Cumulus Support

Especially ecowitt ones, for anyone that has more experience with these

I've recently discovered that my pressure readings may have been incorrect. I setup to share my data with AWEKAS and within a day or so my pressure readings were locked as they did not fit with surrounding stations. I share through cumulus, so the first thing I did was check what was going on there - but it seemed fine. I checked the display and the figures were matching what was going out - however one thing I do notice is that relative and absolute pressure are the same? I live 30+ miles from the sea and on the side of a valley, so I don't think that should be correct.

I started to write this and went to take a screenshot and noticed that within the last day or two, suddenly my readings are matching again - I don't think I made any relevant change to settings, I was still trying to convert millibars to hpa to understand what it should be - and I didn't want to recalibrate anything until I understood what was going wrong.

So yay - my data matches the few surrounding stations within 20kms. Still doesn't explain A: why and B: when I switch between ABS and REL on the display nothing changes? Does anyone have any thoughts on this phenomenon?

Thanks!

I can’t explain the problem your graph shows. But if you want the pressures to work correctly, you must calibrate two things. First you have to adjust the difference between absolute and relative to match the elevation of your location regards to sea level. After that you then calibrate the absolute pressure so that your relative pressure is correct when compared to nearby reliable stations. There is a good explanation on wxforum by Gyvate.

https://www.wxforum.net/index.php?topic ... #msg443831