ISO/IEC Symbol Grade

The ISO/IEC Symbol Grade is the average of the scan grades resulting from scans you take from different paths across the symbol. The ISO/IEC Symbol Grade is also referred to as the overall or final symbol grade. You can obtain a symbol grade only if the passing option test criteria is set to an ISO/IEC grade (not to traditional).

You use the #Scans/Symbol setting to specify the number of individual scan grades that you want the verifier to use to calculate the symbol grade. The available settings are 1 through 10, 12, 15, 20, 30, 50, 100 and Var. The default setting for #Scans/Symbol is 10.

The ISO/IEC standard requires you obtain ten scans of each symbol. For example, you might sample the symbol at ten different places in the symbol — four in the upper portion, two in the middle and four in the lower portion. Multiple scans of the same symbol across different scan paths take advantage of the vertical redundancy of bar codes and give you a more accurate value of the symbol’s overall print quality. The flow chart shown on page 4-3explains how the ISO/IEC Symbol grade is determined.

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Quick Check® 600/800 Series User’s Guide

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Hand Held Products 600, 800 manual ISO/IEC Symbol Grade