Microscan MS-890, User Manual, Page: 285 / 308

MS-890 Industrial Automation Scanner User Manual
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Appendices
Appendix G — Position Scanner and Symbol
In positioning the scanner in relation to the symbols being scanner, consider the following:
• Position the scanner in a place devoid of sunlight, bright lights, or laser light from other
sources.
• Avoid excessive tilt, skew, or pitch. Maximum tilt is determined by symbol characteristics
and the number of decodes required. Maximum skew is ±40° ; maximum pitch is ±50° .
1
• Pitch symbol (or scanner) slightly to avoid specular reflection, the return of direct, non-diffused
light. Specular reflection is avoided by pitching symbols at least 5° plus or minus from a
line perpendicular to the default position of the Raster Bottom and Raster Top .
2
Note: Another way to avoid specular reflection is to skew the scanner slightly in relation
to the symbol.
1. Maximum tilt is determined by symbol characteristics and number of decodes required.
2. The specular reflection zone is a narrow zone straight out from the scanner in which direct reflected light from
a symbol can distort the scanner’s ability to distinguish bars from spaces.
Scanner Position