Hugo Holden
Veteran Member
Well in the UK the gold standard is the "Peak" which measures at 100Khz
https://www.peakelec.co.uk/acatalog/esr70-capacitor-esr-meter.html
but I think you will think its too expensive.....
One interesting thing is that in use, a capacitor in an SMPS, operating at 100kHz, experiences a rise time on the leading waveform edges of up to 23 times that frequency, because the 100kHz is a square wave in an SMPS, not a sine wave and the odd harmonics create the rising edge. So the only realistic way to assess the capacitor is with a square wave pulse, with a fast rise, which is the way the Bob Parker meter does it. The 100kHz sine wave method is nowhere near as good as the fast rise pulse method, so I would not regard the Atlas Peak meter as "Gold Standard", not even close.