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SV Series Setup Hints - Scanning
Distance and Angle
Introduction
The Hand Held Products SV Series of Scanner/Verifiers requires a fixed scanning distance and angle for maximum verification analysis accuracy. This is similar to the requirement of a wand "guide" on a portable bar code verifier to ensure the optics is placed at a consistent angle. If the "guide" is not placed properly, analysis results will become inaccurate, although the bar code will still be decoded.
This section is intended to provide some hints to help make the basic scanning setup as easy and quick as possible in order to allow more time to concentrate on the application portion of the installation.
This section is written with the assumption that Hand Held Products ScanView software is being used as the setup tool. A null modem serial communication cable is required to interface the PC to an SV unit during the setup process. An appropriate power / interface cable must also be connected in order to operate the SV unit.
Setting the Proper Scan Distance
A proper and fixed scan distance is required to make sure the laser beam is in focus, therefore providing the correct optical resolution for the particular SV model. The specified scan distance is indicated on a label on the side of each unit.
The SV Series' feature of being able to measure a bar code's X dimension makes it convenient for setting up scan distance. In the manufacturing process each SV unit is programmed to accurately measure the X dimension when scanning at the optimum distance. Therefore, if the analysis of a bar code with a known X dimension indicates an accurate result, the scanner is set to the proper scan distance. Below are some basic steps to set the proper scan distance using the X dimension as the adjustment factor:
1.Place the SV Calibration symbol (supplied with each SV unit) in the laser beam.
2.Roughly adjust the scan distance so the READ led is on.
3.Press the SPACE bar in ScanView to get an analysis of the code.
4.Adjust scan distance until the X dimension matches the calibration symbol's X dimension within
Quick Check® SV Series User’s Guide | A - 1 |
