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Quick Check® SV Series User’s Guide A - 1
A
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 +/- .1 mil. All Hand Held Products
calibration symbols have a 10 mil X dimension unless otherwise
specified on the symbol.