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Inspector Model D4000 Dual mode portable bar code verifier This presentation includes bar code basics 03/10/111.

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Presentation on theme: "Inspector Model D4000 Dual mode portable bar code verifier This presentation includes bar code basics 03/10/111."— Presentation transcript:

1 Inspector Model D4000 Dual mode portable bar code verifier This presentation includes bar code basics 03/10/111

2 We design and manufacture the world's most complete line of bar code verification equipment 03/10/112

3 BAR CODES Are the Worlds Least Expensive and Most Reliable Method of Entering Data Bar codes are increasingly being used in critical applications where there is no backup 03/10/113

4 Bar Code 101 Two basic bar code variables Light/dark Narrow/wide Five basic bar code parameters Layout Ratio or edge-edge Element dimensions/deviations Reflectance/print contrast Spots and voids 03/10/11 4

5 Light / Dark Virtually all bar codes are read using reflected and monochromatic light Diffuse light is scattered randomly Specular Specular light does not scatter (mirror) Scanners sense diffuse light High & low reflectance differentiates elements - bars and spaces 03/10/115

6 Narrow / Wide Elements are different widths Ratio type codes contain two widths Code 39, I 2 of 5, Codabar Edge-edge codes contain four widths Code 128, UPC, EAN, UCC/EAN 128 Width of narrow element = X dimension 03/10/116

7 Layout 1 = human readable 2 = proper size quiet zone 3 = correct data encoded in symbol 03/10/117

8 Ratio 1 = narrow element width 2 = wide element width Ratio = avg. wide element width / avg. narrow element width 2:1 to 3.2:1 normal 03/10/118

9 Element Dimensions / Deviations 1 = narrow element 2 = wide element 3 = element width tolerance 4 = tolerance added to narrow element 5 = tolerance subtracted from wide element 4, 5 not easily recognized as narrow or wide 03/10/119

10 Reflectance / Print Contrast 1 = bar; Low reflectance 2 = space; High reflectance 3 = highest reflectance in symbol, L 4 = lowest reflectance in symbol; D Symbol contrast = L-D PCS = (L-D)/L Scanners must see a significant difference in reflectance for reliable performance 03/10/1110

11 Spots and Voids 1 = bar with void inside 2 = space with spot inside 3 = signal distorted by void 4 = signal distorted by spot 5 = signal with no distortion Distorted signals can result in no read, poor read rate or data error 03/10/1111

12 What Is Verification? A specification or parametric check of a bar code symbol Objective: predict or ensure readability 03/10/1112

13 What Is Scanning? Decoding bar codes Objective: dig data out of noise 03/10/1113

14 Why Not Use A Scanner To Verify? A scanner is designed to read bad codes In open systems bad means different things (all designs are different) Codes do not get better in shipment The better the scanner you use, the less likely it is your customer will be able to read the code 03/10/1114

15 What Types Of Verification Methods Are Available? 03/10/1115

16 Verification Methods Traditional method ANSI method Film master (N/A for D4000) Data validation 03/10/1116

17 Traditional Method Objective; Determine how well the symbol is printed No regard for scanner type Micrometer, optical comparator history Major parameters analyzed; Avg. bar deviation Print contrast signal Absolute element widths (optional) 03/10/1117

18 Traditional Method Major applications; Print setup Less expensive portable models Absolute measurements for high speed systems Augmentation for explaining ANSI method grade values On-line verification strategy 03/10/1118

19 ANSI Method Objective; Predict how well any type of scanner incorporating a particular optical configuration (aperture/wavelength) will read this symbol Overall symbol grade is indicator B/06/660 or 3.2/06/660 03/10/1119

20 ANSI Method All quality parameters derived from scan profile Lowest of parameter grades = overall symbol grade 03/10/1120

21 ANSI Method Most documented and traceable verification method Quality parameters analyzed Symbol contrast Modulation Defects Decodability Reference decode Rmin/Rmax Minimum edge contrast 03/10/1121

22 ANSI Method Multiple scan averaging is recommended This provides more information on area of symbol 03/10/1122

23 ANSI Method Major applications; Most compatible with symbols printed on flat surfaces UPC/EAN and AIM specifications recommend it Method of Choice for large ISO9000 companies (NIST Traceability) Choice for compliance labeling Excellent on-line evaluation process – Can detect any print method failure (traditional!) 03/10/1123

24 Data Validation Ensure proper data format UCC/EAN AI formats HIBC mod 43 check digit Ensure data match for specific content Destination on shipping label Product ID 03/10/1124

25 D4000 Modes of Operation Laser mode ANSI mode Mode set by scanner type installed The modes provide different types of analyses The modes provide different types of pass/fail criteria 03/10/1125

26 D4000 Laser Mode Traditional parameters flag errors Ave. bar deviation Quiet zone Ratio ANSI Decodability can flag error User programmable threshold (B - F) Easy point and shoot 03/10/1126

27 Laser Mode - CR1 Scanner More accurate analyses than original scanner Analyzes wide range of code size including high density codes with 5 mil (.127 mm) X dimension 03/10/1127

28 Laser Mode - CR1 Scanner (Cont.) Scanning instructions on scanner Adjust scan distance so beam width is minimum of twice the width of bar code 2 inch (51 mm) minimum scan distance 03/10/1128

29 D4000 ANSI Mode ANSI overall symbol grade flags errors Fail threshold user programmable (B-F) Ensure proper aperture/wavelength is set Calibration required for reflectance calculations Traditional parameters used for reference Avg. bar deviation is a trend indicator for Decodability 03/10/1129

30 D4000 ANSI MODE (Cont.) Manual scanning Scan 8 - 12 IPS (smooth) Begin and end scan outside of quiet zone Multiple scan average desired Scan in both directions 03/10/1130

31 D4000 Data Validation Mandatory modulo check digits Code 128, UCC/EAN 128, UPC/EAN UCC/EAN data format checks UCC/EAN AI format checks Comparison mode (laser mode only) 03/10/1131

32 D4000 Operation Hints Enter & Select Keys Press ENTER and SELECT at any time simultaneously to enter main menu Except when actively calibrating or printing a scan profile (ANSI mode) Press SELECT to move cursor or change a choice Press ENTER to enable that selection You may scan at any time in any place in the main menu 03/10/1132

33 D4000 Operation Hints Analysis Screens Initial screen indicates pass/fail analysis and decoded data Press SELECT to scroll data LEDs indicate avg. bar deviation Individual screens accessible for detailed analysis information Press ENTER to access detailed screens First screen accessed is remembered Press ENTER to return to initial screen 03/10/1133

34 D4000 Operation Hints Storage Buffer % Full displayed when storage enabled Buffer cleared by pressing ENTER with cursor on % full message 03/10/1134

35 D4000 Operation Hints ANSI Mode Interpretations Ref decode = F on multiple scan average analysis indicates at least one scan failed ref decode (A-F averaged in multiple scan analysis grade) Large (> 35%) defect calculation may indicate a bad quiet zone Decodability set to 00% in a single scan indicates a global threshold failure 03/10/1135

36 World Leader in Quality Assurance and Data Validation of Printed Symbols 03/10/1136

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