Capacitance and resistance meters are used to test electronic components and repair or troubleshoot electrical equipment. Commonly used in appliance repair, a capacitance meter tests a capacitor to ensure it can store and release an electrical charge properly within a circuit. An insulation resistance meter is used to verify that electrical wiring is in working condition and that the insulation is not worn or damaged. A ground resistance meter confirms that electrical equipment and systems are properly grounded for safety. For measuring impedance, an LCR meter measures inductance, capacitance, and resistance of electronic components and electrical equipment.