Read] : The rack ID and barcodes on the sample tubes are read by the sampler barcode reader. [Step] : The [Scan] operation is executed step by step. [Scan] : The rack IDs and barcodes on the sample tubes are read by the sampler barcode reader. The sample rack to be used for this check should be set at standby buffer 1 (position closest to the barcode reader), STAT rack set position, InStocker 1, or InStocker 2. When the sample rack is set at both standby buffer 1 and STAT rack set position, the rack at standby buffer 1 is used for this operation. When the sample rack is set at neither of these positions, the system checks InStocker 1 and InStocker 2 for a rack. If a rack is set at either of them, it is used. The barcode information read by the barcode reader is displayed in the field below the buttons.