Deionizer flow restrictor inspection and cleaning procedure:<\/strong><\/h1>\nThe 04-500 and 04-548 15kV dual anode x-ray sources are water cooled by a closed loop radiant heat exchanger (model 16-020, 16-050) which includes a built in water filter and deionizer cartridge. Since the anode floats at 15kV, the water must be kept in a constant state of deionization to prevent leakage current. If the leakage current is more than 2 or 3 mA at 15kV of high voltage then the leakage current will start to affect the power regulation on the 32-095 or 32-096 X-ray source control. Normal leakage current (the current that is shown on the HV supply current meter when only the high voltage and no power is applied) should be less than 2mA @ 15kV. Once you get up to 3 to 5mA it is time to replace the water filter and deionizer cartridge.\u00a0 If the leakage is very high (10mA or more) then it is possible that the heat exchanger flow restrictor is plugged up.<\/p>\n
Part of the loop in the cooling flow directs about 10% of the water through the deionizer and filter. There is a flow restrictor just in front of the input to the filter and this flow restrictor can become clogged or corroded over time, resulting in reduced flow to the deionizer cartridge and subsequent increased leakage current.<\/p>\n
It is recommended that every time you replace the deionizer cartridge and filter (about once every 3 years is typical) that you inspect the flow restrictor and clean it out if necessary. If it is corroded you may need to drill it out with a tiny drill bit (about .030″).<\/p>\n
The pictures below show the location of the flow restrictor and how to remove it for inspection. If it is plugged up then drill it out with a small drill bit and clean it before reinstalling it into the flow restrictor connector<\/p>\n
This slideshow requires JavaScript.<\/p>
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Deionizer flow restrictor for PHI X-ray source heat exchangers This post is a reprint of a tech tip that we published in our fall 2008 Service Detail newsletter. This exact problem came up recently and so I thought I would … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1443,"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":[104,103,183],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2015\/04\/Flow-Restrictor-Inlet.jpg?fit=1280%2C960&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-ne","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":4085,"url":"https:\/\/www.rbdinstruments.com\/blog\/16-020-heat-exchanger-12-deionizer-cartridge-issue\/","url_meta":{"origin":1440,"position":0},"title":"16-020 heat exchanger 12″ deionizer cartridge issue","author":"Randy","date":"December 4, 2024","format":false,"excerpt":"The 16-020 heat exchangers are used with the older Physical Electronics (PHI) 5100 through 5400 X-ray photo-electron spectrometer (XPS) systems.The 16-020 has a built-in deionizer cartridge (and a particle filter) which keeps the water in the closed loop system clean and it also keeps the resistance of the water high.\u00a0\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\/2024\/11\/20241117_091000_resized.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":727,"url":"https:\/\/www.rbdinstruments.com\/blog\/heat-exchanger-preventive-maintenance\/","url_meta":{"origin":1440,"position":1},"title":"Heat exchanger preventive maintenance","author":"Randy","date":"July 29, 2013","format":false,"excerpt":"The 16-020 and 16-050 heat exchangers that are used with many Physical Electronics X-ray sources require a minimal amount of preventive maintenance to ensure that they provide sufficient cooling power. Typically, the only maintenance that is performed is that the water filter and deionizer cartridge are replaced when the leakage\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":"dirty-heat-exchanger-in-16050","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2013\/07\/dirty-heat-exchanger-in-16050.jpg?fit=612%2C816&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":4212,"url":"https:\/\/www.rbdinstruments.com\/blog\/16-020-050-heat-exchanger-shuts-off\/","url_meta":{"origin":1440,"position":2},"title":"16-020\/050 Heat Exchanger Shuts Off","author":"Randy","date":"February 5, 2026","format":false,"excerpt":"How to isolate the issue for when a 16-050 or 16-020 heat exchanger shuts down after a few seconds","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":"","width":0,"height":0},"classes":[]},{"id":2367,"url":"https:\/\/www.rbdinstruments.com\/blog\/replacing-the-water-lines-in-a-16-050-heat-exchanger\/","url_meta":{"origin":1440,"position":3},"title":"Replacing the water lines in a 16-050 heat exchanger","author":"Randy","date":"July 26, 2018","format":false,"excerpt":"In a previous post we showed you how to remove dust from the radiator in a 16-020 or 16-050 X-ray source heat exchanger For this post we will replace the flow switch, which is used in a 16-050 heat exchanger, and also replace all of the water lines.\u00a0 The water\u2026","rel":"","context":"In "X-ray Sources"","block_context":{"text":"X-ray Sources","link":"https:\/\/www.rbdinstruments.com\/blog\/category\/x-ray-sources\/"},"img":{"alt_text":"new line 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10-610 monochromator X-ray source anode and filaments.\u00a0 The 10-610 monochromator X-ray source is used in conjunction with the 10-410 or 10-420 monochromator.\u00a0\u00a0 When replacing the anode you should also replace both filaments and the deionizer cartridge (located in the 16-0XX heat exchanger).\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":"melted anode","src":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2018\/04\/melted-anode.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\/2018\/04\/melted-anode.jpg?fit=972%2C648&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2018\/04\/melted-anode.jpg?fit=972%2C648&ssl=1&resize=700%2C400 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