Features: High accuracy and high resolution 1mV/1mA. High brightness VFD display. Automatic switch between constant voltage and constant current. With output control switch for more flexible control. Convenient and fast operation and setting interface, quick adjustment knob and digital button control. With timing output function, supports output of unlimited or specified cycle number. 100 groups of data storage and recall functions, can store/recall 100 groups of voltage and current data. Users can achieve simple automatic test matching with timing output function. Remote sensing to compensate for the voltage drop of the load line. Overload, reverse polarity protection, overvoltage protection, overcurrent protection, over temperature protection. One-button lock function to effectively prevent misoperation. Built-in buzzer as a prompt or warning. Built-in temperature control fan for fast heat dissipation, which has low noise and can extend the service life of machine. Low resistance measurement function can display load resistance value. Supports battery charging function. Standard RS232 interface, programming instruction set conforms to SCPI. Specification: Model IPS-900B-20-45 Rated DC Output（ 0 ℃ ~40 ℃） Voltage 0~20V Current 0~45A Overvoltage Protection 0.1~23V Overcurrent Protection 0.1~50A Voltage Output Power Effect ≤0.01%+4mV Load Effect ≤0.1%+5mV Recorvery Time ≤1.5ms (50% load change) Ripple & Noise 2mVrms, 30mVpp Temperature Coefficient ≤300ppm/ ℃ Setting Accuracy ±(0.03% of reading + 10mV) (25±5 ℃ ) Setting Resolution 1mV Current Output Power Effect ≤0.2%+3mA Load Effect ≤0.2%+5mA Ripple & Noise ≤10mArms Setting Accuracy ±(0.3% of reading + 10mA) (25±5 ℃ ) Setting Resolution 1mA Display Voltage 5 digits display Current 5 digits display Voltage Resolution 1mV Current Resolution 1mA Reading Accuracy ±(0.02% of reading +5mV) (25±5 ℃ ); ±(0.05% of reading +10mA) (25±5 ℃ ) Protection Overload, Reverse Polarity, Overvoltage, Overcurrent, Over Temperature Remote Sensing Maximum compensation voltage 0.1V Battery Charging Lithium battery curve charging Interface Standard RS232 interface, support SCPI programming instruction set Storage Recall 100 groups Insulativity Between output terminals and housing or other terminals: ≤60VDC Operating Environment Indoor Use Altitude: ≤2000m Temperature: 0~40 ℃ Relative Humidity: ≤80% Install Level: I I Pollution Level: 2 Storage Environment -10~70 ℃, ≤70%RH Plug Type EU plug, UK plug, AU plug ( O ptional ) Input Voltage AC 200-240V Size 41.2*21.5*8.9cm / 16.2*8.4*3.5in Weight Approx. 5850g/206.4oz Package list: 1 * DC Programmable Power Supply 1 * Power Cable 1 * RS232 Interface Cable 1 * User Manual