Voltage drop testing is also used to test a device's ability to successfully reboot following a complete power outage.Įlectromagnetic surges can be caused by a number of factors, including indirect lightning strikes and routine power switching events. In a voltage drop test, a tapped autotransformer and immunity test system will run a series of simulations featuring dips and dropouts of varying lengths and severities. This replicates the effects of brownouts, as well as the normal fluctuations in the AC mains network that a device may experience. Typical devices requiring this type of immunity testing include CRT monitors, electrodynamic microphones and more.Īs the name implies, voltage drop testing tests the impact of a sudden voltage dip or other power interruption on a piece of equipment. Magnetic field testing uses EMC test equipment to simulate the effects of a magnetic field and ensure a device continues to operate properly. Here we’ll look at seven of the most commonly used methods. Because there is a wide range of potential EM phenomena, multiple types of immunity testing exist. This is important for consumer goods sold internationally, as well as for military, medical, avionics and other specialized products. EMC immunity testing measures the ability of a device to withstand different types of electromagnetic phenomena.
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