Patent ID: 6841129

Claim:
A device for conveying a liquid including at least one of dispensing and aspirating the liquid comprising: a controlling device adapted to convey the liquid; a motor drive for operating the controlling device; control electronics for controlling the motor drive and for setting at least one process interval (t p ) for a plurality of process steps to be carried out in succession; a manually actuatable actuating element connected to the control electronics to allow actuation of the control electronics to convey the liquid; and a programming element for programmining the control electronics to adjust control of the motor drive to thereby adjust the quantity of liquid conveyed upon actuation of the actuating element; wherein a first type of actuation of the actuating element manually triggers an individual process step, and a second type of actuation of the actuating element automatically causes automatic repeated successive triggering of process steps, each in the process interval (t p ); and wherein the process interval (t p ) is determined by the control electronics by analyzing at least one interval occurring between manual actuations of the actuating element.