Note the initial voltage reading in the voltmeter.You can use a digital or analog multimeter while selecting the DC voltage range for the same purpose. Set the value of voltmeter to the DC voltage and connect the Capacitor to the voltmeter by connecting the positive wire of the battery to the positive lead of the capacitor and negative to negative.If you are not sure or unable to find the proper leads, here is the tutorial on how to find the negative and positive terminal of a capacitor. Make sure to connect the positive (red) lead of the voltage source to the positive lead (long) of the capacitor and negative to negative. If the value of battery voltage is greater than the nominal voltage of the capacitor, it will damage or burst the capacitor.) voltage. Now charge this capacitor for a few second to the rated (not to the exact value but less than that i.e.Check the capacitor voltage rating printed on it (As shown in our below example where the voltage = 16V).Make sure to disconnect a single lead (no worries if Positive (long) or negative (short)) of the capacitor from circuit (You may fully disconnect as well if needed).If you read a significantly lower capacitance or none at all, then the capacitor is dead and you should change it with a new one for proper operation.Īlso, you can use the DC Voltage “V” or Volt Mode in the digital or analog multimeter to perform this test.(Note that the reading may be less than the actual value of the capacitor (the rated value of capacitor due to the tolerance in ☑0 or ☒0 ). Then the capacitor is in good condition.the printed value on the Capacitor container box). If the reading is near to the actual value of the capacitor (i.e.Now connect the capacitor terminal to the multimeter leads.(Red to Positive and Black to Negative).Now Select Capacitance “C” on the multimeter.Remove the capacitors from the circuit board.Make sure the capacitor is fully discharged.To do this, rotate the knob of the multimeter to the capacitance mode and follow the following basic instructions. The function of capacitance mode in a multimeter can also be used to test the tiny capacitors. Note: Testing a capacitor in the capacitance mode can only be performed if the analog or digital multimeter has the farad “Farad” of Capacitance “C” features. It means that the capacitor is in good condition.Ĭhecking Capacitor using Multimeter in the Capacitance Mode Good Capacitors: Initially, it will show low resistance, and then gradually increases toward the infinite.Open Capacitors: An Open Capacitor will not show any movement (Deflection) on the OHM meter scale.Short Capacitors: Shorted Capacitor will show very low resistance.Note the reading and compare with the following results.(COM to the “-Ve” and Positive to the “+Ve) terminals). Connect the Meter leads to the capacitor terminals.Rotate the knob on the analog meter to select the resistance “OHM” mode (Always, select the higher range of Ohms).Make sure the suspected capacitor is fully discharged.
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