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Quick Check 2D Print
Quality Assessment
Applies to the following products:
IT4410, IT4710, IT4600, IT4800, IT4X80
™
User’s Guide
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Disclaimer Hand Held Products, Inc. d/b/a HHP (“HHP”) reserves the right to make changes in specifications and other information contained in this document without prior notice, and the reader should in all cases consult HHP to determine whether any such changes have been made. The information in this publication does not represent a commitment on the part of HHP. HHP shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential da
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Table of Contents Chapter 1 - Introduction User Operation...................................................................... 1-1 Reading Techniques.............................................................. 1-1 Symbology/Parameter Specifics........................................... 1-2 2D PQA Reporting ............................................................... 1-3 Full Report ..................................................................... 1-3 Screening Report..................
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Symbology....................................................................1-19 Useful Row Height .......................................................1-19 X-dimension .................................................................1-20 Chapter 2 - Quick*View Quick*View Demonstration Software Instructions ..............2-1 Setting Up the Imager and the Quick*View Software ...2-1 Installing Quick*View from the Web...................................2-1 Temporary Quick*View Configuration ....
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1 Introduction Two-dimensional Print Quality Assessment (2D PQA), a feature of HHP's image readers, identifies a successfully read symbol and also reports graded mea- surement parameters obtained from the symbol. 2D PQA is not "true" verification in the traditional sense of the word; however it can easily and inexpensively provide test results that you may find useful for 2D bar code symbol print quality process control. This User's Guide explains how to activate HHP's 2D PQA analysis funct
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The hand-held imager has a view finder that projects a bright aiming beam that corresponds to the imager’s horizontal field of view. The aiming beam should be centered over the bar code and positioned horizontally over the code (no tilt, skew, or rotation). If the symbol surface is shiny, the reader may have to be held several degrees below the normal position to avoid specular reflections. 2D Matrix symbol When testing, attempt to minimize as much movement of the imager as pos- sible
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2D PQA Reporting Full Report HHP's 2D PQA reporting can be enabled in two different modes: Full Report or Screening. If you are using Quick*View, you can enable Full Report, a listing of all of a sym- bol's identifying information, measurements, and corresponding grades, by typ- ing the following menu command: 2D_PQA1 or by scanning the following bar code: Full Report Note: With the IT4600/4800/4X80, the PQA report is sent out as a second data/ beep sequence after the bar code data. The repor
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If your imager is in keyboard wedge mode, enable Screening by scanning the following bar codes. Minimum Acceptable Minimum Acceptable Grade = A Grade = B Minimum Acceptable Minimum Acceptable Grade = C Grade = D You can exit both Full Report and Screening modes by either typing the menu command, 2D_PQA0, if you are using Quick*View, or by scanning the following bar code: Exit Identifying Symbol Content To identify content or "format" aspects of a symbol, 2D PQA modes report the less than
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While the details are explained below, this general format includes: the encoded data (the usual output message) in the first line. a banner " >>> PQA from HHP <<<" identifying the start of the 2D PQA report. the symbology, its features, and approximate size. graded print quality parameters in the following lines. In the 2D PQA Screening mode with "A" as the Minimum Acceptable Grade, this same scan would be accompanied by a triple beep and the following output message: This is a repre
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{5} [A] < Row Height = 3.1 X {6} [A] < Useful Row Height = 2.5 X (82% Row) {7} [A] < Data Safety Margin = 100% (0 Erasures & 0 Errors) {8} [B] < Edge Accuracy = 59% {9} [C] < Print Growth = -43% of X where: {1} is always the Encoded Message, the usual data output. In this case "This is a representative PDF417 symbol". {2} is a standard Banner heading that marks the start of the PQA portion of the output. {3} identifies the Symbology, PDF417 (or its derivative COMPOSITE-C), and lists other c
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D if Useful Height >= 1.0 X, else Fotherwise In Screening modes, this parameter is reported as "Useful Row Height is Too Short (1.5X)" when that is the case. {7} lists the Data Safety Margin, which is the ratio of the unused error correc- tion words to the recommended (!) number of such words. Data Safety Mar- gin can exceed 100%, when the ECL is higher than the minimum recommended, or be limited to 50% or lower, even with perfect printing, when the ECL is below minimum. The grade is assig
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In rare instances where neither a valid Start nor Stop pattern is measurable, yet the symbol is somehow read, lines {8} and {9} are replaced by a message to that effect. The message is either: "[F] < Start/Stop Decode Fails" in a Full Report or "Start/Stop Characters are Bad" in a Screening mode. In Screening modes, it often occurs that none of the parameters are below the Minimum Acceptable grade. In this case, the final PQA line becomes: "All Measurements within range". MicroPDF417 The F
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A if Row Height >= 1.5 X, Fotherwise. {6} lists the Data Safety Margin. Because MicroPDF's error correction level is fixed, this parameter is just the "Unused Error Correction" and always between 0 and 100%. {7} lists the Edge Accuracymeasured in multiple scans through the Row Address Patterns. {8} lists the Print Growth measured within the Row Address Patterns. 2D Matrix This section describes 2D PQA outputs for Aztec Code, Data Matrix, QR Code, and MaxiCode. Aztec Code The Full Report fr
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Note: The reported X-dimension is approximate and based upon use of the IT4410LR at 4.7 in (12 cm) (see "Reading Techniques" on page 1-1). If you use different image engines, the X-dimension will vary. If you hold the reader closer than 4.7 in (12 cm), it will have the effect of reporting a larger than true X-dimension. Conversely, if you hold the reader farther away than 4.7 in (12 cm), it will have the effect of reporting a smaller than true X-dimension. Please contact HHP Applicatio
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{7} [A] < Data Safety Margin = 100% {8} [A] < Horizontal Print Growth = +10% of X {9} [A] < Vertical Print Growth = +12% of X {1} is the Encoded Message. {2} is the Banner heading. {3} identifies the Symbology (DATA MATRIX) and lists the symbol's ECC and size. {4} lists the numbers of Data and Check Words, as well as the error correction used. {5} presents an approximate X-dimension. Note: The reported X-dimension is approximate and based upon use of the IT4410LR at 4.7 in (12 cm) (see "Readi
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{3} QR CODE: Model 2 Version 3 (29 x 29 modules) {4} Mask Pattern Reference #3, Error Correction Level "M" {5} Data Field: 44 data & 26 checks in 1 block(s) of GF(256) {6} X roughly = 0.025" {7} [A] < Data Safety Margin = 100% {8} [A] < Horizontal Print Growth = +20% of X {9} [A] < Vertical Print Growth = +17% of X {1} is the Encoded Message. {2} is the Banner heading. {3} identifies the Symbology (QR CODE) and lists the symbol's model, version and size. {4} lists this symbol's Mask Pattern a
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{4} X roughly = 0.043" {5} [A] < Data Safety Margin = 100% {6} [A] < Horizontal Print Growth = +2% of X {7} [A] < Vertical Print Growth = -1% of X {1} is the Encoded Message. {2} is the Banner heading. {3} identifies the Symbology (MAXICODE) and lists the symbol's Mode. {4} presents an approximate X-dimension. Note: The reported X-dimension is approximate and based upon use of the IT4410LR at 4.7 in (12 cm) (see "Reading Techniques" on page 1-1). If you use different image engines, the X-dime
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{7} [A] (Ok) < Bar Widths = 0.022 in. {8} [A] (Ok) < Inter-Bar Gaps = 0.023 in. {1} is the Encoded Message. {2} is the Banner heading. {3} identifies the Symbology, (POSTNET or PLANET Code), and lists also the symbol's size and allowed range of measured width. {4} lists the Bar Sequence, "1" representing a tall bar and "0" representing a short one. {5} lists the Average Height of the tall bars, specified to fall within 0.115 to 0.125 in. The grades are assigned as: A if within the middle 67%
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4-State Codes The Full Report from a typical scan looks like the following (line numbers have been added in curly brackets): {1} B15AJ6T {2} >>> PQA from HHP <<< {3} 4-STATE(British): 34 Bars, nominally from 38.5 to 42.3 mm. in Width {4} Bar Sequence: ADHTATDAHDDAADADAADTHTADHHDATHTADH {5} [A] (Ok) < "Tall" Bar Extensions: 2.79 mm. from cen- ter {6} [F] (Hi) < "Short" Bar Extensions: 1.00 mm. from center {7} [B] (Hi) < Bar Widths = 0.60 mm. {8} [A] (Ok) < Inter-Bar Gaps = 0.59 mm. {1} is the
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Note: For the Canadian and Australian 4-State symbologies only, any bar error that has invoked their error correction triggers an additional PQA parameter line: "[F] < One or more Bars are in Error!" in a Full Report or "One or more Bars are in Error!" in a Screening mode. Table 1: Dimensional Tolerances for the Various 4-State Bar Code Symbologies “Tall” Bar “Short” Bar Gap (Space) Bar Widths Extensions Extensions” Widths British 2.16 - 2.92 mm 0.51 - 0.76 mm 0.38 - 0.63 mm 0.50 - 0.87 mm
