An LCR meter is used to measure ______.

SOLUTION

LCR meter:

• An LCR meter is electronic test equipment used to measure the inductance (L), capacitance (C), and resistance (R) of an electronic component.
• It actually measures impedance internally and converted for a display to the corresponding capacitance or inductance value.
• It gives accurate readings if the inductor or capacitor device under test does not have a significant resistive component of impedance.
• An LCR meter can also be used to measure the inductance variation with respect to the rotor position in permanent magnet machines.

Operation:

Generally, the device under test is subjected to an AC voltage source. The meter measures the voltage across and the current through the device under test. From the ratio of these the meter can determine the magnitude of the impedance. The phase angle between the voltage and current is also measured in more advanced instruments, in combination with the impedance the equivalent capacitance or inductance, and resistance of the device under test can be calculated and displayed.

Important points:

• The automatic bridge balance method is is a circuit design that is used in the LCR meter.
• These can be easily operated, it can measure passive components with minimal error.
• By the use of an LCR meter, we can also measure parameters like dissipation factor, quality factor, conductance, susceptance.