J L M Posted May 11, 2012 Report Share Posted May 11, 2012 Seems like I read about this before but when I searched I couldn't find it. My CTSW's amp meter bounces around from a -4 up to +4 or 5. what causes this and what should it be reading? The volts stay pretty close to 13.2 . tks for any response Link to comment Share on other sites More sharing options...
Roger Lee Posted May 12, 2012 Report Share Posted May 12, 2012 This jumping around is fairly normal in many applications with an amp meter. Do not worry about it and your numbers are normal from what I see in the field. Part of our number hopping with our Dynon readings is the way Dynon instruments sample the sensor readings and the speed at which that happens. Link to comment Share on other sites More sharing options...
J L M Posted May 13, 2012 Author Report Share Posted May 13, 2012 Thanks, Roger , I appreciate your help. Didn,t think it was too serious but just wanted to make sure Link to comment Share on other sites More sharing options...
Tonym Posted May 16, 2012 Report Share Posted May 16, 2012 I recently purchased a 07 ctsw test flight when great. However the next flight I heard feed back in headsets and also noted that the dynon amp was jumping from -45 to +45 amp and all over the place. I saw posted about checking grounds but where are all the main grounds to check? Link to comment Share on other sites More sharing options...
Roger Lee Posted May 16, 2012 Report Share Posted May 16, 2012 Hi Tony, It does sound like a grounding issue. There are 5 ground sites to tighten. Consider all grounds hand tight, but wrench loose. The grounds are in the engine compartment. On the battery side. There is one on the engine frame, under the starter silynoid, under the reg/ rectifier, tighten the negative on the battery. Last but not least there is one up high on the firewall on the same side that goes through into the instrument panel. Pull the passenger side instrument panel face off. The ground is all the way in the back. That is a culprit many times. Tighten this tight. Link to comment Share on other sites More sharing options...
Tonym Posted May 17, 2012 Report Share Posted May 17, 2012 Thanks. Roger I will try later today Link to comment Share on other sites More sharing options...
Tonym Posted May 21, 2012 Report Share Posted May 21, 2012 Roger just wanted to let you know you were dead on. The ground at the firewall was loose, I tighted it up and problem was fixed. Thanks so much! Link to comment Share on other sites More sharing options...
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