How best to calibrate

darc · **Posted:** Sat Jul 07, 2012 9:00 am

Now my weather station seems to be more stable.
How best to calibrate Cumulus for the best result is there any rules to follow ?

steve · **Posted:** Sat Jul 07, 2012 9:31 am

The only 'rule' is don't calibrate, unless you know your readings are wrong and you have a good nearby reference to calibrate against.

The one thing you should do is to set the sea-level pressure on your station. Preferably do this on a day when the pressure is stable, so you can use the pressure reading from a Met Office station and any difference in time or distance doesn't matter. Set your station to read the same. Restart Cumulus if you make any changes to the pressure on your station.

darc · **Posted:** Sat Jul 07, 2012 10:30 am

Thanks Steve was not to sure where is best place to get the most accurate Lat / Long and Altitude from done on sat nav / google maps and google earth and they are all different should I just take a guied from them.

Thanks Geoff

RayProudfoot · **Posted:** Sat Jul 07, 2012 11:33 am

Geoff,

I googled find latitude, longitude and altitude and this seems to be the best of the bunch for altitude. http://www.daftlogic.com/sandbox-google ... titude.htm

For latitude and longitude this is more user-friendly as it gives your position in degrees, minutes and seconds for Cumulus. http://www.findlatitudeandlongitude.com/

For both enter your full postal address minus the PC.

darc · **Posted:** Sun Jul 08, 2012 5:43 pm

Thanks Ray for your help again I don't think I'm far out, Whats the weather like up your end now has been very heavy here now for nearly 2 hours now.

Geoff

RayProudfoot · **Posted:** Sun Jul 08, 2012 6:13 pm

You've only had 1.2mm according to your website. One brief shower here this afternoon with 0.1". Not bad for our summer.

You're pressure is looking okay now.

	It is currently Tue May 21, 2013 8:52 pm
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How best to calibrate

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