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UPC-A
185
UPC-A
The UPC-A bar code structure is shown in Figure 38 and described on the
following pages.
Figure 38
. UPC-A Structure
QUIET
ZONE
CHECK
DIGIT
LEFT
DATA
FIELD
CENTER CODE
RIGHT
DATA
FIELD
QUIET
ZONE
STOP CODE
QUIET
ZONE
START CODE CENTER CODE
CHECK DIGIT FIELD
STOP CODE
LEFT DATA
FIELD
RIGHT DATA
FIELD
HEIGHT
HEIGHT
QUIET
ZONE
SR, SC
POSITION
FIELD
START CODE
OPTIONAL READABLE
OPTIONAL
READABLE
DATA
FIELD
OPTIONAL
READABLE
DATA
FIELD
QUIET
ZONE
CHECK
DIGIT
RIGHT
DATA
FIELD
LEFT
DATA
FIELD
QUIET
ZONE
HEIGHT
FIELD
QUIET
ZONE
STOP CODE CENTER
NUMBER SYSTEM
START CODE
RIGHT DATA
FIELD
LEFT DATA
FIELD
HEIGHT
QUIET
ZONE
SR, SC
2- or 5-
DIGIT
ADD-ON
CODE
POSITION
SR, SC
POSITION
NUMBER
SYSTEM
CHARACTER
N
CHECK
DIGIT
CHARACTER
C
C
CHECK DIGIT
CHARACTER
N
NUMBER
SYSTEM
CHARACTER
NUMBER
SYSTEM
CHARACTER
FIELD
C
CHECK
DIGIT
CHARACTER
N
NUMBER
SYSTEM
CHARACTER
START CODE
SR, SC
POSITION
STOP CODE
CENTER
CODE
N
NUMBER SYSTEM
CHARACTER
CODE
C
CHECK DIGIT
CHARACTER
NUMBER SYSTEM
CHARACTER FIELD
2- or 5-
DIGIT
ADD-ON
CODE
DATA FIELD
2- or 5-
DIGIT
ADD-ON
CODE
2- or 5-
DIGIT
ADD-ON
CODE
Normal
INV
CCW CW
CHECK DIGIT FIELD
CHARACTER FIELD
NUMBER
SYSTEM
CHARACTER
FIELD