Review/Teardown of a ZOTEK ZOYI ZT-702S Budget Handheld Oscilloscope/Digital Multimeter

Zotek links:
goods_id=601099517434133&_x_sessn_id=irlmsa664m&refer_page_name=goods&refer_page_id=10032_1685156881544_zn37695kkx&refer_page_sn=10032

00:00 Overview, powering on, user interface
03:36 Oscilloscope test, AM/FM signals
07:43 Oscilloscope bandwidth test
09:06 Probe calibration, single shot and more
14:50 Multimeter, DC/AC voltage measurements
19:31 Resistance/continuity/capacitance/current
26:59 Millivolt range, temperature measurement
30:05 Teardown, current consumption, conclusions

[KerryWongBlog]

As a few of you had pointed out, correction around 27:30 it should be microvolts not nanovolts. If I ever get my hands on a nanovolt meter you will see it on this channel for sure :-)

[car-cufl]

Very thorough and informative review, high quality work by the reviewer. No annoying music intro, loud or otherwise. Just straight to the point, but he still filled 40 minutes with important details and learning. This is how all reviews should be done.

[JollyTVance]

This was a great review! I like how you gave an indication of how each spec related to other devices. It was great to know if something performs well or is typical behaviour, rather than just being told a number

[TRONMAGNUM]

Looks like a really nice budget test device.

[boots]

Thanks for the review. This sounds like it will meet my newbie needs for a few years with uP projects. Also in Dave's review they were quick to get some firmware updates out, so its possible there will be more.

[Homer]

Great review!
Got mine yesterday. It was battery dead upon arrival. Bad sign. It wouldn't charge after trying different cables & chargers. Finally pulled the battery & it wouldn't charge in the C4 charger. Finally put another battery (EBL) in it & seems like all is well, for now. Going to have to monitor it for power off drain down. If all is well over the next weeks, then it was a minor issue. If

[aurthorthing]

Be interesting to see how it handles regular diodes...schottkys and zeners such.

[mrkby]

Very informative, thank you for this Kerry!

[directedtch]

Thank you for this review! Adding one of these to my tool kit :)

[topeye]

Update:
It remembers now in which mode it was (oscilloscope or multimeter) when switching on again
They show now a clear picture where the lines should plugged in in addition to the warning triangle, everytime when choose A or mA range.
To test internal fuses without opening the case, just go to resistance mode and test with the red line the A and mA terminal. When there are a few ohms at mA and about 0, 24 ohms at A the fuses are ok.
Ambient temperature can be measured by short the two probes in temp.mode.

[jesuisla-dctr]

@ 25:44 that issue should be fixed asap, in a firmware update this can throw someone off were both settings uA and mA read the same, i was thinking on getting one but this has changed my mind.
thanks mate for the review

[trevorvanbremen]

Kerry, IMO, this is your best review EVER! Give yaself a pat on the back!
(I can be quick to criticize when things aren't quite right, but I can be equally quick to give praise!)
IMO, this DMM+Scope combo looks to be a great choice for those starting out in the electronics field. Sure, it's only a 1-channel scope, and doesn't have cursors, FFT etc like any half decent 'modern' scope, but it's VERY well priced!

[tastenheber]

Interestingly they use a protected 18650 cell, although there's a charging IC. I wonder if that one maybe has no low discharge protection? I've tested the device with a unprotected 3500 mA cell and it automatically stopped charging at 4.2V (as expected). The battery holder also seems to be made for a shorter, unprotected cell, since its already a very tight fit and the plastic is bent slightly on the ends of the holder. I wonder why the still used the cell with additional protection circuitry.

[barrybogart]

I ordered one as soon as I watched Dave's review. He was surprising non-critical, so I am glad you agree with his judgement, I do have the Owon handheld scope too. As Dave would probably saw, you can't have too many scopes! (I have his favorite vintage HP CRO as well.)

[jstro-hobbytech]

Zoytek always have screens that don't need additional illumination if you look dead on.

[zotekmultimeters]

Well done! Thank you for the wonderful review!👍

[watchmakerful]

This device warns you when you switch into A or mA mode, BUT NOT BACK! Why? A couple of hours ago I repaired a simple UNI-T M830BUZ meter, tested its 10 A range, then switched to 750 V AC and... set off the circuit breaker 😀by inserting an unfused 10 A shunt directly into 220 V. The meter survived, but all my 220 V powered digital clocks now require setting time...

[marcoalexandrebianchi]

Good morning. My name is Marco and I'm Brazilian
Your video is very good. I have a question:
This ZT702S device, with the oscilloscope function, can I connect it to a computer for measurements, making the computer screen the oscilloscope screen? Another question: can I measure 1mV scale, as I use a lot of load cells? Thanks

[GertEnsing]

Hi. I am not an electrian. Can I use the probe for frequency to connect to the 230VAC 50HZ wall outlet ? By taking the black probe, put it on the phase and the short cabe thats connected for earth to the earth pin of the wall outlet?

[ajituning]

Is this any good for logging car trigger patterns vr sensors etc?