RJS Inspector D4000 Auto Optic (FIRMWARE version A.06 and Later) - Manual (Page 47)

Operator
’s Guide
Appendix C
002-5564 RJS, Minneapolis, MN 39
RJS Inspector D4000 Analysis Parameters
Edge Determination
This parameter can be graded
“A” or “F.”
When a symbol contains an edge determination failure
(an element does not cross the global threshold) all other
parameters cannot be analyzed.

In the case of an edge determination failure, symbol
contrast calculations are valid.

In the case of an edge determination failure, the
RJS Inspector D4000 will force the Decodability
grade to 00% (an
“F” grade)
.

Other affected grades will be calculated only for
that portion of the symbol which was scanned up to
the point of the edge determination failure.
Reflectance Minimum
This parameter can be graded
“A” or “F.”
The reflectance value of the
“ligh
test
” space must be at
least twice as great as the reflectance value of the
“darkest” bar; otherwise, the grade will be “F.”
Edge Contrast Minimum
This parameter can be graded
“A” or “F.”
Edge contrast is the difference of the reflectance values
of the dark and light components of an edge.
Each element of a bar code has two edges which go
from dark to light. Therefore, each edge has a dark and
light reflectance value component.