Rog Posted February 18, 2020 Report Share Posted February 18, 2020 So we have several of the unistream units out there. But recently the last 2 we built with the exact program on them. Are having issues with analog inputs. They started to jump all over the place. Tried different signal wires same reading. Multi meter run series and analog signal not jumping all over the place, just smooth reading. I don't know if it the modules or the last firmware update. Was wondering if you guys had any thoughts. Thanks Rog Quote Link to comment Share on other sites More sharing options...
MVP 2021 Ausman Posted February 18, 2020 MVP 2021 Report Share Posted February 18, 2020 Have you run your meter over all the power and earth lines? Modules are commoned to the supplies providing the sensors? cheers, Aus Quote Link to comment Share on other sites More sharing options...
AlexUT Posted April 10, 2020 Report Share Posted April 10, 2020 Hi Rog, Please find a scope and check if there are EMI at modules inputs. Please add connection diagram. B.R. Quote Link to comment Share on other sites More sharing options...
dierkens Posted July 27, 2022 Report Share Posted July 27, 2022 I know this is an old post but we're having a similar problem and wanted to know if the OP ever resolved this issue. We've got it setup in an engineering office with no high power sources nearby. The signal wires placed into another device don't show this fluctuation at all. If I don't get a response I'll create a new post. Quote Link to comment Share on other sites More sharing options...
MVP 2021 Joe Tauser Posted July 28, 2022 MVP 2021 Report Share Posted July 28, 2022 You may have common mode noise. I always ground the 0V of my 24V power supply to whatever AC source is powering it. If that doesn't help, get your scope out. Forward your request to Official Unitronics Support - support@unitronics.com. Joe T. Quote Link to comment Share on other sites More sharing options...
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