La Crosse Technology WS-2310 Software Manual page 37

9. Then we copy this formula to all cells in column K. The time axis is now complete.
Before plotting weather graph, please check that the decimal separator of the weather data is comma or point.
If comma is used (preferred by some European users), Excel will not be able to read the weather data directly.
Excel will define the data with comma as text format and thus will not be suitable for graph plotting as co-
ordinates. There are two solutions to solve this problem. First and most the simplest way is to go into Heavy
Weather software and change the decimal separator to point in setup menu and then save the text file again.
Second, follow below procedures to change the decimal separator from comma to point from Excel.