{"id":51634,"date":"2014-04-30T00:00:00","date_gmt":"2014-04-30T00:00:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/chemstation-101-restoring-a-previous-tune-file\/"},"modified":"2025-10-28T21:58:38","modified_gmt":"2025-10-28T21:58:38","slug":"chemstation-101-restoring-a-previous-tune-file","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/fr\/blogs\/gnbl4615\/chemstation-101-restoring-a-previous-tune-file","title":{"rendered":"Chemstation 101 &#8211; Restoring a Previous Tune File"},"content":{"rendered":"\n<p>It&#8217;s been a while since I&#8217;ve done one of these posts, and I&#8217;m in Alpharetta, Ga this week attending the Agilent MassHunter Data Analysis class. Let&#8217;s say I&#8217;ve been inspired by the data acquisition review.<\/p>\n\n\n\n<p>A few months back, Jason wrote about a way to reset his 5973 acquisition software after the tuning macro loses the ability to find the PFTBA mass peaks (69, 219, 502) in his blog entitled &#8220;Cannot achieve constant peak widths&#8221;. But what if you need to go back to a specific tune file? The most likely situation I can think of (since it has happened to me) is if you share an instrument, and a coworker re-tunes the instrument using the same .u file, changing the instrument&#8217;s response enough that your continuing calibration verification standard (CCV) now fails to meet method criteria. Instead of collecting a new calibration (ICAL), you can restore the tune file you used to collect the original calibration data, and reacquire and evaluate a CCV.<\/p>\n\n\n\n<p>First, we should probably talk about the difference between tune parameters and tune files. Tune parameters are the collection of targets and other settings saved to a .u file, like dftpp.u.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"417\" height=\"319\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-01.png\" alt=\"\" class=\"wp-image-13216\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-01.png 417w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-01-300x229.png 300w\" sizes=\"auto, (max-width: 417px) 100vw, 417px\" \/><\/figure>\n<\/div>\n\n\n<p>The file used to control the MSD during data collection can be found via the File menu in Tune and Vacuum Control.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"777\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-02-1024x777.png\" alt=\"\" class=\"wp-image-13222\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-02-1024x777.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-02-300x228.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-02-768x583.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-02.png 1234w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Selecting &#8220;Restore Previous Tune(s)&#8230;&#8221; will bring up a file browser for selecting the tune to restore. Unlike the parameter files, these don&#8217;t have a file extension; their names include the .u file used to generate them, plus a date and time code for when they were generated. This is where good record keeping helps.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"481\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-03.png\" alt=\"\" class=\"wp-image-13228\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-03.png 578w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-03-300x250.png 300w\" sizes=\"auto, (max-width: 578px) 100vw, 578px\" \/><\/figure>\n<\/div>\n\n\n<p>After you select your tune, the software performs a profile scan. If you like what you see, you can overwrite the file currently associated with the selected .u file. This technique should also correct the &#8220;cannot find constant peak widths&#8221; error Jason described in his blog.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"788\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-04-1024x788.png\" alt=\"\" class=\"wp-image-13234\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-04-1024x788.png 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-04-300x231.png 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-04-768x591.png 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-chemstation-101-restoring-a-previous-tune-file-04.png 1241w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s been a while since I&#8217;ve done one of these posts, and I&#8217;m in Alpharetta, Ga this week attending the Agilent MassHunter Data Analysis class. Let&#8217;s say I&#8217;ve been inspired by the data acquisition review. A few months back, Jason&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[9],"tags":[],"industries-application":[],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[2294,2301],"hf_cat_post":[623],"ppma_author":[584],"class_list":["post-51634","post","type-post","status-publish","format-standard","hentry","category-blogs","resource-technique-gas-chromatography-gc","resource-technique-mass-spectrometry-ms"],"acf":[],"taxonomy_info":{"category":[{"value":9,"label":"Blogs"}],"resource-technique":[{"value":2294,"label":"Gas Chromatography (GC)"},{"value":2301,"label":"Mass Spectrometry (MS)"}]},"featured_image_src_large":false,"author_info":{"display_name":"Patrick Gallagher","author_link":"https:\/\/discover.restek.com\/fr\/author\/patrick-gallagherrestek-com\/"},"comment_info":0,"category_info":[{"term_id":9,"name":"Blogs","slug":"blogs","term_group":0,"term_taxonomy_id":9,"taxonomy":"category","description":"","parent":0,"count":442,"filter":"raw","cat_ID":9,"category_count":442,"category_description":"","cat_name":"Blogs","category_nicename":"blogs","category_parent":0}],"tag_info":false,"authors":[{"term_id":584,"user_id":0,"is_guest":1,"slug":"chris-rattray","display_name":"Chris Rattray","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/posts\/51634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/comments?post=51634"}],"version-history":[{"count":2,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/posts\/51634\/revisions"}],"predecessor-version":[{"id":58838,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/posts\/51634\/revisions\/58838"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/media?parent=51634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/categories?post=51634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/tags?post=51634"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/industries-application?post=51634"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/post-badge?post=51634"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/resource-type?post=51634"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/product-library?post=51634"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/resource-technique?post=51634"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/hf_cat_post?post=51634"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/fr\/wp-json\/wp\/v2\/ppma_author?post=51634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}