Cars & Other Vehicles What is Scout Pro? How do I calibrate my Scout Pro 200g? - Step 1: Press & hold the ON/ZERO button until you see MENU on the display. - Step 2: Release the ON/ZERO button. Display should now read .C.A.L. - Step 3: Press the ON/ZERO button one time (do not hold). Display should briefly flash -C- and then. Related Posts:Why does the church collect 10 dollars?How do you congratulate an Eagle Scout?How To Start and Manage a Daisy Girl Scout TroopHow To There is a Daisy Girl Scout Troop.