JohnBee Posted June 27, 2016 Share Posted June 27, 2016 I know the scope can measure RMS AC/DC but I wanted to know if it was also possible to measure simple AC or DC voltage using the defined measurement panel? Link to comment Share on other sites More sharing options...
attila Posted June 27, 2016 Share Posted June 27, 2016 Hello, For simple AC and DC measurements you can apply to the Logger tool which uses the Scope inputs. Link to comment Share on other sites More sharing options...
JohnBee Posted June 27, 2016 Author Share Posted June 27, 2016 6 hours ago, attila said: Hello, For simple AC and DC measurements you can apply to the Logger tool which uses the Scope inputs. Hi attila, and thanks for the response. For the Logger inputs, are we to use one probe(channel) for the input? That said, on the measurement side, I'm not seeing simple AC; simple DC, AC RMS and true RMS per channel. Is there a setting or adjustment to view simple AC also? Link to comment Share on other sites More sharing options...
JohnBee Posted June 27, 2016 Author Share Posted June 27, 2016 8 hours ago, attila said: Hello, For simple AC and DC measurements you can apply to the Logger tool which uses the Scope inputs. Just wanted to update to say that I can't seem to get any readings from the Logger tool with Waveform 2015 r3.3.5 ie, Connecting probe to ch 1, attaching to 5v DC source returns nothing Connecting probe to ch 1 and 2, with 5v source, returns nothing also I tried with different probes just to be sure. Though the results are the same Link to comment Share on other sites More sharing options...
JohnBee Posted June 27, 2016 Author Share Posted June 27, 2016 Another update, and in an attempt to identify the issue(user or otherwise) I downgraded the software increimentally down to 3.1.5 and found that the Logger does show activity on the Meter side with DC, though the readings appear significantly skewed. That said, and with this in mind, is it possible that my device is not working properly? I've had my doubts about the unit since it arrived as it appears to have been erratic in function. Sometimes working, sometimes not without changing settings etc. Which leads me to ask if there's a diagnostic tool I could run on the Discovery 2 itself to test it? Link to comment Share on other sites More sharing options...
JohnBee Posted June 27, 2016 Author Share Posted June 27, 2016 PS. the output source for the tests was confirmed using a conventional DMM Link to comment Share on other sites More sharing options...
attila Posted June 28, 2016 Share Posted June 28, 2016 The "simple AC" is the AC RMS. It is very unlikely to be a problem with the device since these are thoroughly tested during the factory calibrations process. Make sure to have common ground between your voltage source and device. In case you are using the BNC adapter make sure to have the jumper on DC coupling. Link to comment Share on other sites More sharing options...
JohnBee Posted June 28, 2016 Author Share Posted June 28, 2016 Thanks for the response. As it turns out, I discovered that my BNC adapter was the culprit. I removed it and everything came to life (as intended). Though I'm still not sure what is causing the anomalies at the moment. Though the moment I remove the module, everything displays as it should(voltage, waveforms etc). And so I guess this is good news in that I don't have to send in my unit for repair. Link to comment Share on other sites More sharing options...
attila Posted June 28, 2016 Share Posted June 28, 2016 Most probably the Scope AC/DC coupling jumper on the BNC adapter is on AC position. Link to comment Share on other sites More sharing options...
JohnBee Posted June 28, 2016 Author Share Posted June 28, 2016 Actually I was trying to use the 1 and 2 + /- off the BNC module. which was messing-up my readings. - Lesson learned. PS. it might be helpful to add a note in the BNC module to highlight the pin-out changes. Not sure if it's indicated in the overview etc. but I missed this, and it cost me alot of time and effort in trying to get things setup properly. Link to comment Share on other sites More sharing options...
Quiggers Posted July 1, 2016 Share Posted July 1, 2016 Hi JohnBee, Are you referring to the scope inputs being differential on the discovery and the bnc adapter routing the -ve input to gnd? I'm thinking of making a differential version of the bnc adapter. If it works I'll leave a link to osh park so that others can build their own. Link to comment Share on other sites More sharing options...
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JohnBee
I know the scope can measure RMS AC/DC but I wanted to know if it was also possible to measure simple AC or DC voltage using the defined measurement panel?
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