Nordic ID RF651 User Manual

Nordic ID RF651 User Manual Manual pdf 35 page image

© 2006 Nordic ID oyRF651 User Manual Version 1 June 200630��APPENDIX A - TroubleshootingIn case of problems encountered during the use of the RF651, please contact your system integrator or your local NordicID dealer.The following Guidelines are to be followed when optimal working distance needs to be determined or if barcode decodingrelated problem is encountered.NOTE: Due to the large variety of symbol sizes, densities, print quality, etc., there is no simple formula to calculate theoptimum symbol distance.1. Measure the maximum and minimum distance at which your symbols can be read.2. Locate the scan engine so that the symbol is near the middle of this range when being scanned.3. Check the near and far range on several symbols. If they are not reasonably consistent there may be a printing qualityproblem that can degrade the performance of your system.4. Center the symbol (left to right) in the scan line whenever possible.5. Position the symbol so that the scan line is as near as possible to perpendicular to the bars and spaces in thesymbol.6. Avoid specular reflection (glare) off the symbol by tilting the top or bottom of the symbol away from the engine. Theexact angle is not critical but should be large enough to allow the reflected scan line to miss the window of the laserengine.7. Check that the window is clean.8. Give the scan engine time to dwell on the symbol for several scans. Poor quality symbols may not read on the firstscan. When first enabled, the scan engine may take two or three scans before it reaches maximum performance.Enable the scan engine before the symbol is presented, if possible.Should you have some more questions or problems, please go to our website: www.nordicid.com. If you cannot find theanswer for your problem there, please contact Technical Support by sending email to support@nordicid.com .