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Aldo22:

--- Quote from: naiclub on February 14, 2024, 07:20:59 pm ---Zeeweii DSO3D12 can directly measure 220V electricity? Are the signal lines overflowing the screen or not?

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Max voltage ±40V(x1), ±400V(x10)
The measurable voltage range of 10X range is 600V(DC+AC). (from user manual)

I only have a DSO2512G and it could show up to 8kV in x100 mode. Not sure about the similar DSO3D12.

But I wouldn't try it.  ;)
alm:

--- Quote from: naiclub on February 14, 2024, 07:20:59 pm ---Zeeweii DSO3D12 can directly measure 220V electricity? Are the signal lines overflowing the screen or not?

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Don't use these cheap scopes that may or may not lie about their specs with equally cheap probes for measuring mains. This requires more reliable equipment and especially more experience than this question implies. What are you expecting to see on a scope anyway? Use a decent DMM to measure mains, and just use these scopes for lower voltages.
naiclub:
Because most repair work I use to measure. It is a power converter from a battery. It is 220VAC electricity (in order to see a pure waveform). See that the waveform is not distorted. It must always come out beautiful and display a frequency of 50Hz.
which the measured scope is now ZOYI-702https://drive.google.com/file/d/1xgQMMxsRU6Fo8YkoVMHfjo47ohSRXH5f/view?usp=drive_link
csuhi17:

--- Quote from: naiclub on February 14, 2024, 07:20:59 pm ---Zeeweii DSO3D12 can directly measure 220V electricity? Are the signal lines overflowing the screen or not?

--- End quote ---

is there any oscilloscope that can measure 230VAC in 1:1?
So far I've only looked at low-end scopes, but I haven't seen one among them.
I would not use the factory test lead to measure the main voltage, not least because of the bare metal part of the BNC connector.
naiclub:
1:1 Can't measure it, sir. Must be adjusted at 10:1 If you still insist, 1:1 will be used to measure. I think there might be smoke rising from the scrope.
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