What exactly are you trying to see?
There has been a lot of interesting discussions on how to "safely" connect an oscilloscope to the AC Mains.
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So, what is your goal?
What are you trying to see on the AC?
What is your AC Mains voltage?
Is there a safety/protective ground?
What is your skill set? College electronics class? High school electronics class? Self taught by trail and error??
What is your age? That fits in with what is your skill set.
This isn't intended to be insulting, I was playing by shock and learn before formal education, a vocational school program that today grants Associate Degrees, then I worked for 2+ years before I was tricked into starting college for a BS in electrical engineering. Many (?most?) of the people in this group have similar informal education, followed by some form of formal training.
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We can offer advice for problems and goals we've all had but they are probably worthless to your goals.
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I repeat, if all you want to do is look at the 50/60Hz Mains waveform, why? There is nothing interesting about a 50/60Hz 'sinewave.' If all you want to do is to see an AC Mains waveform. I'll capture the 120V 60Hz AC Mains in our home with a PC sound card and my 9k:1k attenutator and post 60 seconds of 48K high resolution wav audio in the files section.
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My 9k:1K attenuator came from a project at work, I kept it and rebuilt it in a Budd minibox with a standard?
IEC C14 male connector with a female 1/4" stereo audio connector.?
Note: This is never used for RF, only for AF and has been used about 5 times in the last 30 years.
I keep it because it might be useful...someday.
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This is a link to the his oscilloscope
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I traded for a Zoyi ZT-701s, very similar to your unit.
Zoyi multimeter+oscilloscopes - ZT-70xS,
It is a two channel 'scope ' and works fine with my 9k:1k attenuator on the AC.
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But you can still fry your self if you aren't careful.
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Or
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The waveform will be so close to the AC mains you probably can't tell the difference.
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The only real difference will be AC Mains will have various distortion components that a pure waveform won't have, but you'll have extreme difficulty seeing the distortion on a scope, you'll need to feed the AC Mains to a PC sound card. Sample at 96K minimum, higher if possible, and do a high resolution FFT.
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And connecting the AC to a PC is a good way to fry a PC, PC inputs can not handle more then perhaps 3V peak to peak. And this is a whole new set of problems and nightmares.?
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