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Capacitance in Probe Repair

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.