I need a tool to measure low ESR caps 2000-3000uF. They can have ESR at about 0.01Ohm and even lower.
As I see,
APPA 703 is not an option here, couse of
±0.5%+15D accuracy with 0.001Ohm resolution in lowest 20Ohm range.
BK 879B looks good with
±2.0%+2D and 0.0001Ohm resolition.
Tonghui TH2822C at first sight looks even better with
±1.00%+3D and 0.0001Ohm resolition.
But I notice in the
specs, that it's lowest 4Ohm range starts from 0.4000Ohm
p.s update: found another
specs on the Tonghui website and magically there is 0.4Ohm range starting from 0 with ±3.00%+5D accuracy. Not as good as BK, but still good enough.
Asking the owners of the Tonghui, is it true that it cannot go below 0.4000Ohm readings with resistanse and ESR?Asking the owners of the Tonghui and BK, do this LCR meters measure ESR on LowESR caps (0.05-0.01Ohm ESR) correctly and stable?