An apparatus for transport and controlled discharge of a load has a frame with a guide for a series of displaceable transport containers, a drive unit for carrying the containers in an endless track, a resetting device for placing a container in a starting position and discharge station for selectively relieving a container of a load. A computing system broadcasts first audio data and video data associated with the first audio data. A first interface is provided by the computer and is used by a service technician to configure the biological fluid processing instrument for a number of disposable components and to provide a service technician with a validation code. Permanent magnets are inserted into slots formed such that they penetrate the rotor yoke. A heater is embedded within the flat support andor disposed on an underside of the flat support. Each of the sensor insoles includes a substrate layer, force sensors, and a transmitter for transmitting data from the force sensors.