The Instek PEL-3111A Single-Channel Programmable DC Electronic Load with LAN is designed to test a wide range of different power sources. The DC electronic load is fully programmable to simulate anything from basic static loads to complex dynamic loads. With the ability to operate independently or in parallel, the PEL-3111A is extremely robust and capable of molding to any test environment. With 0.01mA current resolution and 16A/μs current Slew Rate, the PEL-3111A is very ideal for testing server power supply and SPS (Switching Power Supply) for commercial and industrial computers. By connecting Booster 2100W units, the maximum load capacity of the whole system can reach 9,450W. Hence, the PEL-3111A fulfills various power testing requirements including medium to low power or high-power power supply.

The PEL-3111A has seven operating modes and three operating functions. Among the seven operating modes, four of them are basic operating modes, including constant current, constant voltage, constant resistance, and constant power, and the other three are advanced operating modes including constant current + constant voltage, constant resistance + constant voltage, and constant power + constant voltage. Users must first select operating mode and then operating function based upon the test requirements. Static, Dynamic and Sequence operating functions can be applied to different testing conditions including a fixed load level, switching between two levels or switching among more than two levels. Sequence function is divided into Fast Sequence and Normal Sequence according to the test time of each step. Both Dynamic and Sequence are to assist users to simulate the genuine load change. For instance, PEL-3111A can simulate HEV current consumption to make sure that automobile battery can supply HEV with sufficient power need on the road. By so doing, manufacturers can elevate product quality and reliability.

The Soft Start function of the PEL-3111A can set current rise time for the moment it is turned on to reduce the abnormal situation of the voltage drop of power supply under test. The adjustable Under Voltage Protection (UVP), GO/NO GO voltage input monitoring function, current monitoring function and Timer Function to control load activation time can be jointly applied to the characteristic tests of battery bleeding to avoid battery damage during bleeding operation. Based upon the functionalities described above, the PEL-3111A can test a vast variety of power supply ranging from the fundamental static sink current to complex dynamic load simulations so as to enhance product quality and reliability.