{"id":1452,"date":"2015-05-09T08:53:49","date_gmt":"2015-05-09T15:53:49","guid":{"rendered":"http:\/\/www.rbdinstruments.com\/blog\/?p=1452"},"modified":"2015-05-09T08:53:49","modified_gmt":"2015-05-09T15:53:49","slug":"15-255g-filament-change-procedure","status":"publish","type":"post","link":"https:\/\/www.rbdinstruments.com\/blog\/15-255g-filament-change-procedure\/","title":{"rendered":"15-255G Filament Change Procedure"},"content":{"rendered":"

This post explains how to replace the C75-010 tungsten filament used in the Physical Electronics 15-255G double pass CMA.\u00a0\u00a0\u00a0 Refer to the pictures below for more details.\u00a0 RBD Instruments provides the C75-010 filaments as well as any other parts that you may need for your 15-255G analyzer.\u00a0 We also offer a complete analyzer rebuild service that includes a new filament and electron multiplier.<\/p>\n

15-255G Filament Change Procedure<\/strong><\/p>\n

\u00a0<\/strong>Use gloves, de-magnetize all tools and clean all tools with Isopropanol.\u00a0 Set up a work area with UHV aluminum foil.\u00a0 Or use regular aluminum foil and clean it with isopropanol.<\/p>\n

Set analyzer on stand or use manuals and support analyzer on handles, facing up.<\/p>\n

    \n
  1. Remove outer magnetic shield (3 screws)<\/li>\n
  2. Remove inner magnetic shield (4 screws)<\/li>\n
  3. Carefully remove conical ceramic cover.\u00a0\u00a0 Note that sometimes the conical ceramic will stick inside the cover. Be careful not to let it fall out if it does stick. If it falls out an breaks a replacement conical ceramic is expensive!<\/li>\n
  4. Remove conical ceramic and carefully set it on the aluminum foil.<\/li>\n
  5. Carefully lift inner cylinder up and off of the electron gun assembly. Note: If the inner cylinder does not move freely, use a heat gun to expand the inner cylinder so that it will slide off. Do not force it! Be careful not to damage the grids.<\/li>\n
  6. Look at the electron gun detail to familiarize yourself with the electron gun assembly.<\/li>\n
  7. Remove the deflection cover (3 small flat head screws)<\/li>\n
  8. Remove the deflection support screws (4 flat head)<\/li>\n
  9. Remove the deflection support post that is located between the two ceramic posts.<\/li>\n
  10. Tilt the electron gun out and down so that you can access the bottom plate of the electron gun.<\/li>\n
  11. Remove the three long screws that hold the electron gun assembly together.<\/li>\n
  12. Remove the V1 emission screw<\/li>\n
  13. Remove the 2 filament couplers from the filament posts. You will need a .048 4 spline wrench.<\/li>\n
  14. Remove the 3 filament support ceramics.<\/li>\n
  15. Remove the filament whenelt cap assembly. Note the orientation of the emission tab and filament posts as when you put the new filament in it will need to have the same orientation.<\/li>\n
  16. Remove the 3 screws that hold the filament base on and remove the filament.<\/li>\n
  17. Install the new filament in the same orientation as the old filament into the emission cap.<\/li>\n
  18. Install the 3 screws and the filament base and tighten slightly.<\/li>\n
  19. Position the filament so that it is centered in the hole and tighten the 3 screws. This is best done using a microscope. For best results the tip of the filament should be perfectly centered.<\/li>\n
  20. Install the filament assembly on top of the 3 filament support ceramics and use the 3 long screws to hold the assembly together. The three long screws need to be tightened firmly so that they all have the same distance with respect to the base.<\/li>\n
  21. Reconnect the V1 wire<\/li>\n
  22. Reconnect the filament couplers.<\/li>\n
  23. Install the deflection support post, screws and cover.<\/li>\n
  24. Ohm out the connections to the filament and V1.<\/li>\n
  25. Degauss the gun assembly.<\/li>\n
  26. Install the inner cylinder over the electron gun assembly.\u00a0 Line up the dead spots on the ceramic tubes.<\/li>\n
  27. Reinstall the upper outer cylinder.<\/li>\n
  28. Carefully install the conical ceramic. The resistor part should be 180 degrees out from the center flat ceramic. Ohm out OC (outer cylinder) to ground and make sure it has the correct resistance of 600 k ohms +\/- 100 k ohms.<\/li>\n
  29. Install the conical cover and tighten the screws firmly and evenly.<\/li>\n
  30. Install the inner magnetic shield<\/li>\n
  31. Degauss the analyzer.<\/li>\n
  32. Install the outer magnetic shield.<\/li>\n
  33. Degauss the analyzer. Installation complete.<\/li>\n<\/ol>\n

     <\/p>\n

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    <\/div>\n

     <\/p>\n","protected":false},"excerpt":{"rendered":"

    This post explains how to replace the C75-010 tungsten filament used in the Physical Electronics 15-255G double pass CMA.\u00a0\u00a0\u00a0 Refer to the pictures below for more details.\u00a0 RBD Instruments provides the C75-010 filaments as well as any other parts that … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1453,"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":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[164],"tags":[184,99],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2015\/05\/check-screw-distance.jpg?fit=486%2C324&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-nq","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":707,"url":"https:\/\/www.rbdinstruments.com\/blog\/10-155-filament-replacement-procedure\/","url_meta":{"origin":1452,"position":0},"title":"10-155 Filament replacement procedure","author":"Randy","date":"July 22, 2013","format":false,"excerpt":"This blog post is an updated version of the 10-155 filament replacement procedure first published on the RBD Instruments website as a Technical Tip a number of years ago. This version has been updated with some close up pictures of the electron gun assembly shown at the bottom of this\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"filament-coupler-space-between","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/07\/filament-coupler-space.jpg?fit=972%2C648&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/07\/filament-coupler-space.jpg?fit=972%2C648&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/07\/filament-coupler-space.jpg?fit=972%2C648&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":300,"url":"https:\/\/www.rbdinstruments.com\/blog\/phi-optics-repair-guidelines-2\/","url_meta":{"origin":1452,"position":1},"title":"PHI Optics Repair Guidelines","author":"Randy","date":"January 17, 2013","format":false,"excerpt":"This document contains information about optics repair methods, procedures and tricks that are useful when working on older PHI optics units such as cylindrical mirror analyzers, x-ray photoelectron spectrometers and sputter ion sources. General Optics Guidelines. Clean all tools with isopropanol or methanol and also degauss them if possible. Most\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/01\/10-155-electron-gun-detail.png?fit=619%2C568&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1521,"url":"https:\/\/www.rbdinstruments.com\/blog\/esca-analyzer-filament-procedure\/","url_meta":{"origin":1452,"position":2},"title":"ESCA Analyzer Filament Procedure","author":"Randy","date":"June 19, 2015","format":false,"excerpt":"ESCA Analyzer Filament Replacement\u00a0 Procedure This procedure details the step by step process to replace the tungsten filament in a PHI 25-250, 260 or 270 ESCA analyzer used on the older PHI 550, 560 and 570 ESCA systems. RBD Instruments provides this filament (the C75-010). Here is a link to\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2025\/03\/Analyzer-resistances.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2025\/03\/Analyzer-resistances.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2025\/03\/Analyzer-resistances.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":1349,"url":"https:\/\/www.rbdinstruments.com\/blog\/25-110-analyzer-filament\/","url_meta":{"origin":1452,"position":3},"title":"25-110 Analyzer Filament","author":"Randy","date":"February 11, 2015","format":false,"excerpt":"This is an old tech tip that I wrote back in 2002. The 25-110 analyzer was the first CMA that Physical Electronics used a Lab6 filament in. These days there are not a lot of 590 systems still in operation, but the ones that are still work well especially as\u2026","rel":"","context":"In "General Optics and Vacuum"","block_context":{"text":"General Optics and Vacuum","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/general-optics-and-vacuum\/"},"img":{"alt_text":"Loosen-bottom-cap-set-screws","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2015\/02\/Loosen-bottom-cap-set-screws.jpg?fit=640%2C480&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1205,"url":"https:\/\/www.rbdinstruments.com\/blog\/11-010-electron-gun-control-operation-repair-info\/","url_meta":{"origin":1452,"position":4},"title":"11-010 electron gun control operation and repair info","author":"Randy","date":"August 9, 2014","format":false,"excerpt":"This post is a compilation of information that we have provided in some of our newsletters about the Physical Electronics 11-010 electron gun control. These units are typically found with the 10-150\/155 and 15-255G CMA auger and double pass x-ray photoelectron analyzers. As always, refer servicing to personnel trained to\u2026","rel":"","context":"In "Operation and Calibration Procedures"","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":1031,"url":"https:\/\/www.rbdinstruments.com\/blog\/20-805-analyzer-control-calibrations\/","url_meta":{"origin":1452,"position":5},"title":"20-805 analyzer control calibrations","author":"Randy","date":"April 7, 2014","format":false,"excerpt":"This post explains some tests and calibrations for the 20-805 analyzer control which is used on older Physical Electronics (PHI) ESCA, XPS and AES surface analysis systems. The 20-805 analyzer control is typically used to control the 15-255G and 25-260 double pass cylindrical mirror analyzers. 20-805 Analog AES Input Test\u2026","rel":"","context":"In "Operation and Calibration Procedures"","block_context":{"text":"Operation and Calibration Procedures","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/operation-and-calibration-procedures\/"},"img":{"alt_text":"analyzer-control-20805","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2014\/04\/analyzer-control-20805.jpg?fit=493%2C227&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1452"}],"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=1452"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1452\/revisions"}],"predecessor-version":[{"id":1499,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1452\/revisions\/1499"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/1453"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}