IEC 60751-2008 Industrial platinium resistance thermometer and platinum temperature sensors《工业铂电阻温度计和铂温度敏感器》.pdf

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1、 IEC 60751Edition 2.0 2008-07INTERNATIONAL STANDARD NORME INTERNATIONALEIndustrial platinum resistance thermometers and platinum temperature sensors Thermomtres rsistance de platine industriels et capteurs thermomtriques en platine IEC60751:2008THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008

2、IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Commi

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16、 02 11 Fax: +41 22 919 03 00 IEC 60751Edition 2.0 2008-07INTERNATIONAL STANDARD NORME INTERNATIONALEIndustrial platinum resistance thermometers and platinum temperature sensors Thermomtres rsistance de platine industriels et capteurs thermomtriques en platine INTERNATIONAL ELECTROTECHNICAL COMMISSIO

17、N COMMISSION ELECTROTECHNIQUE INTERNATIONALE SICS 17.200.20 PRICE CODECODE PRIXISBN 2-8318-9849-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60751 IEC:2008 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references

18、.6 3 Terms and definitions .6 4 Characteristics .8 4.1 Temperature/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 tem

19、perature ranges of validity 12 5.2 Measuring current .13 5.3 Electrical 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 accepta

20、nce test.14 6.3 Routine production tests for thermometers 15 6.3.1 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

21、16 6.4.3 Self-heating.16 6.5 Type tests for thermometers16 6.5.1 Insulation 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 Se

22、lf-heating.18 6.5.8 Minimum immersion depth .19 6.6 Additional type 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 60751 IEC:2008 3 6.6.5 Drop test .19 6.7 Summary of tests 19 7 Information to be made

23、 available by the manufacturer20 7.1 For resistors 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,

24、 R0= 100.00 .10 Table 2 Tolerance classes for resistors12 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 4 60751 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ IN

25、DUSTRIAL PLATINUM RESISTANCE THERMOMETERS 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 in

26、ternational co-operation on all questions 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 (herea

27、fter referred to as “IEC Publication(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 parti

28、cipate in this preparation. IEC collaborates 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

29、 international consensus of opinion 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

30、reasonable efforts are made to ensure 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 appl

31、y IEC Publications transparently to 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 it

32、s approval and cannot be rendered 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 indivi

33、dual experts and members of its technical 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, t

34、his IEC Publication or any other IEC 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 t

35、his IEC Publication may be the subject 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 measuremen

36、t, control and automation. This second 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 temperat

37、ure/resistance relationship in 4.2 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. 60751

38、 IEC:2008 5 The text 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 accordanc

39、e with the ISO/IEC 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 wi

40、ll be reconfirmed, withdrawn, replaced by a revised edition, or amended. 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 temperatu

41、re 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 coeffic

42、ient , 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 de

43、noted 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 rela

44、tionships 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

45、 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 Min

46、imum insulation resistance of thermometers at maximum temperature Rated maximum temperature C Minimum insulation resistance M 60751 IEC:2008 17 up to 250 251 to 450 451 to 650 651 to 850 20 2 0.5 0.2 18 60751 IEC:2008 6.5.2 Thermal response time The thermal response time 0.5in flowing water with a v

47、elocity 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 specified upper temperature limit, the

48、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 declared maximum temperature wit

49、h 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 reversed polarity of the current. The temperature equivalent of the difference between the resistance of the thermom