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GB/T 7922-2023 English PDF

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Q: Should I purchase the latest version GB/T 7922-2023?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7922-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$419.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 7922-2023: Method of measuring color of light sources
Status: Valid

GB/T 7922: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7922-2023	419	Add to Cart	4 days	Method of measuring color of light sources	Valid
GB/T 7922-2008	479	Add to Cart	3 days	Method of measuring the color of light sources	Obsolete
GB/T 7922-2003	399	Add to Cart	3 days	Method of measuring the color of light sources	Obsolete
GB/T 7922-1987	359	Add to Cart	3 days	Methods of measuring the colour of light source	Obsolete

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Basic data

Standard ID: GB/T 7922-2023 (GB/T7922-2023)
Description (Translated English): Method of measuring color of light sources
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A26
Classification of International Standard: 17.180.20
Word Count Estimation: 20,210
Date of Issue: 2023-05-23
Date of Implementation: 2023-09-01
Older Standard (superseded by this standard): GB/T 7922-2008
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 7922-2023: Method of measuring color of light sources

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 17:180:20 CCSA26 National Standards of People's Republic of China Replacing GB/T 7922-2008 Method for measuring the color of lighting sources Released on 2023-05-23 2023-09-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Measurement method 1 4:1 Classification of measurement methods 1 4:2 Light source color evaluation index 1 4:3 Measurement conditions 2 4:4 Measuring instruments 2 4:5 Measured light source and setting 3 4:6 Laboratory measurements 3 4:7 On-site measurement 5 5 Processing of measurement results 5 5:1 Calculation of total spectral radiant flux 5 5:2 Calculation of tristimulus values 6 5:3 Calculation of chromaticity coordinates 6 5:4 Calculation of color evaluation items of white light source 7 5:5 Calculation of Color Evaluation Items for Colored Light Sources 7 5:6 Calculation of other color evaluation items 7 6 Test report 8 Appendix A (Normative) CIE1931 Standard Chromaticity Observer Color Matching Function 10 Appendix B (Normative) CIE1964 standard chromaticity observer color matching function 11 Appendix C (Normative) Calculation of Color Tolerance 12

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: This document replaces GB/T 7922-2008 "Measurement method for color of lighting source": Compared with GB/T 7922-2008, except for structural In addition to rectification and editorial changes, the main technical changes are as follows: a) The content of the scope of the standard has been changed (see Chapter 1, Chapter 1 of the:2008 edition); b) Added terms and definitions such as color gamut and color gamut coverage (see Chapter 3); c) Changed the test method (see Chapter 4, Chapter 4 of the:2008 edition); d) The method for measuring and calculating the color consistency of the surface of the lighting source has been added (see 4:6:5 and 5:6:2); e) Increase the spatial color uniformity of the lighting source (see 5:4:2); f) The calculation method of color evaluation items for colored light sources has been added (see 5:5); g) The color consistency calculation method in the dimming process of the lighting source is added (see 5:6:3): Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed and managed by the National Color Standardization Technical Committee (SAC/TC120): This document is drafted by: China Academy of Building Research Co:, Ltd:, Jianke Environmental Energy Technology Co:, Ltd:, Shenzhen Haichuan Industrial Co:, Ltd: Co:, Ltd:, Changzhou Urban Lighting Management Office, Holsail Lighting Technology Group Co:, Ltd:, Shanghai Xinlong Optoelectronics Technology Co:, Ltd:, Shenzhen Zhongmeiou Optoelectronics Technology Co:, Ltd:, Dongguan Ruishi Optoelectronics Technology Co:, Ltd: The main drafters of this document: Wang Shuxiao, Zhang Bin, He Weiping, Ling Wei, Wang Peixing, Liu Fang, Wu Wei, Wang Guohua, Wei Min, Yin Shile, Wang Hua: This document was first released in 1987, revised for the first time in:2003, revised for the second time in:2008, and this is the third revision: Method for measuring the color of lighting sources

1 Scope

This document specifies the measurement method for the color of the lighting source, the processing of the measurement results, and the test report: This document is applicable to the measurement of the color of various lighting sources (hereinafter referred to as "light sources"):

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 5698 Color Terminology GB/T 7921 Uniform color space and color difference formula GB/T 9468 General Requirements for Photometric Measurement of Luminaires GB/T 39394 Test methods for LED lamps, LED lamps and LED modules JJG213 distribution (color) temperature standard lamp

3 Terms and Definitions

The following terms and definitions defined in GB/T 5698 apply to this document: 3:1 color gamut colorgamut The range of colors that can be represented by radiation from a light source or system: 3:2 In the CIE1976LUV uniform chromaticity u', v' chromaticity scale diagram, the area of the polygon formed by the chromaticity coordinates of each primary color accounts for the spectral color rail Percentage of the area within the trace (0:1952):

4 Measurement method

4:1 Classification of measurement methods Light source color measurement is divided into laboratory measurement and field measurement according to the measurement location: Laboratory measurements verify the performance of the light source: Field measurements The lighting effect produced by the lighting installation can be tested: 4:2 Light source color evaluation index 4:2:1 According to the type of light source, the following classifications can be made: a) According to the color of the light source, it can be divided into white light source and colored light source; b) According to the dimming characteristics of the light source, it can be divided into dimmable light source and non-dimmable light source; c) According to the number of packaged light sources in the light source, it can be divided into single-channel light source, double-channel light source and multi-channel light source: ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 7922-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 7922-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 7922-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 7922-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 7922-2023?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 7922-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.