Depending on the size capacity of electrolytic capacitors, it usually choose Multimeter R × 10, R × 100, R × 1K block for testing judgement. Red, black T were to form the anode capacitors (each test, required to discharge capacitors), from the partial Biaozhen placed to judge the quality of capacitors. Biaozhen Swing up quickly if the right and then slowly returned to the left in situ, in general capacitor is good. Swing up if Biaozhen no longer rotating, the capacitor that has been penetrated. If Biaozhen Swing up gradually returned to a position of stopping, then capacitors have been leakage. If Biaozhen not put together that has dried up capacitor electrolyte loss pushed capacity.