A system for managing a plurality of carriers in a mail sorting facility includes a server configured to create, implement andor execute a sort plan, a plurality of terminals disposed on the plurality of carriers and each configured to send a wireless beacon signal and at least one gateway in communication with the server and configured to receive the wireless beacon signals from the terminals. A driving current of the OLED of a pixel portion is measured, and a value of the voltage supplied to the pixel portion from a variable power supply is corrected such that the measured driving current has a reference value. After firing, the loading assembly is actuated to extract and eject the spent ignition device and load a new ignition device onto the breech plug.