Abstract: The disclosed invention is a control system for the systematic testing, calibration, and operation of weighting apparatus having multiple inputs. The invention also provides a fault alarm.The system utilizes a summing network of resistors and switches to isolate and test or calibrate selected load cells controlled by the system Additionally, the summing network and the isolation switches of the control system provide a means for continued operation of defective scales having substantially equal load inputs. This is accomplished by electrically isolating those load cells which have become defective.

Abstract: This invention relates to a system for mounting and removal of one or more electronic load cells (or similarly configured spacers) of the type used in heavy capacity industrial weight scales. In addition to the mounting of the load cells the system provides a means for the selective application or removal of weight normally applied to the load cells (or similarly configured spacers) through a scale apparatus. The system thus facilitates the testing, calibration, or replacement of the load cells.