Chapter 1
Introduction
Bar coding is the most common Automated Data Collection (ADC) technology providing timely, error-free information that can be used to increase productivity, accuracy, and efficiency in the workplace. Virtually every type of industry is using bar codes to replace keyboard data entry. Studies have shown that a proficient data entry operator will make one error for every 300 characters that are manually entered. The error rate using bar codes is almost negligible and can be error-free using bar code symbologies with the check digit enabled.
The Wasp Charged Coupled Device (CCD) technology is a technique whereby a bar code is photographed, digitized, and electronically sampled by built-in photodetectors. The detectors process the measurement of every bar and space using the number of adjacent photodetectors which contrast a black mark and a white space. Wasp WLR 8900 series scanners extremely rugged since they have no moving parts. Wasp WLR 8900 series scanners are support PS/2 or USB keyboard interfaces and easily wedges between the computer and keyboard. Bar code data is passed directly into the keyboard buffer as if it had been typed in by hand by a data entry operator.
Of all the hand held bar code scanning devices on the market, the CCD reader is the easiest to use and most cost effective for the typical business user. The Wasp WLR 8900 series scanners are extended distance scanners with a depth of reading of up to one foot depending on the mil size of the bar code. To activate the scanner, the user simply points the scanning aperture towards the bar code, pulls the trigger, and aims the red LED beam across the bar code.