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New 2ch pocket DSO+SG - Zeeweii DSO2512G

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Aldo22:

--- Quote from: chemary on April 27, 2024, 04:36:57 pm ---
--- Quote from: Sham73 on April 27, 2024, 03:55:35 pm ---
--- Quote from: Aldo22 on April 27, 2024, 09:13:17 am ---That's OK, just don't overdo the calibration, it won't be like a multimeter.

--- End quote ---
For calibration, I need a more or less accurate laboratory power supply and a functional signal generator, which I don’t have.

--- End quote ---
If you don't want to spend much, I purchased a cheap device like this one https://www.aliexpress.com/item/1005006786894152.html it comes with a hand written paper with the real measured values with good equipment and also states the date and temperature when they were done, it can be used to know how good are the measures of your equipment.

--- End quote ---

That's certainly nice, but only DC (afaics) and you don't really need that kind of accuracy for the scope.
An average multimeter is perfectly adequate as a comparison.
The scope only has to display approximately the same as the multimeter. So not exactly 1.0000V but e.g. with a battery 1.5xV or 9.xxV

But Autocal is also sufficient imo.

By the way, an FY3224s also has a DC mode and you can output -10V to +10V DC. If you compare this with a multimeter, it should be accurate enough as a reference for the scope.
Of course it can do sine, square etc. anyway.

Sham73:

--- Quote from: chemary on April 27, 2024, 04:36:57 pm ---
--- Quote from: Sham73 on April 27, 2024, 03:55:35 pm ---
--- Quote from: Aldo22 on April 27, 2024, 09:13:17 am ---That's OK, just don't overdo the calibration, it won't be like a multimeter.

--- End quote ---
For calibration, I need a more or less accurate laboratory power supply and a functional signal generator, which I don’t have.

--- End quote ---
If you don't want to spend much, I purchased a cheap device like this one https://www.aliexpress.com/item/1005006786894152.html it comes with a hand written paper with the real measured values with good equipment and also states the date and temperature when they were done, it can be used to know how good are the measures of your equipment.

--- End quote ---
I have such.  I purchased it to determine the accuracy of my Owon B41T+ multimeter.  It only has four values ​​from 2.5 to 10 VDC, so I didn't mention it.

yrambler2001:
Looks like a new version V10.1-III with firmware v2.0.3-III

yrambler2001:
looks like they are using ag32vf303cct6 MCU+FPGA
and opa2673 opamp

Panchez:
I received exactly the same device. From the first minutes it glitches, freezes, reboots. Sometimes immediately, sometimes it can work for 5-10 minutes. It does not depend on whether there is a signal at the input or not. Firmware 2.0.3-III

Now I turned on the generator, while it is working, I hope the glitch is in the new firmware, maybe it will be possible to achieve more or less stable operation in this mode. Of course, it may not be in the firmware, I opened it and looked under a microscope, everything is well soldered.

It is strange that there are no updates on the manufacturer's page.

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