Abstract: There is disclosed a measuring system that is for use with an automatic chemical analyzer and accomplishes accurate measurement reproducibility and low cost. The system has a turntable on which plural reaction cells are arranged circumferentially. A light source and a spectroscopic detector are located on opposite sides of the reaction cell in a detection position. The amount of light transmitted through the cell is measured. A motor having an encoder is connected to the turntable. The output signal from the detector corresponding to each reaction cell is accepted in response to the output signal from the encoder.

Abstract: There is disclosed an automatic biochemical analyzer having a sample turntable and a reaction turntable. Plural sample containers for holding samples are arrayed on the sample turntable. Plural reaction containers are arrayed on the reaction turntable. A sampling pipette draws in a sample from some sampling container and injects the sample into some reaction container. A reagent pipette draws in some reagent from some reagent container and injects the reagent into the same reaction container. The resulting mixture is stirred by a stirring device. Produced reaction products are detected by a detector. Let N be the number of the reaction containers on the reaction turntable. The reaction turntable is rotated in M pitches in one step. Note that M and N do not have any common factor. First and second injecting positions adjacent to each other are established as positions where the reagent pipette can inject a reagent into the reaction container in position.

Abstract: There is disclosed a small-sized automatic biochemical analyzer requiring reduced amounts of reagents. An original sample is transferred to diluting containers on a diluting turntable. The diluted sample is transferred to reaction containers on a reaction turntable and analyzed. The original sample is once diluted. The aliquots of sample are taken from the diluted sample. Thus, a limitation imposed by the minimum volume of liquid that the instrument can meter out can be overcome. Let N be the total number of the diluting containers on the diluting turntable. The turntable is rotated in M pitches at a time. M and N do not have any common factor.