ANSI NEMA C78.376-2014 Electric Lamps Specifications for the Chromaticity of Fluorescent Lamps.pdf

《ANSI NEMA C78.376-2014 Electric Lamps Specifications for the Chromaticity of Fluorescent Lamps.pdf》由会员分享，可在线阅读，更多相关《ANSI NEMA C78.376-2014 Electric Lamps Specifications for the Chromaticity of Fluorescent Lamps.pdf（15页珍藏版）》请在麦多课文档分享上搜索。

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C78.376-2014Electric Lamps - Specifications for theChromaticity ofFluorescent LampsANSI C78.376-2014 American National Standard for Electric Lamps Specifications for the Chromaticity of Fluorescent Lamps Secretariat: Nationa

2、l Electrical Manufacturers Association Approved December 15, 2014 American National Standards Institute, Inc. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it

3、was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. American National Standards Institute, Inc. (ANSI) standards and guideline publications, of which the document contained herein is one, are devel

4、oped through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the developme

5、nt of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property,

6、 or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or

7、 completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by v

8、irtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this do

9、cument should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other so

10、urces, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for

11、safety or health purposes. Any certification or other statement of compliance with any health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. 2014 National Electrical Manufacturers Associat

12、ion ANSI C78.376-2014 AMERICAN NATIONAL STANDARD Approval of an American National Standard requires verification by the American National Standards Institute, Inc. (ANSI) that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Conse

13、nsus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means significantly more than a simple majority, but not necessarily unanimity. Consensus requires that all vie

14、ws and objections be considered, and a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether they have approved the standards or not, from: manufacturing, marketing, purchasin

15、g, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute, Inc., does not develop standards, and will under no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority

16、 to issue an interpretation of an American National Standard in the name of the American National Standards Institute, Inc. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. Caution Notice: This American National Sta

17、ndard may be revised or withdrawn at any time. The procedures of the American National Standards Institute, Inc., require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by ca

18、lling or writing the American National Standards Institute, Inc. Published by National Electrical Manufacturers Association 1300 North 17th Street, Suite 900, Rosslyn, VA 22209 2014 National Electrical Manufacturers Association. All rights, including translation into other languages, reserved under

19、the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American copyright conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior writt

20、en permission of the publisher. Printed in the United States of America 2014 National Electrical Manufacturers Association i ANSI C78.376-2014 Foreword (This foreword is not part of ANSI C78.376-2014.) This is a revised standard recently updated by American National Standards Committee C78 on Electr

21、ic Lamps. Suggestions for improvement of this standard are welcome. They should be sent to: Secretary, ASC C78 National Electrical Manufacturers Association 1300 North 17thStreet, Suite 900 Rosslyn, Virginia 22209 This standard was developed and approved for submittal to ANSI by Accredited Standards

22、 Committee C78 on Electric Lamps and its Working Group, C78WG02. Approval of this standard is not meant to imply that all Accredited Standards Committee members voted to approve it. This revision modifies specifications for the chromaticity of fluorescent lamps in ANSI C78.376-2001. It updates and p

23、artially harmonizes this ANSI standard with the IEC chromaticity color point objectives and chromaticity tolerance in IEC60081, Annex D. The major changes: a) The color chromaticity mean shall be within a 4-step MacAdam ellipse of the objective chromaticity. b) 95% of samples shall be within a 5-ste

24、p MacAdam ellipse of the objective chromaticity. c) The 3500K objective chromaticity shall be changed to the IEC 3500K objective chromaticity. ii 2014 National Electrical Manufacturers Association ANSI C78.376-2014 Contents Foreword . ii 1 Scope 1 2 Color Specification Basis . 1 3 Nominal Color Temp

25、erature . 1 4 Objective Chromaticities 1 5 Chromaticity Tolerances 1 6 Color Rendering Index (Ra) 2 6.1 Definition . 2 6.2 Measurement 2 6.3 Specification 2 7 Effective Date. 2 Figures Figure 1 2700K Chromaticity Limits 3 Figure 2 3000K Chromaticity Limits 3 Figure 3 3500K Chromaticity Limits 4 Figu

26、re 4 4000K/4100K Chromaticity Limits 4 Figure 5 5000K Chromaticity Limits 5 Figure 6 6500K Chromaticity Limits 5 Tables Table 1 Objective Chromaticities. 1 Table 2 Data for Construction of Ellipses 2 2014 National Electrical Manufacturers Association iii ANSI C78.376-2014 iv 2014 National Electrical

27、 Manufacturers Association ANSI C78.376 - 2014 1 Scope This standard covers the objectives and tolerances for the chromaticity of fluorescent lamps at their normal 100 hour rating point. The colors included are 2700K, 3000 K/warm white, 3500K/white, 4000K/4100K/cool white, 5000K, and 6500K/daylight.

28、 The lamp under test shall be operated under reference conditions as specified in ANSI C78.375, Guide for Operation of Fluorescent Lamps, and in the relevant C78 lamp standard. For lamps with non-standardized chromaticity coordinates, the rated x and y values shall be assigned by the manufacturer or

29、 responsible vendor. 2 Color Specification Basis The x and y coordinates used in this specification are based on the 1931 CIE1Chromaticity Diagram. Lamps shall be rated in terms of the measurements standards established by the National Institute of Standards and Technology. Tolerances are based on t

30、he ellipses defined by David L. MacAdam in his paper “Specification of Small Chromaticity Differences,” printed in Journal of the Optical Society of America, Vol. 33, No. 1, January 1943, pp. 18-26. 3 Nominal Color Temperature Values of correlated color temperature (CCT) will vary within a chromatic

31、ity tolerance ellipse, since they are a function of color coordinates. For colors that are designated by nominal color temperature, the value shall be based on the CCT of the objective chromaticity. For new colors, the nominal value of the color temperature shall differ from the CCT of the objective

32、 chromaticity by less than 100 K. For a color with a nominal color temperature generally established prior to this standard, the value may be retained when it differs from the CCT of the objective chromaticity by a slightly greater amount. 4 Objective Chromaticities The objective chromaticities are

33、shown in Table 1. Table 1 Objective Chromaticities x y 2700K 0.459 0.412 3000K/Warm White 0.440 0.403 3500K 0.409 0.394 4000K/4100K/Cool White 0.380 0.380 5000K 0.346 0.359 6500K/Daylight 0.313 0.337 5 Chromaticity Tolerances For lamps covered by this standard, the distribution of chromaticity coord

34、inates from a representative production sample shall meet the following criteria: a) Mean of the sample shall be within a 4-step MacAdam ellipse of the objective chromaticity. b) 95% of samples shall be within a 5-step MacAdam ellipse of the objective chromaticity. 1International Committee on Illumi

35、nation 2014 National Electrical Manufacturers Association 1 ANSI C78.376-2014 The ellipses are shown in figures 1 through 6. In the construction of these ellipses, the data shown in Table 2 are used. The values of g11, 2g12, and g22are taken from MacAdams paper referred to above. They are the basis

36、for calculating , a, and b. is the angle between the major axis of the ellipse and the x axis. a and b are major and minor semi-axis of a 1-step ellipse, respectively. Table 2 Data for Construction of Ellipses g112g12g22 a b 2700K 40 x 104-39 x 10428 x 10453 42 0.00270 0.00140 3000K/Warm White 39 x

37、104-39 x 10427.5 x 10453 13 0.00278 0.00136 3500K/White 38 x 104-40 x 10425 x 10452 580.00317 0.00139 4000K/4100K/Cool White 39.5 x 104-43 x 10426 x 10453 43 0.00313 0.00134 5000K 56 x 104-50 x 10428 x 10459 37 0.00274 0.00118 6500K/Daylight 86 x 104-80 x 10445 x 10458 34 0.00223 0.00095 6 Color Ren

38、dering Index (Ra) 6.1 Definition The Color Rendering Index, or CRI, is the measurement of degree of color shift objects undergo when illuminated by a reference source of comparable color temperature. It is abbreviated Ra. 6.2 Measurement The value for CRI for a given lamp shall be determined in acco

39、rdance with the method specified in CIE Publication 13.3. The required spectroradiometric measurement shall be conducted in accordance with methods given in IESNA LM-58. 6.3 Specification The initial reading of the CRI, Ra, of a test lot shall not be less than the rated value decreased by three. 7 E

40、ffective Date The revised 3500K objective chromaticity and chromaticity tolerance requirements become effective January 1, 2016. 2 2014 National Electrical Manufacturers Association ANSI C78.376-2014 Figure 1 2700K Chromaticity Limits Figure 2 3000K Chromaticity Limits 2014 National Electrical Manuf

41、acturers Association 3 ANSI C78.376-2014 Figure 4 4000K/4100K Chromaticity Limits Figure 3 3500K Chromaticity Limits 4 2014 National Electrical Manufacturers Association ANSI C78.376-2014 Figure 5 5000K Chromaticity Limits Figure 6 6500K Chromaticity Limits 2014 National Electrical Manufacturers Association 5 NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB