1、 IEC/TR 62732 Edition 1.0 2012-01 TECHNICAL REPORT Three-digit code for designation of colour rendering and correlated colour temperature IEC/TR 62732:2012(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of t
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8、 Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC/TR 62732 Edition 1.0 2012-01 TECHNICAL REPORT Three-digit code for designation of colour rendering and correl
9、ated colour temperature INTERNATIONAL ELECTROTECHNICAL COMMISSION F ICS 29.140 PRICE CODE ISBN 978-2-88912-868-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 TR 62732 IEC:2012(E) CONTENTS
10、 FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Construction of the code . 6 3.1 General . 6 3.2 Digit x 6 3.3 Digits yy 6 3.4 Example 6 TR 62732 IEC:2012(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ THREE-DIGIT CODE FOR DESIGNATION OF COLOUR RENDERING AND CORRELATED COLO
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22、may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC/TR 62732, which is a technical report, has been prepared by subcommittee 34A: Lamps, of IEC technic
23、al committee 34: Lamps and related equipment. 4 TR 62732 IEC:2012(E) The text of this technical report is based on the following documents: Enquiry draft Report on voting 34A/1495/DTR 34A/1530/RVC Full information on the voting for the approval of this technical report can be found in the report on
24、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 stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the
25、data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this technical report may be issued at a later date. TR 62732 IEC:2012(E) 5 INTRODUCTION This Technical Report addresses the well-
26、established means of communicating in a short form approximate values of the general colour rendering index (CRI) and the correlated colour temperature (CCT). 6 TR 62732 IEC:2012(E) THREE-DIGIT CODE FOR DESIGNATION OF COLOUR RENDERING AND CORRELATED COLOUR TEMPERATURE 1 Scope This Technical Report d
27、escribes how to construct a three-digit code, representing a shorthand string combining the nominal general colour rendering index and the nominal correlated colour temperature. NOTE The code is established in industry and commerce. 2 Normative references The following documents, in whole or in part
28、, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61231:2010, International lamp coding system (I
29、LCOS) 3 Construction of the code 3.1 General The three-digit code xyy, with x = digit for general colour rendering index and yy = digits for the correlated colour temperature, is to be understood as described in 3.2 and 3.3. 3.2 Digit x The general colour rendering index (CRI) nominal value of the l
30、amp is expressed as one figure which is obtained by using the intervals: CRI = 70 to 79 code “7” CRI = 80 to 89 code “8” CRI = 90 code “9” The highest code is 9. Values below code 7 shall be deduced by analogy. 3.3 Digits yy Divide the nominal value of the correlated colour temperature (CCT) of the
31、lamp by 100 and round off the resulting figure to the next integer number (see 5.3.3 of IEC 61231:2010). The calculation method is valid for CCTs smaller than 10 000 K. 3.4 Example Three-digit code 830 means: CRI 80 (77 to 86), nominal CCT 3 000 K _ INTERNATIONAL ELECTROTECHNICAL COMMISSION 3, rue de Varemb PO Box 131 CH-1211 Geneva 20 Switzerland Tel: + 41 22 919 02 11 Fax: + 41 22 919 03 00 infoiec.ch www.iec.ch
