GB/T 5699-2025Method of daylighting measurements (English PDF)

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 5699-2017 Daylighting Measurement Methods. Compared with GB/T 5699-2017, except for structural adjustments and editorial In addition to the modifications, the main technical changes are as follows.

a) Deleted the conformity determination (see 6.5, 7.3, 8.2.2, and 9.2.4 of the 2017 edition);

b) Added requirements on measurement content (see 4.3);

c) Added requirements for image luminance meters (see 5.2);

d) Added requirements for gloss meters (see 5.4);

e) Added the requirements for the observation positions of window brightness and background brightness when measuring the discomfort glare index of windows (see 8.1);

f) Added physiological equivalent illuminance measurement requirements (see 9.1);

g) Added the measurement requirements for field of view (see 9.2);

h) Added the requirements for specular gloss measurement (see 10.4);

i) Added measurement point layout requirements for school classrooms and rooms connected to balconies in residential buildings (see Appendix B).

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed and coordinated by the National Technical Committee on Ergonomics Standardization (SAC/TC7).

This document was drafted by: China Academy of Building Research Co., Ltd., China National Institute of Standardization, Beijing Green Building Software Co., Ltd., Chongqing University, South China University of Technology, Tongji University, Jianke Environmental Energy Technology Co., Ltd., Beijing Construction Engineering Quality Inspection No. 6 Co., Ltd.

Co., Ltd., Jiangsu Simba New Materials Technology Co., Ltd.

The main drafters of this document are: Zhang Bin, Ran Linghua, Luo Tao, Zhang Xin, Zhang Jinqian, Liang Shuying, Bian Yu, Wu Yujie, Zhang Jinhua, Wang Guohua, Wei Shanshan, Wang Man.

The previous versions of this document and the documents it replaces are as follows.

— GB/T 5699-1985 was first issued in 1985;

— In the first revision in 2005, the contents of GB/T 13378-1992 “Methods for measuring daylighting on sunny days” were incorporated;

— 2017 was the second revision;

— This is the third revision. Daylight measurement methods

1 Scope

This document specifies the general requirements for daylighting measurement, measuring instruments and daylighting factor, daylighting standard area ratio, brightness, physiological equivalent illuminance, visual Measurement method of field and material optical parameters.

This document is applicable to the daylighting measurements of all types of buildings with top or side lighting, including the daylighting measurements of buildings using light pipe lighting systems.

2 Normative references

GB/T 5702

GB/T 20148

JJG211

JJG245

JJG696

3 Terms and Definitions

The terms and definitions defined in JGJ/T 119 and the following apply to this document.