A portable electronic device is provided. The harvesting float has an axial passage and a density to settle in the sample fluid and expand the layer of the target component. The second future time provides a boundary between schedules occurring sooner and schedules occurring later. The power control may also include a front-end regulator providing an intermediate voltage to the plurality of POL regulators on an intermediate voltage bus. As the toner cartridge is engaged with the development cartridge, the locking protrusion contacts the rib and the locker is locked in the locking recess. Automatic lab notebook construction is also provided as well as remote monitoring and control options, warning alarms and shut down alarms.