Laboratory Centrifuge and Method for Operating the Same

摘要

The invention relates to a method for the operation of a laboratory centrifuge (1), wherein a rotor (2) rotates around a horizontal rotational axis (3). It should be avoided that during the start-up of the laboratory centrifuge (1) or the deceleration of the laboratory centrifuge (1) for small angular velocities and small centrifugal forces resulting therefrom due to the gravitational acceleration the product (6) is biased by resulting components of the acceleration in vertical direction which change their sense of direction. For this purpose the acceleration of the rotor (2) is chosen such that when arriving for the first time in a reversing angular position (twelve o'clock position) there is already a centrifugal acceleration being larger than the gravitational acceleration. The corresponding applies for the deceleration of the rotor after the centrifugation.

主权项

1. 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 six o'clock position and a nine 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.