Among the most useful of all electronic components is the Capacitor. The term capacitance refers to the ability of a capacitor to store charge. It’s also the measurement used to indicate how much energy a particular capacitor can store. The more capacitance a capacitor has, the more charge it can store.
The ability of a capacitor to accumulate an electrical charge is termed its capacitance, and it is this value that is measured by a capacitance meter. The simplest method of measurement is to apply an electrical current to a discharged capacitor, and to then measure the rate at which the voltage in the capacitor changes. With a known input, this process can be used to determine the capacitance of relatively large capacitors with a small test current.