Metrologic Instruments IS4823 - Manual (Page 36)

32
Bar Code Element Time Calculation
Realization of the full depth of field for all bar codes 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 bar code size at a given distance is shown in Equation 1 (below).
Minimum Element Time = (Element Size / Spot Speed)
Equation 1.
Example:
Bar code 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