Davis products require their Latitude, Longitude and Altitude for setting up the system.


To find out your correct latitude and longitude log on to www.multimap.com and enter your post code and you will be given your location as a decimal.

Ordnance Survey maps showing contour lines will enable you to work out your local altitude reading. If you don't have one for your location you will find one at your local library or look at www.ordnancesurvey.co.uk.

Of course if you own or can borrow a GPS then this should be able to give you a suitably accurate altitude for your location.

Note:- barometric pressure drops by approximately 1hPa for every 9 metres rise above sea level.