Products > Test Equipment
New 2ch pocket DSO+SG - Zeeweii DSO2512G
Aldo22:
--- Quote from: ptluis on September 29, 2023, 07:37:19 pm ---I'm glad everything went smoothly my friend. You can easily calibrate de measurements latter, is a little tricky to enter into that mode, but i think you can do it without much problems.
Enjoy your "new" scope!
--- End quote ---
Thank you!
Here you can see my improvised adjustment setup, including 1980s programmable Pocket Computer Casio FX-710P. :-DD
The Casio is still useful to do e.g. quick RMS -> PkPk conversions.
So far, the accuracy looks very good.
Only in the negative DC range I probably won't get it right.
But well, it is an oscilloscope, not a voltmeter. ;)
ptluis:
--- Quote from: Aldo22 on September 29, 2023, 10:54:30 pm ---
--- Quote from: ptluis on September 29, 2023, 07:37:19 pm ---I'm glad everything went smoothly my friend. You can easily calibrate de measurements latter, is a little tricky to enter into that mode, but i think you can do it without much problems.
Enjoy your "new" scope!
--- End quote ---
Thank you!
Here you can see my improvised adjustment setup, including 1980s programmable Pocket Computer Casio FX-710P. :-DD
The Casio is still useful to do e.g. quick RMS -> PkPk conversions.
So far, the accuracy looks very good.
Only in the negative DC range I probably won't get it right.
But well, it is an oscilloscope, not a voltmeter. ;)
--- End quote ---
wow the Casio is piece of art! I had one in my school days. Really nice to see one working :-+
For DC you set your FG to DC wave and adjust until Mean measure on scope get equal or close to the set value. You could use your multimeter at same time for a more precise adjustment.
Aldo22:
--- Quote from: ptluis on September 29, 2023, 11:56:58 pm ---wow the Casio is piece of art! I had one in my school days. Really nice to see one working :-+
--- End quote ---
Yes, it's a cute thing!
It looks like new and works like new (see attachment).
It must be 40 years old soon.
I like the dedicated buttons more than touch screens and it's very straightforward to use for programmed calculations like this.
--- Quote from: ptluis on September 29, 2023, 11:56:58 pm ---For DC you set your FG to DC wave and adjust until Mean measure on scope get equal or close to the set value. You could use your multimeter at same time for a more precise adjustment.
--- End quote ---
Have you tried this out yet?
The problem is that if it's accurate for DC+, it's not equally accurate for DC-. I can only change one offset though.
Probably a hardware thing (of my HW version?).
On the other hand, let's not exaggerate. It's maybe 3-4% off in the negative DC range.
As I said, it's not a voltmeter.
Thanks.
ptluis:
--- Quote from: Aldo22 on September 30, 2023, 07:34:37 am ---
--- Quote from: ptluis on September 29, 2023, 11:56:58 pm ---wow the Casio is piece of art! I had one in my school days. Really nice to see one working :-+
--- End quote ---
Yes, it's a cute thing!
It looks like new and works like new (see attachment).
It must be 40 years old soon.
I like the dedicated buttons more than touch screens and it's very straightforward to use for programmed calculations like this.
--- Quote from: ptluis on September 29, 2023, 11:56:58 pm ---For DC you set your FG to DC wave and adjust until Mean measure on scope get equal or close to the set value. You could use your multimeter at same time for a more precise adjustment.
--- End quote ---
Have you tried this out yet?
The problem is that if it's accurate for DC+, it's not equally accurate for DC-. I can only change one offset though.
Probably a hardware thing (of my HW version?).
On the other hand, let's not exaggerate. It's maybe 3-4% off in the negative DC range.
As I said, it's not a voltmeter.
Thanks.
--- End quote ---
Your casio looks like new, it's a nice piece of engineering, I used one maybe 40 years ago, it was a luxury owning one at that time. Mine didn't last so much time maybe 20 or so much years.
About the DC calibration I only adjusted the positive DC. I adjusted the Mean measurement of the scope to be as close as possible to the DC signal Voltage, i also used a multimeter in this case UT61E at same time to certify the correct DC value. you can adjust Vpp or DC independently. I was able to adjust each value with a precision of 2 digits in the mV range. But of course this is a cheap scope and may occur some deviation when it's not operated in ideal temp, but anyway it's according to specs. It's not a multimeter but it's enough for many task and I can save my good equipment in situations where a mistake could blow it.
Aldo22:
--- Quote from: ptluis on September 30, 2023, 01:13:44 pm ---About the DC calibration I only adjusted the positive DC. I adjusted the Mean measurement of the scope to be as close as possible to the DC signal Voltage, i also used a multimeter in this case UT61E at same time to certify the correct DC value. you can adjust Vpp or DC independently. I was able to adjust each value with a precision of 2 digits in the mV range. But of course this is a cheap scope and may occur some deviation when it's not operated in ideal temp, but anyway it's according to specs. It's not a multimeter but it's enough for many task and I can save my good equipment in situations where a mistake could blow it.
--- End quote ---
Yes.
After some fiddling, I am happy now. :-+
The effort with the upgrade was worth it.
Attached are a few examples: 50mV, 100mV, 500mV, 5V, 20V (Roughly, the SG has steps), and DC: +2V, +3V, +5V.
Considering that the signal comes from the cheap FY3224S, it is very satisfactory.
Thanks again.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version