Anyone know how to change the testo 502 Hygrometer from C* to F*. I don't have the manual on me, and it switched in my bag. Thanks
If you mean a Testo 605-H2, press and hold the power key when you turn it on and toggle through the units of measure and set them.
Thanks Jim, I did mean the 605-H2. I switched it back. It made me realize how much I use it.