That drift is a bit disappointing, the rugged look of the meter makes me fear that these will be handed to field technicians. I would like to see it switch cycled but honestly i'm more worried about the rubberized coating on the switch, i think that would degrade first given time and skin oils.
You need to look right before the transitions. Its about 40uV from -8 to 60C. It does take a long time to stabilize but its about 10X improved over what my original UT61E was.
Using the nanoVNA to detail the impedance change with frequency was a great followup to the destruction in part one. We can see how the lack of resistors in series with the ptc's caused said destruction. Good teaching. Your detailed testing of meter circuit robustness could be a learning reference for anyone designing an input circuit. Too bad the meter is altered. I'd like to know it's ultimate voltage limit. Time for the mechanical test which is another excellent demonstration of the effects of design choices. What other class of devices could you review and provide a similarly instructive introduction? I don't know, but I'd like to see it.
By class of devices, I assume you want to see toasters and dishwashers tested. I really have no interest in it but I bet you can find other channels that show other kinds of products.
Haha. Testing robustness of dishwashers or precision of toasters might be a distraction. Testing low cost oscilloscopes might be good area. More $$$ investment needed. Throwing them off the roof might not be as fun. I expect you could get them to pop though.
@@jspencerg There's not a lot of equipment that is designed to be this robust. I don't even know what I would do with scopes for example when looking at how robust they are. They plug into the AC outlet for the most part and there are standards already that they should be meeting for that. I could do some sort of functional demo but I bet there's a lot of channels like that today. The other problem, I would want to look at good scopes. On par with what I use. More $$$ is right. Imagine, doing the $10-$20 scope shoot out. 10 scopes. I would need some serious coin. Then there's the time to do it. You can't just take them out of the box and give them 5 stars..
All good points. I can't think of any investigations as useful, affordable or entertaining as your dmm reviews. A video chronicle of your race bike build would have be great. I have an affinity for Suzuki. My first street bike was an '81 GS750.
Let’s life cycle the switch Joe. I’m surprised it survived the transient tests. Even with upgraded transistors it seems the layout must be better than the original or it most likely would have arced at some point.
I'm also surprised that the meter has survived ESD and now the low voltage generator. I wonder how a stock one would handle it. It's really too bad that they oversold the frequency counters upper limit. Had they considered someone may actually test it, maybe the meter would still be stock.
@@joesmith-je3tq When this E+ model hit the market and seen some videos of a tear down I thought it looked like it might be more robust since they added more input protection and the layout looked less susceptible to arcing, at least around the protection circuitry. That was one reason I inquired maybe checking it out back when it came out. I swear they probably watched your modifications of the original 61E after how miserably it failed one ESD shot from the grill starter and how well it performed after your re-engineering of it. You need to get Brymen to make a JS model meter! They put Dave Jones brand on two and he has the other. You’ve done more engineering on these than probably their design engineering departments. I think Brymen truly appreciates you and listen to your input. The company that built the 121GW probably not so much 😉. Alway look forward to seeing a new video from JS! Love your new Dog by the way. I’m a Dog person too. My dad and I always had Beagles growing up for rabbit hunting. My mom used to baby them like lap dogs, could barely get them to go hunting time she spoiled them! God rest her soul, she sure took great care of her pups. I haven’t had a Dog in my life in almost 20 years since the last Beagle died.
@@SIXSTRING63 I have no interest in selling meters or getting into sales or distribution. So you won't find a rebranded JS meter anytime soon. I wonder how a stock 61E+ would hold up. It could very well be taken out with the gas grill igniter. We will see how the plastic holds up over the next few days.
@@joesmith-je3tq Didn’t figure you did, wishful thinking I guess. They must use the EEV Blog branding as a good marketing scheme since the channel and blog site has such a big following.
Excellent review and video. UT61E+ has Diode measurement Open circuit voltage of 2.9V. Can you suggest any possible small modification to increase this from 2.9V to at least 3.2V ? Thank you for the attention
Bought all my Brymen meter's because of Joe's videos, plus my pristine Fluke 189 I got about 4 years ago for a good price. Most in depth DMM testing on TH-cam. I wish I had about 1/10th of his knowledge.
I would definitely like to see the switch test. After that since the data isn't usable I vote for self destruct. If nothing else it could show the potential the meter could achieve with a small amount of upgrading. I understand that modding DM meters is bad and can lead to catastrophic failure, but we all know it still done. I don't think ptcs and transistors being replaced is the problem in this regard. A great man once said "know your limitations".🤕
@@joesmith-je3tq Can’t blame you there, I can only imagine the litigation that would evolve over someone modding a meter going by a video explanation of how to by a TH-camr and said person getting zapped by doing it wrong. I’ve repaired quite a few meters but have never modded any, just simple stuff like display issues with bad contact on zebra strips or blackened reflective backing on display or UV damaged polarizing film that I replaced or bad or out of tolerance components. I must say mine turned out better than Dave’s latest video attempts on that old Fluke display. I know he could do it right but it wasn’t a very impressive result if viewers were interested in how to repair it right.
Two questions as I'm rewatching some of your simpler applications of the nanovna. 1. Could something useful be learned from similarly testing the LoZ mode on the 61e+? 2. What Z characteristics did you build your common mode transformer to?
Have you any possibility to test meters on -20 celsius. I really have seen some funny things, just trying to measure mains. Some ghost voltages and with warming up Flirt DM93 i got different values with ACV.. Just basic measurements, with Flir on silicon test probes.
Further transient electrical testing is not terribly informative since the meter is modified. I agree with you that the most informative test would be the mechanical test of the switch since your modifications should have no effect on the switch function. Why did you do the impedance test in resistance mode instead of voltage mode? To me the impedance of the meter in voltage mode is the most interesting and is in the mode your RF generator fried the protection circuitry. All of the waveforms you show on the scope are positive going. Is that the case or does your transient generator put out negative waveforms as well? If the waveforms are always positive going that is the case why do you leave the 0V setting in the middle of the screen instead of moving it down so you get more resolution on the screen? If the generator is putting out both polarities leaving it in the middle make sense.
This would have been better posted in the forums. The UT61E+ was NOT damaged in the voltage mode as you suggest. I stated during the video why I chose this mode but to be clear, I doubt the meter would have been damaged in the voltage mode with that same setup. The generator only puts out a positive waveform. That has been the case since starting the tests. There's a reason I flip the leads and I state so during the video. Yes, I could move the waveform down if I wanted more resolution. I suspect I have done that for some reviews. In others I have not used the scope and in some I have used my old Fluke handheld scope. While I have explained the reason I use the scope, you seem to have missed it. It's only there so I can get some indication that the meter is beginning to fail. I really don't need higher resolution for that. It's just a quick visual.
I don't delay my videos. They are available as soon as they are uploaded. No games, no tricks. You watched early and did not give TH-cam any time to process it.
How about just let it finally rest? :) Meanwhile I'm really shocked about the build "quality" of that oscilloscope casing there. One would expect a little bit better materials if one must leave a smaller fortune at the cashier for it...
The metal chassis is really poor quality as well. One of the connectors had been replaced on it and of course many of the knobs fell off. It's not at all what I would have expected from LeCroy. To bad as I really like the scope.
That drift is a bit disappointing, the rugged look of the meter makes me fear that these will be handed to field technicians.
I would like to see it switch cycled but honestly i'm more worried about the rubberized coating on the switch, i think that would degrade first given time and skin oils.
You need to look right before the transitions. Its about 40uV from -8 to 60C. It does take a long time to stabilize but its about 10X improved over what my original UT61E was.
Pinned as others have also asked this same questions.
Using the nanoVNA to detail the impedance change with frequency was a great followup to the destruction in part one. We can see how the lack of resistors in series with the ptc's caused said destruction. Good teaching.
Your detailed testing of meter circuit robustness could be a learning reference for anyone designing an input circuit.
Too bad the meter is altered. I'd like to know it's ultimate voltage limit. Time for the mechanical test which is another excellent demonstration of the effects of design choices.
What other class of devices could you review and provide a similarly instructive introduction? I don't know, but I'd like to see it.
By class of devices, I assume you want to see toasters and dishwashers tested. I really have no interest in it but I bet you can find other channels that show other kinds of products.
Haha. Testing robustness of dishwashers or precision of toasters might be a distraction.
Testing low cost oscilloscopes might be good area. More $$$ investment needed. Throwing them off the roof might not be as fun. I expect you could get them to pop though.
@@jspencerg There's not a lot of equipment that is designed to be this robust. I don't even know what I would do with scopes for example when looking at how robust they are. They plug into the AC outlet for the most part and there are standards already that they should be meeting for that. I could do some sort of functional demo but I bet there's a lot of channels like that today. The other problem, I would want to look at good scopes. On par with what I use. More $$$ is right. Imagine, doing the $10-$20 scope shoot out. 10 scopes. I would need some serious coin. Then there's the time to do it. You can't just take them out of the box and give them 5 stars..
All good points. I can't think of any investigations as useful, affordable or entertaining as your dmm reviews.
A video chronicle of your race bike build would have be great. I have an affinity for Suzuki. My first street bike was an '81 GS750.
@@jspencerg Nice. There's a video of the old GS on the channel that shows some of the last modifications.
Let’s life cycle the switch Joe. I’m surprised it survived the transient tests. Even with upgraded transistors it seems the layout must be better than the original or it most likely would have arced at some point.
I'm also surprised that the meter has survived ESD and now the low voltage generator. I wonder how a stock one would handle it. It's really too bad that they oversold the frequency counters upper limit. Had they considered someone may actually test it, maybe the meter would still be stock.
I agree :)
@@joesmith-je3tq When this E+ model hit the market and seen some videos of a tear down I thought it looked like it might be more robust since they added more input protection and the layout looked less susceptible to arcing, at least around the protection circuitry. That was one reason I inquired maybe checking it out back when it came out. I swear they probably watched your modifications of the original 61E after how miserably it failed one ESD shot from the grill starter and how well it performed after your re-engineering of it. You need to get Brymen to make a JS model meter! They put Dave Jones brand on two and he has the other. You’ve done more engineering on these than probably their design engineering departments. I think Brymen truly appreciates you and listen to your input. The company that built the 121GW probably not so much 😉. Alway look forward to seeing a new video from JS! Love your new Dog by the way. I’m a Dog person too. My dad and I always had Beagles growing up for rabbit hunting. My mom used to baby them like lap dogs, could barely get them to go hunting time she spoiled them! God rest her soul, she sure took great care of her pups. I haven’t had a Dog in my life in almost 20 years since the last Beagle died.
@@SIXSTRING63 I have no interest in selling meters or getting into sales or distribution. So you won't find a rebranded JS meter anytime soon.
I wonder how a stock 61E+ would hold up. It could very well be taken out with the gas grill igniter. We will see how the plastic holds up over the next few days.
@@joesmith-je3tq Didn’t figure you did, wishful thinking I guess. They must use the EEV Blog branding as a good marketing scheme since the channel and blog site has such a big following.
A Great video. Mechanical switch test seems most interesting - not affected by the modifications.
Excellent review and video.
UT61E+ has Diode measurement Open circuit voltage of 2.9V. Can you suggest any possible small modification to increase this from 2.9V to at least 3.2V ? Thank you for the attention
Nice work. Bought a Breymen 869S to go with my 789. Thanks for the look.
Bought all my Brymen meter's because of Joe's videos, plus my pristine Fluke 189 I got about 4 years ago for a good price. Most in depth DMM testing on TH-cam. I wish I had about 1/10th of his knowledge.
Great videos, excellent job.
The display screen of my UT61E+ got damaged (cracked). Where can I buy one?
Thanks
I'd like to see the switch life tested. Nice video and dog Joe.
That's a great dog right there.
I would definitely like to see the switch test. After that since the data isn't usable I vote for self destruct. If nothing else it could show the potential the meter could achieve with a small amount of upgrading. I understand that modding DM meters is bad and can lead to catastrophic failure, but we all know it still done. I don't think ptcs and transistors being replaced is the problem in this regard. A great man once said "know your limitations".🤕
I'm sure people mod their own meters. Many have written me about it. But it's not something this channel will ever promote.
@@joesmith-je3tq Can’t blame you there, I can only imagine the litigation that would evolve over someone modding a meter going by a video explanation of how to by a TH-camr and said person getting zapped by doing it wrong. I’ve repaired quite a few meters but have never modded any, just simple stuff like display issues with bad contact on zebra strips or blackened reflective backing on display or UV damaged polarizing film that I replaced or bad or out of tolerance components. I must say mine turned out better than Dave’s latest video attempts on that old Fluke display. I know he could do it right but it wasn’t a very impressive result if viewers were interested in how to repair it right.
Até o cachorro veio da uma olhada nesse multímetro uni-t ut61e+😂😂
Amazing job, thank you for the video..
Two questions as I'm rewatching some of your simpler applications of the nanovna.
1. Could something useful be learned from similarly testing the LoZ mode on the 61e+?
2. What Z characteristics did you build your common mode transformer to?
See your second post.
Have you any possibility to test meters on -20 celsius. I really have seen some funny things, just trying to measure mains. Some ghost voltages and with warming up Flirt DM93 i got different values with ACV.. Just basic measurements, with Flir on silicon test probes.
At home, what you see is what I have. -8C is about it.
Thanks for information
Further transient electrical testing is not terribly informative since the meter is modified. I agree with you that the most informative test would be the mechanical test of the switch since your modifications should have no effect on the switch function.
Why did you do the impedance test in resistance mode instead of voltage mode? To me the impedance of the meter in voltage mode is the most interesting and is in the mode your RF generator fried the protection circuitry.
All of the waveforms you show on the scope are positive going. Is that the case or does your transient generator put out negative waveforms as well?
If the waveforms are always positive going that is the case why do you leave the 0V setting in the middle of the screen instead of moving it down so you get more resolution on the screen? If the generator is putting out both polarities leaving it in the middle make sense.
This would have been better posted in the forums. The UT61E+ was NOT damaged in the voltage mode as you suggest. I stated during the video why I chose this mode but to be clear, I doubt the meter would have been damaged in the voltage mode with that same setup.
The generator only puts out a positive waveform. That has been the case since starting the tests. There's a reason I flip the leads and I state so during the video. Yes, I could move the waveform down if I wanted more resolution. I suspect I have done that for some reviews. In others I have not used the scope and in some I have used my old Fluke handheld scope. While I have explained the reason I use the scope, you seem to have missed it. It's only there so I can get some indication that the meter is beginning to fail. I really don't need higher resolution for that. It's just a quick visual.
360p? What happened, the ordinary camera did not pass the HV tests? :D
I don't delay my videos. They are available as soon as they are uploaded. No games, no tricks. You watched early and did not give TH-cam any time to process it.
@@joesmith-je3tq In fact, after my comment, at the refresh it revealed the 720p variant...
great video as usual!!!
Which state/region are you from Joe? Or rather, what dialect do you have?
USA
How about just let it finally rest? :)
Meanwhile I'm really shocked about the build "quality" of that oscilloscope casing there. One would expect a little bit better materials if one must leave a smaller fortune at the cashier for it...
The metal chassis is really poor quality as well. One of the connectors had been replaced on it and of course many of the knobs fell off. It's not at all what I would have expected from LeCroy. To bad as I really like the scope.
@@joesmith-je3tq What a shame from such a high profile brand...