How do you change from fahrenheit to celsius on my 5010?

Changing range on 5010 series controls:

1) Down load manual for 5010 series.
5010 Manual

Range Codes:

2) Go to page 101 in downloaded manual or A-2 in printed manual. Select the desired range and type from the available options. (Note the Txxxx code for the desired range).

Input Switches:

3) Go to page 98 in the downloaded manual or 7-3 in the printed manual. Confirm the input type switches on your control are positioned properly for the selected input type.

Configuration Mode:

4) Go to page 81 in the downloaded manual or 6-1 in the printed manual. Follow instructions for entering the configuration mode and the selection of the input range code.