How to connect LaCrosse TX23IT+ ?


I am trying to connect a LaCrosse TX23IT+ anemometer to my arduino card in order of my school projet (weather station).
The problem is that I do not really know how i'm supposed to connect it to my arduino card (Arduino UNO), i've read something about a "pull-up resistor" but as a beginner in electronic i'm a little bit lost

Is there anyone to explain me how to connect this anemometer maybe with a diagram ?

Thank's in advance

PS: I looked for a tip in differents topics in that forum but this is not clear to me anymore.

This might help Anemometer sensor TX23 IT+ - Sensors - Arduino Forum