What quantities does an LCR meter measure?

What quantities does an LCR meter measure?

• A. Inductance
• B. Capacitance
• C. Resistance
• D. Inductance, Capacitance, and Resistance

Answer: (D)

An LCR meter is built to determine the values of passive components by testing their response to a small AC signal. It applies a test current or voltage at a chosen frequency and measures the impedance and the phase angle. Since inductors, capacitors, and resistors behave differently with frequency—an inductor’s impedance grows with frequency, a capacitor’s impedance falls, and a resistor stays the same—the meter uses those measurements to compute inductance, capacitance, and resistance. In practice you get readings for L and C, and a resistance value that often represents the component’s loss or ESR/ESL at the test frequency. That combination is why the meter reports all three quantities.

An LCR meter is built to determine the values of passive components by testing their response to a small AC signal. It applies a test current or voltage at a chosen frequency and measures the impedance and the phase angle. Since inductors, capacitors, and resistors behave differently with frequency—an inductor’s impedance grows with frequency, a capacitor’s impedance falls, and a resistor stays the same—the meter uses those measurements to compute inductance, capacitance, and resistance. In practice you get readings for L and C, and a resistance value that often represents the component’s loss or ESR/ESL at the test frequency. That combination is why the meter reports all three quantities.