The calibrated load cell, (with a + or - 5 lbs range & a safe overload of 150%), is not fastened to the torque arm. The specially designed ball adaptor sits on the load cell's stud to prevent errors caused by any mis-alignment. The ball adaptor also has a screw thread on its top end, which allows weights to be attached, for acuuracy checks, after zero setting the load cell. Notice the mounting of the load cell base, which is adjustable up & down, to allow the torque arm to be adjusted perpendicular to the load cell axis.
