HandHeld Entertainment SV Series manual Calibration Hints

Page 117

All of bar code signal not

between yellow lines

Bottom of bar code signal

not “flat”

Figure 3 - Examples of Scan Profile Parameters Out of Range

Calibration Hints

Calibration is used to normalize reflectance calculations to known (and/or traceable) values in absolute units of % reflectance. Calibration affects reflectance calculations only. Calibration does not affect any other calculations or ability to decode a symbol, etc. The scanner gain and offset settings have the major effect on scanning performance. Keeping the scanner signal linear (between the yellow lines as described previously) is very helpful for good decoding, but is CRUCIAL for reflectance measurements. The calibration procedure will not be successful unless the bar code signal is proper.

There may be cases in applications where the material being analyzed requires a scanner gain and offset setting that will not allow calibration with the standard SV calibration symbol. In most cases this is due to a low contrast material (such as brown corrugated) that will make the signal level on the calibration symbol go past the yellow lines. In cases like this there are two basic choices to make:

1.Do not use parameters that involve absolute units of reflectance as fail- ure criteria. These parameters include Symbol Contrast, Overall ISO Grade, PCS, Rmax, and Rmin.

2.If reflectance parameters are required to be analyzed in the application, a calibration symbol can be created from the material being analyzed. Contact Hand Held Products Technical Assistance (see page 9-1) for details.

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Contents User’s Guide Disclaimer Statement of Agency Compliance FCC Class B Compliance StatementCanadian Notice Statement of RoHS Compliance SV Series Use with UL-listed EquipmentLaser Beam Enclosure Description Laser SafetyPage Table of Contents Scanner Setup ISO Parameter Grade Thresholds Technical Specifications Chapter a SV Series Setup Hints Scanning Distance and Angle Introduction Quick Check SV SeriesScanView Software SV Series Model SpecificationsLaser Beam SV100Reset Button ConnectorControl Panel Sync Inputs + 5 VDC Power InputIsolated Sync Input Diagram Envelope Sync Mode Edge Sync ModeOutput Ports Communication Sync CommandsIndicator LEDs 1 Power/Sync LEDSystem Displays Calibration LEDSerial Port Specifications Serial Port ConnectorSerial Port Pin-out Serial Port Transmission FormatPos Chars Parameters + or indicating sign of avg. max. bar Symbology Identifier Table UPC-A Quick Check SV Series User’s Guide ScanView Installation and Setup ScanView Software InstallationSystem Requirements PC Communication Port Setup Software Operation Warnings Setup MenuTitle Bar Screen Display Menu Bar Screen DisplayStatic Codes Mode Select SymbologiesMoving Codes Mode Ladder Mode and Picket Fence ModeAdvanced Menu Support MenuAbout Menu Item All Data Points, Last 64 Data Points Speed Button Bar Screen DisplayZoom Erase Current Session DataSession Mode Transmit SV CommandsSession Mode Notes Modes Of OperationReflectance Profile Mode Analysis ScreensBar Code Analysis Screen Bottom Panel Bar Code Analysis ScreenBar Code Analysis Results for a Previous Bar Code Graph Display AreaRight Panel Reflectance Profile Screen Color CodingReflectance Profile Screen Scanner Setup Scanner Positioning SV Scanner/Verifier Setup Procedure Bar Code Travel DirectionBar Code Travel Speed Considerations Quick Check SV Series User’s Guide Quick Check SV Series User’s Guide Good Reflectance Profile Bad Reflectance Profile Picket Fence DirectionSetting Ladder Mode Scanning Length Using ScanView Software Picket Fence Bar Code Positioning SpecificationsCalibration Ladder DirectionProcedure Adjusting Scanner Gain and Offset Desired Signal Amplitude and Placement Quick Check SV Series User’s Guide Data Match Commands B SV Command LanguageCheck for specific data ~BCa##bc…bbb……mmm……bbb…… etc. up to 32 characters max~ Brnbb .. + Define increment or decrement data check ExamplesDecrementing Examples Incrementing ExamplesRelationship Between ~BC and ~Br Commands Diagnostic Commands DGet the Scan Rate Hardware Configuration Commands H Example return using ScanView~HB# ~HO# Operational Mode Example return using ScanView inputted ~HB5Display the verifier parameters ~HQ# Transmission ModeQuick Check SV Series User’s Guide ~Hdx01nnn Sets scanner gain or offset Label Setup Commands L ~LA## Overall passing grade~LD## Passing percent decode ~LE# ~LFxy Analyze special subsymbology parameters~LL ~LI# Include the specified symbology for a labelQuick Check SV Series User’s Guide ~LQ# Enable or Disable Port Activations by Partial Decodes ~LT# Sync Input Source ~LS## Set minimum number of scans for valid read~LV## Output Interface Mode ~LX# Sync Type~LZ## Set Number of Codes per Label i.e., per sync period ~OS# Set Transmission Data Format Output Mode Selection Commands OOutput Port Setup Commands P ~PBpiiaaabbb Port barcode decision block parametersIDs Analysis Low High Units Parameters Value PCS IDs Description Low Value High Value ~PPpiiaaa Port action parametersPort State PASS/FAIL Parameters Indicator Digit Value ~PR#### Port/LED reset stateIndicator System Control Commands SChecking SV Status with ~HT How to Set Up Single Scan OperationDisable Verification Execute the calibration procedureEnable Verification ~SK# Communication SyncOperation Description Set the number of scans for Software Commanded Read Mode~SN### Raster CheckReset the System ~Sh## Set the high target reflectance value for calibration~Sl## Set the low target reflectance value for calibration Data Transmission Example ~Ssxy Command Example~Stx Program Command Indicator Header Mode 00 ~LV00~Stx Command Example ~St5 Output Interface Modes DescriptionsMode 01 ~LV01 Mode 01 I/O operationMode 01 LED Operation SV Commands Important to Mode Mode 02 I/O operation Mode 02 ~LV02~LV02 Mode 02 LED Operation~LQ0 Mode 03 ~LV03 Mode 12 ~LV12Mode 12 I/O operation ~LV12 Mode 12 LED Operation~LDxx Mode 16 I/O operation Mode 16 ~LV16Mode 16 LED Operation ~LV16~PP801xxx ~PB811xxxyyy Operation Mode 17 ~LV17SV Commands Important for Mode LED Operation~LV17 ~PB815xxx000 Mode 18 ~LV18 LED Operation ~LV18 ~PB806xxx000 Mode 19 ~LV19 ~LV19 ~LDxx Mode 20 ~LV20 ISO Parameter Grade Thresholds Reference Decode Technical Specifications Qcolvsv Series Product SpecificationsParameter Specification Scanning Performance-SV Series Model PowerScanner Options SyncSync Mode Moving Bar Codes SymbologiesOperation Modes OutputsSync Mode Stationary Bar Codes Parameters AnalyzedNo Sync Free Scan Operation Quick Check SV Series User’s Guide Quick Check SV Series User’s Guide Maintenance Maintenance/Customer SupportCleaning Technical AssistanceOnline Technical Assistance For Further Information Product Service and RepairJapan MalaysiaOnline Product Service and Repair Assistance Limited WarrantyQuick Check SV Series User’s Guide Setting the Proper Scan Distance Session Mode Screen Showing the X Dimension Measurement Setting the Proper Scan AngleButton Example of Good Scan Profile Examples of Scan Profile Parameters Out of Range Calibration HintsQuick Check SV Series User’s Guide Page Hand Held Products, Inc