EEVblog 1597 - Zoyi ZT-703S $80 2CH 50MHz Oscilloscope/Multimeter Review

Looking at the new $80 Zoyi/Zotech ZT703S Dual channel 50MHz 25,000 count 0.05% handheld oscilloscope/multimeter compared to the single channel 10MHz 10,000 count ZT702S
s.click.aliexpress.com/e/_DeSzRKZ
ZT-702S review: kzbin.info/www/bejne/l4a4XoN9itOXZqc
Forum: www.eevblog.com/forum/blog/eevblog-1597-zoyi-zt-703s-$80-2ch-50mhz-oscilloscopemultimeter-review/
00:00 - The new $80 ZT-703S vs the $60 ZT-702S
03:40 - Power on and screen differences
06:25 - Multimeter
07:49 - The Bargraph is still a complete JOKE
08:50 - Power-off memory test
09:41 - Dumb Arse Dave BRICKS the ZT-702S !
10:23 - The SAME current measurement FAIL
12:19 - 0.05% ?
13:17 - Same BNC connector issue
13:44 - The signal generator is still a joke
15:53 - Trigger level issue FIXED
16:39 - Range overload bug FIXED
19:10 - Teardown
25:07 - Oops...
25:21 - Battery life and current consumption test
26:54 - Conclusion
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#ElectronicsCreators #Review #Oscilloscope

[@kbr1887]

If you buy the kit that includes two probes, they ship it with the second probe taped to the box containing the scope and wrapped in a mountain of bubble wrap. Unwrap it carefully and don't just cut the wrap off like I did, or you'll end up with a single probe kit plus 6 pieces of scope probe cable.

[@mrcomment5544]

They need a college football player majoring in 'packaging engineering' to solve this problem.

[@_BangDroid_]

Use a machete to open the package?

[@kbr1887]

@@_BangDroid_ that's not a noife

[@dcallan812]

@@_BangDroid_ thats not a knife! 🤣

[@sjp8969]

lol

[@AGuyInFargo]

A guy I met on a flight, saw some of the videos I watch and recommended your channel. I wish I could find that guy. He knew me better than half my close friends.

[@alejandromendez328]

If he recommended the channel, you probably will find him if you put the same comment in all the videos until he sees it. :) People will probably vote you up haha. Maybe Dave notices it and mentions you in a video or the amp hour haha

[@Dont_Gnaw_on_the_Kitty]

Is your name Ron?

[@AGuyInFargo]

@@Dont_Gnaw_on_the_Kitty No. Josh and a big guy that needed more arm room.

[@Gossamer2]

Well, I've seen Dave get excited over an oscilloscope AND seen an oscilloscope get excited by Dave all in one video now! Haha!

[@JeepinBoon]

I can see a good use in the automotive field. Having a battery operated scope with live feed and trigger save can be a blessing for catching intermittent problems. Intermittent problems are the worst!

[@dhombios]

I totally agree with you. A device like that can be quite useful for any kind of test or repair which can't be done in the lab. Being able to see waveforms is great for debugging complex problems, but sometimes using a normal oscilloscope is just not possible

[@xani666]

Came here to say that, if there was only a bit more rugged version it would be perfect

[@pa4tim]

I do not know they survive that. I have seen a lot fried Fluke scopemeters used automotive. And those are pretty well protected. On the other hand, you can fry 50 of these against one Fluke. If you buy them 10 at one time you could probably get a discount.

[@dhombios]

@@xani666 Being able to save waveforms to an SD card would also be great (I haven't finished the video yet, so maybe it actually can)

[@xani666]

@@pa4tim I do not think this one would fry more often but I do think it would do far worse on dropping and other mechanical abuse. Maybe the mechanics try to probe the high voltage part of ignition lmao

[@rogersellers493]

Dave, you may have been a little harsh in your evaluation of the Zoyi ZT-703S with regard to its stated 50MHz bandwidth. The scope comes shipped with the bandwidth setting (shown under the menu setting “Run Mode”) set to “Normal Mode”, which limits the bandwidth to a maximum of 30MHz. This is done to lower power consumption. To measure signals up to the 50MHz maximum, you need to change this setting to “High-Speed Mode”, although it states the power consumption will increase. I would like to see you re-evaluate this scope with the setting on High-Speed Mode and see if it does reach its full 50MHz bandwidth and maybe check the power consumption in this High-Speed Mode compared to Normal Mode and let us know how it compares. Thanks!

[@fusseldieb]

Imo it should show "30kHz mode" for a brief second then, so people know there's another mode. I wouldn't know either.

[@Lively_1185]

This, exactly this. Although to be fair, if I used this, I wouldn't know better either. Hidden modes like this are why we read the manual. Be honest though, the first thing we do is throw it out for simple use gadgets like this one, oh well I guess the 50MHz mode is hidden.

[@snakezdewiggle6084]

I remove the user manual, read it thru, then remove the device, check it to make sure they agree. Nothing broken, missing, etc. I can't imagine doing any other way. All tools require inspection and familiarization, for safety, and best-bang-for-bucks. If you don't your a fool.

[@lashamartashvili]

@@snakezdewiggle6084 Sometimes I download the manual before I actually buy or before it arrives and read it through to know all about the device's features and test them immediately when my purchase is my hands.

[@haithamdarwish6245]

i wana buy this oscilloscope to test power phases on Graphic cards. do u think it will be enough to tell me if they are ON or OFF? i just wana see a signal on or off.. dont care much abt readings

[@flubba86]

Oh man, I don't need this, but I want one so bad.

[@alphabeets]

The bargraph is useful when you are watching to see if the reading is moving up or down. Visually seeing a meter needle move in a direction is easier than remembering and comparing numbers in your head. The needle also shows the rate of change. Quite useful.

[@davadoff]

You must be one of those people that prefers analog clocks. I have to convert the clock hands into numbers to know the time, so I prefer digital as no conversion is necessary. For this sort of reason I agree with Dave. I would *much* prefer big clear numbers instead. Or it should at least be an actual bar-graph instead of stylised like a car speed dial.

[@svrs]

love it man.. you cover the entry level stuff with just as much detail and insight as you do the high end gear. thanks

[@KeepOnTesting]

He never used to, KeepOnTesting made him think twice about calling CHEAP-O's crap. Muhahaha 😅

[@TheScarvig]

one of the best things that i learned about these handheld scopes is that they are isolated from ground.... that makes them really useful for analysing signals in machinery where you dont neccesary know if the pin is safe to be grounded or where you need a relative measurement. ive blown a couple breakers by accidentially hooking up the scope ground to a port that was not happy about getting grounded through the earth of the scope.

[@saulbalderas387]

I really like how you present these products. Great work 👏

[@Larry-AK0Z]

I won't be upgrading. The 702 suits me fine for measuring all that I do. 10MHz is good for checking power supplies, analog, and switching. Audio circuits. The analog multimeter is great for tuning rf and if circuits. The meter is accurate for most uses. Thanks for the review of the 703.

[@oldgeezerproductions]

I use my 703 to capture ignition secondary waveforms to see how the coil, wires, plugs and combustion chambers are operating while running. For this application, I can't imagine anything that would be more handy. I use it with motorcycle engines and it works superbly capturing even the little inductive bounces at the end of the burn line. I've been using it with a single inexpensive Hantek HV probe, but I have a second probe arriving tomorrow so I can check and compare two cylinders simultaneously. Earlier, to see if I really needed to go to all that work, I used the 703 and the Hantek probe to check the plugs of a GMC 3/4 ton truck's V8 engine. Although the engine ran smoothly, the scope said 'GET NEW PLUGS NOW!' and yes, they were indeed worn beyond anything I'd ever seen when I pulled them. The only thing that works better for this kind of ignition testing is my large lab scope that has to be plugged in to AC and isn't really practical to use on the shop floor.

[@Crookmk4]

Would be interesting to see how this compares to some of the cheapest desktop oscilloscopes. At least comparing the problems and jankyness

[@TheDefpom]

I got one to review too, will be publishing it today, had to split into two videos, with second part being published later… I ended up with 2 hours of footage !

[@ChatGPT1111]

Would be a good cure for insomnia.

[@user-se5jc3gw1y]

Dave, I bought a 702 a few months ago and the unit delivered has a defective probe. The switch would not select x1 ... x10. Amazon sent me a new scope and didn't require me to return the original one. So I bought a new probe and now have 2 scopes. ..... Lucky Me!

[@bxl181]

Just taken delivery of 703S using your aliexpress link after watching your video. £76 with two sets of probes delivered to the UK in 7 days. Mine has firmware version 1.2.7 which seems to be the very latest. While testing 703S, I found a bug whereby if you make any changes the function generator settings in the 'Output Setting' menu, the time base cannot subsequently be set to any value less than 100 uS. To fix the problem, go to the 3rd menu and choose 'Default ON' to restore settings back to factory defaults.

[@wtmayhew]

I would recommend paying a little more and going with the Owon HDS242S. That’s a two channel 40 MHz scope, 20,000 count meter and 25 MHz function generator. I easily found it listed for $140 US, but I assume you could find it for less. It is worth paying a little more because the Owon instrument meets or beats the promised specifications. The Owon uses two 18650s which are easily field swappable under a removable cover. Accessories are similar: carry case, meter probes, one scope probe, alligator clip co-ax cables, charger/cable, manual. I carry the 100 MHz version of the Owon in my tool bag.

[@button-puncher]

It would be interesting to see an OWON review. I've got a couple of their DMMs and they are solid units.

[@wtmayhew]

@@button-puncher There are several reviews of the Owon HDS200 series on KZbin. I own both the 100 MHz and 200 MHz versions. I believe the best value/price proposition is the 100 MHz model unless you need the extra bandwidth on a regular basis. There seems to be a little less noise in the vertical amplifiers of the 100 MHz model even though it uses a multiplexed ADC chip versus dual ADC chips of the 200 MHz version. I’ve got an Owon clamp multimeter in my tool bag too and it is surprisingly good, not as nice as a Fluke, but like 1/6th the cost.

[@tech29X]

@@wtmayhew I love the DATA LOGGING function through blue tooth on OWON. I OWN couple OWONS and very happy with their quality.

[@ferrumignis]

Yep, I have the 100MHz model in my toolbag as well. It's been handy when working on cars and seems pretty well sorted, no major bugs. As usual with these things they can be a bit frustrating to use compared to a bench scope, but that's always going to be true when you have buttons instead of knobs and a small screen.

[@Chris-Brown-]

I have a 70Mhz OWON for a portal scope. I dont like that continuity its very slow to respond and the battery drains itself when powered off

[@reedreamer9518]

Two years ago I bought the OWON HDS272S 70 MHz Oscilloscope 3 in 1 (2 channels plus built-in function generator) with 20,000 count multi-meter. Its totally rectangular so its a bit "boxy", but its got two 18650's and every function works as it should. Its a totally usable oscilloscope (and multimeter) when I need isolation or something to carry portable, like finding a bad fuel injector on my truck. The Zoyi does have the edge on form and style, though. I like the rounded face and the slightly curvy body - it just looks better.

[@MrEmiriv]

I have the 100Mhz version and I'm very pleased. In that thing the multimeter side is completely isolated, it has a switch mode power supply and 7 optocouplers, very expensive, give me more buttons instead to make it more useable.

[@wtmayhew]

Ooh, under the bottom can, looks like a little left over flux on the solder mask with a nice partial fingerprint In it. Quality work.

[@button-puncher]

Rigol-like scope interface on the new one. At least the little icons and whatnot. I'd like a graphing function (chart recorder) more than the bargraph.

[@raytry69]

They removed the writings of the chips probably because they don't want to see dozens of copies of their product.

[@simon3121]

Or because the chip manufacturer wants to protect its brand. Maybe these failed QC. Like CPU binning.

[@raytry69]

@@simon3121 All of them?

[@sharonrose9552]

​@@raytry69 Maybe for the FPGA. The other parts could be similar, but say a reel has a 3% failure rate instead of the 1% failure rate, then they can't sell the reel as namebrand but they can go through and test all the components on the reel and pull off the bad ones. So the chip portion of the component cost drops to zero because they were headed to the dumpster anyway because they can't sell them. However with the essentially underclocked fpga chip, they can sell a bunch of chips in a product that doesn't quite spec out right anymore to consumers for cheap and still make money off them. They also could be avoiding people copying the design.

[@scottp131]

Dave, I've been watching your channel for a number of years, and I just have to say that I absolutely love your content. I am far removed from the field you're in, and I originally watched your videos sheerly out of amazement in regard to the knowledge you have with electronics (which of course makes perfect sense given your background lols). Pretty much every word that came out your mouth went in one ear and out the other, but your charisma makes it worth following videos through just to see what kind of crazy thing you end up tearing into next lol. I have learned so many incredible things through your channel, like so many things, and I can't thank you enough! You're inspirational in your willingness to share your knowledge! I am not and likely will never be an electrical engineer, but damn do you ever make me wish I even knew the basics of the industry when I was in school, because I'd for sure have jumped into it headfirst haha! You rock good sir!

[@vincentv646]

I just bought a FNIRSI 2C23T from aliexpress for a project. Good to know these cheap Oscilloscope Multimeters aren't complete garbage.

[@bartholomewgander540]

I’m waiting for mine to arrive as well, saw this video only after buying it 😂

[@gorak9000]

Dave, you should look at your own forum - there's a thread where we've done a bunch of testing, and identified a bunch of issues already. There are some new firmware versions available, but not all of the known bugs are fixed yet

[@gorak9000]

So the output mode works at the same time the oscilloscope does, but the "other apps, gen" one only works as a standalone generator - you can't use the scope at the same time. In the "output" one that works with the oscilloscope, the regular square wave is fixed at 1khz for the probe calibration. There's a different square wave mode that allows you to change the frequency and the duty cycle. BUT the limitation is if you have the "output" on, it limits the timebases (and sampling rates) available in oscilloscope mode. Took quite a while to figure out that limitation, though it is mentioned in the manual.

[@EEVblog]

That was for the 702S. I didn't see another one for the 703S. Forum currently down, so I can't check.

[@gorak9000]

@@EEVblog The thread is titled 'New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)' - I have the tab open from before (even if the forum is currently down). I also picked up the Owon HDS2202S at the same time - it's definitely a much more polished product - just better in every way, but 3x the price too. Neither of them are my main scope - they're for places the Keysight one shouldn't go - out in the rain, on a ladder, in the back cabinet of greasy cnc machines, etc etc.

[@Aussiechip]

@@EEVblogThat's what I came to find out about. Is it likely to be down for long? Did someone forget to pay your bill? :D Hope it all comes good soon.

[@turbinia]

I bought a 702 off the back of your review of that. It's been pretty good for what I use it for, which is occasional fault finding and testing. If this two channel version had been available I'd definitely have got it for the slightly higher cost - the increased specs are definitely worth it, but I don't think I'd bother to buy it in addition.

[@user-nc1jv9mn6r]

Спасибо большое! Очень подробно и понятно!🙂

[@S_F_U_L]

FNIRSI had a similar one called the DMT-99 which does live trend capture

[@crustyHO]

About time technology caught up and we get a cheap portable o-scope!

[@Kosmonooit]

China came to the party

[@mikedjames]

My 30 year old Philips/Fluke scopemeter 95 is not going to be retired just yet.. it has a 25MHz sampler but an analog jitter added to the clock by putting a lower frequency sawtooth wave on one side of a differential clock so it does make it to 50MHz bandwidth.

[@stark_energy]

I have Zoyi ZT-702 for few months usage and notice that the big drawback is the inaccuracy of amps. The good thing on this is that the measurement of Ohm and Voltage are quite accurate and the Ohm measurement can go below 0.1 Ohm which most cheap multimeter can't. So I never use to measure amps on this one, I use dedicated amp meter to do that. Another big drawback is the inability to save the last mode (but this is addressed in this ZT-703) and the battery drop quite fast when in Oscilloscope mode.

[@DuMOHsmol]

The 702S does remember the last mode with latest firmware update, no submode memory though, it just remembers whether to turn in oscilloscope or multimeter.

[@Petertronic]

Interesting to see this. I have had a 702S for a while, and upgraded firmware twice with no problem, it now remembers the mode after power off (but not all settings). The 703S lets you view saved screenshots, which the 702S did not. However there are still glitches on the 702S, especially when zooming and scrolling through captured waveforms. So I won't be switching to the 703S, I would rather put the money towards an Owon handheld scope.

[@Jose-tw9bl]

Nice review! Thanks!

[@pierQRzt180]

Liked for the yellow pointer (no really it is better contrast). I'd like to have a compact oscilloscope as I do not have much space at home. Thank you for the review!

[@gonzo_the_great1675]

Interesting review. Nice to get these from you. Though possibly getting upset about the 10A/mA issue is being a bit picky.

[@splugereport]

No way. Having it be so wrong / not update when you change ports is crazy bad

[@davadoff]

No way is it ok. It’s well out of spec giving such a false reading.

[@arcadeuk]

I've had a 702S in my toolbox since your last video, so I will be also buying a 703 for sure, worth it just to be able to remember to boot up in multimeter mode 🤣 Being able to have a disposable scope in your toolbox at all times is worth the entry price

[@samuraidriver4x4]

702S also remembers the mode on more recent firmware updates.

[@arcadeuk]

@@samuraidriver4x4 that's good to know thanks

[@guateque1718]

I got the 702 for automotive which is my day job. It was excellent for crank, cam etc signls and with an attenuator is could show spark plug waves. I upgraded to software version 58 I believe and it's has been frustrating ever since. It struggles to do the same things it used to do just fine before.

[@ivolol]

Can you say an example of what it is stuffing up now?

[@guateque1718]

One example is freezing up and being unresponsive to any button except off.

[@fatihyilmaz-Gtr]

is it possible to downgrade?

[@KillerSpud]

They had some nice melf resistors in there. Everybody likes a good melf.

[@SchwaAlien]

Looks a heck of a lot better than the “DSO Shell” cheapo portable scope I ended up buying several years ago.

[@JanaBuvari]

awesome! cant wait to see this review.. now all we need is a chinese special SpecAn!

[@GTechno13]

I would love to see a review video of a good/recommended portable scope.

[@snakezdewiggle6084]

Thanks Dave. Good enough for Australia.!

[@bluesonkel]

my cheep 30 bucks china multimeter has a 10Hz bargraph. i love this litle detail and i use it sooooo often.. the Bargragh is exactly so fast like an analog meter

[@jvseevalenz8324]

i bought one for automotive. works great

[@RonKellam]

"yeah, nah" 😁. Great review. I think I want one in spite of its A/mA range flaws.

[@zacki5663]

For anyone reading, been using this for 2mths now and she is indeed a beast and has had a few firmware updates

[@Mladjasmilic]

For checking EV chargers, this all in one solution would work just fine. For automotive services, it would be nice if it could read CAN messages.

[@shumanchu1]

The needle gauge (bar chart) should definitely go. No use whatsoever. BUT, I think it would be great to put a histogram (voltage vs time) in that spot, so you can see a selectable time slice of previous values (like a little o-scope). Automotive multimeters have done this for a long time, and it is very useful when you are trying to capture some kind of change in value over time and you have step away from the meter in order crank the motor/press the gas/whatever.

[@Xaelloss]

The reason they laser off the markings is to make it difficult for other Chinese companies copying it, not stop us from learning... Plenty of those that would just make a 1:1 ripoff with no thought process whatsoever and that's usually enough to put them off.

[@WacKEDmaN]

for the price..thats really nice for a maker or tinkerer...

[@calholli]

At least it does tell you to swap jacks on A vs mA... I give them credit for that.

[@alexandrecouture2462]

I still have my mini dso form a decade ago, made in a mp4 player enclosure.

[@smmbdev]

It says in the manual that you should put it in the High-Speed mode for frequencies >30MHz. Maybe that's why it didn't trigger after 30MHz.

[@Razvan_N]

I'd love to see the TEMPERATURE reading back, as the 702S had.

[@samuraidriver4x4]

I recently grabbed the 702 due to your video more or less because i needed another meter and didn't know if i had use for an oscilloscope and want to see if i would use it. Apparently i do use one now that i have the option and eventhough it is pretty limited i figured out its still very handy. now debating if i should get something like rigol to sit on my bench. Mainly tinkering with arduino's and stuff like that. Spotted at 19:45 that they did fix the screw clearance on the 703.

[@-Graham]

I just got one. I've never had a scope before and the price seems right to learn with this, especially as it seems somewhat rugged and more splash proof than a bench scope. Also, it wouldn't be a big deal if it died somehow

[@jacquesgilbert2774]

It can be very useful to connect probes without worrying about grounding. SMPSes in particular must be responsible for too many early scope deaths.

[@mroek]

Dave, at 3:20.There is a small difference to be spotted. There's a little temperature/thermometer icon above the positive terminal (bottom right) at the left/old version. The new one doesn't have that.

[@robinsattahip2376]

The battery is too tight in the plastic holder, the spring is fully compressed. This was mentioned by some other evaluators and was true with mine. Since the battery holder is made of plastic it will eventually break. This can be lessened by slightly shortening the spring on the negative battery terminal.

[@bxl181]

I just inspected my 3 week old Zoyi. I had to use a plastic spudger to lever the battery out of the holder as the spring was so tight. I tried using a cheap small diagonal wire cutter to shorten the spring but the cutter failed miserably. Ended up inserting a cross head screwdriver into the end of the spring to hold it steady, while using a Dremel cutting disc to remove two turns of the spring, one turn at a time. Battery now can be inserted and removed easily.

[@minus3dbintheteens60]

For the 702, i read about a year ago on the product page there is a warning that a certain firmware is NOT upgradable. I dont know if it was that firmware specifically, but I 💯% did read that

[@MrNoobed]

Best digital bar graph i saw was on my fluke 990 copperpro. That was best at testing insulation and seeing if it breaks down though

[@RemiBusseuil]

It is a crazy price for a full product! A Fluke like that would cost a couple thousand $

[@38911bytefree]

It is crazy, but Fluke Scopemeters, at least the vintage one where rugged and really you get your money back because you can use them, all thay long and they never break down. Even the probe were overkill. They are expensive, but they delivers value. For casual probing I wouldnt even bother to think in a Fluke. This is hats off to the Chinesse, that made scope affordable and there is one for every budget. You can use it with some freedom,, you dont need to be so carefull ... in the event you damage the front end, you can afford another one.

[@RemiBusseuil]

@@38911bytefree Well actually i had a quick look at ebay and the Fluke 123 sells for around 400-500$. Might be worth comparing the 2. But personnally I would always prefer using a picoscope in any situation

[@synthetic4]

as with all oscilloscopes: x10 and adjust your probes' capacitance for higher frequencies

[@DrRChandra]

At around 11 minutes...I think the beeping is due to the battery level. The graph near the upper right is showing a rectangle with a red line; I think that's the battery level indicator.

[@radekb9479]

Ehh czekam kiedy wejdzie sztuczna inteligencja i filmy z tego kanału będę mógł słuchać w j. Polskim pozdrawiam autora.

[@qzorn4440]

This scope is really nice for hobby benches and the 5 digits is very cool. This little guy can do lots before getting the big scopes out. 😎 Thanks for the video. It looks like the bar graph is just setup for 25000 counts? Good for watching things like a DC motor speed going up and down?

[@EEVblog]

Nope, the whole idea of a bargraph is that it's faster updating than the display, in this case it's not

[@qzorn4440]

@@EEVblog Thank you.

[@Nesha_ins]

The problem with screwing the probe in lock-tight-position is with the sticker on the bottom of the case for the BNC terminals. The tolerance is too small, e.g. the sticker is thick enough to block screwing the probe in the right position. The problem with this is that, if you don't set the probe right, you'll never know wheather the measurement is correct or not. I have removed the sticker under the terminal (leaving the half to cover the other hole on Zoyi ZT-702) and now the probe (and every other BNC connector) locks in place.

[@paulmorrey4298]

Thanks

[@circuitdotlt]

what's the power draw when switched off? I mean how long can I store it? Or how often will it be dead every time I need to use it?

[@anthonywilliams7052]

Yes, definitely want bigger digits than a slow bargraph.

[@stevenwilliams6258]

Agree, bar graph must be scaled to the selected range to be useful. I have never used the bar graph on a meter - what, I have a digital readout and I want to see if is about ... Larger digits would be better.

[@sonnyjimbod]

100% on the bigger digits. Bar graph displays are of only very limited use and I'd like to use those pixels for something else please Zoyi!

[@38911bytefree]

Yeahhh or ... dual display, like Sanwas ... or some UNITs, DC plus AC or AC plus Freq .....

[@nikkicarlson8511]

Doubt that battery is real 3400mah, probably 2500 or less, off brand 18650s are rarely up that high but maybe they'll surprise me ..

[@bennguyen1313]

Regarding the 23m mark, is it common to do the length-matching on the adc's digital outputs? I assume this would be only for parallel interfaces (i.e. not spi) and only for fast (>? Mhz) , and only if the traces need to travel a large distance (>? mils) ??

[@jimmyers8795]

Thanks for the review, I just ordered one (£64) including free shipping to the UK. For that money it's a total bargain. I hear all the blah blah blah about this isn't perfect and that isn't perfect - of course it isn't perfect, IT'S £64!! for a multi-meter and a 2 channel scope!! Keep those reviews coming, keep safe.

[@Psi105]

This would be an awesome product if they could isolate the two BNCs from each other. Imagine a sub $100 50mhz handheld 2cb scope with isolated probes.

[@quantumlab9130]

Definitely can have some purpose in the automotive field where all signals are pretty low speed

[@tohaason]

The diisplay says '"Mhz" (should be MHz of course), but at the same time "KHz" (edit: And that is wrong too - see below) is written correctly at at different part of the screen! (and that "Mhz" thing even changes to "MHz" when the range changes!)

[@vihai]

The proper way to write kHz is with the lower case k.

[@tohaason]

@@vihai Of course - lol, I was so focused on the other so-obvious error that I didn't notice that one! A slight Q/A problem in that factory.

[@iamdarkyoshi]

The bargraph showing the reading in terms of counts might be vaguely useful for something, like reaching the end of a range, but like... give me min/max, frequency, ect with the extra space....

[@sirtra]

Would be nice if the bar graph was like a UV meter with a peak indicator that slowly drops back down if you know what i mean... there would actually be a use for it then 😊

[@horusfalcon]

Yeah, milliamps not accurate enough for process instrumentation use, but good enough for general use. Auto-range on the scope is very slow, Very thorough review and shakedown. Well done!

[@hirusthehellhound]

You shall do a jerobeam fenderson oscilloscope music test when it comes to 2 channel oscilloscope test

[@spodule6000]

single beam oscilloscope < dual beam oscilloscope < jerobeam fenderscope

[@neergh8886]

Dave, do you think this MM would be okay for analysing serial comms e.g. Modbus? Thanks for the review.

[@JoelBergmark]

Awesome device need to buy one 👍 But yeah the bar graph should be removed or fixed :)

[@PhilipBallGarry]

The range socket vs range problem would be easily sorted with probe insertion sensing. Kaiweets can do it on their very cheap meters.

[@whirltech8031]

Regarding the voltmeter: Maybe the bar graph auto-ranges no matter what? For example the meter is in a fixed (manual) lower range, maybe the bar graph will auto-range no matter what and let you know how far out of range you are relative to the fixed range selected?

[@annieworroll4373]

yeah that warning is kinda important. I suspect that's how I damaged my old meter. Thankfully my current one(your BM235) yells at me if I set it up to do that.

[@robinsattahip2376]

If someone cannot diagnose and replace a blown fuse, they do not need an oscilloscope anyway.

[@arcadeuk]

The ZOYI guy in the comments on your last video said yours was not firmware upgradeable, but the retail ones are.

[@b747xx]

Please test the ZEEWEII DSO3D12. It seam to torch all of the other cheap Chinese hand held scope/multimeter.

[@MrTurboturbine]

Nice meter.

[@stoptheirlies]

Hi Dave, thanks for the review, Please could you show us how to Un Brick the 702, because what happened to you will happen to us and I can't find anything anywhere to show us how. Bob. UK

[@davadoff]

You probably need to desolder the chip, put it in a device used to download & flash firmware using a computer, flash the original firmware or a compatible one, and then finally reinstall the chip into the multimeter.

[@bnunesc]

Thanks for the video. In your opinion what is the best oscilloscope under $200 in the market currently? I am really considering a handheld formfactor as I won't use it very often but am also open to buy a bench one. Thank you

[@dongwarrenmusic]

8:44 yeah sir dave, it might remove some lag if they remove that useless bar graph. Improve some speed and bigger digits. Let's wait the 703s or the 705s without bar graph and cleaner screen. 😅

[@LawpickingLocksmith]

As a voltmeter it is not yet a Brymenkiller. But because it is all singing and dancing the blue ones could be the Brylcream for the red's hair?

[@manoffire11]

I wonder why they are being sold under different names like zoyi, zotek, bside... Anyway, I bought the bside 702 for vehicle repairs and hobby electronics and it's been good enough for that sort of stuff.

[@EEVblog]

Zotek are the designers, Zoyi seems to be their own own brand, and then they OEM to the likes of ANENG.

[@bertblankenstein3738]

When you were using the built-in function generator, I noticed the one ground was not connected. Perhaps the probes do not share a common ground? And that might produce different signal levels?

[@anotheruser9876]

Volt scales for the two probes were different as well.

[@ccoder4953]

If they could fix some of the annoying bugs, seems like a really good instrument for quick field tests. Like automotive work, for example. Professional mechanics might have something better, but, for most people, this would be way easier to bring out to the car to diagnose issues than hauling out a full oscilloscope and power cord, especially since the price is reasonable.

[@TheCurtisnixon]

never even used an analog meter. well, once, as a demonstration that it worked for a friend...

[@michaelroberts1120]

So Dave actually writes home to his Mum with the component level descriptions of the electronic gadgets he tears down?

[@ralmslb]

Would love to know what would be considered to be reliable brands for a device with similar specs and capabilities. Like are Uni-T to be trusted?