| 摘要 |
PROBLEM TO BE SOLVED: To simply and surely detect abnormality, and to predict a life of a replacing component, by measuring an absorbance using a colored substance after absorbance measurement using pure water to determine that a data trouble exists in any side out of a photometric system and a dispensing system. SOLUTION: Washing for reaction vessels is started, a fixed amount of water are dispensed into one specified vessel and a plurality of reaction vessels, respectively, to measure absorbances, and measured results are determined as a check (1) and a check (2) respectively. The check (1) is compared with the check (2) to judge whether a cause exists in the reaction vessel or a light source based on an allowance value. Pure water is thereafter dispensed after a fixed amount of colored substance are dispenced from a sample probe into the plural reaction vessels (group A) after washing. The fixed amounts of the colored substance and pure water are delivered at the same time into another reaction vessels (group B) with no sample dispensed, using a reagent probe. Absorbance- measured values of the groups A, B are determined as checks (4), (5), and the checks (4), (5) are compared each other to judge whether a cause exists in deterioration of sampling precision or in a reagent pipetting mechanism.
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