Hi LukeIt's a little late in the day for the UK folk but if you can setup TeamViewer and pm me the login I can take a look and update UK service as to what might be the best course of action.Best regards Nick.. Nick Collins Elemental MS Inc.12430 N Dowling Rd.College Station Texas 77845 (888) 476-4767 ISO-IRMS (979) 595-7625 Cell -------- Original message -------- From: "Harrold, Luke David" <[log in to unmask]> Date: 02/03/2017 10:25 AM (GMT-06:00) To: [log in to unmask] Subject: [ISOGEOCHEM] Sercon 20-20 Misbehaving Ion Repeller Hello All, I am having a bit of an issue with my Sercon 20-20. It turns 23 years of age this month so I fully appreciate that it may have a few ‘quirks’ by now. After having issues with the focus amongst many other issues I have changed the source board, the digital board and the adapter board in the last month or so and I still have an issue with the ion repeller. When set at ‘0’ I get a set point reading of ‘6.77’ and an actual of ‘16.54’, I changed the setting in the software to ‘-2’ and the set points and actuals did not change. I have checked for continuity within the source itself and from the source board to the source and there is no issue. I am at a loose end now…help me…any ideas? Luke Harrold Research Technician Soil Isotope Group Office: G09 Labs: G.01,G.05 and G.34 School of Biological Sciences, Cruickshank Building, University of Aberdeen, St Machar Drive, Aberdeen AB24 3UU The University of Aberdeen is a charity registered in Scotland, No SC013683. Tha Oilthigh Obar Dheathain na charthannas clàraichte ann an Alba, Àir. SC013683.