Barometric Pressure off (corrected once CL system is deployed)

[moeythomas]

@peter

OK - I think see what you are saying.

This is a calibration problem though, right? If I understand correctly you enter the correct elevation into your Davis station and then you manually adjust the station pressure measured by the Davis unit to match it to some nearby trusted source. So in a sense you are adding a custom calibration to your Davis unit to report the best station pressure you can, and then combined with the correct elevation you get the best sea level pressure.

Unfortunately you can’t apply the same direct calibration to the station pressure measured by the Air module. So if my understanding is correct, the station pressure measured by your Air unit and you Davis unit are going to be different. You can see the station pressure in the text display on the WF app so you should be able to see how big the difference is. Therefore if you apply the same elevation to calculate sea level pressure, you end up with a different value to your Davis unit. As you can’t apply a direct offset to the Air station pressure, the only way to get the sea level pressure to read the same is to fudge your elevation - in this case -40ft below sea level.

That’s absolutely correct. I should be able to enter my correct elevation (10m above sea level) then adjust the station pressure to a reliable source and bingo, you get a calculated sea level reading.

If I set my correct elevation in the WeatherFlow app, the sea level pressure is adjusted, but station pressure remains unchanged, and that is also incorrect when comparing to my Davis VP2 and Vue console, as well as nearest observations.

The simplest form I can put it in is that the sea level pressure on the app is showing what my station pressure should be, and station pressure is showing something else.