La Crosse Technology WS-2010 Software Manual page 23

The number of sensors to be supported can be modified using menu "Interface",
submenu "Properties", option "Initialize".
Note:
If these settings are changed, the radio interface is re-initialized. All the weather
data stored up to then is lost. In addition, the radio interface cannot send any
data to the PC for approx. 6 minutes because the weather station (radio inter-
face) because automatically scans for all the available sensors during this peri-
od.
In order to display the correct air pressure, the height of the installation site
above sea level (NN) must be specified, in ft, in the weather station and software.
To do this, activate the "File" menu, "Specifications" option and enter the absolute
height above 0 in the corresponding input field.
The rainfall measuring system leaves the factory with a very high degree of
accuracy so that no adjustment is normally necessary. However, adjustment is
possible in individual cases where extreme precision is necessary for profes-
sional requirements. The entry is made in the "Specifications" option in the "Rainfall
per collector"
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