Patent ID: 8456172

Claim:
A measurement circuit for measuring short-circuit status capacitor, the measurement circuit comprising: a voltage circuit; a current circuit; a switch unit comprising a plurality of keys, wherein the plurality of keys are selectively pressed to output different resistance regulating signals; a resistance setting circuit to receive the resistance regulating signals from the switch unit and connect different resistances to the voltage circuit and the current circuit, wherein the voltage circuit outputs different voltages to the current circuit according to connected resistance by the resistance setting circuit, the current circuit receives a voltage from the voltage circuit and outputs current to the capacitor; a detecting circuit to measure a temperature of the capacitor and output the temperature to the resistance setting circuit, wherein the resistance setting circuit compares the received temperature with a preset temperature, upon a condition that the received temperature is equal to or greater than the preset temperature, the resistance setting circuit outputs a short-circuit information of the capacitor, upon a condition that the received temperature is less than the preset temperature, the resistance setting circuit outputs a normal information of the capacitor; and a display unit to display the short-circuit information or the normal information of the capacitor.