Figure 1 is a sample circuit which can be configured to measure the applied voltage and current draw of a capacitor. Before applying any voltage to a capacitor, always test it for any shorts.

The circuit shown here tackles ESL/ESR measurement of capacitors by using a mercury-wetted relay (Fig. 1). In this circuit, the relay is employed as a fast closing switch.

Measurement of circuit's attenuation factor and generator's internal resistance leads to r c, the capacitor's ESR: Instead of using a sine wave excitation, we can use a square wave.

Figure 1 This simple fixture first impresses a reference voltage across a capacitor under test and then measures the voltage drop versus time at the output of the voltage follower (a). The circuit ...

Engineers usually have access to signal and function generators, as well as frequency counters and oscilloscopes, but they may not have access to capacitance or inductance meters. Using the test setup ...

Longtime contributor Bob Meister from Hamden, Conn., writes in response to Tom Osenkowsky’s recent contribution with respect to equivalent series resistance (ESR) and the Sencore LC-75 Z-Meter being ...

Q. What is the minimum ampacity and minimum size conductor required for a circuit that connects a capacitor to the terminals of a 25 hp, 460VAC, 3-phase, air conditioner induction motor? The rated ...

So, impedance analyzers are used as described below: Characterize circuit blocks: Each major circuit block’s impedance behavior when integrated is modeled based on measurements from impedance ...