The best way to remove these caps is to twist left and right and off they come. Been doing it for years..you will be happy you did so. Try it out on a scrap board and you will see. Good luck .....
Great tutorial. You can also test the resistance or microhenries of the inductors with the esr meter. The reactance formula is 2𝛑FL. That would be 2 x 3.14 x frequency of esr meter which is 100 kHz x 100 (uH) Just plug it in to get the reading. R=0.628 X L(uH) L(uH)=R(ohms)/0.628
As I am now 78 Now I have slight tremor I have made up really sharp probes insulated right to the points so no risk of slippage or short risks! Fraser.
Should you have say a 100 R resistor to short the capacitor because back EMF could damage sensitive components connected to the capacitor? Shorting large capacitors out of circuit apparently can damage large electrolyte types as well I have read?
I have one of these meters correct e if I am wrong but I am sure you can use the test leads anyway round. Thanks for your patience must be difficult try to form using them leads even the sockets are a bit loose on plugs.
I think you could improve your content if you would script your videos - at least in outline form - and perhaps rehearse at lest the ‘fiddly’ parts. This might help to improve the flow of information, and reduce the time involved. The information is solid.
Actually you can use longer leads to trace bad/suspicious caps. Once you suspect a cap being bad you can still take it out and check it. Been doing that for years, never had problems finding bad caps that way.
A multimeter feeds a small voltage through the resistor and uses the voltage drop to determine the resistance. A functioning capacitor is an open circuit and no voltage will flow after the initial charging phase.
Those ESR meters only send a small pulse while a normal multimeter will feed a constant voltage which will charge the capacitor and give "OL" as a result. When using a regular multimeter, once the cap is charged (happens very quick) there will be no more current flowing and as a result the meter will "see" an infinite resistance.
The best way to remove these caps is to twist left and right and off they come. Been doing it for years..you will be happy you did so. Try it out on a scrap board and you will see. Good luck .....
Great tutorial. You can also test the resistance or microhenries of the inductors with the esr meter. The reactance formula is 2𝛑FL. That would be 2 x 3.14 x frequency of esr meter which is 100 kHz x 100 (uH) Just plug it in to get the reading.
R=0.628 X L(uH)
L(uH)=R(ohms)/0.628
Thanks for sharing that
1:07 Always "re-zero"....Period.
And why not sacrifice a pair of testleads to make a "pointy" pair of short testleads for this
Good tip on how to create probe extension for the clips.
As I am now 78 Now I have slight tremor I have made up really sharp probes insulated right to the points so no risk of slippage or short risks! Fraser.
25:24 This is how you lift pads. Don't apply that much force, be patient and wait the solder to melt.
Should you have say a 100 R resistor to short the capacitor because back EMF could damage sensitive components connected to the capacitor? Shorting large capacitors out of circuit apparently can damage large electrolyte types as well I have read?
25:30 don't push..risk of lifting pads, just heat up enough...also, tape of surrounding area to protect from blowing off....😉
I have one of these meters correct e if I am wrong but I am sure you can use the test leads anyway round. Thanks for your patience must be difficult try to form using them leads even the sockets are a bit loose on plugs.
You are correct
Have you tried connecting regular long test leads from a multimeter to the ESR meter?
I am planning to make a video showing the impact of different types of leads.
I think you could improve your content if you would script your videos - at least in outline form - and perhaps rehearse at lest the ‘fiddly’ parts. This might help to improve the flow of information, and reduce the time involved. The information is solid.
Thanks for your feedback
I like your videos
Don't You think that holding probes with your bare hands would afect readings?
11:24 No
Did the amp work after changing the caps?
If a piece of equipment is of high quality and morth money i dont even check capacitors, i just change the horrible things.
But can you be positively sure the new caps will have the same longevity of the originals? I don't think the quality is the same with many products.
Hi bro can I get those two meter to buy ?? Watching from Jamaica west Indies !!
Try AliExpress or Banggood and search for MESR-100
Why cant you use longer lead ? Cant you zero those longer leads?
The leads are deliberately short in order to limit the amount / possibility of inductance between the leads that would affect the the measurement
@@jtechlabs6037 Thx. I didn't know about "inductance" problem. Would make good video
Actually you can use longer leads to trace bad/suspicious caps.
Once you suspect a cap being bad you can still take it out and check it.
Been doing that for years, never had problems finding bad caps that way.
Correct, meter will not zero, you get a message saying "leads to long".
You might as well use longer leads since you are putting your thumbs on these new "probes" every test LOL
Thanks for your feedback. I have been reworking these to improve the insulation. The real issue is getting into the component
@@jtechlabs6037 Just use longer leads and "zero" them.
Or use thicker leads
What if you have an electrolytic capacitor rated @ 220uf @ 400v? What would the resistance be?
.24 ohm or lower. You can find ESR tables for the capacitance/voltage on the web.
19:03 Common just use your multi meter test leads it’ll be easier for you man
Why could you not use a regular multimeter to determine the resistance of the capacitor? It seems to work just as well. Please explain.
A multimeter feeds a small voltage through the resistor and uses the voltage drop to determine the resistance. A functioning capacitor is an open circuit and no voltage will flow after the initial charging phase.
The meter is measuring the capacitive impedance to the high frequency thru the capacitor, not the D.C. resistance .
Those ESR meters only send a small pulse while a normal multimeter will feed a constant voltage which will charge the capacitor and give "OL" as a result.
When using a regular multimeter, once the cap is charged (happens very quick) there will be no more current flowing and as a result the meter will "see" an infinite resistance.
Using hot air in these caps is possible to make them explode lol. The use of eye protection should be used lol.