The apparatus has an optical unit for optically reading the article barcode provided to the article. The controller sets operation standard as the reference for occurrence of barcode reading errors, on the basis of individual operator setting information depending on personal features (rhythm, habitual manner, etc.) of operators engaged in operation of reading barcodes. The controller also monitors whether the operation relating to the operator conforms to the operation standard or not.

 
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> Optical interlink between an optical transducer and optical data port

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