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Davis barometer and CWOP

Posted: Thu May 10, 2012 8:22 pm
by lonehighway
What is the best way to set up the barometer functions of Meteohub using a Davis Vantage Pro2? It is hard to get it to match the QC profile in CWOP. If MH is set to "use reading from weather station" I can then apply directly a correction to make it accurate with QC, but then when the temperature changes significantly, the QC becomes way off again, 5-6 mb.

If you tell MH to "based on station's altitude", are you supposed to set the Davis console elevation to zero, or my actual elevation as I entered in MH? (5886 ft)

There is no information in the documentation about sea level pressure and altitude as reported to CWOP. What is the best way to set up the Davis and Meteohub to report the correct value to CWOP?

Re: Davis barometer and CWOP

Posted: Thu May 17, 2012 9:33 pm
by lonehighway
Since no one here has a clue, here is what I did. Set the Davis console to 0 elevation. Set Meteohub sea level calculation to "use reading from weather station." Manually set the barometer to the most recent CWOP QC barometer reading. Tweak as necessary.

Seems to be tracking QC very well after that.

Re: Davis barometer and CWOP

Posted: Fri May 18, 2012 8:39 am
by wfpost
well, I don“t know, if we have no clue, but my setup never showed this error.
I have correct values for altitude with my VP2 and meteohub and CWOP is working fine together and uploading correct data.

With your pseudo value entered with your VP2, everything that depends on a correct altitude reading are now wrong also.
Your solution then only creates a havoc of new problems, it seems to me.
The last thing I want to have is wrong figures on my VP2 because of a wrong setup ...

Re: Davis barometer and CWOP

Posted: Fri Jun 01, 2012 9:14 pm
by lonehighway
I don't think havoc would be the right word. It's a simple barometer calibration. See this thread regarding Meteohub and Davis barometers:

http://server.gladstonefamily.net/piper ... 12885.html