Page 100 - Testing Electronic Components
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Testing electrolytic capacitor with digital capacitance meter
The second method to test capacitor is to use digital capacitance meter
and is a little more accurate compares to analogue multimeter. Connect
the test probe to the capacitor and read the result from the meter LCD
display. Example, a 100 microfarad should have the reading of
somewhere 90 microfarad to 120 microfarad. Remember, capacitors have
tolerance just like resistors.
Be sure to discharge capacitor first before testing. A reading of 60
microfarad means the capacitor has lost its capacitance and need to be
replaced. This meter is more expensive than analogue meter. Somehow
digital capacitance meter have its own disadvantage, which is, it cant
check capacitor that is breaking down when under load and it cant check
capacitors in circuit. Its still worth to invest in this meter because it can
check almost 80-90 % of capacitors failure.
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