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New 2ch pocket DSO+SG - Zeeweii DSO2512G

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Aldo22:

--- Quote from: ptluis on September 26, 2023, 11:47:36 pm ---I received a message from zeeweii today, there will be no more firmware updates for this oscilloscope.  It seems that they gave up on improving it and adopted the model of all other sellers of this type of product, launching new products with 2 or 3 suggestions given by users and making a profit.  In any case, it continues to be the best of its kind in my opinion.

Aldo22 I will post the 1.2.8C and 1.2.8C+ firmwares tomorrow or the day after on this forum for you or others who wish to try, or keep a backup of the original 1.2.8C

--- End quote ---

Hi ptluis

I must say that I actually never expected a firmware update from Zeeweii.
The firmware doesn't have any serious bugs as far as I know and you can't really expect a feature upgrade for this price, especially since there are also different hardware versions of this device.

This may also open up "a can of worms" (bricked devices, mismatched FW-HW, support requests -> unhappy customers).
They would probably rather avoid that.

Therefore I am very surprised that there is a 1.2.8C+ and would like to try it out especially because of the calibration option.

Thank you!

ptluis:
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

!!! I won't assume any responsibility if you brick your scope for whatever reason!!
!! ZEEWEEI WON'T HELP YOU EITHER!!

If you don't trust me, DON'T DOWNLOAD! GO DRINK A BEER!
If you are happy with your scope the way it is, DON'T DOWNLOAD! GO EAT A BURGER AND TWO BEERS!
IF it's to complicated, stay still and then GO EAT ANOTHER BURGER AND THREE BEERS!
If OTHER reason, DRINK FOUR BEERS!!! AND BE HAPPY!!!!

:)

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\




----===!!! Zeeweei DSO2512g firmware upgrade. ONLY FOR SCOPES WITH ORIGINAL FIRMWARE V1.2.8C !!!===---

If your scope original firmware is NOT v1.2.8C DO NOT DOWNLOAD!!! OR TRY UPGRADING!!
YOU WILL BRICK YOUR SCOPE IF YOU DO IT!! YOU HAVE BEEN WARNED!!! IT'S YOUR RESPONSIBILITY!
Stop here and GO DRINK 5 BEERS!!!!

----=============================================================================----


!!!! Warning!!!! If you don't have a good and stable function generator stop here! and don't Upgrade firmware !!!!!




If your scope original firmware is v1.2.8C and you have a good and stable function generator, then continue reading



Upgrade_dso2512g.zip file contents:

- dso2512g_v1.2.8C.bin  (Original firmware of scope)

- dso2512g_v1.2.8C+.bin (Firmware Upgrade, Plus version)

- log.txt (how to use calibration and zoom features - Original instructions )

- Upgrade steps128c.txt  (How to upgrade - original instructions)


After downloading the file Upgrade_dso2512g.zip always run it through a virus scanner.
If you find other files besides those indicated above, delete it and find the original one posted by me on this forum.

---------------------------------------------------------------------------------------


<REQUIREMENTS:>

1. A good USB-C DATA cable!!! I had problems with the original cable supplied by Zeeweei, so beware!
2. Windows 7, 8, 10, 11 (don't ask me about MAC, I don't use it)
3. The Scope with the Battery fully charged
4. Function generator to calibrate the scope 2.5Vpp 1KHz sine waveform

!!!! Warning again!!!! If you don't have a good and stable function generator stop here! and don't Upgrade firmware!!!!!



<PROCEDURE:>

1. With the scope in OFF state, press and hold [mv] and [Power] buttons at same time to start scope in "upgrade mode"
 
2. After a few seconds, the firmware upgrade picture (or a menu) appears on the screen, depending how old is your unit.

3. Connect scope USB-C to computer USB port using a GOOD USB-C DATA cable.

4. A Udisk appears on the computer (like a USB flash drive).

5. Copy dso2512g_v1.2.8C+.bin to the Udisk.

6. Disconnect Udisk from computer using "Safely Remove Hardware icon" on the taskbar! (don't disconnect USB-C cable without this step!)

7. Disconnect USB-C cable from computer and scope (**very important**, don't leave them connected!!).

8. Click the [Power] button and then click the [OK] button (on some scopes a menu appears with the option to shutdown)

9. Shut down and restart.

10. Scope will show upgrading process. When done, restart or follow the instructions on Screen.

11. THEN you will need a function generator to calibrate the scope, follow the instructions


Done!
Your firmware is upgraded to v1.2.8C+  (plus version)


NEW FEATURES:
-------------

< ZOOM MODE >:

 PRESS "s" key for 2 secs to enter this mode. To exit press again for 2 secs
 Zoom is not supported when roll mode or cursor is on
 Always exit zoom mode before shutdown scope, there's a bug that resets some scope settings

< CALIBRATION >:

Entering this mode could be a little tricky, but after you understand it, it's easy
Refer to file log.txt for instructions
In this file CH1CH2 means you select the desired channel for calibration
You can enter this mode whenever you want

The plus firmware allows you to enter this hidden function where you can manually adjust the values of the Vpp and Mean to correct the displayed values if they are out of specs. That's how they calibrate measurements on this scope

It's really useful, my scopes where some 0.3V to 0.5V off in Vpp measurements


NOTE:
RMS measurements will show different, for ex: Before upgrade 1Vpp=740mV RMS, after upgrade 1Vpp=380mV RMS (no math involved by me at those examples) Not true, ignore this. It was based on other user post that won't match commented text. The RMS values are correct.

Test Frequency: 500Hz, 1Vpp, Sine and Square wave, RMS values

DSO2512G (Firmware 1.2.8.C+)
Sine wave: 349mV RMS
Square wave: 491mV RMS



BUGS:

ZOOM MODE:
1. if you press AUTO while in ZOOM MODE, mostly above 500KHz, the scope when zooming out (pressing "s" key), freezes and then crashes). It will restart OK.
Solution: do not press AUTO while in ZOOM MODE

2. If you shutdown scope in zoom mode, there's a bug that resets some scope settings
Solution: Always exit zoom mode before shutdown scope


And that's it!


Sorry for any mistakes but I'm not English native :)

Aldo22:
Thank you for sharing this with us! Much appreciated. :clap:  :-+

I won't rush anything, because first I want to grasp a few more things, especially I need to see if I can provide a reliable VPkPk reference at all.

E.g. you say "RMS measurements will show different, for ex: Before upgrade 1Vpp=740mV RMS, after upgrade 1Vpp=380mV RMS"

I don't see that with my "old" version (->image).
Was your Zeeweii maybe in DC mode and the Signal had a DC offset? 

But I must also say that I don't quite understand the relationship between RMS and PkPk within the Zeeweii and to the An870 (my best reference).

For example these measurements at 1kHz:

The signal comes from FY3224S (amplitude is not precise, I think) measured with AN870 and Zeeweii.
Trying to get as close as possible to 1V with the FY3224S steps.

Trying to take the Zeeweii as Reference for 1 VPkPk:

--- Code: ---Zeeweii  : 0.997 VPkPk / 0.340 Vrms
An870   : 0.3644 Vrms
FY3224S: 1.05 V

--- End code ---

Trying to take the An870 as Reference for 0.3536 Vrms (Should be theoretically correct at 1 V sine, right?)

--- Code: ---An870   : 0.3546 Vrms
Zeeweii  : 0.981 VPkPk / 0.331 Vrms
FY3224S: 1.02 V

--- End code ---

Internal Generator of the Zeeweii at 2.5 V/1kHz

--- Code: ---Zeewei: 2.51 VPkPk / 0.859 Vrms
An870 : 0.8909 Vrms

--- End code ---

So: I have no problem with the Zeeweii being slightly off from the AN870, that's why we want to adjust it.
What I don't understand is why the Zeeweii calculates the way it does internally.
1VPkPk sine should correspond to 0.3536 Vrms and not 0.340 Vrms.



Could someone shed some light on this?
I would like to understand this first, otherwise it doesn't make sense since I only have the AN870 as a Vrms reference and no VPkPk measurement with more precision.

Thank you!

Aldo22:
I have more questions and thoughts about this.
@ptluis: I don't expect you to answer all my questions.
But if you feel like it and have time and know the answer, of course I'm happy.  :-+

1. you mention Windows and Mac as PC for the update. Was it said by Zeeweii that it doesn't work on Linux? I use Linux and have no problem with downloading screenshots from the Zeeweii, for example.

2. is one forced to calibrate/adjust after the FW update or does the measurement work as before?

3. how is the automatic calibration via menu related to this manual calibration?

4. is point 5 of the update procedure something that makes sense in the context of the update menu or is it meant "blindly"? ("Click the "Power" button, and then click the "ok" button.")

Thank you!

ptluis:

--- Quote from: Aldo22 on September 28, 2023, 11:28:17 am ---I have more questions and thoughts about this.
@ptluis: I don't expect you to answer all my questions.
But if you feel like it and have time and know the answer, of course I'm happy.  :-+

1. you mention Windows and Mac as PC for the update. Was it said by Zeeweii that it doesn't work on Linux? I use Linux and have no problem with downloading screenshots from the Zeeweii, for example.

No! I said can't help with MAC because I don't use Macintosh. I did it in Windows OS. I don't use linux but I suppose the principle is to connect the scope to the computer, mount it  (I think in linux is how you do it) to be able to copy the bin file into Udisk of the scope. Then Unmount it, remove cable and boot the scope so that it will detect a new firmware and update it by himself. BUT you know better then I how to operate linux. I don't use linux for many years so I'm outdated.


2. is one forced to calibrate/adjust after the FW update or does the measurement work as before?

From what I recall, after the scope updates the firmware, when he boots he will enter calibration mode automatically, but I remember it show the previous values. BUT I always did the calibration as asked, so I supposed it will keep the old values, can“t say for sure.

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

4. is point 5 of the update procedure something that makes sense in the context of the update menu or is it meant "blindly"? ("Click the "Power" button, and then click the "ok" button.")

This procedure is necessary if your scope doesn't display the update menu, it happened in one scope from the 5 I updated, maybe that one was a clone? I don't know but it function like the others.

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 .

Thank you!

--- End quote ---

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