• Input: 150V/30A/300W
• Minimum readback resolution: 1mV/1mA
• 4 static modes / Dynamic mode: CC/CV/CR/CP
• CC Dynamic mode: Continuous, pulsed, toggled
• Measuring the speed of voltage and current: up to 500 kHz

Steady-state operating mode

The SDL features four operating modes to provide flexible test capabilities. In CC mode, the electronic load will sink a constant current, regardless of the voltage at its terminals. In CV mode, the electronic load will cause a constant voltage to appear at its terminals. In CR mode, the electronic load will behave as a fixed resistance value. As shown in the figure, the electronic load will linearly change the current according to the input voltage. In CP mode, the electronic load will cause a constant power to be dissipated in the load.

Dynamic test mode up to 25 kHz (CC)

The transient test allows switching between two different load values. A common application is to test the dynamic characteristics of a DC source or DUT (Device-Under- Test). The transient test function enables the load to periodically switch between two set levels (Level A and Level B). The highest frequency can be set to 25 kHz in CC mode. The highest frequency can be set to 12.5 kHz in CP modes.

4-wire SENSE compensation mode function

In CC/CV/CR/CW mode, when a load is connected to a power supply, it will cause a large voltage-drop on the connection lines between the tested instrument and terminals of load. Using remote sense, you can measure the voltage at the DUTs input terminals, effectively removing the additional error due to the voltage drop in the connection wires.

Program function

In the program (auto-test) mode, you can generate a sequence of tests using different modes, mode parameters, and durations. This function is useful for automatically executing a set of tests on a device then display whether the tests passed or failed. Test results are easily viewed by pressing the up and down buttons. The load provides 8 nonvolatile registers to save the auto-test file for recall later. Each file contains 1-50 steps to set up. Auto-test function is especially useful in designing battery charging circuitry.

Battery discharge function

The SDL1000X can also provide insight into battery performance by analyzing the discharge characteristics of the DUT. The SDL features three-stop conditions for the discharge test: Voltage, capacity, or time. The discharge process is immediately terminated if the stop conditions are met. This provides more control over the test termination and an extra layer of safety during critical tests. Throughout the test process the battery voltage, discharge current, discharge time, and discharged capability are displayed clearly on the LCD panel.