Electronics > Projects, Designs, and Technical Stuff

ESR meter

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tigr:
I chose here such a precision microammeter for the circuit. ;)

Lassivv:

--- Quote from: nanofrog on January 13, 2018, 01:50:14 pm ---
--- Quote from: Lassivv on January 12, 2018, 02:11:06 pm ---Just thinking what is best budget choice to measure ONLY esr. Not need that transistor, resistor, etc testers. Of course if you guys are that thinkings that price 8-15 transitors/resistor/capacitor/esr testers are accurate enough well i happy take links to good one :)

I thinking that just ESR meters are very much accurate and better reliable result, than that 8dollars cheap "multi" testers. Maybe i be just wrong.
--- End quote ---
In terms of reading ESR, a dedicated ESR meter is a better choice than a DMM. The main reason is a DMM can mislead you (i.e. make you think it's good when it isn't). They can usually test a wider range of values than a DMM as well. They're good for other things as well, such as measuring track resistance in order to find a fault.


--- Quote from: Lassivv on January 12, 2018, 02:11:06 pm ---Can be kit or ready. Price point is about 30-100dollars. And if possible europe shops are better because customs, taxes, postages etc :)

I know only Black one what Eevblog Dave use if i remember right something:  Dick Smith Electronics  but i think that not get anymore and price going with customs, taxes and postages quite high.
--- End quote ---
In the case of Dave's unit, his is a Silicon Chip model (latest).

Given that you're into repair projects, you might want to consider an LCR meter instead. And in the case of ESR, they usually offer multiple excitation frequencies. For example, if you need to test an electrolytic in a linear PSU, you can set the frequency to 100Hz (2 * mains frequency) in order to get accurate results for it's operating conditions. And they also test inductors and capacitors as well.  ;)

FWIW, the DER EE DE-5000 would fit your budget. And if you want it faster than the default method, the increase isn't that much IME. Kits with some test fixtures won't stretch your budget by much at all; say ~$20 over just the meter (example; includes the ground/guard wire, alligator clip fixture, and tweezer fixture).

These can also do 4-wire measurements. Lots of info here in EEVBlog, including teardown photos. Other stuff on YouTube as well. Excitation frequencies are 100Hz, 120Hz, 1kHz, 10kHz, and 100kHz.

If you'll note, the sellers linked are all in Japan and offer free shipping. What I've no clue to, is the customs, duties,... that your government would levy. Perhaps ask the seller to mark it as a gift to minimize/eliminate these fees?  :-//

For disclosure, I do own one of these as do a number of other members (info on great deals is very popular for some reason...  :P). Very nice bit of kit for the money IMHO.

In regard to Tigr's request of a unit sans transformer, the DER EE DE-5000 is such an animal, so you might want to add it to your short list for comparison.


--- Quote from: Lassivv on January 12, 2018, 02:11:06 pm ---This is only one what i finded: http://clientes.netvisao.pt/greenpal/evb1.htm

This looks quite good and get kit version too. Seems better than china clones on ebay, but anyone know is that ones ok?
--- End quote ---
It's the same as as the Silicon Chip ESR Mk.2 by Bob Parker linked above. The page you linked even states this is the case, and has a link to Bob's page.  :)

--- End quote ---

That DER EE DE-5000 seems good to my use. Little expensive what i thinking, but thats very good meter i think what i read.

Think to buy this:
https://www.ebay.com/itm/DER-EE-DE-5000-High-Accuracy-Handheld-LCR-Meter-w-TL-21-TL-22-TL-23-/282040803373?oid=161104294237

What you think is that good way to update that test alligator clips, that default alligators looks quite poor quality and so short wires. Checked this kind video and think if do that update with this Aliexpress alligator clips.



https://www.aliexpress.com/item/1-Set-4-BNC-TO-Alligator-clip-Kelvin-Clip-for-LCR-Meter-with-4-BNC-Test/32912179203.html?spm=2114

If not better LCR meters this price range not appear, i think i buy this DE-5000. Many thanks your hints/tips @nanofrog

kripton2035:
the TL-22 tweezers probes are very nice. I always use them. don't buy your deree-5000 without them.

Lassivv:
Thanks for tip kripton2035. I think then i buy that kit what i linked, that i think includes everything what i need.

Btw. Can i measure ESR caps when they are soldered on circuit. Like bob parker model i think you can measure esr caps when they are installed on circuit board and not need to desolder them to measure ESR.

kripton2035:

--- Quote ---Can i measure ESR caps when they are soldered on circuit. Like bob parker model i think you can measure esr caps when they are installed on circuit board and not need to desolder them to measure ESR.
--- End quote ---
yes this works fine. but it sometimes leads to wrong results (as it would with a dedicated in circuit esr meter because of parallels devices)
also on power supplies with big capacitor bank, you have to switch the frequency to 100 or 120Hz or the total capacity is too high for the meter.

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