Omron V520-LHA7127 - Section 3 Positioning the Scanner; Achieving Optimum Performance

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Section 3 - Positioning the Scanner
V520-LHA7127
Section 3
Positioning the Scanner
Achieving Optimum Performance
Three items greatly impact performance:
• Distance (from the scan window) to the bar code
• Spectral reflection
• Quality of Bar Code labels
1) Distance to the Bar Code
The operation of the scanner is similar to a camera. If you photograph an object that is out of focus, the
resulting picture will be blurry. The same is true with the scanner. If the bar code label is out of focus, the
scanner may have difficulty decoding what appears to be fuzzy bars and spaces.
Focal Distance
Ideally, the distance from the window of the scanner to the bar code label should be equal to the focal distance
of the scanner. For the V520-LHA7127 series fixed position scanners, the nominal focal distance is:
Front view 1.4 in. (35 mm)