Metrologic IS4815 Guia de Instalação descarregar pdf (Página 21)

SCAN SENSE TIMING

Barcode Element Time Calculation

Realization of the full depth of field for all barcodes given in the specification is

based on the ability of the decoding hardware to resolve a varying range of

minimum element times. The minimum element time calculation for a given

barcode size at a given distance is shown in Equation 1(below).

Minimum Element Time = (Element Size / Spot Speed)

Equation 1.

Example:

Barcode Size = 5.2 mil

Spot Speed @ 95 mm from face = 650 inches/second

Minimum Element Time = (0.0052 inches/ (650 inches/second)) = 8.0 µsec

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Metrologic IS4815 Guia de Instalação Página 21