Esr Meter MESR100 v2 Hands on look at a low priced Equivalent series resistance meter.
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- เผยแพร่เมื่อ 2 ส.ค. 2024
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In this video we will have a look at the MESR100 esr meter from MIB Instruments,We will have a look at the insides and test some components.
For the price as an entry level esr meter i would recommend it the test leeds a bit short for in circuit testing But its a great little meter.
Features:
JINGYAN MESR-100 V2 Auto-ranging capacitor ESR and Low Ohm Meter
Measuring range from 0.001 to 100.0R, support IN CIRCUIT Testing.
Using true 100 KHz sine wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer.
What is ESR of capacitor?
There is a series resistor inside a capacitor, by using 100kHz to remove the impedance 1/(2*pi*F*C), the impedance will become small, and we can then measure the true series resistor value.
A bad E-capacitor will have a larger ESR and create a large ripple rather than filtering noise. Normally, a bad capacitor is larger than 3 ohm.
Using this theory, we can measure to see if the capacitor is bad/ damaged or in good condition.
Because this ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result it can be use as an in circuit tester as the low testing voltage will not turn on the semiconductor inside a circuit under test.
Specification:
1) Accuracy: Up to 1%
Wide Measurement Range: 1uF (for 0.1uF the error will be larger on equation 1/(2*pi*F*C) @ 100Khz )
2) High Resolution: 4 digit, or 0.001Ohm @ 1 Ohm range
3) Measuring voltage: 40mV RMS (TESTING VOLTAGE)
4) Clamping voltage: 0.15V (open voltage)
5) Battery 2X AA 1.5V battery
6) External Power: 5V micro USB
7) Operating current 0.02A
8) Battery Life time: 80 Hours
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Thanks Bri, yep i like the Bob Parker Blue esr i am thinking of get the kit and building one, Thanks For Watching.
Thanks for the feedback, duly noted and acknowledged.Thanks for watching.
Love the Esr Meter....
Nice video Daz, I have got the PEAK ESR70 and I got another one which is Blue ESR Capacitor Tester. they come in very handy.
Hi Patrick,No i never did test it on a scope,i will when i get the opportunity and let you know what waveform we get.
Thanks,
Very useful illustration.
Thanks Tim, For The Price its a great Bit of kit.
The will be some repairs coming up in the future where the esr meter will be used this was just a look at the insides and test some components to see how well it worked.Thanks for the suggestion.
Previously a capacitor popped and leaked due to cheap capacitors. It is not an issue how they popped and swelled and had their ESR increase. Just that they have a 105 C. temperature on them and maybe a 5000 expected life. A ESR meter tests under AC current instead of DC for their impedence. My electronics book does not have ESR and needs an addendum. Previously I could not recall from memory any ESR term.
Do you find the plug in feature at the front gives you different readings for same capacitor as when you use alligator clamps ( both tests same capacitor out of circuit) let me know plz.. My unit must be defective
Cheers Tel.
very helpful thank you.
Your welcome, Thanks for watching.
Just received mine today. Arrived quickly but a little scratched up. I believe it might have been used or returned for refund. It wouldn't zero at first, and noticed when I flexed the case, the readings changed. I unscrewed the case, put it back together, and now it seems to work fine. I recommend buying a better one if you can afford it. Otherwise, I tested a bunch of old caps, and I'm pretty satisfied. Haven't done extensive testing with it yet. But overall a good deal, if you are on a tight budget like me.
can you drag it out again and run it over a full circuit with decent size caps?
Hi Retsu Ichijouji, no you can only change the ohm range 0 to 1, 1 to 10, 10 to 100 or auto range. Hope this helps.
Can it be use in smd capacitors ?
Thanks
Seems to work ok.
I just received my MESR-100. My unit "tested" two obviously bad "in circuit" electrolytics as having a low ESR. I removed each cap and tested them again and the MESR-100 indicated that each cap had a high ESR.
Unless I'm missing something, the MESR-100 is of little use in testing in circuit capacitors.
There will always be 2 readings: in circuit & out of circuit reading. The chart attached to the meter refers to in circuit reading. Now, if you google ESR Chart you will see other charts with a specific uf & voltage that are higher in value than the one chart attach to the meter. That refers to out of circuit reading electrolytic capacitor.
hows the IN CIRCUIT ESR measurement ?
just got mine today but all the caps I'm changing are far above 250v and the chart stops at 250v :/ is there an apendix online somewhere you can point me at? thx!!
This link may help www.eevblog.com/forum/beginners/esr-values-for-electrolytic-caps/
does it work with smd capacitors?
would have liked to see more in circuit testing......
What if you want to measure a capacitor that falls outside the given ESR table? For example, I have a 400volt 80 Farad capacitor in circuit. How would I test that one to make sure it is good using the MESR-100? Or, can it be done at all using this meter?
I suppose you'd need to crawl the internet for specs for capacitors that aren't inluded in the sticker
Great Video. Can this be used for in circuit measurement of very small surface mount capacitors on an iphone for example? I would like to see if this could be used to find which Capacitor is faulty on a line.
the leads arent the best
Daz can you recommend a multimeter ?
great
if you test a good 25vcap it says it says good cap with lo esr and if it was not in range it says good if c is less than xxuf,then you would refer to a table to cross check it the same goes for other voltages if it is a good cap,50v say,it will display good if c lower than xuf if the cap is the same uf or lower there is a good chance its good if the uf is higher than displayed it is bad it is always a good practice to cross check and if in doubt test a known good cap of the same voltage and uf
How would I measure a 1000uf 6.3v capacitor with this meter in circuit, if the meter only ranges from 10v to 250v on the chart?
as you can see on the chart on the 1000uf row the resistance decreases when the volt is higher so even if you dont have that exact value on the chart you know it should be a little higher than 0.12, let's say 0.2 it will be a good guessing, so if it give you a 0.5 or more, that capacitor is bad as hell
Thanks For watching.
Friends, this fault occurs when measuring a capacitor without having downloaded it before, inside it has a protection diode D1, short and give this message, replace it and fix the tester, read the user manual
So you didn't discharge the capacitor you were testing and blew a diode in the tester?
Only expensive professional level testers have adequate protection - multi-meters included - e.g. use multi-meter on wrong range and test volts = destroyed meter unless you paid a lot of money for it
Friend, if I repair it, thank god it can be repaired and I do not throw it in the trash, I hope this comment solves problems fururos to others like me that do not download the trainer before, greetings from venezuela.
I'm glad you fixed it
We hear about the problems in Venezuela - hope everything works out OK in your country
Can you review the bigger brother of this meter MLC500. Also when you doing so, can you also explain why should I buy this meter or the MLC500?
Love your video, I'm a subscriber now. Thanks!
If some one sends me one I will happily review it. I will have a look on my next eBay buying spree.Thanks for the subscription.
Thanks! I'm in Czech Republic now, my twin brother died, so it will be some time before I'll return to USA. But I'll keep your channel on my favorite's list. I'm disappointed that there aren't good video's about the meter and no good manual that explains how the meter works inside, so I know it's advantages and limitations...
thanks sir🙏
welcome
Hi sir, your video is very educational.Many thanks for uploading. But at the same time, I have a question, I now have a multimeter with capacitor test option(Aneng 9002), I am not yet a professional electronics technician, do I really need this esr meter?
yes
It is good for basic repair; however, because this is an 100 kHz meter. That does not replace the expensive LCR. If you were serious work with a lot of SMD/Through hole or 1 pF to 1000 uF, I would get better LCR meter from Keysight with 100 Hz to 100kHz and guard banana probe which is 400 dollar.
With this tester you can measure peak-faradian scales
It would have made it interesting to replace the cap and tried that video card.
amigos, esta falla da cuando se mide un capacitador sin haberlo descargado antes, adentro tiene un diodo de protección D1, entra en corto y da este mensaje, reemplazenlo y se arregla el tester, lean el manual de usuario
Hola cual es el mensaje q sale?
Can it measure its own capacitor correctly when it fails and gives bad readings? :P
+fixitdaz hiim want to buy one.. and then I saw this.. is that a better? it will do additionally things that the 100's don't?www.ebay.com/itm/MLC500-AutoRanging-LC-Meter-MESR100-In-Circuit-ESR-Capacitor-Meter-Tester/131676510059?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003132420%26meid%3D7efa4eaf5c2b4a78a9886d056f3886dd%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D221933749271
Dear Sir ,
I have already bought this unit You are indicating.
Is it possible to lenghten the probes' wires, so as to " work" with increase ease of posture ?
I have tried , but tester measurements are not perceived in the right way :Please: my I ask You what to do , in order to maybe ? change the resistance value of the cable iself? I.e. change some inner part of the tester ?
Best Regards
georgiowee Hi. You need to use silicon cable which has a super low internal resistance and you can lenghten it to your heart's content. Then, get yourself a pair of crocodile clips and a pair of banana jacks. Solder the wires and away you go. That's how I always make my own test cable that I can rely on. Also, these ESR meters are very forgiving on what cable you use as long as their internal resistance doesn't vary when you move them. Hope this helps. Cheers :)
ciprianwiner oh well: thank You for Your interesting answer . I am now transcribing Your advice, in order to remember how to repair arrange and solder those new kind of cables in the next futureBest Regards
georgiowee Hope it turns out well. If you need any advice, just ask. Cheers :)
+georgiowee What if you connect the test leads together and press the Zero button? It should adjust for different resistance cables. But you would need to press the Zero button every time you turn on the meter.
could SOME ONE PLEASE tell me what are the values we are looking for using this exact meter. Because I tested like 1000 Capacitors with it, and honestly different brands like samsung read different from rubicons or blu or green ones. I mean like 1. up or down? NOW what if you have a small capacitor 470uf 16volts BUT then YOU also have THE SAME SIZED 470uf Capacitor 35Volts. Going by their chart on the Unit, I would have to throw away 95% of my capacitors. Which i think is as little hard to believe since if i measure the UF, well a 1000uf if its exactly 1000 I save it, if its off by 6% I throw it away. So if One meter is telling the UF is correct, why does this Yellow thing tell me its crap, its all crap according to this meter. And why does it say, good if 470 uf, on 1000uf capacitors? AND YES its Zerod I even took off the leads and use the pin connector. Can someone please let me know how to use this. Mine came with 1 page of china shapes, that i just cant seem to translate into words. The characters look to similar to me + add font and forget it. So of anyone can answer why they all read different, if the same value & Size but diff Co. Or if Diff Size Same UF Same Co. I owned it for months but i find no viable pieces of information from this POS-100 so does anyone know what you look for when doing a test with this?
you may fined this usefull conradhoffman.com/capchecktut.htm
That is really helpful, im still reading it, but I just wanted to say thanks alot! Finailly something that addresses the different sizes same voltage.
Peter Kiryluk Glad it helped the only way is to pull up the data sheet for the manufacturers and see what esr value is for that particular cap. see example @ goo.gl/qCv3nR
I measured several good caps and then made up a chart and attached it to the backside of my meter so I know what to expect when testing them.
Hey do you mind sending me that list? For this meter, the problem for me, (i could not do that) Because I use parts i pull off other Tvs and stuff, so i measure the UF and i only use the ones who are within 10%. I dont have new capacitors and especially because there is like 100 different values. Then each cap is different in size, like 470 can be a tiny 25V or it could be a huge 25V. Back when RCA was a company who invented the TV, they made the sizes the size because they wanted it to work for ever, what i see today in stuff is retarded. Manufactures are not only hanging the board sideways on a HDTV but they still put the caps in sideways too, so the electrolytic fluid pools on one side, snd they use undersized capacitors, like the tiny 470 Uf 35V that are like a half a inch are garbage, all of them. So if you could send me your list (because i never have new capacitors) so i dont even know what it was made to be from the start. Like a Rubicon which is 1000uf most always read 1100UF (from the newest 2013 TV sets, and yet other makes like KMZ make their caps to be 1005 like exact. Then when i get large 150Uf 400V caps, they always read 138uf (most) once in a wile ill find one that is 145uf. Anyway my Email si PeteKiryluk@gmail.com if you could send me a copy just so i can get a hangle on what it should be i would really appreciate it.
C00L tool.
too bad you can't use longer test leads with these.
@PHILL DIXON Nope, I tried 2 sets of longer leads and it refused to zero showing error. If leads have too much resistance then meter doesn't zero
The accuracy on the screen it's not correct. Because the meter can not tell the cap specifications. Better check the list
always best to compare with the manufacturer's data sheet .
I got it yesterday.. and its absolutely rubish. Forget testing in circuit.. it shows different values every time. Also make it to zero is so difficult. Not worth that price..
IT DOES its not only me, every damn capacitor Same Value Difference in Size of Same Size different Co. ALL Read Different I would have to throw away 95% of all capacitors i come in contact with.
You are using the meter incorrectly. Eg, when you tested the cap (18mf 385v) the readout said the test applied to caps of 25v..
a little forewarning to anyone interested in buying this meter: as I just discovered the hard way, this device has no input protection whatsoever, what that means is the slightest charge left in a capacitor will fry it, there's no excuse for that, that's terrible design, and good luck getting a refund or exchange from your seller passed the 45 days paypal protection, mine turned a deaf ear to my requests, I'm going to buy something more reliable
Nice tester but they are all bloody cheaply made coming from china.
It does the job, but some are in cheap cases and crappy soldering, the one I got is pretty good inside but in a cheap plastic case. you are better of sometimes getting it as a kit and building it yourself at least you know its ok inside.Thanks for watching
DONT BUY THIS METER! ITS JUNK! SPEND THE EXTRA $25 FOR A "BLUE" METER
You just glibly glossed over all capacitors except electrolytic. Does this only work for electrolytic caps ? I know the chart refers to electrolytic caps, but does it give an in circuit value for ceramics, tantalums, etc ?
Your review was not thoughtful, and was little better than reading the instructions.