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:ModelIPS-900B-20-45Rated DC Output0~40Voltage0~20VCurrent0~45AOvervoltage Protection0.1~23VOvercurrent Protection0.1~50AVoltage OutputPower Effect0.01%+4mVLoad Effect0.1%+5mVRecorvery Time1.5ms (50% load change)Ripple & Noise2mVrms, 30mVppTemperature Coefficient300ppm/Setting Accuracy(0.03% of reading + 10mV) (255)Setting Resolution1mVCurrent OutputPower Effect0.2%+3mALoad Effect0.2%+5mARipple & Noise10mArmsSetting Accuracy(0.3% of reading + 10mA) (255)Setting Resolution1mADisplayVoltage5 digits displayCurrent5 digits displayVoltage Resolution1mVCurrent Resolution1mAReading Accuracy(0.02% of reading +5mV) (255); (0.05% of reading +10mA) (255)ProtectionOverload, Reverse Polarity, Overvoltage, Overcurrent, Over TemperatureRemote SensingMaximum compensation voltage 0.1VBattery ChargingLithium battery curve chargingInterfaceStandard RS232 interface, support SCPI programming instruction setStorage Recall100 groupsInsulativityBetween output terminals and housing or other terminals: 60VDCOperating EnvironmentIndoor UseAltitude: 2000mTemperature: 0~40Relative Humidity: 80%Install Level: IIPollution Level: 2Storage Environment-10~70,70%RHPlug TypeEU plug, UK plug, AU plug (Optional)Input VoltageAC 200-240V Size41.2*21.5*8.9cm / 16.2*8.4*3.5inWeightApprox. 5850g/206.4ozPackage list:1 * DC Programmable Power Supply1 * Power Cable1 * RS232 Interface Cable1 * User Manual