A workstation includes a first window located in an upright plane, a second window located in a generally horizontal plane that intersects the upright plane, and a controller operative to read a barcode, and a weighing system having a horizontal platter operative to measure the weight of produce exerting gravitational force on the horizontal platter. The count of ingress data rate signal pulses at the time that data is requested by a switch fabric is compared to the count of egress data rate signal pulses at the time the requested data is passed through the switch fabric. The valve head has a peripheral surface extending from the exterior surface toward the interior surface.