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Rob C
2024-11-18 14:40:49
I've had two of these ET4410s now and both were completely innacurate testing capacitors above 100uF or so (manufacturer claims it can measure up to 100,000uF). Always reading low, far more than the stated 2% rating compared to several more reliable testers. I got variances on these ET4410s ***over 10%*** error. This is not 10% from nominal, this is 10% from readings from much more reliable meters.The ESR and Q readings were highly suspect, varying by over a factor of 100 from more reliable meters (other meters read within 1% of each other) with similar test frequencies. While other meters gave readings of .02 ohms, these ET4410s both read as high as 1 to 2.5 ohms!As this same issue was essentially the same on both units, I have to conclude that it is a common failure to this design.If you need a meter for testing larger caps for power supplies etc, this is NOT the meter for you
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