Big capacitors measurement(LCR meter related)
Very large electrolytic capacitors are generally used at relatively low frequencies (below 1 kHz) to smooth fluctuating DC voltages such as in power supplies.  At 100 kHz, the impedance of an 8200 uF capacitor is less then 1 milliohm. This is very difficult to measure accurately considering wire resistance and the effect of parasitic capacitance and inductance that are inherent in the construction of the capacitor and have significant impedances at 100 kHz. This is why the capacitance of electrolytic capacitors is usually specified at either 60 Hz, 120 Hz or 1000 Hz. It is also why electrolytic capacitors used as bypasses on high speed IC's are almost always placed in parallel with a much smaller capacitor that is more effective at high frequencies.