{"id":4503,"date":"2025-08-05T09:37:21","date_gmt":"2025-08-05T07:37:21","guid":{"rendered":"https:\/\/www.drwiesner.de\/glossary\/helium-leak-test-accumulation-method\/"},"modified":"2025-11-28T15:15:13","modified_gmt":"2025-11-28T14:15:13","slug":"helium-leak-test-accumulation-method","status":"publish","type":"glossary","link":"https:\/\/www.drwiesner.de\/en\/glossary\/helium-leak-test-accumulation-method\/","title":{"rendered":"Helium Leak Test Accumulation Method"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"4503\" class=\"elementor elementor-4503 elementor-1987\" data-elementor-post-type=\"glossary\">\n\t\t\t\t<div class=\"elementor-element elementor-element-22ea601 e-flex e-con-boxed e-con e-parent\" data-id=\"22ea601\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b10319b elementor-widget elementor-widget-text-editor\" data-id=\"b10319b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Helium leak testing using the accumulation method is a new procedure that has only recently been introduced to the market. Consequently, practical experience is still limited. However, the method was designed to combine the advantages of various other methods and minimize the known disadvantages of previous helium leak testing procedures.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e1b913 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"3e1b913\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d83a1dd e-flex e-con-boxed e-con e-parent\" data-id=\"d83a1dd\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-641edc3 elementor-widget elementor-widget-text-editor\" data-id=\"641edc3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Method:<\/strong><\/p>\n<p>The test object is sealed, filled with the test gas under test pressure, and surrounded by a shielding hood. The gas volume under the hood is continuously circulated to ensure uniform mixing of the test gas escaping through leaks under the hood with the air inside the hood. A portion of this gas mixture is continuously fed to the helium leak detector, which can detect even the slightest traces of the test gas.  <\/p>\n<p>A semi-permeable silicon membrane is used in the leak detector to increase the helium concentration in a special detection chamber sufficiently for detection to occur under ambient pressure. This also makes it possible to measure a slowly increasing concentration of the test gas, and the influence of a background concentration is less significant. <\/p>\n<p><strong>Test medium:<\/strong><\/p><p>Helium (pure or in any mixing ratios with other gases)<\/p>\n<p><strong>detectable leak rates:&nbsp;<\/strong><\/p><p>&gt;0.0001 cm&sup3;\/min<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56f8b7d elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"56f8b7d\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f931a13 e-flex e-con-boxed e-con e-parent\" data-id=\"f931a13\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cd84506 elementor-widget elementor-widget-text-editor\" data-id=\"cd84506\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Advantages<\/strong><\/p><ul><li>Very small leaks can be detected.<\/li><li>The test method is simple to use.<\/li><li>The test is carried out in an automated testing facility under defined temporal and pressure conditions. This makes the test results independent of the operator&rsquo;s diligence and more reproducible. <\/li><li>The temperature and elasticity of the test object have no influence on the test result.<\/li><li>By correlating the gas concentration factor with the leak rate, this method enables a quantifiable leak rate determination.<\/li><li>The test results can be automatically documented.<\/li><li>The test chamber has a simple design, making it cost-effective, and no vacuum is required inside it.<\/li><li>In the accumulation method, the increase in test gas within the test period is measured and evaluated. The influence of the natural helium content in the atmosphere and the issue of workplace contamination play a lesser role. <\/li><\/ul><p> <\/p><p><strong>Disadvantages:<\/strong><\/p><ul><li>Significant mechanical complexity for the test setup due to high-quality seals under a shielding hood. This complicates fault diagnosis in case of sealing problems. <\/li><li>Risk of test gas contamination in case of incorrect operation or a gross leak.<\/li><li>New method with limited practical experience.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5363c1a e-flex e-con-boxed e-con e-parent\" data-id=\"5363c1a\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e9b67d elementor-widget elementor-widget-text-editor\" data-id=\"0e9b67d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Notes:<\/strong><\/p><ul><li>Sufficient and complete filling of the test chamber with the test gas must be ensured. Therefore, the test chamber should be adequately flushed or first evacuated and then filled with the test gas. <\/li><li>After testing, the test gas must be systematically removed from the workplace, otherwise, even with the accumulation method, a background concentration can build up over time, hindering work. Helium is the most critical of the known test gases concerning contamination issues. <\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d8f4b0 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"5d8f4b0\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a6b244 elementor-widget elementor-widget-image\" data-id=\"5a6b244\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"389\" src=\"https:\/\/www.drwiesner.de\/wp-content\/uploads\/Helium-Akumulation-768x389_EN.png\" class=\"attachment-medium_large size-medium_large wp-image-5054\" alt=\"Operating Principle of the Helium Accumulation Method\" srcset=\"https:\/\/www.drwiesner.de\/wp-content\/uploads\/Helium-Akumulation-768x389_EN.png 768w, https:\/\/www.drwiesner.de\/wp-content\/uploads\/Helium-Akumulation-768x389_EN-300x152.png 300w\" sizes=\"(max-width: 768px) 100vw, 768px\"\/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Operating Principle of the Helium Accumulation Method<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"pdfprnt-buttons pdfprnt-buttons-glossary pdfprnt-bottom-right\"><a href=\"https:\/\/www.drwiesner.de\/en\/wp-json\/wp\/v2\/glossary\/4503?print=pdf\" class=\"pdfprnt-button pdfprnt-button-pdf\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/www.drwiesner.de\/wp-content\/plugins\/pdf-print\/images\/pdf.png\" alt=\"image_pdf\" title=\"View PDF\"\/><span class=\"pdfprnt-button-title pdfprnt-button-pdf-title\">Download<\/span><\/a><a href=\"https:\/\/www.drwiesner.de\/en\/wp-json\/wp\/v2\/glossary\/4503?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/www.drwiesner.de\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"\/><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Drucken<\/span><\/a><\/div>","protected":false},"excerpt":{"rendered":"<p>Helium leak testing using the accumulation method is a new procedure that has only recently been introduced to the market. Consequently, practical experience is still limited. However, the method was designed to combine the advantages of various other methods and minimize the known disadvantages of previous helium leak testing procedures. Method: The test object is [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"glossary-categories":[],"glossary-tags":[],"class_list":["post-4503","glossary","type-glossary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Helium Leak Test Accumulation Method - Wiesner Pr\u00fcftechnik GmbH<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.drwiesner.de\/en\/glossary\/helium-leak-test-accumulation-method\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Helium Leak Test Accumulation Method - Wiesner Pr\u00fcftechnik GmbH\" \/>\n<meta property=\"og:description\" content=\"Helium leak testing using the accumulation method is a new procedure that has only recently been introduced to the market. 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