Products > Test Equipment
New 2ch pocket DSO+SG - Zeeweii DSO2512G
Aldo22:
--- Quote from: ptluis on September 29, 2023, 08:45:50 am ---Compare your results with my results. As you see Zeeweii is not to apart from the Siglents scopes
--- End quote ---
Yes, I actually find it amazingly precise for such a basic device.
I'll check everything with the FY3224S, which I've only had for a few days.
This is also a basic device, but at least it can generate 20Vpp and DC offsets (also negative) etc.
I will check whether there are deviations in the various vertical sensitivities.
How accurately it measures DC and negative DC, how the two channels match etc.
If I find substantial deviations (>2-3%) I will do the update, otherwise maybe later or never.
ptluis:
--- Quote from: Aldo22 on September 29, 2023, 08:32:22 am ---Thank you for the answers! :-+
--- Quote from: ptluis on September 28, 2023, 09:36:05 pm ---3. how is the automatic calibration via menu related to this manual calibration?
Automatic calibration is part of the upgrade procedure, after the scope updates the firmware it enters the calibration mode automatically. You can always enter this mode manually
--- End quote ---
I would be interested to know if it affects the same parameters. Does a manual calibration override the automatic calibration and vice versa?
Have you ever tried a downgrade to the original version?
Will an automatic calibration make everything normal again, or were parameters manually changed that I can no longer reach with the original version?
--- Quote from: ptluis on September 28, 2023, 09:36:05 pm ---If you don't feel confident and are happy how your scope operates, honestly you shouldn't do it. Like I said you need to have a stable FG so that calibration is done properly .
--- End quote ---
I actually think that a FY3224S would be sufficient.
It is not very accurate to adjust, but it generates a stable 1 kHz sine wave at ~2.5 Vpp.
I can adjust the amplitude (mV) using the An870.
The feeltech AWGs can also be adjusted, but I'm not sure that makes much sense.
I would like to try it, but actually my DSO2512G is not that far off on the measurements. I'm not sure if I can even get it to be more accurate.
And so I'm still hesitant... :-\
Thank you.
--- End quote ---
I see we are having a communication problem :) "Automatic calibration" means the scope enters into the calibration function automatically BUT you need to adjust the values manually. It's the same as manual mode. Entering this function automatically after upgrading the firmware is part of the upgrade procedure.
I never downgrade to the original firmware, zeeweii sent me the original firmware in case i wanted to revert back. I won't revert back because this firmware is stable and doesn't mess with the other functions, just adds zoom and the hidden calibration function
Like i said before if you like the way your scope works be on the safe side and Don't upgrade. if one day for some reason you see your scope is way out of specs you have the firmware and try it.
ptluis:
--- Quote from: Aldo22 on September 29, 2023, 09:03:57 am ---
--- Quote from: ptluis on September 29, 2023, 08:45:50 am ---Compare your results with my results. As you see Zeeweii is not to apart from the Siglents scopes
--- End quote ---
Yes, I actually find it amazingly precise for such a basic device.
I'll check everything with the FY3224S, which I've only had for a few days.
This is also a basic device, but at least it can generate 20Vpp and DC offsets (also negative) etc.
I will check whether there are deviations in the various vertical sensitivities.
How accurately it measures DC and negative DC, how the two channels match etc.
If I find substantial deviations (>2-3%) I will do the update, otherwise maybe later or never.
--- End quote ---
Turn your FG on at least 15 minutes, before doing any kind of calibration so that it stabilize in operating temperature
Aldo22:
--- Quote from: ptluis on September 29, 2023, 09:04:25 am ---I see we are having a communication problem :) "Automatic calibration" means the scope enters into the calibration function automatically BUT you need to adjust the values manually. It's the same as manual mode. Entering this function automatically after upgrading the firmware is part of the upgrade procedure.
--- End quote ---
Yes, communication problem. ;D
Let's try with a picture.
I mean by "automatic calibration" what you can trigger in the "Aux" menu. (-> Attached photo).
My question is: Does a manual calibration override the automatic calibration (from the "Aux" menu) and vice versa?
ptluis:
--- Quote from: Aldo22 on September 29, 2023, 09:17:10 am ---
--- Quote from: ptluis on September 29, 2023, 09:04:25 am ---I see we are having a communication problem :) "Automatic calibration" means the scope enters into the calibration function automatically BUT you need to adjust the values manually. It's the same as manual mode. Entering this function automatically after upgrading the firmware is part of the upgrade procedure.
--- End quote ---
Yes, communication problem. ;D
Let's try with a picture.
I mean by "automatic calibration" what you can trigger in the "Aux" menu. (-> Attached photo).
My question is: Does a manual calibration override the automatic calibration (from the "Aux" menu) and vice versa?
--- End quote ---
No no no! we are talking about different things here. The calibration added to the plus firmware is a function to adjust the measurements values, meaning the Vpp and Mean. it's all explained in the log.txt file. The auto calibration you show in picture is another thing and you should do it after the firmware upgrade steps completed at least i did it.
The plus firmware allows you to enter a hidden function where you can manually adjust the values of the Vpp and Mean measurements to correct the displayed values.
This function is usefull if for example after an automatic calibration (the one you show in picture) to make corrections on the values displayed in Vpp and Mean . This is how they calibrate the measurements on this scope.
The auto cal you show in picture must be done if you change places or when temperatures changes
I hope i made myself clear this time
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