GB/T 22505-2008 PDF EnglishUS$110.00 · In stock · Download in 9 seconds
GB/T 22505-2008: Inspection of grain and oils -- Sensory analysis environment-lighting Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 22505-2008: Inspection of grain and oils -- Sensory analysis environment-lighting---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT22505-2008GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 67.040 B 20 Inspection of Grain and Oils - Sensory Analysis Environment - Lighting ISSUED ON: NOVEMBER 4, 2008 IMPLEMENTED ON: JANUARY 20, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Terms and Definitions ... 4 3 Lighting Quality ... 5 4 Illuminance ... 5 5 Installation of Lighting Equipment ... 5 6 Maintenance of Lighting Equipment ... 6 Appendix A (normative) Light Color Quality Characteristics of Lighting for Grain and Oil Inspection ... 7 Inspection of Grain and Oils - Sensory Analysis Environment - Lighting1 ScopeThis Standard specifies the lighting quality, illuminance, installation and maintenance of lighting equipment for the sensory inspection of grains and oils. This Standard is applicable to the lighting for the sensory inspection of grains and oils.2 Terms and DefinitionsThe following terms and definitions are applicable to this document. 2.1 North Sky Light North sky light refers to the skylight seen from the north window that avoids direct sunlight from 3 h after sunrise to 3 h before sunset. 2.2 Color Temperature When the chromaticity of the light source is the same as that of a perfect radiator at a certain temperature, the absolute temperature of the perfect radiator is the color temperature of the light source. The symbol of color temperature is Tc and the unit is K. 2.3 General Color Rendering Index General color rendering index refers to the average value of the special color rendering index of the light source to the 8 colors specified by CIE, and the symbol is Ra. 2.4 CIE Standard Illuminants CIT standard illuminants refer to a specific relative spectral power distribution incident on an object as specified by CIE. 2.4.1 Standard illuminants A Standard illuminants A refer to a perfect radiator with an absolute temperature of 2,856 K in accordance with the international practical thermometric scale. 2.4.2 Standard illuminants C Standard illuminants C refer to the average daylight with a correlated color temperature of about 6,774 K. 2.4.3 Standard illuminants D65 Standard illuminants D65 refer to the average daylight with a correlated color temperature of about 6,504 K. 2.4.4 Standard illuminants D55 Standard illuminants D55 refer to the daylight with a correlated color temperature of about 5,503 K. 2.4.5 Standard illuminants D75 Standard illuminants D75 refer to the daylight with a correlated color temperature of about 7,504 K. 2.5 Illuminance Illuminance is the luminous flux incident on a surface element at a point on the surface divided by the area of the surface element, and the unit is (lx), 1 lx = 1 lm/m2.3 Lighting Quality3.1 Characteristics of Standard Lighting It shall be equivalent to the color temperature and spectral distribution of north sky light. See Appendix A for the specific requirements. 3.2 Requirements for Light Source 3.2.1 Correlated color temperature: 6,500 K 200 K. 3.2.2 General color rendering index: higher than 75. 3.2.3 The spectral distribution shall be as close as possible to the CIE standard illuminants D65 (Appendix A).4 IlluminanceThe illuminance on the surface of the entire inspection working area shall be within the range of (750 100) lx, and the maximum shall not exceed 1,000 lx.5 Installation of Lighting Equipment5.1 The light source shall be able to provide the required lighting quality and illuminance. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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