Reading 2D Barcode - Newland NLS-PT30 Series User Manual

Right and wrong way of reading:

Reading 2D barcode

The best reading distance and angle:
A. Adjust the terminal focus lights aiming to the center of 2D barcode.
B. Adjust the reading distance between the terminal with barcode around 5-20 cm.
C. Adjust the reading angle:
 The relative pitch angle (the α) with barcode and terminal is less than 45 degrees (0 is the best)
 The relative skew angle (the γ) with barcode and terminal is less than 45 degrees (5~20 is the best)
 The relative roll angle (the β) with barcode and terminal can be any angles (0~360 degrees).
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