The Elektro-Automatik EL 9080-45 DT 80V/45A/600W Programmable DC Electronic Load with Function Generator (400W@25°C) is a desktop load that offers voltage, current and power ratings for a multitude of applications and daily use in laboratories, schools or workshops. This model supports the four regulation modes: constant voltage (CV), constant current (CC), constant power (CP), and constant resistance (CR). At the core of the control circuit is a fast microprocessor which provides features such as a true function generator - with common functions like sine wave, rectangle or triangle - but also an arbitrary function generator. The color TFT touch panel offers intuitive operation, mimicking other common smart devices. Response times during device control via analog or digital interface have an ARM processor-controlled hardware. The EL 9080-45 DT comes standard USB and Ethernet interfaces, as well as an analog one. All interfaces are galvanically isolated. Remote control and implementation into custom applications for every purpose is simplified by the common protocols SCPI and ModBus RTU, as well as by ready-to-use LabView components.
Manual operation is done with a TFT touch panel, two rotary knobs and a push-button. The large color display shows all relevant set of values and actual values at a glance. The whole setup is also done with the human-machine interface, as well as the configuration of functions (square, triangle, sine, etc.). The display is also multilingual (German, English, Russian, Chinese).
The EA-EL 9080-45 DT includes a function generator, which can generate typical functions and apply them to either the input voltage or the input current. The generator can be completely configured and controlled by using the touch panel on the front of the device, or by remote control via one of the digital interfaces. These predefined functions offer the user all of the necessary parameters, such as Y offset, time/frequency, or amplitude for full configurability. Additional to its standard functions, which are all based upon an arbitrary generator, this base generator is accessible for the creation and execution of complex sets of functions, separated into up to 99 sequences. These can be used for testing purposes in development and production. The sequences can be loaded from, and saved to a standard USB stick via the USB port on the front panel, making it easy to change between different test sequences.
For purposes of testing all kinds of batteries - for example, constant current or constant resistance discharging - the EL 9080-45 DT offers a battery test mode. It counts values for elapsed testing time and consumed capacity (Ah) and energy (Wh). Data recorded by the PC during tests with EA Power Control Software can be exported as an Excel table in CSV format and be analyzed as data, or even visualized as a discharge diagram. For a more detailed setup, there is an adjustable threshold to stop the battery test on low battery voltage, as well an adjustable test period. For photovoltaics related tests there is another function included as standard: MPP tracking. Four modes allow for simulation of the typical characteristics of solar inverters being connected to solar modules or panels. The function is used to determine typical operation parameters, such as the so-called Maximum Power Point and the related values UMPP, IMPP and PMPP. One of the modes even offers particular analysis with different irradiation values in the form of a table with 100 points.
The EL 9080-45 DT is equipped with thermal derating in order to avoid overheating when operating in the maximum power range. The lower the ambient temperature, and the better the cooling, the higher the power that the load can take. The nominal intake power before the derating starts is defined at 25°C ambient temperature.
For remote control, there are USB, Ethernet and analog ports available as standard on the rear of the EL 9080-45 DT device. Another USB port, located on the front side, is intended for USB sticks in order to load and save functions and user profiles. Windows users can utilize the included EA Power Control software to access "Sequencing", where the device is controlled through a semi-automatic table in CSV format. This table represents a simple test procedure and can be created and edited in MS Excel or other CSV editors and then imported into the software tool.
