Radar Level Transmitter Showing False High Level During Heavy Rain
I’m facing a strange issue with an 80 GHz radar level transmitter installed on a diesel storage tank. During heavy rain, the level suddenly jumps from around 45% to nearly 90%, which triggers a high-level alarm in the DCS. We checked the tank inventory and even verified the level manually, and the actual level remains around 45%. Once the rain stops, the reading slowly returns to normal. The transmitter has been running fine for years, but we recently installed a new sampling pipe inside the tank. Has anyone experienced something similar? What would you check first—antenna condition, false echo mapping, or something else?