How can electromagnetic interference affect electrical measurements?

Electromagnetic interference (EMI) can disrupt the proper functioning of electrical measurement instruments by introducing noise into the signals being measured. This interference can stem from various sources, such as power lines, motors, or other electronic devices, which can produce electromagnetic fields that overlap with the signals of interest. When EMI is present, it can create erratic fluctuations in the measurements, leading to inaccurate readings that do not reflect the true values of the electrical parameters being monitored.

Therefore, the correct recognition that EMI can cause inaccuracies in readings is critical for anyone involved in electrical measurements. Understanding this aspect of measurement safety helps professionals take necessary precautions, like employing shielding or using differential measurements, to mitigate the effects of EMI and enhance measurement reliability.