{"id":1632,"date":"2014-06-13T08:04:19","date_gmt":"2014-06-13T07:04:19","guid":{"rendered":"https:\/\/blog.wika.com\/en\/?p=1632"},"modified":"2022-12-13T08:10:44","modified_gmt":"2022-12-13T07:10:44","slug":"diagnostic-coverage","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/","title":{"rendered":"What is meant by diagnostic coverage?"},"content":{"rendered":"<p><strong>An important parameter in the use of pressure sensors in safety devices is the so-called \u201cDiagnostic Coverage\u201d (DC). However, since single-channel, in particular, but also two-channel safety circuits often malfunction or may be defective, a known diagnostic coverage helps interpret such structures properly.<\/strong><\/p>\n<p>Here, a statistical significance for the diagnostic coverage can only be determined by testing a larger number of instruments in standardised procedures. <span style=\"text-decoration: underline\">With the fault detection, two failure types are primarily distinguished:<\/span><\/p>\n<ul>\n<li>Detected dangerous failure: Failures which could lead to a loss of the safety function\u00a0-&gt; only faults which are detected.<\/li>\n<li>Dangerous failure: All failures that could potentially lead to a loss of the safety function -&gt;\u00a0detected and undetected failures.<\/li>\n<\/ul>\n<h2>Dangerous failure<b><\/b><\/h2>\n<p>A dangerous failure is a failure that, first and foremost, represents a risk to humans, but may also cause damage to the machinery or to the products. <\/p>\n<h2>Calculation of the diagnostic coverage &#8211; classification dignostic coverage<b><br \/>\n\u00a0<\/b><b><\/b><\/h2>\n<p>\n      <div class=\"wp-caption alignleft\" style=\"max-width:351px;\"><a href=\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1636\" src=\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage.jpg\" width=\"343\" height=\"137\" srcset=\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage.jpg 660w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage-375x150.jpg 375w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage-399x158.jpg 399w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage-252x100.jpg 252w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/formular-diagnostic-coverage-388x155.jpg 388w\" sizes=\"auto, (max-width: 343px) 100vw, 343px\" \/><\/a><p class=\"wp-caption-text\">\u03bbdd: Number of detected dangerous failures\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u03bbdu: Number of undetected dangerous failures<\/p><\/div>\n     \n      <div class=\"wp-caption alignright\" style=\"max-width:396px;\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1634 size-ArticleHalf\" src=\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/classification-dignostic-coverage-388x130.jpg\" alt=\"\" width=\"388\" height=\"130\" srcset=\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/classification-dignostic-coverage-388x130.jpg 388w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/classification-dignostic-coverage-768x258.jpg 768w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/classification-dignostic-coverage-447x150.jpg 447w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/classification-dignostic-coverage-1024x344.jpg 1024w, https:\/\/blog.wika.com\/en\/files\/2014\/06\/classification-dignostic-coverage.jpg 1102w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><p class=\"wp-caption-text\">Classification dignostic coverage<\/p><\/div>\n    <\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>The diagnostic coverage must be determined for the entire safety circuit (sensor + controller + actuator) and also defines the maximum achievable level of <a href=\"\/knowhow\/sil-pl-probability-failure-safety-function\/\" target=\"_blank\" rel=\"noopener\">SIL or PL<\/a>. Therefore, in the selection of pressure sensors, it is recommended to favour those with higher levels of diagnostic coverage over those with lower levels of diagnostic coverage. WIKA offers comprehensive solutions for the use of pressure sensors in a wide range of applications.<\/p>\n<p><strong>Note<\/strong><a href=\"https:\/\/blog.wika.com\/en\/contact\/\"><br \/>\nContact us<\/a> and we are happy to provide you with advice.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An important parameter in the use of pressure sensors in safety devices is the so-called \u201cDiagnostic Coverage\u201d (DC). However, since single-channel, in particular, but also two-channel safety circuits often malfunction or may be defective, a known diagnostic coverage helps interpret such structures properly. Here, a statistical significance for the diagnostic coverage can only be determined [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":1633,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[262,263],"class_list":["post-1632","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowhow","tag-functional-safety-sil","tag-performance-level"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is meant by diagnostic coverage? - WIKA blog<\/title>\n<meta name=\"description\" content=\"An important parameter in the use of pressure sensors in safety devices is the so-called \u201cDiagnostic Coverage\u201d (DC). 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Find out more in this blog article!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/\" \/>\n<meta property=\"og:site_name\" content=\"WIKA blog\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/Formel_Diagnosedeckungsgrad.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"660\" \/>\n\t<meta property=\"og:image:height\" content=\"660\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Stefan Heusel\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Stefan Heusel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated 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:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/\"},\"author\":{\"name\":\"Stefan Heusel\",\"@id\":\"https:\/\/blog.wika.com\/en\/#\/schema\/person\/2315f4f9379074507a283fc8cf51a343\"},\"headline\":\"What is meant by diagnostic coverage?\",\"datePublished\":\"2014-06-13T07:04:19+00:00\",\"dateModified\":\"2022-12-13T07:10:44+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/\"},\"wordCount\":275,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/Formel_Diagnosedeckungsgrad.jpg\",\"keywords\":[\"Functional safety (SIL)\",\"Performance level\"],\"articleSection\":[\"Know-how\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/\",\"url\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/\",\"name\":\"What is meant by diagnostic coverage? - WIKA blog\",\"isPartOf\":{\"@id\":\"https:\/\/blog.wika.com\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/diagnostic-coverage\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.wika.com\/en\/files\/2014\/06\/Formel_Diagnosedeckungsgrad.jpg\",\"datePublished\":\"2014-06-13T07:04:19+00:00\",\"dateModified\":\"2022-12-13T07:10:44+00:00\",\"author\":{\"@id\":\"https:\/\/blog.wika.com\/en\/#\/schema\/person\/2315f4f9379074507a283fc8cf51a343\"},\"description\":\"An important parameter in the use of pressure sensors in safety devices is the so-called \u201cDiagnostic Coverage\u201d (DC). 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