Analysegerät mit automatischer Prüfung der Geradlinigkeit der Pipettiernadel

摘要

A biological specimen analyser has a baseplate carrying primary and secondary vessels and an electrically conductive pipette needle to transfer set fluid vols. from the primary to the secondary vessels. A transport mechanism moves the pipette needle in three directions, two of which are horizontal and the other vertical. A drive moves the tip of the pipette needle (42) around the periphery of the upper edge of a reference block (45). The needle tip is kept at a set distance (d) from the upper edge of the reference block and this distance is a measure of the permissible curvature of the needle. An electrical circuit detects any contact between the needle tip and the reference block.