How to test capacitive impedance

Capacitor impedance can be tested with a bridge. It is extremely simple to use, use the two clamps of the bridge tester to hold the two pins of the capacitor (even for electrolytic capacitors, there is no need to distinguish between positive and negative poles), and then read the number of signals.

Note that bridges are usually available in 100Hz and 1kHz frequencies. Impedance is frequency-dependent and is measured differently in different gears.

Impedance:

Z= R+i( ωL-1/(ωC))

Description: The load is a complex of three types of resistance, inductive inductance, and capacitive reactance of capacitors, collectively referred to as the "impedance" after the composite, which is written as a mathematical formula: Impedance Z= R+i (ωL-1/(ωC)). Where R is the resistance, ωL is the inductive reactance, 1 / (ωC) for the capacitive reactance.

(1) If (ωL-1/ωC) > 0, it is called "inductive load";

(2) Conversely, if (ωL-1/ωC) < 0, it is called "capacitive load". load".