Welch Allyn SCANTEAM 2380 WAND Specifications download pdf (Page 54)

A–6

Technical Specifications

Contrast

Background reflectance (that of the substrate on which the codes are

printed) should always provide a good contrast relative to the ink

reflectance (that of the code bars). The difference between the two should

be at least 37.5% at the wavelength used for reading.

Tolerance

The ratio of the widths of bars and spaces in a bar code symbol must

conform to the appropriate AIM bar code specifications and can cause

problems if not correct throughout the bar code. Problems can occur when

bar edges are smeared or rough, or when they exhibit voids.

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Welch Allyn SCANTEAM 2380 WAND Specifications Page 54