KEYENCE DV-90 - Manual (Page 17)

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1-2 Overview of DV-90 Functions
Preventing Misplacement of Raw Material
Reading the barcodes on a batch instruction sheet and raw material package before adding the raw
material ensures product uniformity.
Use the “Step Verification” function. Refer to 4-17
The barcode data initially read and the data read next are compared, and Match/No match (OK/NG)
is output.
In the above figure, the barcode on the batch sheet is read first, and then the barcode on the material
is read. If they do not match, a lamp or buzzer notifies the operator.
Other uses
• Preventing mixing of chemical bottles on a semiconductor production machine
Checking whether the barcodes on the chemical bottle before replacement and on the new
chemical bottle after replacement prevents potentinally dangerous or damaging mix-ups from
occurring.