DD-IEC-TS-62492-1-2008.pdf
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1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards WB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1 Industrial process control devices Radiation thermometers Part 1: Technical data for radiation thermometers D
2、D IEC/TS 62492-1:2008 raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:47, Uncontrolled Copy, (c) BSI National foreword This Draft for Development
3、 is the UK implementation of IEC/PAS 62008. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its p
4、ractical application can be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the international organization responsible for its conversion to an international standard. A review of this publication will be initiated not late
5、r than three years after its publication by the international organization so that a decision can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the r
6、eview period, the responsible BSI Committee will decide whether to support the conversion into an international Standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards Hous
7、e, 389 Chiswick High Road, London W4 4AL. The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of systems. A list of organizations represented on this committee can be obtained on request to its secretary. Th
8、is publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 200 ISBN 978 0 580 58686 6 ICS 17.200.20; 25.040.40 Amendments issued since publication Amd. No. Date Text affected DD IEC/TS 62492-1:2008 9 2492-1: This Draf
9、t for Development was published under the authority of the Standards Policy and Strategy Committee on 31 January 2009 Licensed Copy: London South Bank University, South Bank University, 02/02/2009 05:47, Uncontrolled Copy, (c) BSI 2 TS 62492-1 IEC:2008 CONTENTS 1 Scope.5 2 Normative references .5 3
10、Terms, definitions and abbreviations 5 3.1 Terms and definitions5 3.2 Abbreviations 7 4 Technical data8 4.1 Types of technical data .8 4.1.1 Metrological data.8 4.1.2 Equipment features .20 Annex A (informative) .21 Figure 1 Demonstration of the response time to a rising temperature step .18 Figure
11、2 Demonstration of the exposure time.19 Table 1 Measurement uncertainty (example 1).10 Table 2 Measurement uncertainty (example 2).10 Table A.1 Change in indicated temperature corresponding to a 1 % change in the radiation exchange with a radiation thermometer at 23 C 21 DD IEC/TS 62492-1:2008 Licen
12、sed Copy: London South Bank University, South Bank University, 02/02/2009 05:47, Uncontrolled Copy, (c) BSI TS 62492-1 IEC:2008 5 INDUSTRIAL PROCESS CONTROL DEVICES RADIATION THERMOMETERS Part 1: Technical data for radiation thermometers 1 Scope This Technical Specification applies to radiation ther
13、mometry. It defines the technical data, i.e. metrological data to be given in data sheets and operating instructions for radiation thermometers with one wavelength range and one measurement field, to ensure that the data and terminology are used consistently. Technical data for radiation thermometer
14、s are frequently given using terms whose meaning is not clear and therefore open to misinterpretation. Moreover, the data are given for measuring conditions which are not standardised. Often, influence parameters and mutual interdependencies of technical data are not given. As a result, the user can
15、not easily compare the technical design and performance data of radiation thermometers and tests for compliance with the manufacturers specifications are difficult to carry out. The purpose of this Technical Specification is to facilitate comparability and testability. Therefore, unambiguous definit
16、ions are stipulated for stating technical data under standardised measuring conditions. NOTE 1 Infrared ear thermometers are excluded from this Specification. NOTE 2 It is not compulsory for manufacturers and sellers of radiation thermometers to include all items given in this Specification for a sp
17、ecific type of radiation thermometer. Only the relevant data should be stated and should comply with this Specification. 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
18、 references, the latest edition of the referenced document (including any amendments) applies. Guide to the Expression of Uncertainty of Measurement (1995) BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML International Vocabulary of Basic and General Terms in Metrology (1993) BIPM, IEC, IFCC, ISO, IUPAC, IU
19、PAP, OIML 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 measuring temperature range temperature range for which the radiation thermometer is designed DD IEC/TS 62492-1:2008 Licensed Copy: London So
20、uth Bank University, South Bank University, 02/02/2009 05:47, Uncontrolled Copy, (c) BSI 6 TS 62492-1 IEC:2008 3.1.2 measurement uncertainty (accuracy) parameter, associated with the result of a measurement, that characterises the dispersion of the values that could reasonably be attributed to the m
21、easurand 3.1.3 noise equivalent temperature difference parameter which indicates the contribution of the measurement uncertainty in C, which is due to instrument noise 3.1.4 measuring distance distance or distance range between the radiation thermometer and the target (measured object) for which the
22、 radiation thermometer is designed 3.1.5 field-of-view usually circular, flat surface of a measured object from which the radiation thermometer receives radiation 3.1.6 distance ratio ratio of the measuring distance to the diameter of the field-of-view when the target is in focus 3.1.7 size-of-sourc
23、e effect difference in the radiance- or temperature reading of the radiation thermometer when changing the size of the radiating area of the observed source 3.1.8 emissivity setting the emissivity of a surface is the ratio between the radiation emitted from this surface and the radiation from a blac
24、kbody at the same temperature. The emissivity describes a thermo- physical material characteristic, which in addition to the chemical composition of the material may also be dependent on the surface structure (rough, smooth), the emission direction as well as on the observed wavelength and the tempe
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