A bale weighing system is part of the bale handling system. It consists of a weighing scale that is built into the floor, so that the bale evacuator can drive onto it. The weight of the bale evacuator is deducted, so that the weight of the bale is measured. The weight can be read from a display.
The weighing system is calibratable, but the calibration itself must be done locally by a calibration agency.