Automatic centrifuge, pre-analysis system with automatic centrifuge and the control techniques of that system

A control technique of a pre-analysis system, comprising:

• a first comparing step of comparing between weights of specimens installed at a first adaptor and a second adaptor;
• a second comparing step of comparing between weights of specimens installed at the first adaptor and the second adaptor when a specimen container to be transferred next has been transferred to the first adaptor determined as being lighter in the step;
• and,
• if a difference between the weights of the plurality of adaptors in the step is equal to or larger than a predetermined threshold value, an installing step of installing a specimen container to be transferred next at another adaptor except for the first adaptor and the second adaptor.

An automatic centrifuge including at least two adaptors which are positioned symmetrically to each other across a rotation central axis and which include a specimen holding unit at which a plurality of specimen containers can be installed,

• the automatic centrifuge comprising:
• a holding region which holds a predetermined number of specimen containers;
• and
• conveying means conveying the specimen container housed in the holding region to the adaptor, and
• the conveying means installing the specimen containers sequentially in an order from a position closer to a gravity center in a specimen holding unit of the adaptor.