Abstract: A system for reporting operator performance of a machine includes a plurality of sensors and a communications interface. A portable computing device is removably mounted on the machine and has a user identification data code unique to a machine operator. A controller determines an identity of the machine operator based upon the user identification data code, determine the operating conditions based upon signals from the sensors. The controller generates a performance report based at least in part upon performance data and provides the performance report to at least one of the portable computing device and a system remote from the machine.

Abstract: A magnetic shunt device for use in a Hall effect sensor application wherein the shunt device is positioned and located relative to the Hall effect element and is shaped and dimensioned so as to shield and null the influence of the magnetic field when such field is substantially parallel to the sensitive plane of the Hall effect element. The present shunt device ensures that the null output voltage of the Hall effect element in a particular sensor application is consistent for a large number of such sensors despite misalignment problems and mechanical uncertainties in accurately arranging the magnetic devices that generate the magnetic field relative to the Hall effect element at the null or “no action” position of the sensor. The present device also obviates the requirement to use additional electronic circuitry to adjust the output voltage of the Hall effect element at the null or “no action” position.