User manual

Chapter 3
Designing the System
3–7
Figure 3.5
Correct Setup of Scanner
20_-30_
20_-30_
Scanner between 20_ and 30_
above or below the symbol
When using “A” range scanners to read symbols with high paper noise,
increasing the skew to 30° may enhance performance.
To select the correct AtomScan scanner for your application, you must
measure:
• the distance between the scanner and the symbol (which must be within
the Read Range)
• the apparent Narrow Element width. This equals the actual measured
Narrow Element width if the symbol is not pitched. See the section later
in this chapter, Compensating for Pitched Symbols.
• the bar code symbol’s length and height (see Figure 3.1)
• the speed at which the symbol will be travelling
Selecting the Correct
AtomScan Scanner