Opticon LMD 1135 user manual Measuring Scanner Performance, Quality Bar Code Labels

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Manual No. 25-ULPNR102-01; Mar, 2005

LMD 1135 Laser Fixed Mount Scanner

3) Quality Bar Code Labels

The quality of the bar code label can affect the scanning performance. Poor quality labels are more difficult to decode and may result in non-reads or potential misreads. The bar code label should be printed to specifications. This means that the bars are printed within spec, with the correct widths, no ink spread, crisps edges and no voids. There should be a sufficient quiet zone on both end of the bar code label. For best results, the paper or label stock should have a matte finish to diffuse light. The print contrast signal (which is a comparison of the reflectance of the bars and the background stock) should be as high as practical.

Measuring Scanner Performance

A method for properly positioning the unit is to program the scanner for Trigger Disable (S7) and Continuous Read (S2) modes. The scanner will be always on and will continuously read the same bar code. Since the buzzer sounds each time the bar code is read, the sound of the buzzer can be used like a “Geiger counter”. As the position of the scanner changes the sound of the buzzer will change. The buzzer sound will be loudest and most continuous at the best reading position.

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Contents Manual No -ULPNR102-01 March OSE Command Set User’s ManualPage Contents Scanner Servicing and Maintenance Technical SpecificationsConfiguring the Scanner Introduction and Getting StartedProduct Overview Quick Start-Up ProcedureSection Introduction and Getting Started Page Optical Specifications Section Technical SpecificationsPhysical Specifications Avoid specular reflection in the dead zone +/- 8 degrees Electrical Specifications JAN 13 R = 30 mm 1.2 orRS232 Signal Level RS232 Communications SpecificationsConnector Pin-outs RS232 Transmit / Receive Character FormatOrdering Information Environmental SpecificationsPin No Signal ModelDistance to the Bar Code Section Positioning the Scanner for Optimum PerformanceAchieving Optimum Performance Depth-of-FieldAvoiding Specular Reflection Distance Max From Window WidthMeasuring Scanner Performance Quality Bar Code LabelsApplication Notes Tips for Achieving High Throughput Tips for Insuring Highest Data IntegrityTips for Verifying the Presence of a Bar Code Default Settings Section Configuring the ScannerProgramming Menus & Commands Parameter Factory Default SettingCommon Causes of Poor Performance Section Application Engineering SupportTechnical Assistance and Support Modified and/or Customized ScannersIEC 825-1 Class 1 Laser Device Section Scanner Servicing and MaintenanceSection Scanner Labeling Appendices ESC Computer Command CR Appendix aReset All Defaults U2 Command U2 What if you make a mistake?Options for UPC Global DefaultsSymbology Selection Options for EAN-8 & EAN-13Options for Code Prefix/Suffix of Numeric Characters Select Symbology forPrefix/Suffix Prefix/Suffix of Alpha CharactersParallel Read Mode Setting the Trigger & Auto-TriggerSelecting the Read Mode HandshakingMode Scanner Timeout Trigger EnabledXmit Error Trigger Enabled Mode only Quiet Zone OptionsAppendix C Computer Global Default & Scanner ConfigurationsCommand Description Including prefix/suffixSymbologies Symbology SelectionDescription Command Bar CodeOnly EAN 13/8 +2 Add/Activate Specific Bar Code Symbologies START/ENDDisable all symbologies Delete/Deactivate Specific Bar Code SymbologiesAdd/Activate Specific Bar Code Symbologies Bar Code Command Description Options for UPCOptions for EAN-8 & EAN-13 Options for Code 39 & IT Pharmaceutical IT Pharmaceutical, enable Transmit of leading a Options for Codabar NW-7 Codabar NW-7 Format Options for Interleaved & Industrial 2 5 Format Standard and InterleavedMeaning of Acronym Options for IataString format Number of digits 15 totalOptions for Code-128 / EAN-128 Options for Code-93Disable fixed length all Fixing the Number of DigitsCreating a Prefix and/or Suffix Setting Prefixes Identifying the Symbology UPC-E +2 or +5MSI/Plessey Setting Suffixes Identifying the Symbology Bar Code Command Description Direct Input of Numeric Characters Direct Input of Alpha Characters Direct Input of Alpha Characters Lower Case ETB Direct Input of Control CharactersSUB Direct Input Characters Misc Bar Code Command Description Code Identification & Characters/Digits Transmitted START/ENDCommunication Parameters Communication Parameters Handshaking TerminalMs intercharacter delay Disable buzzer Buzzer OperationSetting the Trigger & Auto-Trigger Functions Positive & Negative Bar CodesSelecting the Read Mode Trigger Function Enabled S8 Trigger Function Disabled S7Parallel labels only Parallel Read ModeAdd-on Wait Mode Applies to UPC/EAN only Scanner Timeout Trigger Enabled Mode only Multiple Read Reset Time Quiet Zone Options Redundant Decoding Transmitting Error Indications Trigger Enabled only Error Messages No decode / no labelGood Read LED Operation Appendix D Appendix E