Products > Test Equipment
LCR meter reccomendations, mostly for measuring ESR on e-caps
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TimFox:
The price of the DE-5000 is very good for a unit with its performance.
This is due to the use of a dedicated chipset, the Cyrustek ES51919, which I believe emulates the measurement of the old G-R "Digibridge".
My only regret is that it will not display magnitude and phase of impedance, which I believe is a matter of firmware.
One can build ones own test fixture, with true 4-terminal connections, by starting with a TL-21 probe and re-wiring it for different connectors.
Notes:
1.  The guts are "floating" with respect to a common terminal, brought out as guard.  Since the unit is battery-powered, placing it on a plastic box allows measurement of circuits that are grounded (watch out for charged capacitors or powered circuits).
2.  The "calibration" of this and similar units is not calibration of the ohms or farads, since that is due to an internal precision resistor, but a computational correction for the test fixture in use.  Even using the panel connectors directly, one should always calibrate the unit after power on with open and short circuits.
3.  Since I have to calibrate it anyway, I never minded having the unit not remember the previous setting.
4.  The test voltage amplitude is fixed (no user control) at roughly 600 mV rms.
RiRaRi:
Thanks. So to sum up. Is there any difference in these more expensive and DER DEE5000 in terms of testing old electrolytic capacitors? Why would someone choose something more expensive LCR for this usage?
tautech:

--- Quote from: RiRaRi on August 08, 2023, 11:36:19 pm ---Thanks. So to sum up. Is there any difference in these more expensive and DER DEE5000 in terms of testing old electrolytic capacitors? Why would someone choose something more expensive LCR for this usage?

--- End quote ---
Convenience and indicative accuracy are the real requirement IMO which is why I suggested smart tweezers in the 1st reply that also cover you for SMD work.
RiRaRi:
I understand. But in my opinion der de 5000 is more convenient since you can use it with multiple probes also tweezers. Also it has 100 khz option which is the best for testing the majority of elecrolytic caps. Would you agree and does this tweezers has something that i am not aware of?
pdenisowski:

--- Quote from: RiRaRi on August 08, 2023, 11:36:19 pm ---Thanks. So to sum up. Is there any difference in these more expensive and DER DEE5000 in terms of testing old electrolytic capacitors? Why would someone choose something more expensive LCR for this usage?

--- End quote ---

Honestly, for "hobbyist" purposes the DE-5000 should work just fine. 

I have access to my company's high-end LCR meter (the LCX), but when I just need to test a cap, I usually pull out my DE-5000.  I also have a Tenma handheld that is quite sufficient for "hobbyist" use as well, but I prefer the DE-5000.
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