1、BRITISH STANDARD BS EN 60523:1993 Incorporating Amendment No.1 to BS5981:1980 (renumbers the BS as BS EN60523:1993) and Amendment No.1 to BS EN60523:1993 Direct-current potentiometers The European Standard EN60523:1993 with the incorporation of amendmentA2:1997 has the status of a BritishStandard IC
2、S 17.220.20BSEN60523:1993 This BritishStandard, having been prepared under the directionof the Power ElectricalEngineering StandardsCommittee, was published under the authority ofthe Executive Board and comesinto effect on 29August1980 BSI 03-2000 ISBN 0 580 11560 7 Committees responsible for this B
3、ritishStandard The Power Electrical Engineering Standards Committee, under whose direction this BritishStandard was prepared, consists of representatives from the following: Associated Offices Technical Committee Association of Short Circuit Testing Authorities British Electrical and Allied Manufact
4、urers Association (BEAMA) British Railways Board British Steel Corporation Cbmpe Department of Energy (Electricity)* Electrical Contractors Association Electrical Contractors Association of Scotland Electricity Supply Industry in England and Wales* Era Technology Ltd. Institute of Purchasing and Sup
5、ply Institution of Electrical Engineers* Ministry of Defence* National Coal Board National Economic Development Office The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this
6、 BritishStandard: Association of Consulting Engineers Association of Supervisory and Executive Engineers British Industrial Measuring and Control Apparatus Manufacturers Association Electrical Power Engineers Association Post Office Scientific Instrument Manufacturers Association Individual expert A
7、mendments issued since publication Amd. No. Date Comments 7914 October 1993 Renumbers BS 5981 10280 March 1999 Indicated by a sideline in the marginBSEN60523:1993 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword iii Foreword 2 1 Scope 3 2 Terms and definitions
8、3 2.1 D.C. potentiometer (hereinafter designated “potentiometer”) 3 2.2 Measuring dials 3 2.3 Effective range 3 2.4 Range-changing device 3 2.5 Standardization of a potentiometer 3 2.6 Dial setting 3 2.7 Auxiliary equipment 3 2.8 Resolution 3 2.9 Circuit insulation voltage (nominal circuit voltage)
9、3 2.9a Distortion factor (total harmonic) (of a quantity) 4 2.10 Ripple content (of a quantity) 4 2.11 Leakage current screen (circuit) 4 2.12 Electrostatic screen 4 2.13 Measuring terminals 4 2.14 Measuring circuit 4 2.15 Measured quantity circuit selector switch 4 2.16 Residual e.m.f. of a potenti
10、ometer 4 2.17 Incremental linearity 4 2.18 Influence quantity 4 2.19 Common mode voltage 4 2.20 Variation with influence quantity 5 2.21 Reference conditions 5 2.22 Reference value 5 2.23 Reference range 5 2.24 Nominal range of use 5 2.25 Limiting values of an influence quantity 5 2.26 Fiducial valu
11、e 5 2.27 Error 5 2.28 Intrinsic error 5 2.29 Accuracy 5 2.30 Accuracy class 5 2.31 Class index 6 3 Classification 6 4 Limits of intrinsic error 6 4.1 Permissible limits of intrinsic error 6 4.2 Incremental linearity 6 4.3 Resolution 7 4.4 Range-changing device 7 4.5 Independent circuit for standardi
12、zation of a potentiometer 7 5 Conditions for the determination of intrinsic errors 7 6 Permissible variations 8 6.1 Limits of variation 8 6.2 Conditions for the determination of the variations 8BSEN60523:1993 ii BSI 03-2000 Page 6.3 Determination of the effect of a common mode voltage 9 6.4 Variatio
13、n due to the influence of a magnetic field of external origin 9 7 Additional electrical and mechanical requirements 9 7.1 Voltage test and other safety requirements 9 7.2 Functional insulation test 9 7.3 Measured quantity circuit selector switches 10 7.4 Potentiometer adjustments 11 7.5 Limiting tem
14、perature for storage, transport and use 11 8 Information, markings and symbols 11 8.1 Information 11 8.2 Markings, symbols and their locations 11 8.3 Documentation 12 8.4 Example of the marking of a potentiometer 12 Appendix A Determination of the effect of common mode voltage. Direct method 15 Appe
15、ndix B Determination of the effect of common mode voltage. Indirectmethod (Superposition method) 16 Table I Reference conditions and tolerances of the influence quantities 8 Table II Limits of the nominal range of use and permissible variations 10 Table III Minimum values of insulation resistance 10
16、 Table IV Symbols for marking potentiometers 14 Publications referred to Inside back coverBSEN60523:1993 BSI 03-2000 iii National foreword This BritishStandard has been prepared by Technical CommitteePEL/85 (formerly PEL/13) and is the English language version of EN60523:1993 including amendment A2:
17、1997. It is identical with IEC523:1975 including amendment1:1979, corrigendum1980 and amendment2:1997. Editorial note. The incorporation of this amendment has involved some rearrangement of the original pagination; for this reason, the normal convention of quoting IEC page numbers in square brackets
18、 at the foot of each page has not been adopted. Terminology and conventions. The text of the International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in BritishStandards.
19、 Textual note. There is an abbreviation specified in IEC61010-1 amendment2 for pollution degree. Suggested abbreviation “PD” has been used. The BritishStandards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the s
20、ection entitled “International Standards Correspondence Index” or by using the “Find” facility of the BSI Standards Electronic Catalogue. Additional information. With reference to subclause2.9 “Circuit insulation voltage (nominal circuit voltage)”, attention is drawn to the notes on circuit insulati
21、on voltage in the Appendix of BS5458:1977(IEC414:1973). 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 Standard does not of itself confer immunity from lega
22、l obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, theENtitle page, pages2 to16, 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
23、amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60523 April1993 +A2 November1997 UDC 621.317.727.2:621.3.024 SupersedesHD613S1:1992 Descriptors: Measuring instrument, electrical measuring instrument, potentiometer, direct current potentiometer E
24、nglish version Direct-current potentiometers (includes amendmentA2:1997) (IEC523:1975+A1:1979+corrigendum1980+A2:1997) Potentiomtres courant continu (Inclut lamendement A2:1997) (CEI523:1975+A1:1979 +Corrigendum1980+A2:1997) Gleichspannungs-Kompensatoren (Enthlt nderungA2:1997) (IEC523:1975+A1:1979
25、+Corrigendum1980+A2:1997) This European Standard was approved by CENELEC on1993-03-09; amendmentA2 was approved by CENELEC on1997-10-01. 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 nati
26、onal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards 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 i
27、n any other language made by translation under the responsibility of a CENELEC member into its own language and notified 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
28、, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Centr
29、al Secretariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref.No.EN60523:1993+A1:1997EEN60523:1993 BSI 03-2000 2 Foreword At the request of72 Technical Board, HD613S1:1992 (IEC523:1975+A1:1979 +corrigendum December1980) was submitted to the CENELEC voting procedu
30、re for conversion into a European Standard. The text of the International Standard was approved by CENELEC as EN60523 on9March1993. The following dates were fixed: Foreword to amendment A2 The text of document85/168/FDIS, future amendment2 to IEC60523:1975, prepared by IECTC85, Measuring equipment f
31、or electromagnetic quantities, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendmentA2 to EN60523:1993 on1997-10-01. The following dates were fixed: latest date of publication of an identical national standard (dop) 1994-03-01 latest date of withdrawal of conflictin
32、g national standards (dow) latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-07-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 1998-07-01EN
33、60523:1993 BSI 03-2000 3 1 Scope This standard applies to d.c. potentiometers having accuracy classes of0.0001 . 0.11ppm . 1000ppm (parts per million) 1 10 6. 1 10 3 (scientific notation). It applies also to auxiliary equipment which is a built-in part of the potentiometer. This standard does not ap
34、ply to potentiometers in which the null balance is obtained automatically, to those which employ graduations on a balance detector to obtain a part of the indicated value, nor to external auxiliary equipment used with the potentiometer. 2 Terms and definitions For the purposes of this standard, the
35、following definitions apply. 2.1 D.C. potentiometer (hereinafter designated “potentiometer”) a voltage-measuring instrument in which the voltage to be measured is balanced against a known voltage obtained by passing a fixed current through an adjustable resistor or an adjustable current through a fi
36、xed resistor, or any combination thereof 2.2 measuring dials the dials from which, taking into account the range factor, if any, the value of the measured quantity is determined 2.3 effective range for a specified range factor, the range of dial settings for which the potentiometer can measure with
37、the stated accuracy 2.4 range-changing device a device whereby the effective range may be multiplied by a factor (e.g.0.1) which is known as the range factor 2.5 standardization of a potentiometer adjustment(s) necessary to ensure that a potentiometer is set correctly for measurement 2.6 dial settin
38、g the setting of the measuring dials after balancing the potentiometer, multiplied by the range factor, if applicable, when determining a measured voltage, after standardization of the potentiometer 2.7 auxiliary equipment additional equipment, which is or is not an integral part of the potentiomete
39、r, necessary to enable the potentiometer to operate accurately and safely as specified 2.8 resolution the voltage corresponding to either one step or the smallest division on the measuring dial of lowest value 2.9 circuit insulation voltage (nominal circuit voltage) the highest voltage with respect
40、to earth which may be applied to a circuit(s) of the potentiometer so that the potentiometer is unlikely to become dangerous to touch NOTEAuxiliary circuit(s) (if any) may have different value(s) of circuit insulation voltage (nominal circuit voltage).EN60523:1993 4 BSI 03-2000 2.9a distortion facto
41、r (total harmonic) (of a quantity) 2.10 ripple content (of a quantity) 2.11 leakage current screen (circuit) a conductive path which prevents leakage currents from affecting the results of measurements 2.12 electrostatic screen an electrically conductive enclosure or coating intended to protect the
42、enclosed space from external electrostatic influences 2.13 measuring terminals the terminals to which the circuit of the voltage to be measured is intended to be connected 2.14 measuring circuit the internal circuit of the potentiometer which is (or can be) conductively connected to the measuring te
43、rminals 2.15 measured quantity circuit selector switch the switch which selects the set of measuring terminals to be connected to the measuring circuit 2.16 residual e.m.f. of a potentiometer the open circuit voltage present at the measuring terminals due to the potentiometer itself when it is opera
44、tional and its measuring dials are set to zero 2.17 incremental linearity the overall linearity of a potentiometer is characterized by both of the following aspects: a) constancy of the developed voltage for any two different settings of the measuring dials, each setting indicating the same value. b
45、) constancy of incremental voltage developed between adjacent settings of any one measuring dial. 2.18 influence quantity a quantity, other than the measured quantity, which is liable to cause unwanted variation in the dial setting 2.19 common mode voltage a voltage which exists between one of the m
46、easuring terminals (called the reference terminal of common mode voltage) and the earth terminal, or the leakage current screen terminal, or the electrostatic screen terminal, separately or collectively (as specified) a Without fundamental. The ratio: r.m.s. value of the harmonic content a r.m.s. va
47、lue of the non-sinusoidal quantity - The ratio: r.m.s. value of the fluctuating component value of the d.c. component -EN60523:1993 BSI 03-2000 5 2.20 variation with influence quantity the difference between two measured values for the same measured quantity when an influence quantity assumes succes
48、sively two different specified values 2.21 reference conditions the specified conditions under which the potentiometer meets the requirements concerning intrinsic errors 2.22 reference value a specified single value of an influence quantity at which, within the stated tolerance, the potentiometer me
49、ets the requirements concerning intrinsic errors 2.23 reference range a specified range of values of an influence quantity within which the potentiometer meets the requirements concerning intrinsic errors 2.24 nominal range of use a specified range of values which each influence quantity can assume without c
