Author Topic: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)  (Read 378253 times)

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Offline tol

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #975 on: January 18, 2025, 02:44:25 pm »

The signal period is 50 ns, why do you divide by 25?
[/quote]
I think it's because I'm inattentive :) I measured the value correctly, but divided by a wrong number. Maybe that 25 ns/cell mislead me... I'm happy that I'm not a space ship  construction engineer, otherwise it would certainly fly to a wrong planet :)

 

Offline OLderDan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #976 on: January 18, 2025, 09:12:02 pm »
Is there a firmware version that the trigger and cursor buttons automagically change colour to show which channel is being used like the vol/time and move buttons ? At the moment my workaround is to choose the channel on one of the first two buttons manually so it shows the correct colour. I know it doesn't affect the outcome, but it makes the UI feel more consistent!

Does the trigger actually do anything in normal mode compared to auto? It seems only in some random cases to function like on my hantec dso2d15 where single and auto function as expected. I know I read earlier a mention that the implementation of the trigger left a lot to be desired, but I seem to have great trouble seeing a difference in the waveform displayed other than T'D being shown when I switch between normal and auto.

Again, I love this device. I can sit on the verandah with my breadboard and z703 and my classpad and nerd out doing RC time constant math in the sunshine!

EDIT: i used the email link at the firmware update page to link to this thread and asked the question relating to the button colours. Will post back if i get a meaningful reply.
« Last Edit: January 19, 2025, 03:24:05 am by OLderDan »
 

Offline OLderDan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #977 on: January 20, 2025, 07:05:37 am »
I opened my z703s to be greeted with a nasty surprise of deep corrosion on the metal shield, I can't see underneath if there is more damage but as it was brand new from Amazon I sent it back and a new one is on the way.
 

Offline mebel

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #978 on: January 23, 2025, 08:39:05 am »
A little petition to member ajar171
Is there a chance to add extra functionality to diode testing, like a short beep sound when the DMM detected diode testing?
« Last Edit: January 23, 2025, 02:34:45 pm by mebel »
 

Offline ajar171

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #979 on: January 24, 2025, 07:58:55 am »
A little petition to member ajar171
Is there a chance to add extra functionality to diode testing, like a short beep sound when the DMM detected diode testing?

If You mean, to beep, when the voltage is below a threshold, then it is already done. It beeps 3 times / second as long as the voltage is below a set threshold (it is a hack, because the MCU has no control over the DMMs beeper, but it works :))
 
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Offline Edmiri

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #980 on: January 24, 2025, 08:55:11 am »
Any chance of your firmware working with sigrok software. I see some multimeters and oschiloscope in their list.
 

Offline ajar171

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #981 on: January 24, 2025, 09:35:37 am »
Any chance of your firmware working with sigrok software. I see some multimeters and oschiloscope in their list.

I have to check that, but whis has really low priority.
In DMM mode, the meter is already sending the measured value over USB-CDC (it can even be controlled), but someone would have to write an input plugin for sigrok.
 

Offline Gibsonmb

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #982 on: January 24, 2025, 05:11:08 pm »
Did you get any other responses on this message as I have a similar problem, the up down arrows will not move me to the amplitude field and I cannot therefore set the amplitude level. it is the same for the 'more apps' generator and the "Output Setting". I can only get to the "Output field" but not the "Freq", "Vpp" or "Duty" fields in the Output Generator. In the "More apps" generator I can adjust Frequency, signal type and duty cycle but not amplitude as the buttons F1-F4 never offer amplitude to be adjusted. I am on V1.4.2 of firmware
 

Offline Gibsonmb

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, Generator
« Reply #983 on: January 24, 2025, 05:21:18 pm »
Problem. In Output (F4 key of menu)  the up down arrows will not move me to the Freq, Vpp or duty fields and I cannot therefore set the amplitude level. The menu button when pressed, will allow me to set the signal type, sine square etc. it is the same for the 'more apps' generator and the "Output Setting". I can only get to the "Output field" but not the "Freq", "Vpp" or "Duty" fields in the Output Generator. The exit button (F4) will not allow me to exit either. In the "More apps" generator I can adjust Frequency, signal type and duty cycle but not amplitude as the buttons F1-F4 never offer amplitude to be adjusted. I am on V1.4.2 of firmware. How do you adjust the amplitude (Vpp) on the More apps Generator? Vpp seems fixed at 2.5V. Pretty useless.

Maybe I'm just doing it wrong. Really like some help.
 

Offline OLderDan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #984 on: January 24, 2025, 06:39:55 pm »
Are you aware the more apps signal generator does not function when you are using the oscilloscope?

The output (button f4) fields can be accessed when you select (hit menu to change the box outline to yellow) another waveform than the standard 1khz square wave (adj sq wave, sine wave, tri wave,) then hit menu again and while the box outline is red move down and hit menu to change the selection while the box outline is yellow, then hit menu again to make the outline red and exit with the f4 button
 

Offline OLderDan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #985 on: January 26, 2025, 01:41:02 am »
While I love my z703s, there a couple of issues I have with it:

1/ won't hold normal trigger below 500ns on slow waveforms (below 85khz)
2/ rms measurement seems to use Vpp x .7071 when it should Vpp/2 x .7071**further tests suggest user error.
3/ cursors don't remember last position when switching modes.
4/ cursors don't display if persist is above min.
5/ on screen button colours don't auto match selected channel for trig and cursor.
6/ artifacts on screen when using persist and turning off a channel.

If anything happens with custom firmware I would love to see the on screen buttons drop down after a timeout like windows taskbar, then measurements could be displayed outside the grid (i would be happy to choose only 3 measurements at a time which would fit nicely in a horizontal row) or the actual height of the waveform grid could be extended to fill the space. (like the owon 272s) All in all I think the z703s is a keeper, even with my gripes!
« Last Edit: January 26, 2025, 06:34:53 am by OLderDan »
 

Offline ajar171

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #986 on: January 26, 2025, 10:15:42 am »
If anything happens with custom firmware I would love to see the on screen buttons drop down after a timeout like windows taskbar, then measurements could be displayed outside the grid (i would be happy to choose only 3 measurements at a time which would fit nicely in a horizontal row) or the actual height of the waveform grid could be extended to fill the space. (like the owon 272s) All in all I think the z703s is a keeper, even with my gripes!

That is a great idea! Thanks!
 
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Offline OLderDan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #987 on: January 26, 2025, 11:05:23 am »
Mate, my biggest qualification is enthusiasm, but if there is anything I can do to help with the custom firmware process feel free to message me. I understand the risks of flashing etc, but knowing that eventually the z703s will be forgotten by our Chinese overlords, if this wonderful device is to have a long life, a custom firmware will be the way.
 

Offline ajar171

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #988 on: January 26, 2025, 01:11:55 pm »
Just a quick update
 
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Offline kwass

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #989 on: January 26, 2025, 02:40:49 pm »
I love the time graph of voltage!  Can you show some sort of time scale and will this work on current as well?
-katie
 
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Offline ajar171

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #990 on: January 26, 2025, 03:04:24 pm »
I love the time graph of voltage!  Can you show some sort of time scale and will this work on current as well?

Sure  ;) It works in all modes
 
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Offline IC_Toaster

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #991 on: January 26, 2025, 06:28:18 pm »
Just a quick update

I find this graph quite more useful than the level marking than the stock firmware has.
You are doing a good job.
 

Offline Edmiri

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #992 on: January 26, 2025, 06:31:07 pm »
Great work. Whats the minimum s/div?
 

Offline ajar171

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #993 on: January 26, 2025, 08:03:43 pm »
Great work. Whats the minimum s/div?

The technical minimum is 20s/div, because the meter takes 3 measurements/second and one division is 60 pixels wide. Currently the max is 1hour/div (so 1 minute/pixel), but that is only a software limitation.

For long term logging, the internal flash is used, also with 1 minute/entry limit, average,min,max recording in csv format, there the meter can save around 620.000 entries until the disk is full (that would be over a year of logging)

The trend plot can be switched off, if not needed, so the screen is not that cluttered.
 
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Offline OLderDan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #994 on: January 28, 2025, 07:44:21 pm »
I just got my owon hds272s, and I must say after a week with the z703s I am underwhelmed by the owon. I really miss having both cursors at the same time (for manually calculating rise time and rms) and wow does the owon run warm and compared to the z703s, you can almost watch the batteries discharge in front of your face (hyperbole warning!)

The z703s multimeter is a joy to use and very nicely placed information on the screen makes infromation easy to read where the owon multimeter feels like they had a couple of spare bytes left over so they left some rudimentary program on the flash. It is a shame really, clearly the owon oscilloscope is a superior beast, and I much prefer how the buttons disappear wwith a configurable timeout to allow for a larger grid to display the waveform.

It seems I am a zoyi fanboi now at 61, it all started with my much loved little green zt-102L purchased over a year ago, which is such a handy size and with so much functionality that it is always at hand near the work bench. Now it has a friend.
« Last Edit: January 28, 2025, 07:52:51 pm by OLderDan »
 

Offline LucSVK

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #995 on: January 28, 2025, 09:31:48 pm »
Great work. Whats the minimum s/div?

The technical minimum is 20s/div, because the meter takes 3 measurements/second and one division is 60 pixels wide. Currently the max is 1hour/div (so 1 minute/pixel), but that is only a software limitation.

For long term logging, the internal flash is used, also with 1 minute/entry limit, average,min,max recording in csv format, there the meter can save around 620.000 entries until the disk is full (that would be over a year of logging)

The trend plot can be switched off, if not needed, so the screen is not that cluttered.

Will an external storage  be supported as well? For example USB flash drive?
Will it be possible to do more complex logging scenarios? For example not only voltage measurement, but for example voltage and then DMM would be automatically switched to current measurement and measure current?

Thanks L.
« Last Edit: January 28, 2025, 09:46:04 pm by LucSVK »
 

Offline Atlan

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #996 on: January 29, 2025, 07:51:33 am »
Could I ask for diagrams for a possible repair of the device. Thank you
FNIRSI 1013D Always provide a picture or video with the problem where the parameters of the oscilloscope are visible, and a picture of the diagnostic screen with the values.
Firmware is here (or not) https://github.com/Atlan4/Fnirsi1013D/tree/main/latest%20firmware%20version
 

Offline chebo

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #997 on: January 29, 2025, 08:38:27 am »
for example voltage and then DMM would be automatically switched to current measurement and measure current?
How is this possible? This requires physical re-commutation of the device inputs and changing the device connection to the measured circuit!
Experience is what we got instead of what we wanted...
 

Offline LucSVK

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Re: New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)
« Reply #998 on: January 29, 2025, 09:49:39 am »
for example voltage and then DMM would be automatically switched to current measurement and measure current?
How is this possible? This requires physical re-commutation of the device inputs and changing the device connection to the measured circuit!

Well, I am not sure if it's possible.
My idea was like this ..

The device has 10A, mA ,  COM and  V/R/diode/Cap sockets

Physically it's possible to connect for example 10A  and COM  in series and add another test lead and connect it in parallel to measure the voltage
But I have no idea if it's possible to change  DMM mode between A, V, R etc. from inside the firmware.
Not sure if something like this would damage the device.
I thought, that incorrect connection in AMP mode in parallel (for example between + and GND or ~  and GND ) would damage the device/burn the fuse, but not in series ( even though the device is switched to V measurement )

Also I have no idea whether for example 10A and COM are still live (connected together) even though the test mode is changed to Volts. Maybe they aren't .. I've never tested anything like this.

Maybe it's all impossible.

Quite recently I had some issue with my car. I needed to log voltage on the battery but also power drain for a few days. And I asked myself if it would be possible to measure this with just one device in the same time. But maybe it's impossible because of construction of the device or so.
 
« Last Edit: January 29, 2025, 09:52:54 am by LucSVK »
 

Offline indman

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