Laboratory centrifuge and method for operating the same with a reversed driving motion of the rotor during acceleration and deceleration

A method for operating a laboratory centrifuge for centrifuging a product, the laboratory centrifuge comprising a rotor which rotates around a horizontal rotational axis, the product being held at the rotor at a distance of the rotational axis, wherein

• a) the rotor is accelerated from a resting angular position, wherein the product is located between a three o'clock position and a six o'clock position and comprises a zero angular velocity, with an acceleration such that when the rotor for a first time arrives at a reversing angular position, wherein the product is located in a twelve o'clock position, the rotor has reached an angular velocity such that a centrifugal acceleration which acts upon the product is larger than a gravitational acceleration,
• b) during the acceleration the product passes a six o'clock position and the acceleration from the resting angular position to the first arrival at the reversing angular position is provided over an angle of between 180° to 270° and
• c) subsequent to a loading of the product the rotor is transferred with a first sense of rotation from a loading position into the resting angular position from which then the rotor is accelerated with an opposite second sense of rotation towards the reversing angular position.