CH881X+ series program-controlled DC electronic loads can be widely used in online testing and laboratories of power transformers, chargers, switching power supplies, batteries and other industries. The 4.3-inch TFT color screen supports Chinese and English interfaces, and with the well-designed guided menu, the operation is handy; The display information is rich and comprehensive, with a display resolution of 0.001, which can accurately monitor the voltage and current details of the product under test; USB HOST can conveniently use u disk for firmware upgrade; It has rich and comprehensive load functions: constant current CC, constant voltage CV, constant power CP, constant resistance CR, battery discharge test, dynamic test (testing the dynamic output performance of power supply) and list test (testing the performance of power supply under various load conditions); The flexible software and hardware architecture can meet the requirements of users to customize the combined test function, thus improving the test efficiency of production line; Intelligent fan control and excellent heat dissipation performance, combined with over-voltage, over-current, over-power, overheating and voltage polarity reversal and other perfect protection and alarm measures, make the instrument more reliable and safe; The instrument is equipped with RS232 interface as standard, and with rich SCPI instruction set, it can be easily connected to a computer for real-time data acquisition and instrument control.