Rjs Inspector D4000 Auto Optic (FIRMWARE version A.06 Instrukcja Użytkownika Pobierz pdf (Strona 49)

Operator’s Guide Appendix C

002-5564 RJS, Minneapolis, MN

Defects

This parameter can be graded “A,” “B,” “C,” “D,” or “F.”

Defects are irregularities in bars, spaces and quiet

zones.

For example, a dark spot in a space could cause a low

enough reflectance to be mistaken for a bar, and the

extra bar would cause a decode error.

The defect grade is determined by a relationship be-

tween the largest defect in the symbol and the symbol

contrast (the smaller the defect, the better the grade).

Note:

In general, a small aperture used to analyze very wide

elements will cause the largest defects.

The RJS Inspector D4000 incorporates a feature that

trims reflectance data gathered during a scan to approx-

imately 10 times the X dimension (5X after a UPC/EAN

addendum). These areas, on either side of the bar-

code, are assumed to be quiet zones and are included in

the analysis.

A graphic object or text in the quiet zone will produce

an “F” grade – This indicates a quiet zone that is too

narrow. We recommend that you scan in both directions

to make maximum use of this feature.

Reference Decode

This parameter can be graded “A” or “F.”

If the Reference Decode parameter is “F,” then the

overall symbol grade is also “F” (regardless of the grade

of any other parameter).

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Rjs Inspector D4000 Auto Optic (FIRMWARE version A.06 Instrukcja Użytkownika Strona 49