Welch Allyn Scanteam 3700PDF Technical Manual
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Welch Allyn Scanteam 3700PDF Technical Manual

Welch Allyn Scanteam 3700PDF Technical Manual

Pdf417 capable ccd reader
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Summary of Contents for Welch Allyn Scanteam 3700PDF

  • Page 1 PDF417 Capable CCD Reader...
  • Page 2 E 1998 Welch Allyn, Inc. All rights reserved.
  • Page 3 Welch Allyn 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 Welch Allyn to determine whether any such changes have been made. The information in this publication does not represent a commitment on the part of Welch Allyn.
  • Page 4 The Lodge, Tanners Lane Warrington, Cheshire WA2 7NA England Welch Allyn shall not be liable for use of our product with equipment (i.e., power supplies, personal computers, etc.) that is not CE marked and does not comply with the Low Voltage Directive.

  • Page 6: Table Of Contents

    ......... . 1–1 SCANTEAM 3700PDF Hardware Description ... .
  • Page 7 ......5–3 SCANTEAM 3700PDF Removal/Replacement ...
  • Page 8 ....B–4 Bar Code Symbol Specifications ... . . B–5 SCANTEAM 3700PDF Interface Cable ..B–6 Printing PDF417 Labels Printing PDF417 Labels for Improved Readability .
  • Page 9 ....3–5 Examples of SCANTEAM 3700PDF Barcode Orientation 3–6 SCANTEAM 3700PDF Pitch, Skew & Tilt Tolerance ..3–7 Specular Reflection Interference .
  • Page 10 This manual is written for users familiar with serial data communications. An understanding of integrated circuitry and bar code technology is recommended. Overview of the Technical Manual Chapter 1 provides a brief description of SCANTEAM 3700PDF software and hardware. Chapter 2 discusses the system’s hardware, including connectors, ports, and power requirements.
  • Page 11 Related Publications Reading Between the Lines: An Introduction to Bar Code Technology Craig K. Harmon and Russ Adams 1989 Helmers Publishing Inc. 174 Concord Street Peterborough, NH 03458 (603) 924–9631 The Bar Code Book: Reading, Printing, and Specification of Bar Code Symbols Roger C.

  • Page 12: Introduction

    SCANTEAM 3700PDF DESCRIPTION Introduction The Welch Allyn SCANTEAM 3700PDF is a fixed mount CCD bar code scanner with integral decoder for easy integration into host equipment. Typical host equipment with bar code requirements satisfied by the SCANTEAM 3700PDF include automated clinical...

  • Page 13: Nonvolatile Memory

    1.2.1 Interface Port The SCANTEAM 3700PDF has one port for I/O and Power. The port is an 8 pin modular female connector. Pin assignments and function descriptions of these features are presented in Appendix B. Cables are available from Welch Allyn for evaluation of the SCANTEAM 3700PDF.

  • Page 14: Pdf417

    Refer to Chapter 4, Programming the Reader or to the SCANTEAM PDF417 Programming Menu for additional information about programming the SCANTEAM 3700PDF scanner. SCANTEAM 3700PDF Description 1–3...
  • Page 15 1–4 SCANTEAM 3700PDF Description...

  • Page 16: Chapter 2 System Hardware Description

    SYSTEM HARDWARE DESCRIPTION Introduction The major components of the system are the SCANTEAM 3700PDF Machine Mount CCD and the host instrument or equipment. Electrical power is generally supplied to the 3700PDF Machine Mount CCD by the host system. Figure 2.1 shows the functional relationships between the components of the basic system.

  • Page 17: General Characteristics Of The 3700Pdf

    General Characteristics of the 3700PDF 2.2.1 Mechanical Layout of the 3700PDF Figure 2.2 shows several views of the SCANTEAM 3700PDF Machine Mount CCD, including general dimensions, the location of connectors, and the scanner window. 3.5” [88.9] Top View 2.9” [73.7] Side View 1.05”...

  • Page 18: Single Modular Input/Output Power Port

    Inserts are molded into the housing to retain mounting screws. Inserts are available for metric (3.5) or SAE (#6–32) screws. Operating Theory Figure 2.3 presents a block diagram of the basic SCANTEAM 3700PDF Machine Mount CCD operation. The SCANTEAM 3700PDF Machine Mount CCD looks for data input from the scanning...

  • Page 19: Scanner/Host Communications

    Scanner/Host Communication The RS–232 communications interface of the 3700PDF is used for entering configuration commands from a PC or host instrument for specific application requirements. The communications I/O port also sends decoded bar code data to the host. 2.4.1 Communications Port The communications port connector for the 3700PDF is an 8–pin female modular socket for interfacing to the host system or other communications device.

  • Page 20: Set-Up And Installation

    SCANTEAM 3700PDF. Damage claims due to handling during shipping should be placed directly with the carrier. Welch Allyn will quote for repair of shipment damage (refer to Chapter 5), but the final claim and negotiations with the carrier are the responsibility of the purchaser.
  • Page 21 Interface cables for evaluating the SCANTEAM 3700PDF are available from Welch Allyn. Welch Allyn also offers 110VAC and 220VAC to 5VDC power supplies for the SCANTEAM 3700PDF. If you wish to construct your own cables, Appendix B lists the SCANTEAM 3700PDF port pin assignments.

  • Page 22: Set-Up Procedure

    Null Modem adapter. Contact your Welch Allyn sales representative or distributor for assistance.) 2) Connect power to the SCANTEAM 3700PDF. The scanner should beep once. 3) Start serial communications software program, such as PCTools Desktop (Central Point Software), on the PC.

  • Page 23: Installation In The Host Instrument

    This completes set–up of the SCANTEAM 3700PDF Machine Mount CCD for evaluation. You are now ready to configure the SCANTEAM 3700PDF to explore the functions and features. Instructions for configuring the SCANTEAM 3700PDF using configuration and operational commands are provided in the SCANTEAM PDF417 Programming Menu.
  • Page 24 1.05” [26.7] Side View Installation should provide adjustment to align the optical center line on the intended target. This adjustment should account for tolerance variation in the SCANTEAM 3700PDF scanner, as well as the host equipment. Mounting Surface .256” [6.5]...
  • Page 25 The SCANTEAM 3700PDF Machine Mount CCD may be oriented in any way (except in specular zone [Figure 3.5]) so that the beam scanning path moves across the bar code as shown in Figure 3.3. Bar code presentation to the scanner is important for successful scanning of the label.

  • Page 26: Scanteam 3700Pdf Pitch, Skew & Tilt Tolerance

    Bar Code Label Rear View = Rotation THE ABOVE DEFINITIONS ARE FROM SPECIFICATIONS Figure 3.4 SCANTEAM 3700PDF Pitch, Skew and Tilt Tolerance –30 Mounting Surface –10 Ç Ç Ç Ç Ç Ç Ç .31” [7.9] Code...
  • Page 27 [cm] Figure 3.6 Scanner Illumination Clearance This completes installation of the SCANTEAM 3700PDF Machine Mount CCD in a host instrument. You are now ready to configure the SCANTEAM 3700PDF for your particular application. Instructions for configuring the SCANTEAM 3700PDF using configuration and operational commands are provided in Chapter 4, Configuring the SCANTEAM 3700PDF.

  • Page 28: Chapter 4 Programming The Scanner

    Programming Menus Note: For additional information on programming the SCANTEAM 3700PDF CCD reader, refer to the SCANTEAM PDF417 Programming Menu. The Programming Menu is used to select the various parameters for reader operation discussed below and includes specific application guidelines for reader programming.

  • Page 29: Retail Symbologies

    The Programming Menu for the SCANTEAM 3700PDF has seven main sections: Table 4.1 Programming Menu Sections Application Options Main Sections Beeper Volume (Low, medium–low, medium–high, high) Beep on Power Up Beep on Good Read Ticking Indicates Scanning Progress (PDF) Humming Indicates Decoder is Busy (PDF) RS–232 Output...

  • Page 30: Scanner Signals And What They Mean

    Note: The time a SCANTEAM 3700PDF unit spends decoding (“humming”) is dependent on the size of the PDF symbol and the error correction level used when the symbol was printed. The more data encoded in a PDF symbol, the longer the time to decode.

  • Page 31: Using The Programming Menus

    Using the Programming Menus The SCANTEAM PDF417 Programming Menu has three components: Menu Selection –– Lists all programming options, by function Bar Code Chart –– Located at the back of the Programming Menu, this section is used to “enter” alphanumeric and Roman numeral data into the programming mode. Information/Examples ––...

  • Page 32: Performing Menu Selections

    4.6.1 Recommended Programming Sequence The SCANTEAM 3700PDF operating parameters can be programmed in any order by moving from one menu page to another. However, since the programming process typically requires numerous scans, it is recommended that you plan and document each configuration command in advance.

  • Page 33: Beeper Attributes

    4.6.2 Beeper Attributes The information below and on the following page summarizes the various programmable “Audio Feedback” options of the SCANTEAM 3700PDF Reader. 4.6.2.1 Volume This programming selection provides control of the reader’s beeper volume. The beeper volume may be set from low to high in four increments. Default = “2,” medium–high.

  • Page 34: Rs-232 Serial Output Options

    4.6.3 RS–232 Serial Output Options The section below provides detailed information on the various programming options for SCANTEAM 3700PDF RS–232 Output. RS-232 parameter changes are affected immediately (i.e., before scanning the EXIT bar code.) 4.6.3.1 Baud Rate This programming selection sets the baud rate from 600 bits per second to 38,400 bits per second.

  • Page 35: Trigger Options

    Whenever the reader has a message to send, it will raise the Request To Send (RTS) line. If the reader has no messages to send, the line will be held low. When the receiver wants to suspend transmission, the Clear to Send (CTS) line will be held low. The reader looks at the state of CTS prior to sending each character.

  • Page 36: Prefix/Suffix Programming

    4.6.4.2 Manual Trigger Enable In manual trigger mode, a TRIGGER ON is required to activate scanning and decoding. In the context of manual trigger mode, TRIGGER ON/OFF are defined as: Trigger On – (A) The trigger pin is grounded (0 volts) or (B) The serial TRIGGER ON command (ASCII 18 decimal) is sent to the reader.

  • Page 37: Hex-Ascii Chart

    Prefix/Suffix Examples: 1. The suffix defaults to a carriage return plus line feed: Bar Code Message <CR> <LF> If no suffix is desired, scan: ENTER, II, EXIT To clear a suffix, scan: ENTER, I, EXIT Where: ENTER (Prefix/Suffix) enters programming mode. II selects suffix programming and clears current suffix.

  • Page 38: Special Characters

    Table 4.5 Special Characters Result Character Insert Code ID The 80 hex will be replaced by a single character identifying the decoded barcode symbology. See the Symbology Chart, facing page. Insert AIM Symbology ID and Modifier The 81 hex will be replaced by a three character string: Where: ] is the symbology ID flag character C is the symbology ID character...
  • Page 39 LRC checking is beneficial in environments where characters received by the host might be corrupted by noise and where the host application will be checking the transmitted LRC character. Communication of characters is susceptible to corruption if a long unshielded cable connects the device to the host, if the highest baud rate is selected, or if a nearby device radiates too much energy.
  • Page 40 Programming Steps Scan the Enter label on the Prefix/Suffix menu page. On Bar Code Chart I, scan Roman Numeral I. On Bar Code Chart III, scan On Bar Code Chart III, scan 02 On Bar Code Chart I, scan Roman Numeral II. On Bar Code Chart III, scan 86.

  • Page 41: Code Selection I (Industrial) Menu Page

    Data will be transmitted to the host as [STX]data[LRC][CR][ETX] 4.6.6 Code Selection I (Industrial) Menu Page The SCANTEAM 3700PDF autodiscriminates between the following Industrial symbologies: Codabar, Code 39, Interleaved 2 of 5, and Code 128. The Code Selection I (Industrial) page of the SCANTEAM PDF417 Programming Menu is used to disable or enable all Industrial symbologies.

  • Page 42: Industrial Symbologies

    ASCII, symbol appendation I 2 of 5 Check digit, check digit (even #’s only) transmission Code 128 None Example: Configure the SCANTEAM 3700PDF to decode the following symbologies: Code 39: Minimum Length = 8 Maximum Length = 14 Start/Stop: Transmit...
  • Page 43 FUNCTION SELECTION VARIABLE Set Start/Stop Characters To Transmit Set Check Char Required To Required Set Check Digit To Transmit Set Full ASCII To enabled Set Minimum Length To 8 Set Maximum Length To 14 Set Code 128 To enabled Set Minimum Length To 6 Set Maximum Length To 12...

  • Page 44: Code Selection Ii (Retail) Menu Page

    Note: If you try this example, the reader will be left operating with these parameters. To return the reader to the default parameters settings, scan ENTER DEFAULT EXIT 4.6.7 Code Selection II (Retail) Menu Page The SCANTEAM 3700/PDF autodiscriminates between the following retail symbologies: UPC and EAN.
  • Page 45 Example: Configure the SCANTEAM 3700PDF to the following retail code symbologies and values: UPC–A will be sent with the following properties: Check Digit Xmit Disabled # System Digit Disabled Read UPC Version E (expanded) 2–digit Addenda Disabled 5–digit Addenda Disabled Refer to the Selections/Variables table on the CODE Selection II (Retail) page of the SCANTEAM PDF417 Programming Menu.

  • Page 46: Code Selection Iii (Stacked) Menu Page

    EXIT 4.6.8 Code Selection III (Stacked) Menu Page The SCANTEAM 3700PDF autodiscriminates the PDF417 symbology. 4.6.8.1 Macro PDF Up to 16 Macro PDF symbols encoding up to 13,000 characters of data can be combined in designated order and transmitted as a single data packet in the PDF417 readers.
  • Page 47 4.6.8.4 One–Pass If this option is enabled, any partial PDF417 scan will be cleared from memory upon a TRIGGER OFF. Normally PDF scans are saved in memory until either a DECODE or a new PDF417 label is scanned. If a new label is detected, the partial data will be cleared, but it is not always possible for the reader to know when a new label is introduced.

  • Page 48: Disable All Symbologies

    4.6.9 Disable All Symbologies Selecting this feature will disable the scanner from decoding any bar code symbologies. This feature would normally be used as part of a programming sequence to enable decoding only on selected symbologies. After selecting this feature, the user would enable the symbology he wants to decode.
  • Page 49 Special Notes: Take care not to confuse the letter O and the number 0. Note also that the DEFAULT code is represented by a period (.) followed by <Ctrl–Y>. ASCII (decimal) values are included on the SERIAL MENU CHARTS (below the corresponding serial command). RS–232 parameter changes are immediately affected.

  • Page 50: Chapter 5 Service/Technical Assistance

    SCANTEAM 3700PDF Machine Mount CCD troubleshooting 5.2.1 Troubleshooting Hints If there is no power to the SCANTEAM 3700PDF Machine Mount CCD, check the following: Host power supply output to the SCANTEAM 3700PDF. Check that the output voltage from the host is +5 VDC. If the voltage isn’t present or is out of range, there may be a problem with power distribution from the host system.

  • Page 51: Troubleshooting Checklist

    3b) Configure the 3700PDF to disable XON. Data message is missing Baud rate, parity, stop bits or data bits is Configure the 3700PDF for the proper or garbled. wrong. communications parameters. Table 5.1 SCANTEAM 3700PDF Troubleshooting Checklist 5–2 Service/Technical Assistance...

  • Page 52: Obtaining Factory Service

    Welch Allyn provides service for all its products through a service center located at its manufacturing facilities in Skaneateles, New York. To obtain warranty or non–warranty service, return the unit to Welch Allyn, Inc. (postage paid) with a copy of the dated purchase record attached.

  • Page 53: Scanteam 3700Pdf Removal/Replacement

    For service in Asia, please contact your Welch Allyn representative (at address below) or your local distributor. Welch Allyn, Hong Kong Office 10/F Tung Sun Commercial Centre 194–200 Lockhart Road Wanchai, Hong Kong Telephone: Int+852–2511–3050 or 2511–3132 Fax: Int+852–2511–3557 Help Desk...

  • Page 54: Ccd Operation And Bar Code Scanning

    Bar code basics and scanning tips. Scanning and Decoding a Bar Code Symbol The body of the SCANTEAM 3700PDF houses all the scanning elements, and decoding/interface elements. Refer to Figure A.1. Reflector...
  • Page 55 The black bars on the symbol absorb the LED light, while the white spaces scatter the LED light. A portion of the scattered light re–enters the scanner’s optical system and is detected by the pixels of the CCD (Charged Coupled Device). The CCD converts the returned light into a sequence of electrical pulses with amplitude proportional to the energy level of the scattered light.

  • Page 56: A.2 Scanteam 3700Pdf Timing Sequence

    Microprocessor The microprocessor controls the generation of timing signals required for the operation of the SCANTEAM 3700PDF device. Additionally it monitors the digital output of the device, configures the operating parameters sent through serial commands (as required), and decodes the scanned bar code data.
  • Page 57 Bar Code Basics and Scanning Tips A Closer Look At Bar Code Symbols The illustration at the right shows a typical bar code symbol. If you look at it closely, you’ll see it is composed of a series of dark lines (bars) and white areas (spaces) of various widths.

  • Page 58: Technical Specifications

    TECHNICAL SPECIFICATIONS Scanner Performance The SCANTEAM 3700PDF performance has been measured in terms of the first bar elongation/contraction and inner bar (space) elongation/contraction when scanning Welch Allyn test targets. If you need more information on these measurements, contact your Welch Allyn representative.
  • Page 59 Focal Distance (selected at time of order) from scanner window: Focal Distance Maximum Scan Width 1.95 inches [50mm] with a 3.5 inch [89mm] maximum scan width MRD (minimum reflective difference): 37.5% Tilt Angle: Controlled by bar code length and height for linear codes (See Figure 3.4) Skew Angle: +30 to –30 degrees (See Figure 3.4)

  • Page 60: Electrical Specifications

    Electrical Specifications Operating Voltage: +5V+5% Operating Current: 260 mA, Power for the SCANTEAM 3700PDF is provided by the host system. Communications Port Connector Pin Assignments: See chart below. 8–Pin Modular Connector Communications Port Signal Function Shield Cord Shield Trigger/Enable Trigger Signal to Decoder...

  • Page 61: Environmental Specifications

    101,000 to 69,000 Pascals (Sea level to 3000 meters) ESD: 15 KV A drain path for ESD should be provided when installing a SCANTEAM 3700PDF in the host system. Shock (Drop Test): Sustains three (3) drops from 4 feet (1.2 meters) to a non–yielding surface...

  • Page 62: Bar Code Symbol Specifications

    Bar Code Symbol Specifications All bar code symbols should satisfy the appropriate AIM Uniform Symbology Specification. Background Substrate The bar code symbol should be printed on material which is reflective and has a matte (not glossy) finish. A background diffuse reflectance of at least 70% to 80% is desirable for optimum contrast.

  • Page 63: Scanteam 3700Pdf Interface Cable

    SCANTEAM 3700PDF Interface Cable Cable part number: 42205204–01 or 42205204–02 (external power required) Caution: Do not substitute any other Welch Allyn serial interface cable. To SCANTEAM 3700PDF To Host System Interface Port Optional connector for external power supply 8 Pin RJ45 Modular...

  • Page 64: C Printing Pdf417 Labels

    Printing PDF417 Labels Printing PDF417 Labels for Improved Readability PDF417 was designed to allow great flexibility in printing, making it possible to print labels to meet a variety of requirements. This appendix describes five label parameters, demonstrates how these parameters affect the printed symbol, and presents suggestions for choosing the parameters for maximum readability.

  • Page 65: Improving Readability

    PDF417 has been designed to allow a small amount of tilt. Welch Allyn PDF417 capable products have been designed to perform well even at high tilt angles. The absolute maximum angle is determined by the X and Y dimensions. At least two codewords must be captured in a single row.

  • Page 66: Suggestions For Maximum Readability

    Error correction levels 7–8 are not recommended since they add a great deal of area to the label. Welch Allyn suggests using error correction levels 3–6, depending on the message size. These levels offer excellent protection from label damage without adding a great deal of area to the label.

  • Page 67: Example Of Pdf417 Printing

    Example of PDF417 Printing Problem: Encode about 544 digits for maximum readability into space 22mm x 72mm. Expect above average label damage. Solution: 1. Choose X Dimension = 0.17mm 6.6 mils 2. Use 30% extra for error correction 554 digits require how many codewords? 554 = 12 groups of 15 PDF417 codewords encodes 12 (44) = 528 digits 26 remaining digits = 8.8 =>...
  • Page 68 For LW =72mm, X = 0.17mm # columns 72mm –71X 72mm –12.07mm =20.73 2.89mm Choose # columns = 20 The true LW = 411X = 69.87mm 4. Finally, choose row height to be as large as space allows. LH = Y (# rows) No quiet zones needed Total number of code- message...
  • Page 69 For LH = 22mm Y = 1.69mm The actual number of digits one can encode in this label is: Total number of code- (# columns) (# rows) = (20) (13) words in matrix Subtract 64 for error correction level 5, 1 for symbol length and 1 more for switch to numeric mode =>...

  • Page 70: Ascii Conversion Table

    ASCII CONVERSION TABLE BIT NUMBERS COLUMN ‘ ” & ’ < – > CONTROL FUNCTION DEFINITIONS Null, or all zeros Device control 1 Start of heading Device control 2 Start of text Device control 3 End of text Device control 4 End of tranmission Negative acknowledge Enquiry...
  • Page 71 D–2 ASCII Conversion Table...

  • Page 72: Glossary

    The transmission of data characters is one at a time. Autodiscriminates– refers to the ability of the SCANTEAM 3700PDF to recognize and decode multiple bar code symbologies. Bar code– is an array of parallel bars and spaces arranged in a predetermined pattern to represent data elements called characters.
  • Page 73 ID can be included in the data preamble or postamble to identify the scanned symbology to the host device. Welch Allyn has a standard set of lower case Code ID’s. These are given in Table 4.2. See also Port ID.
  • Page 74 Digital– (used in contrast to Analog) describes a coded squarewave signal (processed from an analog signal) which is utilized by decoding circuitry. Digital bar code is generally square wave pulses (0 to 5 volts) with widths which depict the bar and space widths in the code.
  • Page 75 Minimum and Maximum Message Lengths– refers to how the various symbologies may be restricted in code length to minimize the chances of misreading a bar code. By setting the message length, the decoder will count the data characters plus any others (start/stop, check digit, etc.) and only accept those bar code reads that fall within the set message length parameters.
  • Page 76 (for scanners), and environmental specifications. Voting– The SCANTEAM 3700PDF decodes and compares consecutive outputs from the scanner; 3 successive reads of the same data are required for a valid read. Voting results is a slightly slower read rate, but will reduce the probability of reading errors when a laser scanner, especially, is being used.
  • Page 77 Glossary–6...
  • Page 78 INDEX Stacked Codes, 4-19 Recommended Programming Sequence, 4-5 AIM Publications, vi Decoder Operation, Block Diagram, 2-3 ASCII Conversion Table, D-1 Decoding, 4-3 Control Function Definitions, D-1 Disable All Symbologies, 4-2 Audio Feedback, 4-3 Electrical Specifications, B-3 Bar Code Basics and Scanning Techniques, A-4 Communication Port Connector Pin Assignments, Bar Code Scanning, A-4 Indicators, B-3...
  • Page 79 Lateral Motion Sensitivity, B-1 Light Source, B-2 MRD (Minimum Reflective Difference), B-2 Identification Label, 3-2 Pitch Angle, B-2 Indicator, 2-3 Pitch/Roll, 3-7 Audible Indicator, 2-3 Scan Rate, B-1 Scan Width, B-1 Installation in Host Instrument, 3-4 See also Evaluation Use; Troubleshooting Guide Scanning Direction, B-1 Skew Angle, B-2 Interface Cable.
  • Page 80 Operating Theory, 2-3 Troubleshooting Checklist, 5-2 Troubleshooting Hints, 5-1 SCANTEAM 3700 Replacement, 5-4 See also Maintenance Serial Menu, 4-2 Programming Menu, 4-5 Service Welch Allyn Product Service Hong Kong, 5-4 Asia, 5-4 Ireland, 5-3 Europe and Great Britain, 5-3 Index–3...
  • Page 81 Index–4...
  • Page 82 Welch Allyn’s published specifications during a period of one (1) year from the time of shipment by Welch Allyn, Inc. to the user or the time it is purchased from any of Welch Allyn Inc.’s Authorized Distributors. Any attempt on the part of the user to disassemble or service the wand, except for tip replacement, shall void the warranty.
  • Page 83 Data Collection Division 4619 Jordan Road P.O. Box 187 3700PDF/TM Rev B Skaneateles Falls, New York 13153–0187...

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