This unit is the 8522 Programmabole DC Electric Load that is ideal for testing and evaluating a large vast range of DC power sources. The unit can function in CC, CV, CR, or CP mode while simultaneously displaying and measuring data. The unit can be programmed via USB interface or using the RS232. The unit provides prototype protection against high temperature, over power, over voltage, over current, and reverse polarity. The unit has a range of flexible operating modes and pin point accuracy which make this unit ideal for categorization of DC Power supplies, DC-DC converters, batteries, fuel cells, and solar cells. The unit is appropriate for use with high voltage applications, and operates between 0-500 VDC, 1 mA-120 A, 2400 W max constant current (CC), resistance (CR), voltage (CV) and power (CP) operation . Unit offers built-in high resolution (1 mA/1 mV) voltage and current measurement depending on range.