At the end of this module, you will be able to:
- Types of readers
- Proper reading of a bar code
- Placing a bar code properly
- Common bar code uses
The following key questions are answered in this module:
What are the components of a bar code system?
The bar code system starts with a light source that is directed at the package containing the bar code label. A laser light source is used when the package is expected to be in a certain area. A charge coupled device (CCD) system uses a white light to illuminate an area where the bar code label will be detected.
How does a scanner work and what are the three main types?
The scanner consists of the optical system (also called the reader), the decoder, and the interface to the computer. There are three main types of scanners: handheld wand or pen type, handheld gun type, and a fixed scanner.
What is the decoder component of a bar code system?
The decoder is the electronic circuitry that takes the on/off signals from the detector, recognizes the symbols, determines the characters of the bar code, and sends the information to the computer.
What are some common issues with label quality and contrast?
Common printing problems can cause a bar code to be misread or not read at all. These problems include: too much ink, too little ink, ink smearing, edge roughness, and spots and voids.
Why do we even use bar codes and what's the advantage of doing so?
Bar coding has the advantages of functioning as an automated data collector with accuracy and speed. Information is obtained from the bar code and sent directly to a computer. Bar coding is a mature technology using very accurate and reliable equipment. The bar codes can be read, information sent to a computer, and decisions about products can be made almost instantly.
Below is a transcript of the video sample provided for this module:
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