How true a sine wave?

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How true a sine wave?

Postby drstrip on Thu Apr 04, 2019 5:35 pm

I recently bought an oscilloscope for a project, so of course the first thing I did was check out the wave form from my FX inverters. Looks like this:
Image

Compared to a sine wave from utility power, this is nasty looking. Compared to a square wave, it's beautiful. Is this representative of FX output, or does this mean I have a problem somewhere?
This was captured with the invert very lightly loaded. I can't say whether this is the inverted leg of the auto-transformer.
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Re: How true a sine wave?

Postby Surfpath on Tue May 14, 2019 4:39 pm

Interesting. Have you used the same instrument to measure the sine wave from your local Grid? Perhaps that would be a quick & dirty way to informally "calibrate" your oscilloscope (if you still have it).

Has anyone else measured the sine wave from their outback inverters?
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Re: How true a sine wave?

Postby drstrip on Tue May 14, 2019 7:54 pm

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Re: How true a sine wave?

Postby jponathanstarr on Sun May 26, 2019 12:57 pm

I can't see any definitive steps. To me, that = good.
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