After a large number of capacitor measurements can be seen, genuine capacitors in normal operating conditions, the leakage current is very small Capacitors in the rated DC voltage work, the current flowing through the capacitor that is the leakage current of the capacitor. Connected in accordance with the following circuit, select the current limiting resistor for 5kΩ, each measurement, adjust the power supply output voltage equal to the rated voltage of the capacitor, the multimeter adjusted to a larger current file (10mA or more), the first capacitor is fully charged, and then the multimeter and then adjusted to the appropriate small current file for measurement, the measured leakage current is shown in the table below. Quote