1. Using a spreadsheet program such as Excel
Open a blank worksheet and enter the data according to the required file structure. If the specification for example is to enter per row the date and the yield in Watt, then enter in the first column (cell A1) the date, and in the second column (cell A2) the yield for that date in watts. For the next date you take the next line, etc. ..
Important! Please do not enter a semicolon in the fields. These are generated automatically when you save.
Once the data is entered, you click on File -> Save As -> Save as type (in file name) -> CSV (MS-DOS) (* csv.) -> Save.
2. Using a text editor such as Wordpad
Open a text editor and enter the information according to the desired file structure. If the specification for example is to enter for each line the date and the yield in Watt, then enter first the date followed by a semicolon as a separator, and then the yield in watts (example: 29.06.2011;12345). Repeat this on the next line for the next record until you have entered all the records. Then save the file with the extension .csv