I have a question regarding the pressure adjustments made on an Atlas display after the Learning Mode is completed.
Here is my situation: I have an Atlas outdoor unit, an Access connected to MyAcurite, and a municipal airport about 7-8 miles away that reports weather conditions. I have entered the elevation of my location unit into MyAcurite. It has been >45 days since the Learning Mode for the Atlas display was started, so it should be completed. I have the display running on an uninterrupted power supply and I have a whole-house generator so there is no way that the display lost power which would have caused to Learning Mode to restart. The Atlas display and the Access are in the same room, approximately 15 feet away from each other.
Historically, I get excellent agreement between the pressure readings from the Access unit and the airport. About 40 days after the start of the Learning Mode, I needed only a small adjustment to get agreement between the Atlas display and the Access pressure reading.The good agreement between the display and the Access occurs most of the time. However, whenever we are experiencing either high pressure or low pressure excursions from 29.92 in Hg, the agreement is lost. The display reads high during low pressure conditions (< about 29.50 in Hg) and it reads low during high pressure conditions (> about 30.30 in. Hg). It almost seems like the Learning Mode, in addition to correcting for elevation, is also attenuating the measurement before reporting it. Does anyone know enough about the Learning Mode to know if this is possible?