New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)

[Veteran68]

Same issue. The firmware file is 626K and there's only 592K of 608K total available.

The 702S firmware update was only 364K. Sounds like someone forgot to add a bit more flash memory to account for the 703S firmware size. Or else forgot to strip symbols or something from this build.

[Randy222]

No issue here upgrading 703 to v127

702 latest appears to be v58, about half size of the 703 v127

But, no need to power up holding buttons.

Turn on 703
cable to PC
goto scope mode, menu, scroll to USB, select it
dump the ZTK into the "firmware" folder, it will then update with progress bar and then reboot

For the mem issue 703's, do you have any data or pic files in any of the folders?

[Veteran68]

No, there is nothing in the flash drive other than an empty firmware folder and the hidden system folder that Windows always adds. Besides that, the total folder capacity isn't big enough to contain the firmware update file. It's only 608K total, with 592K free. The firmware file is 626K.




How big is the RAM volume on your 703S?

[Altair8800]

@Veteran68 and everybody else...

Randy222 gave me a clue...

Do this FORMAT the device (this will clear out images)...



Then in the oscilloscope Menu system go to USB and click the F3 button to Enter it...

Then Drag and Drop (copy) the ZOYI-703S-FW-V127(1).ZTK to the FIRMWARE folder




ZT-703S "should" say upgrading do not power off... 

Voila... It should be upgraded...

Note1:  When I first tried upgrading firmware (which failed) it said RAM and then the newly assigned Drive Letter for the ZT-703S.  This time after doing FORMAT it says FLASH and the newly assigned drive letter and gave more folders (Application, data, log, pic) in addition to firmware and System Volume Information folders.

Note2:  I wish Zotek people would have a Change Log or History (of what changes they made) so we do not have to guess...

Note3:  I also wish Zotek had it where you can go back older version (in case something goes wrong).

[Altair8800]

Same issue. The firmware file is 626K and there's only 592K of 608K total available.

The 702S firmware update was only 364K. Sounds like someone forgot to add a bit more flash memory to account for the 703S firmware size. Or else forgot to strip symbols or something from this build.

Addendum: After you go to Oscilloscope Mode, then press MENU and do a FORMAT of the ZT-703S, and then go to USB mode, in Windows File Explorer it will show something like FLASH E:\ and if you click properties, it will show unit memory has 16 MB.



Note:  Again, your drive letter might be different (like D:\ or F:\ or other) because likely windows auto assign next available free drive letter and your computer might be differently partitioned than mine)

[kwass]

Note2:  I wish Zotek people would have a Change Log or History (of what changes they made) so we do not have to guess...

Take a look here: https://www-dt830-com.translate.goog/thread-8262-1-1.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp&_x_tr_sch=http

Change Log for the prior version but not this latest one.  There's a bunch of info about all the Zoyi products on this forum if you more up a level or two.

[Randy222]

I did no formatting, my 703 is out-of-box, less the v127 I just installed.

My win10 shows 703 flash drive as "14.393MB capacity". I will assume the 703 has a 16MB ram/rom chip.
With v127 installed flash drive shows just north of 10MB as free, and just north of 3MB as used.

[Veteran68]

This is all very interesting. I wonder why some of ours show such a small 600K "RAM" volume when the apparent capacity should be ~16MB. As I said, and as you can see from my screenshots, other than some hidden 16K filesystem overhead there's nothing in mine.

When I get home today I'll try to format approach and see what happens. Odd that it doesn't come formatted out of the box, yet has the firmware folder in place like it's been prepared to received fw updates.

[Altair8800]

I did no formatting, my 703 is out-of-box, less the v127 I just installed.

My win10 shows 703 flash drive as "14.393MB capacity". I will assume the 703 has a 16MB ram/rom chip.
With v127 installed flash drive shows just north of 10MB as free, and just north of 3MB as used.

My hunch is that maybe you (Randy222) upgraded the firmware right away therefore you had no problem.  Whereas Veteran68 and I maybe saved a few waveforms testing out the device.  Because of this maybe this altered things and/or even though we deleted the waveform pics that they still took up some space or cache (not 100% certain on this).  Anyway seems like if you do a FORMAT this clears out everything which then give you room to do the firmware install...

@Katie/kwass
That Chinese forum board DT830 link is actually referring to the new 703S.  Seems like they are actively and quickly trying to find bugs and fix them as soon as possible.

One thing to note with the Ver 1.27 firmware upgrade, it seems to fix the problem in which if you were in MultiMeter Mode and you turn off the unit it will likely default to Oscilloscope Mode.  Now whatever Mode you were in when you turned off the machine (or assume auto-off) that when you restart it will go to the last mode you were in (which is the way it should be)...

[Veteran68]

My hunch is that maybe you (Randy222) upgraded the firmware right away therefore you had no problem.  Whereas Veteran68 and I maybe saved a few waveforms testing out the device.

Not the case for me. I'd saved nothing, ever. In fact since I got it I've done little beyond turn it on, and test the UART function as discussed before. I have a 702S already so was familiar already with the function, and hadn't had a use for this one yet (I collect far more than I use, I have somewhere around 35-40 handheld DMMs/scopes).

It's telling that our out-of-box experience is one where the volume is labeled "RAM", contains just a firmware folder, and is only 608K in capacity. Whereas post-format it's labeled FLASH, has multiple folders, and is 16MB in size. So either Randy's left the factory later and was formatted properly (possible, as mine was a preorder and may have been an early unit), or he'd already formatted it, perhaps not realizing or remembering. Curious to hear from others as to how theirs is formatted out of the box.

One thing to note with the Ver 1.27 firmware upgrade, it seems to fix the problem in which if you were in MultiMeter Mode and you turn off the unit it will likely default to Oscilloscope Mode.  Now whatever Mode you were in when you turned off the machine (or assume auto-off) that when you restart it will go to the last mode you were in (which is the way it should be)...

Yes this was the main update with the last 702S firmware update. I noted earlier that I was surprised that the default had regressed in the 703S. I expect that the 703S and its delivered firmware were already in development/being finalized when the 702S update occurred, and they didn't merge their code before the 703S release.

[Randy222]

v127 for 703 is very bad

I went into scope with prob set 10x ch1, changed freq to 1kHz sine 1v, back to scope and hit AUTO, it combed a few time scales to 100ms, then the unit seemed to freeze/crash and screen shut off to black, but 703 is still powered on! I press power button and flat line ch1 appears, then some just seconds later screen goes black again (Auto Off setting is set to OFF, I don't see any sleep or screen timer). Screen goes dark every 30sec.
(sine wave with DC coupling seems to be the culprit for AUTO with "crash", switch it to AC coupling and AUTO seems to be "ok")

1v on 10x probe config should not be hard for 702/703 to display, but weird stuff.
Also, using square wave, no longer can set freq or v or duty cycle. It's now just 1kHz 50%.

Measuring 1v sine, is off. 1v set, vpp says 860.0mv, or, the actual setting of 1v for the signal is off, not sure which.
Depending on volt scale chosen, the vpp measure changes, anywhere from 850mv all the way to 1.5v !

Set freq out sine 5kHz 1v (arbitrary setting), hit AUTO, then go into menu and cycle the Trigger Mode from Auto to Manual to Single and back to Auto, on the last back to Auto, scope sticks in STOP mode.
Scope will not allow you to turn off both channels at the same time.

I try the Calibrate menu item (open ports), it displays "Under Calibration" and then 5sec later a "Check Failure" notice (assume to mean claibrate failed). Where is the fail notice? It did not write any user accessible file into any folder when in USB mode.

Something not right with v127.

Timescale issue at 100ns seems to be fixed, I can tune all the way down to 10ns with the square wave.
Note: the F1 + power on is the same things as turning on USB from scope menu.

[kwass]

One thing to note with the Ver 1.27 firmware upgrade, it seems to fix the problem in which if you were in MultiMeter Mode and you turn off the unit it will likely default to Oscilloscope Mode.  Now whatever Mode you were in when you turned off the machine (or assume auto-off) that when you restart it will go to the last mode you were in (which is the way it should be)...

It's not quite fixed.  On the 702 you can switch from multimeter to scope and back and you'll be on the function/range that you had before, on the 703 this will reset to auto-ranging VDC every time.  That needs to be fixed.

[Veteran68]

Note2:  I wish Zotek people would have a Change Log or History (of what changes they made) so we do not have to guess...

Take a look here: https://www-dt830-com.translate.goog/thread-8262-1-1.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp&_x_tr_sch=http

Change Log for the prior version but not this latest one.  There's a bunch of info about all the Zoyi products on this forum if you more up a level or two.

Copied here for posterity. Last week's 1.19 release is also newer than what mine came with. Not at home right now but last night when trying this update I want to say my shipped version was 1.09.

2024.01.15 ZOYI-703S-FW-V127
    has fixed several problems discovered by friends in the group,
    but the details have not been announced yet

2024.01.08 ZOYI-703S-FW- V119
    1. Fix the problem that the 100ns time base trigger position is incorrect.
    2. Fix the problem that the time base will occasionally be confused when scaling the waveform after stopping in the single trigger mode.
    3. Fix the abnormal measurement value in the rolling mode.
    4. Fix the rolling mode.
    5. Fixed the problem that the grid is occasionally eaten in scrolling mode
    6. Fixed the problem that in multimeter mode, occasional garbled characters will appear when powering on
    7. Fixed the problem after switching between different applications, the problem of language out of sync
    8. Add the function of maintaining the current language after restoring the default settings
    9. Fix the problem that the U disk cannot be opened occasionally
    10. Unify the frequency unit
    11. Fix the startup memory mode, the multimeter interface is turned off and turned on to start the multimeter. Turn off and on the oscilloscope in oscilloscope mode
    12. Remove the "prompt that the trigger may be unstable"
    13. Optimize the AUTO logic and fix some problems in AUTO mode, including possible crashes, stucks, timeouts, etc.

[Randy222]

Note2:  I wish Zotek people would have a Change Log or History (of what changes they made) so we do not have to guess...

Take a look here: https://www-dt830-com.translate.goog/thread-8262-1-1.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp&_x_tr_sch=http

Change Log for the prior version but not this latest one.  There's a bunch of info about all the Zoyi products on this forum if you more up a level or two.

Copied here for posterity. Last week's 1.19 release is also newer than what mine came with. Not at home right now but last night when trying this update I want to say my shipped version was 1.09.

2024.01.15 ZOYI-703S-FW-V127
    has fixed several problems discovered by friends in the group,
    but the details have not been announced yet

2024.01.08 ZOYI-703S-FW- V119
    1. Fix the problem that the 100ns time base trigger position is incorrect.
    2. Fix the problem that the time base will occasionally be confused when scaling the waveform after stopping in the single trigger mode.
    3. Fix the abnormal measurement value in the rolling mode.
    4. Fix the rolling mode.
    5. Fixed the problem that the grid is occasionally eaten in scrolling mode
    6. Fixed the problem that in multimeter mode, occasional garbled characters will appear when powering on
    7. Fixed the problem after switching between different applications, the problem of language out of sync
    8. Add the function of maintaining the current language after restoring the default settings
    9. Fix the problem that the U disk cannot be opened occasionally
    10. Unify the frequency unit
    11. Fix the startup memory mode, the multimeter interface is turned off and turned on to start the multimeter. Turn off and on the oscilloscope in oscilloscope mode
    12. Remove the "prompt that the trigger may be unstable"
    13. Optimize the AUTO logic and fix some problems in AUTO mode, including possible crashes, stucks, timeouts, etc.

#13 seems to still be an issue in v127

[Shonky]

Anyone know the cpu/architecture these 702/703's are built on?

702 is an Artery AT32F403AVGT7. 703 probably the same?

[Randy222]

Anyone know the cpu/architecture these 702/703's are built on?

702 is an Artery AT32F403AVGT7. 703 probably the same?

An ARM Cortex M4F 32bit.

Thanks.

[Randy222]

My 703 now turns screen off every 30sec, but I see no menu item to change that.
This seemed to happen after the unit appeared to have crashed while attempting Auto on a 1v sine 5kHz with probe settings 10x.

Anyone else have screen-off issue?

[guyincog]

My 703 now turns screen off every 30sec, but I see no menu item to change that.
This seemed to happen after the unit appeared to have crashed while attempting Auto on a 1v sine 5kHz with probe settings 10x.

Anyone else have screen-off issue?

I think that is the "BL" setting in the menu. As I recall,  30/60/120s (or never)

[Randy222]

My 703 now turns screen off every 30sec, but I see no menu item to change that.
This seemed to happen after the unit appeared to have crashed while attempting Auto on a 1v sine 5kHz with probe settings 10x.

Anyone else have screen-off issue?

I think that is the "BL" setting in the menu. As I recall,  30/60/120s (or never)

I only have Bk Light, for me is only a % for brightness. Other than that I have an auto-off menu item (set to off), auto-off powers off the device.
I seem to have a 30-sec screensaver that just turns the screen off black. I don't see where to change that. Has to be a bug in v127.

[Altair8800]

My 703 now turns screen off every 30sec, but I see no menu item to change that.
This seemed to happen after the unit appeared to have crashed while attempting Auto on a 1v sine 5kHz with probe settings 10x.

Anyone else have screen-off issue?

I turned my ZT-203S on Volt Meter mode.  Did nothing (not testing just let it set) and it turned of in about 2 minutes.  Since quyincog suggest the BL (back light time) setting I checked mine and it said 120s. 

It seems like the BackLight turns off whole screen (to black) but if you quickly press Power button (or any key) it turns back on.

[Altair8800]

@ Randy222

Try:
Got to Oscilloscope mode
Press Menu
Press > (right arrow next Menu) 4 times (which should take you to the 5th menu tab).
there "should be a BL time above the F4 key

[Altair8800]

Adendum:


I think this is how it works "BL time" is sort of like auto turning off Screen in Windows in Power Saving Mode. And if you tap any key it quickly turns back on [the screen].

"Auto Off" is sort of like auto turning off (or more like Sleep mode because the unit boots pretty darn quick) in Windows Power Saving Mode...  After it turns the meter off you have to long press the Power button (2 seconds) to reboot/turn on.

[Randy222]

Found the BL menu item.  on myself.

I will try to make the v127 crash again and see if it comes back with BL set to 30s.

[tonyalbus]

Hi, i put some tests together, but somehow i have the feeling they changes something with the sampleing.
Still my sample from Zotek needs to arrive, not sure what version that will be, this was a pre release from teh store mentioned many times before.
i tested off video with the firmware 1.0.9 and then i could go above 46 MHz .. not very stable but i could.
now i did same test with 1.2.7 and, is was a no go...it was going allover the place... it was very stable upto 46 MHz though.. and that has improved a lot.
it seems they made a choice of going above 50 and shaking or stable upto 46... can agree with them.
anyone has firmware file from before 1.2.7 ?   please share. i like to do more tests.

[ahakman]

I don't have the installable firmware file, but my unit still has 1.0.9 on it as I haven't updated yet.
I'll be back home in a couple of days and able to run more tests with more test equipment when I'm back.