What is capacitance?
Capacitance is the ability of a body to store an electrical charge. A material with a large capacitance holds more electric charge at a given voltage than one with low capacitance.
A capacitance meter reads in units of measure called farads or symbol F. Trouble shooting electrical shorts or drop offs in probe wiring is usually measured in picofarads or pF … that’s a trillioniths of a Farad! Very small stuff!
A capacitance meter is helpful in narrowing down the location of a short or wire break. If you find a large variation of measurement on one specific wire, you can probably assume you have an issue somewhere on that wire. First Call can also tell us this, but a capacitance meter can get even more specific. A short, for instance, will have a higher capacitance and a disconnect can have a zero reading.
By measuring the capacitance of a faulty wire at various places, we can pretty much determine the exact location of the damage, thus helping determine the correct course of action to take in our electrical repair.