1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Industrial platinum resistancethermometers and platinum temperature sensorsBS EN 60751:2008National forewordThis
2、British Standard is the UK implementation of EN 60751:2008. It is identical to IEC 60751:2008. It supersedes BS EN 60751:1996 which is withdrawn.The UK participation in its preparation was entrusted by Technical CommitteeGEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements ofsystems.A
3、 list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 54651 8ICS 17.200.20Compliance with a Brit
4、ish Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 October 2009Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60751:2008EUROPEAN STANDARD EN 60751 N
5、ORME EUROPENNE EUROPISCHE NORM September 2008 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 2008 CENELEC - All rights of explo
6、itation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60751:2008 E ICS 17.200.20 Supersedes EN 60751:1995 + A2:1995English version Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751:2008) Thermomtres rsistance de platine industr
7、iels et capteurs thermomtriques en platine (CEI 60751:2008) Industrielle Platin-Widerstandsthermometer und Platin-Sensoren (IEC 60751:2008) This European Standard was approved by CENELEC on 2008-08-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
8、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 may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists
9、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 to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrot
10、echnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerlan
11、d and the United Kingdom. BS EN 60751:2008EN 60751:2008 2 Foreword The text of document 65B/664/FDIS, future edition 2 of IEC 60751, prepared by SC 65B, Devices tolerance acceptance test is included; hysteresis test is included; several changes in the individual tests; appendices are deleted. The fo
12、llowing dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-05-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-08-01 Annex ZA has bee
13、n added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60751:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 60751:2008 3 EN 60751:2008 Annex ZA (normative) Normative references to international publications with their corresponding
14、European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international
15、publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 61152 (mod) - 1)Dimensions of metal-sheathed thermometer elements EN 61152 1994 2)IEC 61298-1 - 1)Process measurement and control devices - General methods and
16、 procedures for evaluating performance - Part 1: General considerations EN 61298-1 1995 2)1)Undated reference. 2) Valid edition at date of issue. BS EN 60751:2008 2 60751 IEC:2008 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Characteristics .8 4.1 Temperature/
17、resistance relationships 8 4.2 Resistance values .9 5 General requirements.12 5.1 Tolerance classes .12 5.1.1 Temperature range of validity 12 5.1.2 Resistors .12 5.1.3 Thermometers .12 5.1.4 Special tolerance classes and special temperature ranges of validity 12 5.2 Measuring current .13 5.3 Electr
18、ical supply13 5.4 Connecting wire configuration .13 6 Tests 14 6.1 General .14 6.1.1 Routine production tests14 6.1.2 Type tests .14 6.1.3 Additional type tests 14 6.2 Routine production tests for resistors 14 6.2.1 Tolerance acceptance test.14 6.3 Routine production tests for thermometers 15 6.3.1
19、Insulation resistance at ambient temperature.15 6.3.2 Sheath integrity test 15 6.3.3 Dimensional test16 6.3.4 Tolerance acceptance test.16 6.4 Type tests for resistors16 6.4.1 Tolerances 16 6.4.2 Stability at upper temperature limit 16 6.4.3 Self-heating.16 6.5 Type tests for thermometers16 6.5.1 In
20、sulation resistance at elevated temperatures 16 6.5.2 Thermal response time 18 6.5.3 Stability at upper temperature limit 18 6.5.4 Thermoelectric effect.18 6.5.5 Effect of temperature cycling .18 6.5.6 Effect of hysteresis18 6.5.7 Self-heating.18 6.5.8 Minimum immersion depth .19 6.6 Additional type
21、 tests for special applications of thermometers .19 6.6.1 Capacitance 19 6.6.2 Inductance.19 6.6.3 Dielectric strength .19 6.6.4 Vibration test .19 BS EN 60751:200860751 IEC:2008 3 6.6.5 Drop test .19 6.7 Summary of tests 19 7 Information to be made available by the manufacturer20 7.1 For resistors
22、only 20 7.2 For resistors and/or thermometers.20 8 Thermometer identification and marking .20 Figure 1 Connecting configurations13 Figure 2 Examples of test results for selecting or rejecting resistors 15 Table 1 Temperature/resistance relationship, R0= 100.00 .10 Table 2 Tolerance classes for resis
23、tors12 Table 3 Tolerance classes for thermometers12 Table 4 Minimum insulation resistance of thermometers at maximum temperature.16 Table 5 Table of tests described in this standard .20 BS EN 60751:2008 4 60751 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INDUSTRIAL PLATINUM RESISTANCE THERM
24、OMETERS AND PLATINUM TEMPERATURE SENSORS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all qu
25、estions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publicati
26、on(s)”). Their preparation is entrusted to technical committees; any IEC National 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. IEC co
27、llaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinio
28、n on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ens
29、ure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently t
30、o the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered
31、responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its te
32、chnical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other I
33、EC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the sub
34、ject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60751 has been prepared by subcommittee 65B: Devices and process analysis, of IEC technical committee 65: Industrial-process measurement, control and automation. This se
35、cond edition cancels and replaces the first edition published in 1983, amendment 1 (1986) and amendment 2 (1995). This edition constitutes a technical revision. The significant technical changes with respect to the previous edition are as follows: While the temperature/resistance relationship in 4.2
36、 remains unchanged, there are several changes in the other chapters. Most important are: tolerance classes follow a new scheme; tolerance acceptance test is included; hysteresis test is included; several changes in the individual tests; appendices are deleted. BS EN 60751:200860751 IEC:2008 5 The te
37、xt of this standard is based on the following documents: FDIS Report on voting 65B/664/FDIS 65B/683/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
38、 Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed,
39、 withdrawn, replaced by a revised edition, or amended. BS EN 60751:2008 6 60751 IEC:2008 INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS AND PLATINUM TEMPERATURE SENSORS 1 Scope This standard specifies the requirements and temperature/resistance relationship for industrial platinum resistance temperatur
40、e sensors later referred to as “platinum resistors” or “resistors“ and industrial platinum resistance thermometers later referred to as “thermometers“ whose electrical resistance is a defined function of temperature. The International Standard applies to platinum resistors whose temperature coeffici
41、ent , defined as C10000100=RRRis conventionally written as = 3.851 x 103C1, where R100is the resistance at t = 100 C and R0is the resistance at t = 0 C. Values of temperature in this standard are in terms of the International Temperature Scale of 1990, ITS-90. Temperatures in degrees Celsius are den
42、oted by the symbol t, except in Table 1 where the full nomenclature t90/C is used. The standard covers resistors or thermometers for all or part of the temperature range -200 C to +850 C with different tolerance classes, which may cover restricted temperature ranges. For temperature/resistance relat
43、ionships with uncertainties 0.2 m/s. The self-heating under the above mentioned conditions shall not exceed 25 % of the tolerance value of the declared tolerance class at the declared maximum measuring current. 6.5 Type tests for thermometers 6.5.1 Insulation resistance at elevated temperatures The
44、insulation resistance shall be tested with the thermometer being at the rated maximum temperature over at least the minimum immersion depth and a test voltage minimum of 10 V d.c. The insulation resistance between each terminal and the sheath shall not be less than indicated in Table 4. Table 4 Mini
45、mum insulation resistance of thermometers at maximum temperature Rated maximum temperature C Minimum insulation resistance M BS EN 60751:200860751 IEC:2008 17 up to 250 251 to 450 451 to 650 651 to 850 20 2 0.5 0.2 BS EN 60751:2008 18 60751 IEC:2008 6.5.2 Thermal response time The thermal response t
46、ime 0.5in flowing water with a velocity 0.2 m/s and/or in flowing air with a velocity (3 0.3) m/s shall be recorded. If requested the response times 0.9and/or 0.1may also be recorded. 6.5.3 Stability at upper temperature limit After a minimum of 4 weeks (672 h) continuously maintained at the specifi
47、ed upper temperature limit, the drift of the resistance value of the thermometer at 0 C shall be not more than the tolerance value of the declared tolerance class. The insulation resistance shall not be less than specified in 6.5.1. 6.5.4 Thermoelectric effect The thermometer shall be heated to the
48、declared maximum temperature with the thermometer terminals close to the ambient temperature. The immersion depth of the thermometer shall be varied until the EMF is at its maximum. Set the direct measuring current to the maximum permissible value and obtain resistance readings with the normal and r
49、eversed polarity of the current. The temperature equivalent of the difference between the resistance of the thermometer measured with the normal and reversed polarity of the current shall not exceed the tolerance value of the declared tolerance class. 6.5.5 Effect of temperature cycling The thermometer shall be brought carefully to the upper limit of its temperature range and then exposed to air at room temperature.
