Rjs Inspector D4000 Auto Optic (FIRMWARE version A.06 Instrukcja Użytkownika Pobierz pdf (Strona 61)

Operator’s Guide Appendix F

002-5564 RJS, Minneapolis, MN

Appendix F (Magnifications)

UPC/EAN Magnifications & Bar Width Deviations

UPC and EAN symbols have fixed lengths and formats;

therefore, the only way to change their sizes is to magni-

fy them. Specifications relative to bar/space tolerances

are published for 80% to 200% magnifications.

While the RJS Inspector D4000 does not measure the

bars and spaces to derive a magnification, it does

determine the relative sizes of the elements and there-

fore the bar width deviations.

When UPC and EAN symbols are analyzed, the approx-

imate symbol magnification must be known in order to

most accurately determine if the symbol is within toler-

ance.

For example, if a range of 90 - 115% magnification is

selected and a 200% symbol is analyzed, there will be a

greater chance of a warning message for the symbol

(despite its being within specification) because of the

stricter tolerances of a smaller symbol.

Conversely, if a range of 151% - 200% magnification is

selected and a 100% symbol is analyzed, there will be a

greater chance of an acceptance message for the

symbol (despite its possibly not being within specifica-

tion) because of the larger tolerances of a larger symbol.

Note:

Magnification choices affect only the traditional bar width

deviation analysis.

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Rjs Inspector D4000 Auto Optic (FIRMWARE version A.06 Instrukcja Użytkownika Strona 61