{"id":510707,"date":"2024-11-05T14:11:37","date_gmt":"2024-11-05T14:11:37","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/cie-2312019\/"},"modified":"2024-11-05T14:11:37","modified_gmt":"2024-11-05T14:11:37","slug":"cie-2312019","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/cie\/cie-2312019\/","title":{"rendered":"CIE 231:2019"},"content":{"rendered":"<p>The properties of illuminance meters and luminance meters are characterized by a number of selected quality indices defined in ISO\/CIE 19476:2014 &#034;Characterization of the Performance of Illuminance Meters and Luminance Meters&#034;, previously published as CIE S 023:2013. CIE 231:2019 summarizes existing national and regional classification systems of illuminance meters and luminance meters and recommends a CIE classification system. Like existing systems, the proposed CIE classification system is based on limit values for the different indices; but differently to all existing systems, the uncertainty of the determination of the quality indices is explicitly considered in the classification. In the annex some application-related requirements are recommended that should be considered where appropriate. The CIE classification system attributes a class to each quality index from 4* down to 1*, where 4* is the best quality. The lowest class of all quality indices specifies the class of the instrument. It is the first internationally agreed classification system for photometric measurement devices.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>CIE Classification System of Illuminance and Luminance Meters<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/cie\/\"><b>CIE<\/b><\/a><\/td>\n<td>2019-05-01<\/td>\n<td>44<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":510712,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2690],"product_tag":[],"class_list":{"0":"post-510707","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-cie","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/510707","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/510712"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=510707"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=510707"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=510707"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}