Abstract: The automatic chemical analyzer includes a turntable adapted to hold a plurality of disposable cuvettes. An optical system adjacent to the turntable can perform tests on the contents of each cuvette as they are rotated on the turntable. A sample/reagent tray is rotatably mounted about an axis parallel to the turntable axis. A common probe arm pivoted about a third parallel axis mounts a pipette that can be moved along an arcuate path intersecting a cuvette access station on the turntable and at least one container access station on the sample/reagent tray for transferring liquids as required by specific test procedures. A wash/alignment station is provided to facilitate flushing on the pipette between liquid deliveries. Combined within it is an alignment plate that checks the radial position of the pipette relative to the probe arm axis and the elevation of the pipette tip relative to the supporting instrument framework.

Abstract: The cuvette delivery apparatus for an automatic chemical analyzer includes a magazine that stores multiple stacks of substantially rectangular cuvettes. A ram outwardly adjacent to the magazine moves an exposed cuvette from a selected stack into an awaiting compartment of a turntable. Random access is provided to all stacks within the magazine. A mechanical follower monitors the selected stack and provides stack information for updating of cuvette inventory.