Abstract: An electronically calibrated fuel dispenser includes a processor located on a processor board, a fuel pump, a pulser circuit and a memory located on a memory board. The processor board includes a calibration factor connector. The fuel pump is coupled to a fuel source and includes a fuel meter. The fuel pump provides fuel to a fuel recipient. The pulser circuit is coupled to the fuel meter. The pulser circuit provides an indication to the processor of the fuel delivered to the fuel recipient. The memory board includes a connector for coupling the memory board to the calibration factor connector of the processor board and thereby coupling the memory to the processor. The memory stores calibration factors independent of the processor board. The memory board further includes a calibration mode entry device, a blocking device and a sealing device. The blocking device prevents the calibration mode entry device from being actuated when the blocking device is in a blocking position.