Monday, November 18, 2019

AC noise from elevator

AC noise generated from the building's elevator moving, is quite visible from Chart#2 compared to the baseline Chart#1. The so called "EMI Meter" from Green Wave also reports up to 1000mV of noise compared to the baseline's 46mv. Unfortunately, no AC filter including the one from Green Wave, or even an ISO transformer can block such noise.

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No photo description available.

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