RJS Inspector D4000 Auto Optic (FIRMWARE version A.05 and Earlier) - Manual (Page 79)

Operator
’
s Guide Appendix K
002-5564 RJS, Minneapolis, MN 72
Start and Stop Characters
Characters typically used at the beginning and end of each bar-code symbol.
Substitution Error
This error can be seen in a mis-encodation, mis-read or human operator error where
characters that were to be entered were substituted with erroneous information.
Substrate
The material (paper, plastic, metal, etc.) upon which a bar-code symbol is “printed” or
reproduced.
Symbol
See Bar-code symbol.
Symbol Contrast (SC)
This parameter grade can be “A,” “B,” “C,” “D” or “F.”
Symbol contrast is the difference in reflectance values of the “lightest” space (including
the quiet zone) and the “darkest” bar of the symbol. The greater the difference, the
higher the grade.
SC = Rmax - Rmin
Symbol Grade
The simple average of all the overall profile grades using the standard weighing
4.0 = A
3.0 = B
2.0 = C
1.0 = D
0.0 = F
The symbol grade may be stated as a decimal or converted to a letter grade. A measuring
aperture number and nominal wavelength are also specified.