2 - 8 Symbol MiniScan MSXX07 Series Integration Guide

Calculating the Usable Scan Length Method

Calculate usable scan length as follows (see Figure 2-8 on page 2-8):
L = 1.8 x (D+d+B) x Tan (A/2)
where:
D = Distance (in inches) from the front edge of the host housing to the bar code.
d = The host housing’s internal optical path from the edge of the housing to the front of the MiniScan scanner.
B = Internal optical path from the scan mirror to the front edge of the MiniScan scanner.
A = Scan angle in degrees.
Figure 2-8
Usable Scan Length Diagram
Table 2-1
Calculation Constants
Constants B A
MS1207FZY (Default Mode) 1.17 42°
MS1207FZY (Alternate Mode) 1.17 30°
MS1207WA 1.17 60°
MS2207 1.53 34°
MS2207VHD 1.53 34°
MS3207 1.93 34°
NOTE Usable scan length determined by this formula, or 90% of scan line at any working distance. This formula
is based on good quality symbols in the center of the working range and length of bar code.
MiniScan
Host System
d D
A
Ba
r
Cod
e
B
1/2 L
1/2 L
L