A sampling system for collecting a liquid sample, having at least one analytic auxiliary means is proposed. The sampling system has a coupling element for coupling onto the analytic auxiliary means and at least one drive unit for driving a movement of the coupling element from a rest position into a deflected position. The drive unit comprises an energy transducer which is designed to generate a rotational movement with different rotational directions. The drive unit furthermore has a coupling device with at least one rotational-direction sensitive element, wherein the coupling device is designed to couple the energy transducer to a first system function in a first rotational direction, and to couple said transducer to a second system function which differs from the first system function in a second rotational direction which differs from the first rotational direction.
