2–2
Operational Description
2.3 Scanner Identification Label
The scanner identification label is located on the scanner’s cable. The
identification corresponds to the configuration work sheet description.
(Welch Allyn p/n 16206714)
2.4 Operating Theory
The reading ability of the wand scanner is based on the detection of
reflected illumination from the bars and spaces which form a bar code
symbol.
During a typical scanning operation, the tip of the scanner is moved across
the bar code symbol. Illumination from the LED is focused on the bar
code symbol. This is absorbed by the dark colored bars and reflected by
the lighter background.
The reflected portion re–enters the scanner through the lens where it is
detected by the read sensor photodiode. The photodiode converts this into
a series of analog pulses which are proportional in width to the bars and
spaces in the symbol. These pulses are then digitized and sent to the
microprocessor where they are decoded into the characters represented by
the bar code symbol.
2.5 Factors Affecting Scanning Performance
The following factors influence reading performance and should be
considered when selecting a contact scanner for a particular bar code
application.
2.5.1
Scanner Illumination Source
Wand type scanners are equipped with a visible red (660nm) source.
Summary of Contents for SCANTEAM 2380
Page 1: ...Keyboard Wedge Decoded Out Wand Technical Manual...
Page 2: ......
Page 6: ...Limited Warranty...
Page 20: ...2 6 Operational Description...
Page 24: ...3 4 Set Up and Installation...
Page 48: ...5 6 Maintenance and Troubleshooting...
Page 65: ...Warranty Information i Y Cable Interface Connections 3 2...
Page 66: ......
Page 67: ......
