{"id":4216,"date":"2026-02-18T08:35:02","date_gmt":"2026-02-18T16:35:02","guid":{"rendered":"https:\/\/www.rbdinstruments.com\/blog\/?p=4216"},"modified":"2026-02-18T08:35:05","modified_gmt":"2026-02-18T16:35:05","slug":"dgc-iii-power-supply-board-check","status":"publish","type":"post","link":"https:\/\/www.rbdinstruments.com\/blog\/dgc-iii-power-supply-board-check\/","title":{"rendered":"DGC III power supply board check"},"content":{"rendered":"\n<p>The DGC III ion gauge control is used on many of the older PHI (Physical Electronics) surface analysis systems. Sometimes the DGC III fails to operate properly, and the unit will beep and display 0.0-3<\/p>\n\n\n\n<p>There are several possibilities for this issue;<\/p>\n\n\n\n<p>The filament may be open. This blog post shows you how to test for that &#8211; <a href=\"https:\/\/www.rbdinstruments.com\/blog\/how-to-test-an-ion-gauge-filament\/\">https:\/\/www.rbdinstruments.com\/blog\/how-to-test-an-ion-gauge-filament\/<\/a><\/p>\n\n\n\n<p>One or more of the voltages on the power supply board (+\/-12, +5) may be defective. This PDF file shows how to test for that &#8211; <\/p>\n\n\n\n<div class=\"wp-block-file\"><object class=\"wp-block-file__embed\" data=\"https:\/\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2026\/02\/DIG-III-Power-supply-board-check.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of DIG-III-Power-supply-board-check.\"><\/object><a id=\"wp-block-file--media-a22b0095-2a00-4cf5-b930-1ee86a6b3d81\" href=\"https:\/\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2026\/02\/DIG-III-Power-supply-board-check.pdf\">DIG-III-Power-supply-board-check<\/a><a href=\"https:\/\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2026\/02\/DIG-III-Power-supply-board-check.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-a22b0095-2a00-4cf5-b930-1ee86a6b3d81\">Download<\/a><\/div>\n\n\n\n<p>Some other things that you can check include \u2013<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-rbd-techspot wp-block-embed-rbd-techspot\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"7WGkPw2P0r\"><a href=\"https:\/\/www.rbdinstruments.com\/blog\/dgc-iii-filament-select-relay\/\">DGC III Filament Select Relay<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;DGC III Filament Select Relay&#8221; &#8212; RBD TechSpot\" src=\"https:\/\/www.rbdinstruments.com\/blog\/dgc-iii-filament-select-relay\/embed\/#?secret=LXegHGIIFJ#?secret=7WGkPw2P0r\" data-secret=\"7WGkPw2P0r\" width=\"584\" height=\"329\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-rbd-techspot wp-block-embed-rbd-techspot\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"cokVlwtCZY\"><a href=\"https:\/\/www.rbdinstruments.com\/blog\/ion-gauge-coated-ceramics\/\">Ion gauge coated ceramics<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;Ion gauge coated ceramics&#8221; &#8212; RBD TechSpot\" src=\"https:\/\/www.rbdinstruments.com\/blog\/ion-gauge-coated-ceramics\/embed\/#?secret=x05eDhkLJZ#?secret=cokVlwtCZY\" data-secret=\"cokVlwtCZY\" width=\"584\" height=\"329\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>If none of the above things solve the issue then most likely one of the other boards (emission, microprocessor, electrometer, set point) is bad. Troubleshooting those boards is more challenging so typically if the problem is not the filament or power supply board then the unit is set to RBD Instruments for repair. To contact RBD you can create a ticket here \u2013<a href=\"https:\/\/www.rbdinstruments.com\/support\/portal.html\">https:\/\/www.rbdinstruments.com\/support\/portal.html<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This blog post shows you how to test the power supply board in the DGC III ion gauge controller that is used on many of the older PHI XPS surface analysis systems. <a href=\"https:\/\/www.rbdinstruments.com\/blog\/dgc-iii-power-supply-board-check\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":3679,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","footnotes":"","jetpack_publicize_message":"This blog post shows how to test the power supply board in the DGC III ion gauge controller.","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[164,162],"tags":[30,406],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2023\/02\/Filament-relay.jpg?fit=1512%2C2016&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-160","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":3675,"url":"https:\/\/www.rbdinstruments.com\/blog\/dgc-iii-filament-select-relay\/","url_meta":{"origin":4216,"position":0},"title":"DGC III Filament Select Relay","author":"Randy","date":"February 9, 2023","format":false,"excerpt":"How to clean the filament select relay on a DGC III ion gauge controller.","rel":"","context":"In &quot;General Optics and Vacuum&quot;","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"DGC III ion gauge controller","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2023\/02\/Filament-relay.jpg?fit=900%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2023\/02\/Filament-relay.jpg?fit=900%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2023\/02\/Filament-relay.jpg?fit=900%2C1200&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":178,"url":"https:\/\/www.rbdinstruments.com\/blog\/dgc-iii-digital-ion-gauge-control\/","url_meta":{"origin":4216,"position":1},"title":"Operation of the DGC III Digital Ion Gauge Control","author":"Randy","date":"October 14, 2012","format":false,"excerpt":"One of the more common questions that we get concerning the DGC III digital ion gauge control (also known as the DIG III) is how to enter the set point values. We created this video to demonstrate the basic operation of the DIG III including the set points.\u00a0 For advanced\u2026","rel":"","context":"In &quot;General Optics and Vacuum&quot;","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"Set point relays","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2012\/10\/Set-point-relays.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1829,"url":"https:\/\/www.rbdinstruments.com\/blog\/dgc-iv-calibration\/","url_meta":{"origin":4216,"position":2},"title":"DGC IV calibration","author":"Randy","date":"November 8, 2016","format":false,"excerpt":"\u00a0 Years ago RBD Instruments had our DGC IV manufactured by JC Controls.\u00a0 The DGC IV is basically the same thing as a IG4500.Although we no longer produce the DGC IV, there are still a few of them in the field.\u00a0 The calibration procedure is listed below.\u00a0POTENTIOMETERS LIST PR7(VREF)Reference Voltage\u2026","rel":"","context":"In &quot;Operation and Calibration Procedures&quot;","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":406,"url":"https:\/\/www.rbdinstruments.com\/blog\/bake-out-procedure-to-improve-base-vacuum\/","url_meta":{"origin":4216,"position":3},"title":"PHI 5600 XPS system Bakeout procedure to improve base vacuum","author":"Randy","date":"August 30, 2019","format":"gallery","excerpt":"Updated 8-30-19 This post explains the bakeout procedure to improve base vacuum in a PHI 5600 X-ray photoelectron spectrometer. The procedure is basically the same for most of the older PHI (Physical Electronics) Spherical Capacitive Analyzer XPS surface analysis systems. PHI X-ray photoelectron spectrometers generally have built-in radiant heaters as\u2026","rel":"","context":"In &quot;General Optics and Vacuum&quot;","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"bakeout blankets on chamber","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/04\/bakeout-blankets-on-chamber.jpg?fit=500%2C333&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":786,"url":"https:\/\/www.rbdinstruments.com\/blog\/how-to-test-an-ion-gauge-filament\/","url_meta":{"origin":4216,"position":4},"title":"How to test an ion gauge filament","author":"Randy","date":"October 11, 2013","format":false,"excerpt":"This post will explain how to test and replace the nude ion gauge filament assembly on a Physical Electronic (PHI) X-ray photoelectron, Auger electron or SIMS system. Look at the pictures at the bottom of the post before you read the procedures. Background \u2013 On most PHI surface analysis systems\u2026","rel":"","context":"In &quot;General Optics and Vacuum&quot;","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"ohm-out-filament-connections","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/10\/ohm-out-filament-connections.jpg?fit=486%2C324&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":61,"url":"https:\/\/www.rbdinstruments.com\/blog\/ion-gauge-filament-replacement-procedure\/","url_meta":{"origin":4216,"position":5},"title":"Ion gauge filament replacement procedure","author":"Randy","date":"August 26, 2012","format":"link","excerpt":"Another common question we get is how to connect the wires on an ion gauge after replacing the filaments.\u00a0 The tech tip link below titled Ion Gauge Filament Replacement shows the pin outs for an ion gauge on a Physical Electronics\u00a0 (PHI) surface analysis system. The attached tech tip is\u2026","rel":"","context":"In &quot;General Optics and Vacuum&quot;","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/4216"}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=4216"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/4216\/revisions"}],"predecessor-version":[{"id":4219,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/4216\/revisions\/4219"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/3679"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=4216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=4216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=4216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}