Are you asking how much your tension should differ from a lock-out or some other machine that was used on it previously?
Unfortunately, there is no set answer to that question. A few months ago, I got an Alpha Pioneer DC Plus dropweight stringer. My previous stringing professional used a Prince Neos 1000 lock-out machine, and he was very good about keeping it calibrated. Through trial and error, it didn't take me too long to find that my Alpha was stringing 4 lbs. tighter than his.