IEC+60751-2008－工业铂电阻标准

IEC 60751 Edition 2.0 2008-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial platinum resistance thermometers and platinum temperature sensors Thermomètres à résistance de platine industriels et capteurs thermométriques en platine IE C 6 07 51 :2 00 8 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright © 2008 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 IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction réservés. 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Egalement appelé Vocabulaire Electrotechnique International en ligne. ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csc@iec.ch Tél.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60751 Edition 2.0 2008-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial platinum resistance thermometers and platinum temperature sensors Thermomètres à résistance de platine industriels et capteurs thermométriques en platine INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE S ICS 17.200.20 PRICE CODE CODE PRIX ISBN 2-8318-9849-8 ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale – 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/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 Electrical supply ....................................................................................................13 5.4 Connecting wire configuration ............................................................................... 13 6 Tests .............................................................................................................................. 14 6.1 General .................................................................................................................14 6.1.1 Routine production tests ............................................................................14 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 Insulation resistance at ambient temperature............................................. 15 6.3.2 Sheath integrity test ..................................................................................15 6.3.3 Dimensional test ........................................................................................16 6.3.4 Tolerance acceptance test ......................................................................... 16 6.4 Type tests for resistors ..........................................................................................16 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 thermometers .................................................................................. 16 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 hysteresis .................................................................................... 18 6.5.7 Self-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 available by the manufacturer .................................................... 20 7.1 For resistors only ..................................................................................................20 7.2 For resistors and/or thermometers......................................................................... 20 8 Thermometer identification and marking ......................................................................... 20 Figure 1 – Connecting configurations .................................................................................... 13 Figure 2 – Examples of test results for selecting or rejecting resistors.. ................................ 15 Table 1 – Temperature/resistance relationship, R0 = 100.00 Ω .............................................10 Table 2 – Tolerance classes for resistors .............................................................................. 12 Table 3 – Tolerance classes for thermometers ......................................................................12 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 ____________ INDUSTRIAL 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 international 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 (hereafter 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 participate 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 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 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 apply 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 its 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 individual 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, this 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 this 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 measurement, 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 temperature/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 © 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 accordance 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 will 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 temperature 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 coefficient α, defined as C1000 0100 °⋅ − = R RR α is conventionally written as α = 3.851 x 10–3 °C–1, where R100 is the resistance at t = 100 °C and R0 is 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 denoted 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 relationships with uncertainties <0,1 °C, which are possible only for resistors or thermometers with exceptionally high stability and individual calibration, a more complex interpolation equation than is presented in this standard may be necessary. The specification of such equations is outside the scope of this standard. 2 Normative references 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:. IEC 61152, Dimensions of metal-sheathed thermometer elements IEC 61298-1, Process Measurement and Control devices – General Methods and Procedures for Evaluating Performance – Part 1: General considerations 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 dielectric strength maximum voltage between all parts of the electric circuit and the sheath of the thermometer or, in the case of a thermometer with two or more sensing circuits, between two individual 60751 © IEC:2008 – 7 – circuits which the thermometer can withstand without damage. The measurement conditions for d.c and a.c (with frequency) have to be specified. 3.2 insulation resistance electrical resistance measured between any part of the electric circuit and the sheath at ambient or elevated temperatures and with a sp