How to Test Capacitor(Find Bad Capacitor)

Introduction:

Capacitor is a passive components. it is a two terminal device. capacitor special is their ability to store energy. common application include local energy storage (temporary storage), voltage spike suppression and complex signal filtering.
Not all capacitors are created equal. Each capacitor is built to have a specific amount of capacitance. The capacitance of a capacitor tells you how much charge it can store, more capacitance means more capacity to store charge. The standard unit of capacitance is called the farad, which is abbreviated F

method #1: Using Capacitance Mode in Multimeter

First turn ON digital multimeter and select capacitance mode.
Connect the test leads to the capacitor terminals. Keep test leads connected for a few seconds to allow the multimeter to automatically select the proper range.
Read the measurement displayed. If the capacitance value is within the measurement range, the multimeter will display the capacitor’s value.
displayed multimeter value is accurate or near value, the capacitor is good
the capacitance value is not display or is not change any value, the capacitor is bad

method #2: Using DC Voltage Mode in Multimeter

First turn ON digital multimeter and select DC Voltage mode.
give some voltage to capacitor through power supply(V+ to capacitor positive pin, V- to capacitor negative pin). and suddenly remove capacitor from power supply.
Connect the test leads to the capacitor terminals. Keep test leads connected for a few seconds to allow the multimeter to automatically select the proper range.
Read the measurement voltage is displayed.then, the voltage is reduced from maximum voltage. after few seconds the voltage is 0 from maximum voltage.
displayed multimeter value is reduced 0 from maximum voltage, the capacitor is good
displayed multimeter value is not reduced 0 from maximum voltage, the capacitor is bad

method #3:

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