Products > Test Equipment
Best ESR meter for in-circuit (even if it is not accurate)
armandine2:
I watched Mr Carlson's Yaesu power supply repair video, last night - here he makes use of his ESR tweezers.
[edited to add link]
https://www.lcr-reader.com/
HalFoster:
@Shock-
+1 for this reply - while I have lab quality LCR meters (WK 6425, GW LCR6100) that are easily capable of in circuit measurements, the small hand held model is what I use to do initial checks. Much easier to use quickly and, as pointed out, less risk if something goes wrong (what, those line filter caps *weren't* discharged?). Of course keep in mind that they usually only test for ESR and C at limited frequencies and can easily miss a capacitor that is completely shot as far as the requirements of the circuit goes.
Hal
Shock:
You don't necessarily need to own a tweezer tool to get the benefit of one (I've already been down this path). If your esr/lcr meter is socketed you can buy plain tweezer test leads (in 2 and 4 wire). Easy to then swap between probes, tweezers, alligator/croc clips, smd or through hole fixtures for measurements (as the usage case arises).
Edit:
Hal, I'll often start with a capacitor discharge (resistive discharge probe), check voltages, then dc resistance check and then capacitance. Unless my gut tells me otherwise after I've done esr I'll move back to the symptom, but I acknowledge theres a handful more failure modes.
Shock:
Had to laugh at Carlsons discharger in that video, it's huge. Reminded me tweezers also don't play well with conformal coating and residues/oxidation. My guess was the resistor, was a good video.
RiRaRi:
--- Quote --- Of course keep in mind that they usually only test for ESR and C at limited frequencies and can easily miss a capacitor that is completely shot as far as the requirements of the circuit goes.
--- End quote ---
Would you mind explaining this a little more? thanks
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