-Publication51-6 (4th edition 1984) was submitted to the
21、CENELEC members for unique acceptance. Technical text The text of the International Standard IEC51-6(4th edition 1984) was approved by CENELEC on11 September1989 as a EuropeanStandard. The following dates are applicable: Foreword 1) The formal decisions or agreements of the IEC on technical matters,
22、 prepared by Technical Committees on which all the National Committees having a special interest therein are represented, express, 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 acce
23、pted by the National Committees in that sense. 3) In order to promote international unification, the IEC expresses the wish 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 I
24、EC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter. Preface This standard has been prepared by IEC Technical Committee No.85: Measuring Equipment for Basic Electrical Quantities (former Sub-Committee13B: Electrical Measuring Instrume
25、nts). This fourth edition replaces the third edition of IEC Publication51. This standard constitues Part6. The general layout 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
26、3: Special Requirements for Wattmeters and Varmeters; Part 4: Special Requirements for Frequency Meters; Part 5: Special Requirements for Phase Meters, Power Factor Meters and Synchroscopes; Part 6: Special Requirements for Ohmmeters (Impedance Meters) and Conductance Meters; Part 7: Special Require
27、ments for Multi-function Instruments; Part 8: Special Requirements for Accessories; Part 9: Recommended Test Methods. Parts2 to9 are not complete in themselves and shall be read in conjunction with Part1. All of these parts are arranged in the same format and a standard relationship between subject
28、and clause number is maintained throughout. In addition, tables, figures and appendices add a suffix to the part number 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
29、text of this standard is based upon the following documents: Further information can be found in the Report on Voting 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 da
30、te of withdrawal of conflicting national standards (dow) : 1990-09-01 Six Months Rule Report on Voting 13B(CO)89 13B(CO)98EN60051-6:1989 BSI 07-1999 3 Contents Page Brief history 2 Foreword 2 1 Scope 5 2 Definitions 5 3 Description, classification and compliance 5 4 Reference conditions and intrinsi
31、c errors 5 5 Nominal range of use and variations 5 6 Further electrical and mechanical requirements 6 7 Constructional requirements 6 8 Information, general markings and symbols 6 9 Markings and symbols for terminals 6 10 Tests to prove compliance with this standard 7 Appendix A-6 Suggestions for ro
32、utine tests 84 blankEN60051-6:1989 BSI 07-1999 5 1 Scope 1.1 to 1.8 See Part1. 1.9 Part6 of the standard does not apply to resistivity meters (specific resistance meters), insulation resistance meters used in energized circuits or conductivity meters (specific conductance meters). 2 Definitions See
33、Part1. 3 Description, classification and compliance 3.1 Description Ohmmeters shall be described: 3.1.1 According to their method of operation as given in Sub-clause 2.2 of Part1. 3.1.2 According to whether they measure resistance values by a two-terminal or a four-terminal method. 3.1.3 According t
34、o whether they have a linear scale or a non-linear scale. 3.2 Classification Ohmmeters shall be classified in one of the accuracy classes denoted by the following class indices: 0.05, 0.1, 0.2, 0.5, 1, 1.5, 2, 2.5, 3, 5, 10, 20. 3.3 Compliance with the requirements of this standard 3.3.1 and 3.3.2 S
35、ee Part1. 3.3.3 For impedance meters and for instruments not scaled in units of resistance or conductance, the manufacturers instructions shall be followed. 4 Reference conditions and intrinsic errors 4.1 Reference conditions 4.1.1 to 4.1.3 See Part1. 4.1.4 The requirements of Table I-1 concerning r
36、ipple, distortion, peak-factor and frequency do not apply to ohmmeters. 4.2 Limits of intrinsic error: fiducial value See Part1. 4.2.1 Correspondance between intrinsic error and accuracy class See Part1. 4.2.2 Fiducial value The fiducial value for an ohmmeter corresponds to: 4.2.2.1 The indicated va
37、lue for non-linear scale ohmmeters. The class index is marked using Symbol E-3 given in Table III-1 (see Part1, Clause 8). 4.2.2.2 The span for linear scale ohmmeters. The class index is marked using Symbol E-10 given in Table III-1 (see Part 1, Clause 8). 4.3 Rated values 4.3.1 When a rated voltage
38、 is stated, the open circuit voltage at the measuring terminals shall not differ from the rated voltage by more than10% of the rated voltage. 4.3.2 When a rated voltage across a given value of test resistance is stated, the voltage shall not differ from the rated voltage by more than10% of the rated
39、 voltage. 4.3.3 When a maximum (or a minimum) value is stated, it shall not exceed (or be less than) the stated voltage at any permissible supply voltage and at any setting of the controls and adjustments which are accessible to the user. 4.3.4 When a rated, maximum or minimum current is stated, the
40、 requirements of Sub-clauses4.3.1 to4.3.3 shall apply, substituting current for voltage. 5 Nominal range of use and variations 5.1 Nominal range of use 5.1.1 and 5.1.2 See Part1. 5.1.3 The requirements of Table II-1 concerning ripple, distortion, peak-factor and frequency do not apply to ohmmeters.
41、5.2 Limits of variations See Part1. 5.2.1 to 5.2.4 See Part1. 5.2.5 Ohmmeters which employ batteries shall operate correctly with the batteries having any value of voltage and internal resistance within the ranges stated by the manufacturer. When the preliminary adjustments specified by the manufact
42、urer have been carried out, any variations caused by changes of the battery characteristics shall not cause the instrument to indicate outside its accuracy class. 5.3 Conditions for the determination of variations 5.3.1 and 5.3.2 See Part1. 5.3.3 The variations of ohmmeters intended for intermittent
43、 use shall be determined immediately after pre-conditioning, if any.EN60051-6:1989 6 BSI 07-1999 6 Further electrical and mechanical requirements 6.1 Voltage tests, insulation tests and other safety requirements See Part1. 6.2 Damping The requirements of Part1 do not apply to ohmmeters. 6.3 Self-hea
44、ting For the recommended test, see Part9, Sub-clause 4.14. 6.3.1 to 6.3.3 The requirements of Part1 do not apply to ohmmeters. 6.3.4 See Part 1. 6.3.5 Ohmmeters intended for continuous use shall comply with their accuracy requirements after being connected to an open circuit for any time after the c
45、ompletion of the specified pre-conditioning period, if any. They shall similarly comply with their accuracy requirements after being connected to a short circuit. 6.3.6 The requirements of Sub-clause6.3.5 also apply to ohmmeters intended for intermittent use except that the time after connection sha
46、ll be up to30s for ohmmeters having hand-driven rotary generators and up to5min for all other ohmmeters intended for intermittent use. 6.4 Permissible overloads The requirements of Part1 do not apply to ohmmeters. 6.5 Limiting values of temperature See Part1. 6.6 Deviation from zero There are no req
47、uirements relating to deviation from zero for ohmmeters. 7 Constructional requirements 7.1 Sealing to prevent access See Part1. 7.2 Scales 7.2.1 and 7.2.2 See Part1. 7.2.3 Direction of deflection The direction of deflection for ohmmeters is not specified. 7.2.4 Limits of the measuring range 7.2.4.1
48、to 7.2.4.3 See Part1. 7.2.4.4 For ohmmeters with non-linear scales, the method of identifying the limits of the measuring range by the omission of subdivisions outside the measuring range (Figure 1-1) shall not be used. 7.2.4.5 The measuring range shall correspond to at least50% of the scale length.
49、 7.3 Preferred values To be agreed between manufacturer and user. 7.4 Adjuster(s), mechanical and/or electrical See Part1. 7.5 Effects of vibration and shock See Part1. 8 Information, general markings and symbols 8.1 Information See Part1. 8.1.1 The open-circuit voltage or the voltage across a test resistance of given value and the short-circuit current are rated values and shall be stated as required by Item e) of Sub-clause 8.1 in Part1. 8.2 and 8.3 See Part1. 9 Markings and symbols for terminals 9.1 to 9.3 See Part1
