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Quick Check® 600/800 Series User’s Guide
6 - 7
proportional to the amount of light returned. A symbol’s spaces reflect more light
than the bars. As the wand is moved across the bar code symbol, the analog
voltage varies, creating a graphic scan profile. The scan profile is the basis for
verifying the bar code symbol.
Scanner Illumination
It is important to have a uniform velocity when scanning bar code symbols
because the relative widths of the actual bars and spaces are determined by
measuring the time that the electrical signal from the scanner spends at the
voltages that represent either black or white, respectively. The verifier will notify
you if you scan too fast, too slow or unevenly.
Also, severe changes in ambient light may cause misleading scan profile or
reflectance readings. Therefore, it is important to calibrate and use the verifier
in the same general ambient light and, when in use, to minimize variation in the
intensity of the ambient light.
Once collected by the electro-optical components, the data is transmitted to the
computer in the verifier. The verifier assesses the data and determines the
quality parameters.
Additional Information
For additional information on bar code technology, you can refer to the
associations and books listed below.
•
AIM North America -
A chapter organization of AIM, Inc., 125
Warrendale-Bayne Road, Warrendale, PA 15086, Tel: (724) 934
5688, Fax: (724) 934 4495, Email: Mary Lou Bosco,
http://www.aimusa.org/
•
GS1
(formerly UCC and EAN)
Brussels - Blue Tower, Avenue Louise, 326, BE 1050 Brussels
Belgium, Tel: +32 2 788 7800, Fax: +32 2 788 7899
•
GS1 US -
Princeton Pike Corporate Center, 1009 Lenox Drive, Suite
202, Lawrenceville, New Jersey, 08648 USA, Tel: (609) 620 0200,
Fax: (609) 620 1200, E-mail: [email protected],
http://www.gs1us.org
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Страница 120: ...Hand Held Products Inc 700 Visions Drive P O Box 208 Skaneateles Falls NY 13153 0208 QC600 800 UG Rev G 3 07 ...