{"id":7617,"date":"2022-11-24T13:47:54","date_gmt":"2022-11-24T12:47:54","guid":{"rendered":"https:\/\/dfm.dk\/2025\/03\/19\/video-on-defining-the-primary-normal\/"},"modified":"2025-04-20T09:11:02","modified_gmt":"2025-04-20T07:11:02","slug":"video-on-defining-the-primary-normal","status":"publish","type":"post","link":"https:\/\/dfm.dk\/en\/2022\/11\/24\/video-on-defining-the-primary-normal\/","title":{"rendered":"Video on defining the primary normal"},"content":{"rendered":"

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We’ve created a new video that explains the definition of the primary normal for length and how coordinate measurements can be traced back to it.<\/span><\/p>\n

The primary standard is the ultra-precise reference to which all length measurement instrument calibrations must be traceable. <\/span><\/p>\n

In Denmark, the DFM is responsible for the primary standard for length. In the past, the primary standard was a very precise platinum rod of a 1-meter length, but today light is used to define the primary standard. <\/span><\/p>\n

<\/span><\/p>\n

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We’ve created a new video that explains the definition of the primary normal for length and how coordinate measurements can be traced back to it. The primary standard is the ultra-precise reference to which all length measurement instrument calibrations must be traceable. In Denmark, the DFM is responsible for the primary standard for length. In […]<\/p>\n","protected":false},"author":8,"featured_media":4136,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"categories":[69,73],"tags":[],"class_list":["post-7617","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-metrology","category-news"],"yoast_head":"\nVideo on defining the primary normal - DFM<\/title>\n<meta name=\"description\" content=\"The primary standard is the ultra-precise reference to which all length measurement instrument calibrations must be traceable.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dfm.dk\/en\/2022\/11\/24\/video-on-defining-the-primary-normal\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Video on defining the primary normal\" \/>\n<meta property=\"og:description\" content=\"The primary standard is the ultra-precise reference to which all length measurement instrument calibrations must be traceable.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dfm.dk\/en\/2022\/11\/24\/video-on-defining-the-primary-normal\/\" \/>\n<meta property=\"og:site_name\" content=\"DFM\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-24T12:47:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-04-20T07:11:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dfm.dk\/wp-content\/uploads\/2020\/12\/DFM_031220_N2A8565-HD.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1280\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Thomas Rasmussen\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Thomas Rasmussen\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/dfm.dk\\\/en\\\/2022\\\/11\\\/24\\\/video-on-defining-the-primary-normal\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/dfm.dk\\\/en\\\/2022\\\/11\\\/24\\\/video-on-defining-the-primary-normal\\\/\"},\"author\":{\"name\":\"Thomas Rasmussen\",\"@id\":\"https:\\\/\\\/dfm.dk\\\/en\\\/#\\\/schema\\\/person\\\/66f235833af45d76c771c9300b48b502\"},\"headline\":\"Video on defining the primary normal\",\"datePublished\":\"2022-11-24T12:47:54+00:00\",\"dateModified\":\"2025-04-20T07:11:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/dfm.dk\\\/en\\\/2022\\\/11\\\/24\\\/video-on-defining-the-primary-normal\\\/\"},\"wordCount\":203,\"image\":{\"@id\":\"https:\\\/\\\/dfm.dk\\\/en\\\/2022\\\/11\\\/24\\\/video-on-defining-the-primary-normal\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/dfm.dk\\\/wp-content\\\/uploads\\\/2020\\\/12\\\/DFM_031220_N2A8565-HD.jpg\",\"articleSection\":[\"Metrology\",\"News\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/dfm.dk\\\/en\\\/2022\\\/11\\\/24\\\/video-on-defining-the-primary-normal\\\/\",\"url\":\"https:\\\/\\\/dfm.dk\\\/en\\\/2022\\\/11\\\/24\\\/video-on-defining-the-primary-normal\\\/\",\"name\":\"Video on defining the primary normal - 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