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Data Logger with EVC2X and PMD

Hello ElmorLabs

My name is David Ney. I work for the editorial office PC Games Hardware under Computec Verlag in Germany. We became aware of your products through the German extreme overclocker der8auer.

In my role I am responsible for processor testing and measuring power consumption is part of that as well. I therefore found your device exciting, as it can display and log the consumption of the CPU alone. For this I have now bought the PMD and the EVC2X, connected and wired everything and tried the Data Logger.

Unfortunately, all the data in the Data Logger is in one column. An evaluation by Excel is therefore not possible, without further ado. Have I perhaps overlooked something? How is it possible to display the individual data sets like "CPU Power" in individual columns so that one can evaluate the data?

For my work I mainly need the average of the measurements, and per data set there are quickly 500 individual measurements. I can not remove the "Timestamp" in the log for each row.

If questions or pictures are desired, I can submit them with pleasure.

Thanks for Help! 🙂 

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Hello Dave,

It sounds like you're opening the .csv file directly with Excel. That does not properly import the data. Don't ask me why Excel functions this way. You should instead create a new spreadsheet and use the import function (Data -> From Text/CSV). That will let you separate each value to its own column in Excel.

/Jon

Thank you for the quick reply. That actually works!

So the problem is already solved. Meanwhile, I noticed another thing: When I look at the logs, the EVC2X sometimes measures minus consumption and also some in the range of near zero. I've already done some research on the Internet and apparently a firmware update should help? Can you confirm this?

Thanks for Help! 

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Can you show a picture of the issue? It does sound somewhat similar to this: https://www.elmorlabs.com/forum/topic/evc2-beta-software/?part=8#postid-567 You can try the same steps and see if it helps.

Of course. Attached is a picture of the thing I mean. This is 100 percent load at CineBench R20. And the display sometimes shows me -5.3 watts. Is this a readout error? My understanding is that the watt line should stay permanently in the upper range of 140 watts, since the processor is permanently at 100 percent load at this time, see Task Manager. The voltage also goes below zero at times, which can't be as well.

Thanks for the help!

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Quote from PCGH_Dave on 2021-12-16, 15:57

Of course. Attached is a picture of the thing I mean. This is 100 percent load at CineBench R20. And the display sometimes shows me -5.3 watts. Is this a readout error? My understanding is that the watt line should stay permanently in the upper range of 140 watts, since the processor is permanently at 100 percent load at this time, see Task Manager. The voltage also goes below zero at times, which can't be as well.

Thanks for the help!

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Yes, it's an error when reading over the I2C bus. I'm working on reducing the error rate. I do have an update in the other thread which you can try: https://www.elmorlabs.com/forum/topic/evc2-beta-software/?part=9#postid-580

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