1) Set the dial to zero and put
2) Using only end of wrench, tighten to desire NM looking at dial
3) Reset to zero
2) Doesn't ever exceed the torque limit of the wrench. It can over strain the torsion bar and cause permanent damage to the torsion bar.
3) Never drop the wrench.
4) Never use the wrench as a breaker bar or lever
5) Always return to zero setting