I have various hobbies including electronics. Here you will mostly find benchmarking of various handheld multi-meters. I am not affiliated with any company distributing or manufacturing meters. For the most part, meters are purchased out of pocket. I run these test purely out of my own interests and make them available for free to the public. I have no plans to use patreon or enable ads. I appreciate those of you who have offered to provide me with meters and such. I have not looked into setting up a PO box. For those of you wanting to support the channel, your views and feedback are more than enough.
The data for the meters I have tested may be found here:
docs.google.com/spreadsheets/d/1cXzYpIoyVm9QJUju4KXqM22CEQZP3_xwWvDyeVwxTy4/edit?usp=sharing
Answers to Frequently Asked Questions may be found here:
docs.google.com/document/d/1gEPFeOZpsNSm0-7sA98w2P5XE5x77Oal9dQEYvQnF6g/edit?usp=sharing
Enjoy your stay.
Пікірлер
Hello Joe, I am impressed with each of your videos and I can see that you have a passion for multimeters and an enviable knowledge. I wanted to ask how long it takes you to charge the UT181A for example from 50% to 100% it seems to me that this device has a battery charging problem. Thank you in advance
I don't use this meter very often. If I know I am going to be using it, I plug it in the night before and let it charge overnight. It is done when I get up. Eventually the battery will need replacing.
I have something really nice for you to lookup to, maybe China vs Taiwan will make a difference GW Instek GDM-541 seems a lot like the UT161E
Джо,на каком референсном напряжении вы настраивали мультиметр после замены деталей и добавления цепи термокомпенсации?
I assume what ever it was originally, or it would have thrown the OEM's alignment.
@@joesmith-je3tq Но вы же меняли детали,в том числе переменный резистор,неужели после замены вы не настраивали переменый резистор по эталонному напряжению?
One of those evergreen videos that is very relevant today. Thanks for this I’ve just ordered a new not so cheap vna and I’m now fully aware of what not to do with it
Thanks for sharing the video regarding the 32-bit ADS. We are measuring voltage in the range of microvolts to millivolts using a 32-bit ADS1262 connected to a Raspberry Pi. We are facing a problem when going below 10mV; the ADC goes into a saturation state, meaning it shows the same output regardless of the input values provided. Any advice on how to accurately read signals below 10mV, even though the ADS1262 is designed for low-level signal measurements, would be greatly appreciated.
Very good information, I wish I had the expertise to design and build one of these. I was disappointed that you did not provide a schematic and parts list.
Sadly you completely missed the point that there is no one right solution. I too am disappointed.
Я установил микроконтроллер для управления подсветкой и управлением передачи данных или автоотключение мультиметра,очень удобно.
It's very kind from you for this video.
LOL you would not be laughing if that was an Agilent VNA ! The applied voltage across the quartz plate is much lower than the applied voltage due to the air gaps in the FT-243 crystals. It would be very interesting to repeat your experiment with HC-6U crystals that have no air gaps ?
At 12:06 I mention the cost and why I did not use my PNA. There was also a part II that goes into detail on why it happened. It appears I also talk about why I did not use the smaller crystals. kzread.info/dash/bejne/aKlmubWQeZS5csY.html
??? @ 15:18 The 115 is older, is what I believe You meant to say?
Yes, 115 is older.
Excellent
Джо,а почему вы использовали два последовательных резистора 500к вместо одного 1М?Чтобы повысить рабочее напряжение последовательной цепи с 200 до 400 вольт?
Video is now 7 years old. You would need to provide me with a time stamp.
@@joesmith-je3tq на 33.56 вы говорите что установили два последовательных резистора по 500 килоом,почему два последовательно,а не один на 1 мегаом?
@@user-mi8so5fj1v It is possible that I did not have a 1M on-hand, or I wanted to give it a better chance to survive the ESD event. Possibly both. It's also possible that mechanically to fit the parts, I used it to get a longer length. As the video mentions, the goal is not to give the kids something they would cut and paste. It is more just going over some of the basic steps involved. The mods I show are for educational purposes only. I would never suggest anyone modify any safety related product.
@@joesmith-je3tq спасибо за ответ Джо.Я использую этот мультиметр только в низковольтных цепях,в своём хобби,просто хотел немного его улучшить в плане защиты.Вам огромное спасибо за полезную информацию.
@@user-mi8so5fj1v Rather than wasting time, most likely causing more harm than good to your tools, I suggest buy tools that meet your needs. The meter shown in this video is clearly marked so if it somehow ended up in someone else's hands, they would know not to ever use it. My plan is to destroy all of the meters I modified to avoid this potential scenario.
Could You change a scale of rpm's (up to 15k rpm) and at the odometer (scale from 0 to 420 kph (261mph))? So that they are at least as accurate as in the original scale.
Sounds like you are asking about making new scales for the two gauges. That is certainly possible.
@@joesmith-je3tq scale will be ready by then added to the cluster. So at Yours ground will be only to program.
@@dominikbratko7646 It wouldn't help you with the tach but there was a company who sold a small box that sat between the pickup and head to allow you to use different sprockets. I wonder if they allowed for that high of MPH. It may be easier to get an aftermarket cluster.
Interesting- thanks Joe!
It could be nice if the program contained indicator when acquisition is done (like blinking LED picture) - it will be much easier to understand what is going on. Currently it is not clear if the program is hanging sometime, or it is waiting for data to be acquired...
I am not sure what you mean. Assuming you are using the latest version of Solver64, if you select the Setup/Diagnostics, to the center right there is something called Point Index. This is incremented on every sample received. SweepTime is how long it took to measure the entire sweep. I've not ran into it hanging but it's certainly possible you have uncovered a problem. You would need to provide more details about what you are seeing.
There is a link to a thread I started on the EEVBLOG site. If you decide to provide further details about the problems you are seeing, feel free to post them there. I am in the middle of making changes to this software for an experiment I want to run, so this would be a good time to change it or fix any problem you may have found.
Standard test for wire is to have a bath of slightly saline water, and the wire in the water, so as to find the weak spots in the insulation. For the better manufacturers they use a salt water section in the cooling path for the extruder, and a paint marker to dab a blob of paint on the wire, so that that roll of wire can be pulled out, and then recycled, or cut into 2 smaller reels for sale as short rolls.
I was referring to the leads, not the wire. Their is a separate standard for them, just like the safety standards for the meters.
Excellent video, as always. Thanks!
I’m pretty sure if that was my leads I would be eol. Great video! 😊
BM869S, over 40kV from a failing high energy devise. At the output of the devise was an open 75k resistor that exploded. The Brymen was at a point that should be 400Vand exploded. Measuring with a 40kV probe at that point the an other meter gave overload (max voltage it could display was 50kV ) The Brymen had an exploded PTC, 3 dead MOVs, a burned trace. After replacing the parts and repairing the tracxe, the Brymen is still working fine and within cal.
I'd imagine it should have evaporated at that voltage and if the source was low enough impedance (high energy). It's interesting that it didn't, even despite there's no HRC fuse (or any fuse for that matter) in the voltage input path.
Pretty amazing, because at 40+KV, you would figure that any arc that started would continue to just burn and irrepairably damage the meter's innards. That kind of voltage would most likely easily jump and sustain a 2 inch gap once an arc is started.
@@poormanselectronicsbench2021 I work behind an adjustable over current protection circuit and a big red kill switch just in case. So it can not continue otherwise the meter maybe would have been in worse shape. ( trace between input and MOVs burned away)
@@pa4tim The only time I work with voltages that high are involving automotive ignition systems. There isn't enough energy to make a DMM explode. It could certainly damage one.
Great video. Love how you showed how you tested. Would have also liked to see how you restored it. Good job!
Bob Pease, what a legend! :)
For a 9V battery, 61mA, that is BAD!!!!!!!!!!!!!!!!!
Maybe a backpack car battery might do better :) .seriously though, I am impressed such a probe exists, but does it cost less than a house?
It is not an insignificant current draw, but the battery life is still reasonable if you remember to switch it off after using it. Replacing the 9V with a litium battery or other floating supply is also an option.
@@stevenbliss989 It does cost quite a bit less than a house. Around $225.
@@LasmuxDevices A floating (VERY HIGH & LOW CAPACITANCE ISOLATION) supply would be good, and if I ever need this probe I could build one.
@@LasmuxDevices It is for a 9V battery. Lithium might do better, although with the smaller cell inside the pack, along with a boost converter, might not be so much.
Does the Brymen869 beep for diode checks?
Not that I am aware of but mine are now fairly old. Download and read the latest manual for up to date info, or contact the manufacture.
LOL… CEM is a very big company that makes products for many others such as: Extech, Southwire, Triplett, Amazon Commercial, etc They do have some very good units
Very informative, thanks!!
Seems good for $300
Thanks for the good demonstration, it was very interesting.
I won't be twisting my Radio onto my cables anymore. Thanks!
Очень познавательное видео,спасибо.Если я верно понимаю,штатый делитель напряжения остался неизменным,за исключением подстроечного резистора VR1,который вы заменили на 1к.А так же вы допаяли дополнительную последовательную цепочку 6.65к 1% и диод BAV199 параллельно керамическому конденсатору С17,кстати какой у него номинал ёмкости и вид диэлектрика?
Being it was seven years ago, I would be guessing. Judging by the package size, appears to be X7R. I would expect COH/NPO to be much larger. From the video, keep in mind there is no once size fits all. You will need a thermal chamber to compensate one. Still, those values may make a good starting point. Good luck.
@@joesmith-je3tq благодарю,жду когда приедут детали.
Wrapping boards are Amazing 😮
Any interested people out there following along stay away from 11.0Ghz as this is used for satellite Broadcasting.
A VNA presents very low power.
What about having a look at the ZERO IF transceiver for 10Ghz
I don't have a lot of interest in radio and don't hold a amateur radio license. That said, they do use 10GHz and I would guess some of the amateur radio YT'ers would be more than willing to put together a review for you. Wouldn't hurt to ask them.
Great review! I think i will buy this model, for the simplicity of operation compared to UT18. I just did't get one of the comments, about the continuity test. Will it buzz in resistances in the order of tens of kOhms?
I still can't get over the fact that we can communicate from one end of the world to the other with such a simple device. This is astonishing. I am designing a spark transmitter that can operate in Hellschreiber mode using the Chaffee gap, in addition to microphone modulation. May the delicate vacuum tubes and cheap transistors can go to hell.
Look at old photos of Marconi's station in Kahuku Oahu to get an idea of what it took to reach the end of the world. It's amazing how far mankind developed this technology in a such a short time span. Also how so many other areas of technology fed into that, like space flight for example. I posted some screen shots showing a gap cycle time of 40kHz using this ignition coil. That was the fastest I was able to achieve.
@@joesmith-je3tq Yes. Very large antennas are required. However, the Chaffee gap consists of trains of damped waves that meet each other in the correct phase in the 2nd or 3rd cycle. Practically they are very close to the continuous wave. They can also operate up to 15 MHz. Maybe you know. Even a small improvement like Telefunken's multi-plate discharge gap provided a huge increase in range and allowed for sharper tuning. Proper grounding and inductive coupling also serve these purposes. Given the quality and accessibility of today's materials and the advances that have been made in physics, I am hopeful that an acceptable transmitter can emerge, based on this technology.
@@AlexBurtonMusic If you decide to post about it, provide a link. Or, feel free to use the one I provided on the EEVBLOG.
@@joesmith-je3tq Of course. I would love to share it when I complete my project. Thanks.
At 15:41 the LED started to glow before you triggered the grill starter.
You may have noticed it also started glow right after resetting.
😅interesting😮
Fantastic item....😅😮😂
ive started making my own transmitter based off this design. the radio experimenters handbook is a very good source for information!
If you decide to post about it, provide a link so we can have a look. If you would like to see the last transmitter I constructed in operation, check out the following: kzread.info/dash/bejne/e6yAurOddsy_pKw.html
I’ve been watching your videos for years now, and realized you’re a Suzuki guy. Nice!! The Hayabusa is a BMF!!! I’m starting a modernization project on my 1989 GSX/R 1100. With all your experience with Suzuki electronics, would you mind if I asked you some questions regarding my little experiment?? I didn’t want to just lay it all out here and have the world comment on it. Thanks for all your great videos and software. They’re an invaluable resource to anyone trying to learn Radio, ECE. Just an FYI, I use your vna software and read the documentation regularly. Thanks for taking the time to write it all. Side note, you should make a paid video series on how to make a program like Solver64. I’d pay for that in a heart beat. Anyway, let me know if I can pick your brain about my GSX/R experiment. Thanks again
KZread comments is a poor platform to start such a conversation. If you want the world to comment, consider creating an account on EEVBLOG or other forum. Start a new topic and provide me with a link and we can get started.
How are you measuring the signal strength to the antenna?
Are you asking about the aerial current?
Which is a old meter marked "Signal Strength"
@@joesmith-je3tq yeah
@@alphaindustries5775 Transformer coupled, diode to rectify the signal, cap for filtering, trim pot to set the sensitivity and a meter. Because I am really only looking for a relative measurement in a very narrow range, the circuit can be pretty crude.
Looks similar to my homebuilt CB radio receiving crystal radio which tunes to 8 to 30 MHz
Where can I find those input covers on the bryman?
Where can I find those covers for the inputs on the Brymen?
Where can I find those dust covers for the banana inputs?
Buena noche disculpe puede compartir el manual de multímetro por favor plis
I would need to scan it. Guessing the manufacture has it on their website.
Salam UNI-T 61B+ multimetrəni test etsəniz sevinərəm
Totally correct, what level you consider ‘safe’ depends on the application, less than 40 micro Joules under two rare malfunctions including the most onerous expected malfunctions will be safe for zone 0 hydrogen application per IEC 60079-11. Thanks for your video.
Great work, most enjoyable
Uni-T have upped their game a bit with the new meters, I still personally wouldn't use the vast majority of their meters for anything else than bench use or CAT II circuits (in a pinch) like a common wall socket, but it's nice to see.
Awesome video Joe! If you haven't already check out the book called "200 meters and down" it's a fun read about early radio. Thanks for sharing.