Why did the field problem occur even though the EMC test was carried out?
Current immunity testing for transient phenomena defined by international standards describes a test method that applies a waveform simulating typical electromagnetic noise that occurs in nature, such as ESD, EFT/B and lightning surge.
However, in the actual field, we can be affected by various noises beyond those phenomena described in the standard.
In case of the EFT/B test, it provides only limited power line noise test and sometimes is difficult to reproduce design failures.
NoiseKen’s INS (Impulse Noise Simulator) provides a unique test method that covers the noise phenomena which cannot be reproduced by the EFT/B test defined by the international standard IEC 61000-4-4.