MS-500L全自动电容电感测试仪采用桥式电路结构，标准电容器和被试电容器作为桥式电路的两臂。当进行电容器电容值测量时，测试电压同时施加在标准电容器和被试电容器上，处理器通过传感器同采集流过两者的电流信号并进行处理后得也被试电容器的电容值。
MS-500L full-automatic capacitance and inductance tester uses bridge circuit structure, standard capacitor and tested capacitor as two arms of bridge circuit. When the capacitance value of capacitor is measured, the test voltage is applied to both the standard capacitor and the tested capacitor. The processor collects the current signals flowing through both capacitors through the sensor and after processing, the capacitance value of the tested capacitor can also be obtained.
由于采用标准电容器、被试电容器同步采样技术，可不受电源电压波动的影响；加之测量过程是全自动进行的，避免了手动操作引起的误差，因此具有稳定性好、重复性好，准确可靠的特点。
Because the synchronous sampling technology of standard capacitor and tested capacitor is not affected by the fluctuation of power supply voltage, and the measurement process is automatic, avoiding the error caused by manual operation, it has the characteristics of good stability, good repeatability, accuracy and reliability.