WS2300 Rainsensor extend the suquare

Hi I have seen a modified Rainsenor (http://livewetter.ristau.ws/ link Station) to get more accuracy. Do I have to modffy parameters in the WD SW or / and in the WS2300? How can I calibrate the sensor?

thanks for help
peter

hi
yes, change the modified rain amount in the barometer/rainfall/offsets setup screen (see under control panel)
i.e if you double the area, set the modified rain tip to 0.5