The electronic load ELA1120 can be used for stress testing of power supplys, any other DC power sources, test and calibration of electric current meters, electronic fuses, for the condition assessment and discharge of batteries. Power devices to check their load-bearing capacity the ELA1120 is a big help. While there are other possibilities for such a test, to perform the effort is much greater. It must first suitable power resistors are available, and the load (current flow) can only be changed gradually. This is not if the ELA1120 is used. Unlike a simple ohmic resistance the current remains constant due to the integrated control electronics. In the controlled discharge of a battery the actually stored energy can be determined. The load (the current set) must be converted in a different form of energy namly into heat. This succeeds so much the better, the lower the surroundings temperature is. The maximum continuous load of 220 watts is at an ambient temperature of up to 20°C. Since such large currents are rarely needed, the ELA1120 is equipped with an active, temperature-controlled fan. The ELA1120 allows a very precise current adjustment. For very small currents, for example to test the brightness of light emitting diodes (LED) with adjustable currents, a current range of 1mA to 200mA exists. For load testing of large consumers or electricity meters, alternatively, the large load area can be used up to 20A. In each area, the load current flowing through the high-quality laboratory rheostat, whose range usually extends about 10 revolutions accurately selected. Load flows at a constant continuous current and not, as with other control circuits, a pulsed current. Only the use of this ELA1120 also allows for testing and calibration of current measuring devices. Applications - Stress test of switching power supplies, which are frequently found also for the supply of eg CNC machines, laptops & PCs
- Stress test of linear regulated laboratory power supplies (DC)
- When arranging a rectifier is also the test of AC power supplies possible
- Discharge of batteries with preselected current and max. 20A (up to battery open circuit voltage, in a charged state, max. 11V)
- Current calibration of electricity meters with the help of a reference current-meter
- Determination the brightness of light sources such as lamps and light emitting diodes (LEDs), with continuously variable currents
- Gentle load increase of the power source while watching
- Be interposed for setting and measuring the current flowing must be a commercial ammeter / multimeter with sufficient capacity
Technical Data Subject | Data | Voltage source | 0 to 30V (max. 35V), Use from ca.1 to 30 Volt DC | Current control | Via Precision controller with 10 revolutions | Two current ranges | 1 to 200mA and 0 to 20A (maximum load is temperature dependent) | Tolerance rule | Better than 1% after reaching the operating temperature | Maximum power dissipation | ca. 220 Watt at 11 Volts and 20 Amps and at max. 20°C ambient temperature | Overcurrent protection | Yes (voltage dependent) | Cooling | With active thermal controlled fan | Power supply | Stable power supply 12V DC 500mA | Maximum current display | By LED at 0.2A or 20A (load-range dependent) | Front connectors | Standard 4mm banana jacks | Over temperature protection | - | Max Current (standard operating range of 0 to 30V) Voltage | Current Range to 200mA | Current Range to 20A | 0V to 11V | 0,200A | 20A | 12V to 18V | 0,100A | 10A | 19V to 30V | 0,030A | 3A | 31V to 35V | 0,007A | 0,7A | Available Options: | Processing time: | | |