Thank you for your fast answer.
But the link doesn't help me, because I don't know where I have to start to customize this VI in correct way.
Can you tell me, what I have to do?

Dear Pico-team,
i bought two TC-08 thermo data logger. i was succesful by using your VI's (2UnitSelect.VI).
Now, I want to buy a third TC-08 but don't know how to make it with Labview.
Can you help me?

Sincerely,
korken26 (germany)