Centrifuge control system having dual processors

Claim 1

In a control system for a centrifuge instrument having a motor with a shaft and a source of energy for the motor, the motor being operative to rotate the shaft to a rotational speed, a tachometer operative to generate a signal representative of the actual rotational speed of the shaft, the system including programmable controller means for providing a predetermined set of instrument control functions including the function of conditionally coupling the source to the motor, wherein the improvement comprises: the programmable controller means having a first and a second processor therein, the processors being configured in a master-slave relationship for some predetermined subset of the instrument control functions during the execution of which the slave operates under the direction of the master to effect that subset of control functions, each of the processors being independently responsive to the speed signal from the tachometer and each comprising means for independently controlling the function of conditionally coupling the source to the motor.