Motorola SYMBOL MINISCAN MSXX04 - Manual (Page 39)

Installation 2 - 15
Embedded Window Angle and Position
If a window is placed between the MiniScan and the item to be scanned, observe the following guidelines:
• Window Clear Opening - Make the clear opening of the window large enough so that the entire scan beam
passes through the window. Cutting off any part of the beam can result in internal reflections and degrade
decode range performance. Ensure that window placement relative to the MiniScan accounts for tolerances
on all parts involved in that assembly.
• Window Angle - Angle the window at least 2
o
more than the tilt of the window on the scanner (see Table
2-5 ). Further tilting the window is acceptable and decreases the possibility of a secondary reflection from that
window degrading the scanner's performance.
• Optical Working Range - Adding a window can reduce the working range of the scanner since there is a
signal loss when passing through window material. To minimize this reduction, use a special coating
described in
Window Coatings on page 2-14 . To understand the difference, test the scanner in the desired
orientation and see if the difference affects scanner performance.
Table 2-5 Secondary Window Angles
MiniScan Model
MiniScan Exit Window Angle
from Vertical
Minimum Secondary Window
Angle from Vertical
MS954
28
o
30
o
MS1204FZY, MS2204, MS2204VHD
30
o
32
o
MS3204
35
o
37
o