Cumulus Support

I had to move my weather station and as part of doing that I had to take the batteries out of the console and get it to re-link.

All went fine and I have everything working except the pressure. I have rest the relative pressure to the correct one for where I am 640ft up in the Mendips and it is showing the correct pressure on the console, Cumulus MX is stubbornly showing a pressure 12Mb lower that the console i.e. Console 1024.2Mb Cumulus 1012.8Mb!!

What have I done wrong?

This is Cumulus MX by the way.

Is it because I should have set Absolute Pressure rather Relative pressure?

I have this weird feeling when I originally set it up years ago I had to enter the height above sea level but I cannot find it in the instructions for the Fine Offset?

Did you (re)start MX after setting the console?

Hello Steve yes as I restored the data from the 12 o'clock rollover and then restarted it.

Well that is weird Steve. When I read your original reply I thought you meant after I reset the console, then I realised you may have meant after I reset the Relative Pressure, which I hadn't. So I thought I ought to do that, and bingo the right reading appeared.

I just assumed that Cumulus would pick up the changed relative Pressure on the Console automatically without having to restart it but that is obviously not the case.

Thanks Steve.

It only calculates the offset when it starts up. Otherwise it would have keep reading a separate memory location every time it reads the current data, for something that rarely changes. The current data contains the absolute pressure rather than the relative pressure - I don't know why they chose to do it that way.