Manual Tecnico HL

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    QL 38/08

    HemoLight Plus

    Technical Manual

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    Fresenius Kabi HemoLight Plus QL-38/08 04/2011 Page 2 of 77

    Table of Contents

    1  IMPORTANT INFORMATION ........................................................................................................4 

    1.1  About the Technical Manual ...................................................................................................4 

    1.2 

    Use of the Technical Manual ..................................................................................................4 

    1.2.1  Complementary Documentation .............................................................................................4 1.3  Symbols used in this manual and on the equipment..............................................................5 1.4  Addresses...............................................................................................................................5 

    2  GENERAL EQUIPMENT CHARACTERISTICS ............................................................................6 

    2.1  Electrical Characteristics ........................................................................................................6 2.2  Primary Battery .......................................................................................................................6 2.3

     

    Dimensions .............................................................................................................................6 

    2.4  Classification...........................................................................................................................6 2.5  Environmental Operating Conditions......................................................................................6 2.6

     

    Electromagnetic Compatibility ................................................................................................7 

    2.6.1  Manufacturer’s declaration – electromagnetic emissions.......................................................7 2.6.2

     

    Manufacturer’s declaration – electromagnetic immunity ........................................................7 

    2.6.3  Recommended separation distances between portable and mobile RF communicationsequipment and the HemoLight Plus. ..................................................................................9 

    3  INITIAL STARTUP........................................................................................................................10 

    3.1  The Equipment’s Packaging.................................................................................................10 3.2  Attach the Collection Tray.....................................................................................................10 3.3  Powering the Equipment On.................................................................................................11 3.4

     

    Initial Tests............................................................................................................................12 

    3.5  HemoData NET Start Up......................................................................................................13 3.5.1  System Requirements ..........................................................................................................13 3.5.2  Installing the HemoData NET ...............................................................................................13 

    3.6  Installing the HemoLight Plus data network .........................................................................14 3.6.1

     

    Installation Requirements .....................................................................................................14 

    3.6.2 

    Operational Procedures for the Installation ..........................................................................14 

    3.7  Enabling the network on the HemoData NET ......................................................................16 

    4  REPAIRS AND ADJUSTMENTS .................................................................................................18 

    4.1 

    Opening the Equipment........................................................................................................18 

    4.2  Equipment’s Main Board.......................................................................................................20 4.3  Clamping System..................................................................................................................21 

    4.3.1 

    Removing and Installing the Clamp......................................................................................21 

    4.3.2  Operational Test of the Clamp..............................................................................................21 4.4  Weighting System.................................................................................................................22 

    4.4.1 

    Removing the Homogenization Unit .....................................................................................22 

    4.4.2 

    Installing and Adjusting the Homogenization Unit ................................................................23 

    4.4.3 

    Checking the Adjustments on the Homogenization Unit ......................................................23 

    4.4.4 

    Removing the Load Cell .......................................................................................................24 

    4.4.5  Installing the Load Cell .........................................................................................................24 4.4.6  Calibration of the Weighing System .....................................................................................27 

    4.5  Power Input Socket and Transformer...................................................................................28 4.5.1  Repairing the Power Input Socket and Transformer ............................................................28 

    4.6  Auto Sense Scanner .............................................................................................................31 4.6.1

     

    Programming the Scanner....................................................................................................31 

    4.6.2  Testing the Scanner..............................................................................................................32 4.7  Simulating a Donation Process ............................................................................................33 4.8  The Memory Batteries on the Equipment.............................................................................34 

    4.8.1  How to change the memory batteries:..................................................................................35 

    4.9 

    The Equipments Keyboard ...................................................................................................37 

    4.9.1 

    Keyboard test........................................................................................................................37 

    4.9.2  How to replace the keypad ...................................................................................................37 

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    5  SOFTWARE UPGRADE ON THE HEMOLIGHT PLUS ..............................................................39 

    5.1  Necessary Materials: ............................................................................................................39 5.1.1  How to obtain the TIGER DOWNLOADER: .........................................................................39 

    5.2  Transferring a new software version to the HemoLight Plus................................................39 

    ELECTRICAL DIAGRAMS AND CIRCUIT DESCRIPTION OF THE HEMOLIGHT PLUS.........42 

    6.1 

    Block Diagram ......................................................................................................................42 

    6.2 

    Connector Positions..............................................................................................................43 

    6.3  PCB 01401V06 .....................................................................................................................44 6.3.1  Layout of the Printed Circuit Board PCB 01401V05.............................................................44 6.3.2

     

    DC Power Supplies...............................................................................................................45 

    6.3.3  Primary Battery Circuit..........................................................................................................45 6.3.4  Standby Circuit .....................................................................................................................47 6.3.5

     

    Micro-controlled CPU............................................................................................................48 

    6.3.5.1  Controlling the Keypad and Display Matrix ....................................................................48 6.3.5.2  Driving the Peripherals...................................................................................................48 6.3.5.3  RS232 Serial Interface ...................................................................................................49 6.3.5.4  I2C Serial Interface ........................................................................................................49 6.3.5.5  Analogue Inputs .............................................................................................................50 

    6.3.6 

    The Scale Circuit ..................................................................................................................50 

    6.3.7  The Oscillating Tray Circuit...................................................................................................51 6.3.8  The Clamp Circuit .................................................................................................................51 6.3.9  Electronic Schematics PCB 01401V06 ................................................................................52 

    6.3.9.1  Electronic Schematics for the Power Supplies, Primary Battery Charger,Standby and Memory Batteries ..............................................................................52 

    6.3.9.2 

    Electronic CPU Circuit Schematics................................................................................53 

    6.3.9.3  Electronic Circuit Schematics for the Tray, Clamp and Scale Circuit ............................54 6.4  PCB 01403V02 .....................................................................................................................55 

    6.4.1  Operator Interface.................................................................................................................55 6.4.1.1  Keyboard ........................................................................................................................55 6.4.1.2  Display............................................................................................................................55 

    6.4.2 

    RS232 Serial Communications Interface..............................................................................55 

    6.4.3 

    Printed Circuit Board Layout PCB 01403V02.......................................................................56 

    6.4.4  Electronic Schematics PCB 01403V02 and PCB 01410V01. ..............................................56 6.5  PCB 01410V01 .....................................................................................................................57 6.6  Indicators Interface ...............................................................................................................57 

    6.6.1  Printed Circuit Board Layout PCB 01410V01.......................................................................57 

    7  THE MEMORY CARD READER..................................................................................................58 

    8  ELECTRICAL DIAGRAMS AND CIRCUIT DESCRIPTION OF THE MEMORY CARDREADER .......................................................................................................................................59 

    8.1  PCB 01901V1 .......................................................................................................................59 8.1.1  Memory Card Reader Circuit................................................................................................59 8.1.2  Printed Circuit Board Layout PCB 01901V01.......................................................................60 

    8.1.3 

    Electronic Schematics PCB 01901V01 ................................................................................61 

    9  HEMOLIGHT TRANSPORT CASE..............................................................................................62 

    10  SAFETY END TESTS...................................................................................................................64 

    10.1 

    Leakage Currents Through the Protection Connector..........................................................64 

    10.2  Leakage currents through the cabinet (surface / ground) ....................................................65 10.3  Leakage currents through the cabinet (surface / surface)....................................................66 10.4

     

    Ground Bound Test ..............................................................................................................67 

    11 

    MAINTENANCE CHECKLIST......................................................................................................68 

    12  REPLACEMENT PARTS, TOOLS AND ACCESSORIES LISTS................................................70 

    12.1  List of Replacement Parts only for serial numbers up to 01805108 E-code 000. ................73 

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    Chapter 1: Important Information

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    1 Important Information

    1.1 About the Technical Manual

    This manual technically describes the HemoLight Plusequipment, and receives the following code QL-38/08 -04/2011, indicating that it is in its 8

    th  revision level, dated April

    2011.The numbering and corresponding chapters are respectivelymarked on the headers and footers of the pages.This content may be changed without prior warning and withoutany legal implications to Fresenius Kabi.

    1.2 Use of the Technical Manual

    This manual was developed to be used by service technicianswho have been trained by the manufacturer and haveexperience in mechanical, electrical and electronicmaintenance.The equipment’s usage instructions are to be found in theUsers Manual.

    Adjustments, modifications or repairs to the HemoLight Plusmust only be done by trained personnel and that arerecommended by the manufacturer. Fresenius Kabi and itsdistributors will not be held responsible for any unforeseencircumstances if these recommendations are not complied with.

    Some of the activities described in this technical manual requirethe use of technical measuring equipment and special tools.

    When doing maintenance and the equipment is open, do nottouch any parts that have power applied to it also protect theinternal components as to contact with liquids. If the needarises for the repair or replacement of electronic components,then please observe the use of protection and measuresagainst electrostatic discharges (ESD). Always use thebracelets and/or other anti-static mechanisms.

    1.2.1 Complementary Documentation

    The HemoLight Plus is a part of a blood donation systemmanufactured by Fresenius Kabi. Its technical manual iscomplemented by the “Operating Instructions HemoData NET”as well as the “Operating Instructions HemoLight Plus”.

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    Chapter 1: Important Information

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    1.3 Symbols used in this manual and on the equipment

    When printed in the manual this means importantinformation. When attached to the equipment, this meansthat the accompanying documents must be consulted.

    B Type equipment, without parts that are directly applicableto the patient.

    IPX0 Equipment unprotected as to the penetration of water.

    This symbol indicates areas on the equipment that maycause operator injury due to crushing.

    This label is attached internally on the equipment next to themain grounding protection.

    This equipment may be supplied with a sealed Lead-Acidbattery, which must be sent in for recycling after its workinglife is over.

    This symbol indicates that the equipment is in conformity withthe directive 93/92 of European Community.

    This symbol indicates the temperature limits for storage andtransportation.

    This symbol indicates that the operating instructions should beconsulted.

    1.4 Addresses

    Manufactured by:FRESENIUS HEMOCARE BRASIL LTDA.Rua Roque Gonzáles, 128.06855-690 – Jardim Branca FlorItapecerica da Serra – SP - BrasilCNPJ 49.601.107/0001-84

    European Representative:

    FRESENIUS KABI AGD-61346 Bad HomburgLOCAL SERVICE:

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    Chapter 2: General Equipment Characteristics

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    2 General Equipment Characteristics

    2.1 Electrical Characteristics

    Input Voltage 110-127V~ 220-230V~Input Current 50/60Hz 140mA 70mA

    Input Fuses 2x200mAT

    Secondary Fuse (internal) 1A F

    2.2 Primary Battery

    Brand Model Type Voltage Current Capacity

    Panasonic¹ PV-BP88 Lead-Acid 12V 2.3Ah

    UNICOBA² --------- Lead-Acid 12V 2.3Ah¹ Panasonic is the registered trademark of the Matsushita Electric Co. Ltd.² Provided exclusively by Fresenius

    2.3 Dimensions

    Maximum Values

    Height 196 mm

    Width 270 mm

    Depth 206 mm

    Weight (without batteries) 3200g

    2.4 Classification

    Type of protection against electrical shockClass I Equipment /Equipment InternallyPowered

    Degree of protection against electrical shock TYPE B

    Degree of protection against water penetration IPX0 (without protection)

    Mode of OperationContinuous with anintermittent load

    2.5 Environmental Operating Conditions

    Operating Temperature 10ºC to 40ºC

    Relative Humidity 30% to 70%

    Sea level Up to 2000m

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    2.6 Electromagnetic Compatibility

    2.6.1 Manufacturer’s declaration – electromagnetic emissions

    The HemoLight Plus is intended for use in the electromagnetic environment specified below. Thecostumer or the user of the HemoLight Plus should assure that it is use ins such an environment

    Emissions test Compliance Electromagnetic environment – guidance

    RF emissionsCISPR 11

    Group 1

    The HemoLight Plus uses RF energy only for its internalfunction. Therefore, it RF emissions are very low and areno likely to cause any interference in nearby electronicequipment.

    RF emissionsCISPR 11

    Class A

    Harmonic emissionsIEC 61000-3-2

    Not applicable

    Harmonic emissionsIEC 61000-3-3

    Not applicable

    The HemoLight Plus is suitable for use in allestablishments other than domestic and those directlyconnected to the public low-voltage power supply networkthat supplies buildings use for domestic purposes.

    2.6.2 Manufacturer’s declaration – electromagnetic immunity

    The HemoLight Plus is intended for use in the electromagnetic environment specified below. Thecostumer or the user of the HemoLight Plus should assure that it is use ins such an environment

    Immunity test Immunity test Immunity test Immunity test

    Electrostaticdischarge (ESD)IEC61000-4-2

    ±6 kV contact±8 kV air

    ±6 kV contact±8 kV air

    Floors should be wood, concrete orceramic tile. If floors are covered withsynthetic material, the relative humidity

    should be at least 30%

    Electrical fasttransient/burstIEC 61000-4-4

    ±2 kV for powersupply lines

    ±1 kV forinput/output lines

    ±2 kV for powersupply lines

    Not applicable

    Mains power quality should be that of atypical commercial or hospitalenvironment.

    SurgeIEC61000-4-5

    ±1 kV lines(s) toline(s)

    ±2 kV lines(s) toearth

    0,5kV DM

    0,5kV CM

    Mains power quality should be that of atypical commercial or hospitalenvironment. If user requires operation inpower lines frequently susceptible tosurges, it is recommend that theHemoLight Plus be powered from astabilized unit or its own battery.

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    Voltage dips, shortinterruptions and

    voltage variationson power supplyinput linesIEC 61000-4-11

    95% dip in T)for 0,5 cycle

    40% U T(60% dip in U T)

    for 5 cycles

    70% U T(30% dip in U T)for 25 cycles

    95% dip in T)for 5s 

    95% dip in T)for 0,5 cycle

    40% U T(60% dip in U T)

    for 10 cycles 

    70% U T(30% dip in U T)for 50 cycles 

    95% dip in T)for 5s 

    Mains power quality should be that of atypical commercial or hospital

    environment. If the user requirescontinued operation during powerinterruptions, it is recommended to keepHemoLight Plus to be supplied by its ownexternal battery system.

    Power frequency(50/60 Hz)magnetic field

    IEC 61000-4-8

    3 A/m50Hz 3 A/mfor 3m

    Power frequency magnetic fields shouldbe at levels characteristic of a typicallocation commercial or hospitalenvironment.

    Conducted RFIEC61000-4-6

    Radiated RFIEC61000-4-3

    3 Vrms150kHz to80MHz

    3V/m80Mhz to 2,5GHz

    3V

    3V/m

    Portable and mobile RF communicationsequipment should be used no closer toany part of HemoLight Plus, includingcables, than the recommended separationdistance calculated from the equationapplicable to the frequency of thetransmitter.

    Recommended separation distance (d )

    d  = 1,17√P  (150kHz to 80MHz)

    d  = 1,17√P  (80MHz to 800MHz)

    d  = 2,34√P  (800MHz to 2,5GHz)

    Where P  is the maximum output power inwatts (W) according to the transmittermanufacturer, and d is the recommendedseparation distance in meters (m).

    Field strengths from fixed RF transmitters,as determined by an electromagnetic sitesurvey

    a, should be less than the

    compliance level in each frequency range.b 

    HemoLight Plus may be affected byinterference if installed in the vicinity ofequipments marked with the followingsymbol:

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    NOTE 1 U T is the a.c. mains voltage prior to application of the test level.

    NOTE 2 At 80MHz and 800MHz, the higher frequency range applies.

    NOTE 3 These guidelines may not apply in all situations. Electromagnetic propagation isaffected by absorption and reflection from structures, objects and people.

    a -  Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones

    and land mobile radios, amateur radio, AM and FM radio broadcast cannot be predicted theoreticallywith accuracy. To asses the electromagnetic environment due to fixed RF transmitters, anelectromagnetic site survey should be considered. If the measured field strength in the location inwitch the HemoLight Plus is used exceeds the applicable RF compliance level above, the HemoLightPlus should be observed to verify normal operation. If abnormal performance is observed, additionalmeasures may be necessary, such as re-orienting or relocating the HemoLight Plus

    b -  Over the frequency range 150kHz to 80Mhz, field strength should be less than 3V/m

    2.6.3 Recommended separation distances between portable and mobile RF communications

    equipment and the HemoLight Plus.

    The HemoLight Plus is intended for use in an electromagnetic environment in which radiated RFdisturbances are controlled. The costumer or the user of the HemoLight Plus can help preventelectromagnetic interference by maintaining a minimum distance between portable and mobile RFcommunications equipment (transmitters) and the HemoLight Plus as recommended below, according tothe maximum output power of the communications equipment.

    Separation distance according to frequency of transmitter(m) 

    Rated maximum outputpower of transmitter

    (W)150kHz to 80Mhz

    d  = 1,17√P  80Mhz to 800Mhz 

    d  = 1,17√P  800Mhz to 2,5GHz

    d  = 2,34√P  0,01 0,12 0,12 0,24

    0,1 0,37 0,37 0,651 1,17 1,17 2,34

    10 3,70 3,70 7,40

    100 11,7 11,7 23,4

    For transmitters rated at a maximum output power not listed above, the recommended separation distanced  in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, whereP  is the maximum output power rating of the transmitter in watts (W) according to the transmittermanufacturer.

    NOTE 1 At 80MHz and 800MHz, the separation distance for the higher frequency range applies

    NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by

    absorption and reflection from structures, objects and people.

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    Chapter 3: Initial Startup

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    3.5 HemoData NET Start Up

    3.5.1 System Requirements

    Standard IBM-PC with a Pentium 133Mhz processor or better16 Mb of RAM memory

    SVGA Color MonitorSerial port with an available DB9 connectorCD-ROM 2X UnitMinimum space on the hard drive of approximately 50 MBavailable to install the program. This space must be increasedin accordance with the number of collections.

    Operational System: Windows 9x/Me/NT/2000/XP

    3.5.2 Installing the HemoData NET

    Depending on the operational system version that you areusing, it may be necessary to consult a network administrator toallow the installation for the new software on the workstation.

    •  Insert the CD containing the HemoData NETinstallation in the PC’S CD-ROM drive;

    •  If the installation does not start automatically, thenaccess the CD unit via the Windows Explorer andexecute the SETUP.EXE program.

    •  Confirm the installation steps until it is finalized

    •  Restart the PC

    The following directory structure will be generated:

    To execute the program, use the icon that was created in thedesktop area or do the following Start/Programs/HemoData

    NET/HemoData NET

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    Chapter 3: Initial Startup

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    •  Access the configurations routine. To access theConfiguration Routine on the System it is necessaryafter pressing the RESET key during the initialanimation that the keys 1, 2, 3, 4 are sequentiallypressed (one-by-one) and in this order.

    •  When the mixer requests DATE / Time? Press NO.

    •  Then the display will request the network number. Inputa number between 1 and 32 using the numeric keypadon the mixer. The last keys pressed will be considered,that is, an incorrect value may be corrected "n" numberof times until the ENTER key is pressed.

    The input number will be used by the PC to acknowledge themixer during communications. This number may not berepeated on one self same network. If a number is repeated byaccident then the PC will not acknowledge either one of thepieces of equipment.

    The RS485 data converter cable must beconnected to an available serial port. AnUSB/Serial adapter may be used in case there areno available serial ports.

    The power supply must be connected to a powermains socket.

    All equipment must be connected to the networkvia the data and “Y” cables.

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    3.7 Enabling the network on the HemoData NET

    Start the HemoData NET.To execute a program use the icon on the desktop or do thefollowing Start/Programs/HemoData NET/HemoData NET.

    Login into the system by clicking on theMASTER button.

    Input access code 123and confirm with theOK button.

    Access the Configuration/Groups menu

    Input a name for the group of mixers and confirm with the OKbutton.

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    Access the Configuration/Mixer on Network menu.

    Select a group that ahs been setup

    beforehand in the selection box“Select Group”.

    Select a mixer in the available mixerscolumn and click on the Add button.

    The selected mixer must be one thatahs been numbered beforehand. Thenumber will indicate the mixer’s ID onthe network.

    Input the mixer’s serial number intothe field and confirm with OK.

    Repeat the last two aforementionedsteps for all mixers on the network.

    For help in operating the HemoData NET access the Helpoption on the system or consult the “Operating InstructionsHemoData NET”.

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    Chapter 4: Repairs and Adjustments

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    Release the clips that hold the upperand lower parts of the housingtogether.

    To do this, insert a flat screw driver intothe recesses located on the sides ofthe housing, and carrying out themovement as shown in the picture onthe side.

    Lift the upper part of the housinguntil it is no longer possible to seethe tip of the clamp (2).

    Then tilt the upper section of thehousing as shown in the figure.

    Remove the flat cable (1) from itsconnector on the main board.

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    Chapter 4: Repairs and Adjustments

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    4.3 Clamping System

    4.3.1 Removing and Installing the Clamp

    The clamp is mounted to the bottom of theequipment by means of 3 screws on its base.

    The cables attached to the connector in theillustration are responsible for controlling theclamp’s activation.

    During replacement, be aware that the chamferedsurface on the base of the clamp faces thetransformer. This guarantees the correctpositioning of the clamp.

    4.3.2 Operational Test of the Clamp

    Necessary equipment:

    •  1 x 20 ml disposable syringe,

    •  1 pressure gauge with a scale of up to 2 Bar,

    Opening and Closing.Carry out the “INITIAL TEST” procedures in accordance withitem 3.4 in this manual.

    Closing Effectiveness.

    Setup a system as shown in the figure on theside.

    Power the equipment on.

    Place the clamp on a section of the tubeimmediately after the pressure gauge.

    Start a new donation procedure.

    The clamp should close when the displayshows “PUNCTURE AND ENTER”.When this happens exert pressure on thesyringe until the pressure gauge gives areading of 1 BAR (kgf/cm²).

    To check if the clamp is “sealing” the pipe

    completely insert the end of the pipe into a container with water, and at the moment that the syringe ispressed there must be no bubbles inside the container.

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    Chapter 4: Repairs and Adjustments

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    4.4 Weighting System

    The weighing system is made up of the homogenization unitand the load cell.

    4.4.1 Removing the Homogenization Unit

    Completely loosen the two Allen screws that fastenthe oscillating system onto the load cell.

    Carefully cut the cable ties that hold the wires onthe bottom of the equipment so as not to damagethe insulation on the wires.

    The unit is then loose and may be removed.

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    Chapter 4: Repairs and Adjustments

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    4.4.2 Installing and Adjusting the Homogenization Unit

    Necessary equipment:

    •  Keypad with a Display to adjust the HemoLight Plus(Part number 070187003).

    •  Ruler.

    •  Torque wrench

    Make sure by visually checking that no part of themovement unit touches the protection of the load cell.Attach the homogenization unit to the load cell, bytightening the screws with a force of 6.5 Nm.So that the front face of the driving init remains parallelto the front face of the load cell.

    4.4.3 Checking the Adjustments on the Homogenization Unit

    Necessary equipment:

    •  A set of standard weights that may be combined tomake up loads of 500g and 1000g.

    •  Keypad with a Display to adjust the HemoLight Plus(Part number 070187003).

    Mount the oscillating base and collection tray onto the

    homogenizing unit.

    Access the equipment’s scale module by pressing theSCALE key.

    Make sure that the equipment is calibrated (please seeitem 4.4.6).

    Wait for the scale to zero.

    Place a calibrated weight piece of 500g on the tray, firstin the center and then on the 4 corners, checking thedisplay reading for each condition, this must

    correspond to the standard weight with a maximumdeviation of 2g on all 5 test points.

    Repeat with the 1000g, being that the maximumdeviation may not be more than 3g on all 5 test points.

    If some anomaly is detected then the system must be adjustedagain.

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    Still with the equipment open carry out the “INITIALTEST” procedures according to item 3.4 in this manual.

    To finalize remove the collection tray and oscillatingbase and then fasten the wires with plastic cable ties tothe bottom of the equipment to the positions wherethere are the appropriate mounts.

    4.4.4 Removing the Load Cell

    It is necessary for thehomogenization unit to havealready been removed beforestarting this procedure

    Remove the screws from the load cellsupporting plate with an open ended spanner of10 mm (or a socket spanner).

    Remove the load cell connector from the mainboard.

    Remove the base plate from the bottom of theequipment.

    Loosen the load cell from its base with a 4 mmAllen key.

    Do not hold the unit by its loadcell.

    4.4.5 Installing the Load Cell

    Necessary materials:

    •  Feeler gauge of 0.3mm and 0.6 mm.

    •  Feeler gauge of 0,45 mm and 1.1 mm.

    •  Locking fluid for the screws.

    •  Torque wrench

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    Mount the load cell as shown on the figure on theside.

    Try to correctly position the load cell. The arrowthat is stamped on its body indicates the end thatmust remain free and the displacement direction.

    The gap between the load cell sides and theprotection sides must be checked before thescrews are fully tightened.

    Between the load cell sides and the protection itmust be possible to pass the 0.3mm feeler gauge,but the 0.6 mm feeler gauge must be able to pass.

    The gap at the bottom of the load cell must be checked, to dothis use the 0.45 and 1.1mm feeler gauges. The feeler gauge of0.45 mm must be able to slip between the cell and the plate, butthe 1.1 mm must not be able to slip between the cell and theplate.

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    After the gaps have been checked on the sidesand bottom of the load cell, then the screws mustbe tightened with a force of 10 Nm. For thispurpose use the torque wrench.

    It is possible to check if any part of the protectionis touching the load cell. For this the offset valuemust be checked with only the load cell fixed onthe base, and check it again with protection kitmounted.The read value can’t different. To check, press theREST key and when the alarms stops, press thefollowing keys: PAUSE, CHECK, CLEAR andSTOP.

    Do not hold the unit by the load cell.

    Install the load cell supporting base into the equipment. Do notforget to include the star washers when assembling.

    The wires for the grounding system (green/yellow) coming fromthe transformer and the power mains input must be dulyfastened to the screw as shown in the illustration. The star

    washer is positioned between the metallic plate and the wireterminals.

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    4.4.6 Calibration of the Weighing System

    Necessary equipment:

    •  Set of weight that may be combined to furnish loads of500g and 1000g.

    •  Keypad with Display to adjust the HemoLight Plus incase the option is taken to calibrate the equipmentwhilst it is open (Part number 070187003).

    The calibration routine may be carriedout with the equipment opened or closed.If the option is taken to carry out theprocess with the equipment open, then itwill be necessary to use the auxiliarydisplay and the equipment must bechecked after it is installed in its housing.

    Power the equipment ON.

    Press the SCALE key.Wait for the zero process to finish.

    When the display shows 0 g, place a calibrated weightpiece of 500g on the center of the tray. If the net valueon the display’s readout is greater than 2g than the realvalue, then the calibration potentiometer must beadjusted until the correct value is achieved.

    Remove the weight piece from the tray and pressENTER then wait for the display to show DATE andTIME.

    Press the SCALE key.Wait for the zero process to finish.

    Again place the weight piece onto the tray and check if theadjustment was effective. Repeat this step as many times as isnecessary to obtain the ideal response.

    When the value on the display converges to thestandard weight value (with a variation of ± 2 g),check the system’s behavior with the weightpiece placed at the 4 corners of the tray.

    Replace the standard weight piece with one of1000 g, checking the readout at the center andat all 4 corners. For this position on the scalethe variation may not exceed 3 g.

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    4.5 Power Input Socket and Transformer

    The standard AC input configuration is that of 230 V. In thedrawing the ON / OFF switch (1) is shown, three pole cablesocket (2) and fuses (3).

    Before powering on the HemoLight Plus make sure that thevoltage selector switch at the rear of the equipmentcorresponds to the local mains power supply.

    To select between the voltages and/or replace fuses, removethe fuse holder cover (5) and the fuse holder (4). Turn the fuseholder so that the chosen voltage is shown in the fuse holder

    window (6)

    To switch between the voltages and/or replace fuses, removethe fuse holder cover (5) and the fuse holder (4). Turn the fuseholder so that the chosen voltage is shown in the fuse holderwindow (6).

    4.5.1 Repairing the Power Input Socket and Transformer

    In case it becomes necessary to replace the Power InputSocket and/or Transformer, these must be removed from theequipment’s base.It is necessary to first remove the homogenization unit of each

    load cell. (Please see items 4.4.1 and 4.4.4). The secondarywires from the transformer must be removed from the mainboard.

    The transformer has one no load output rated at 14 ± 1.25 VAC(RMS) when supplied with the rated voltage. To check thiscondition a Multimeter must be employed to meter between theoutput wires (white).

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    In case of replacement the transformer mustbe prepared by soldering the thermostat(outer most gray wire) in series with the zerotap primary coil on the transformer(outermost red wire). Ensuring that the wire join faces the transformer, and as close aspossible. Protect the join with heat shrinksleeving; (use the figure on the side as areference).

    The primary wires that are left over (red,black and gray) must be threaded throughthe leatherette sleeving.

    The grounding wire must be soldered to theincoming power terminal, which is a commonto the housing as well. The solder joint mustbe made perpendicularly to the terminal andbeing threaded through its hole so that it ispossible to fit the wire the wire in the grooveat the bottom of the plastic on the equipment.

    The secondary wires on the transformer(white) must be cut so that they will have150 mm free. The caps on the insulatedspade terminals must be removed andthreaded through each wire. The spadeterminals must be soldered at the ends of thewires and the insulating covers then slippedover for protection.

    The suppression capacitors must besoldered to the power supply socketaccording to the following instructions:

       G  r  a  y

       B   l  a  c

       k

       R  e

       d

       S  e  c  o  n

       d  a  r  y

       W   i  r  e  s  w

       i   t   h

       1   6   0  m  m

       f  r  e  e

       (  c  o  n  s

       i   d  e  r   i  n  g

       t   h  e

      c  o  n  n  e  c

       t  o  r   )

       L  e  a

       t   h  e  r  e

       t   t  e

       S   l  e  e  v

       i  n  g

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    Drill one 3 mm and1 hole of 1.3 mm in the powersocket. The 1.3 mm hole must be made in such amanner that it becomes an extension of the hole in themetallic terminal. It must also be a through hole goingright through the socket.

    Attach the 1st capacitor according to the illustration.

    The legs must be fed through both holes to thesoldered contacts on the socket.

    Bring the 2nd

      capacitor next to the 1st  one using a

    plastic cable tie as shown here on the side;

    Figure 1

    After the capacitors have been placed together theymust be soldered to the terminals. The legs of thecapacitors must receive the “jumpers” and be solderedaccording to the illustration on the right. The leg on theleft hand side must be extended so that the “jumper”

    itself makes a link between terminals 5 and 6 of thepower supply socket.

    Figure 2

    The primary wires are soldered to thePower Input according to the table on theside, as follows.All solder joints are made with the wiregoing through orifice and wrapping aroundthe metallic terminal. Pieces of heat shrink

    must protect the solder joints.

    Wire Power Input

    Black4

    Red5

    Gray7

    Green-Yellow

    The Power / TransformerInput unit must be placed atthe bottom of theequipment as shown in theillustration on the side. Notethat the wires are placed indefined positions.

    Through Hole

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    4.6 Auto Sense Scanner

    4.6.1 Programming the Scanner

    Connect the Scanner to the equipment’s rear panel (DB9).

    Power on the HemoLight Plus.Use the scanner to read all of the codes in the table below(follow the numeric sequence). Audible tones will be emittedafter each reading that is successfully completed.

    These configurations will only operate with the Auto SenseScanner model as sold by HemoCare.

    Reset to Defaults

    Serial Output Mode

    Serial Baud Rate 2400

    LED Power Enable Safe Mode

    Single Scan no Trigger

    Code 39 Enable

    Code 128 Enable

    Code 128 ISBT Enable

    Codabar Enable

    Interleaved 2of5 Enable

    CodaBar Star/Stop Chars Enable

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    4.6.2 Testing the Scanner

    Power on the HemoLight Plus and whilst the equipment isdisplaying DATE and TIME, press the ENTER key.When the equipment asks for the OPERATOR, read the 1stbarcode from the table below and wait for the next field to berequested. Press RESET.

    Whilst the equipment is displaying DATE and TIME, press theENTER key twice. The value displayed must coincide with thevalue show in the third column of the table.Repeat the same procedure for all other bar codes.

    Code 39 TEST8052

    Code 128 Fresenius HemoCare

    Code 128 ISBT =B30010100019102

    CodaBar A40156B

    Interleaved 2of5 12345670

    To eliminate the probability of a reading error from the scanner

    it is recommended that barcodes that have a checksum beused. The checksum is a digit on the barcode; this digit is afunction of the value of the code. Thus there is a relationshipbetween the value of the checksum and the barcode, and ifthere is a failure in the reading then the scanner will not transmitthe value to the mixer, repeating the reading until there is acorrect relationship.E.g. of barcodes that have a checksum: CODE 128, CODEISBT 128, CODABAR.

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    4.7 Simulating a Donation Process

    The purpose of the following test is to check the operation ofthe HemoLight Plus during a donation.

    Necessary equipment:

    •  Dual Bag System containing 500 ml of liquid.

    Procedure:

    •  Transfer all of the liquid to one of the bags and pinchthe tube to prevent a new transfer.

    •  Power the equipment on.

    •  Place the empty bag on the tray.

    •  Press ENTER.

    •  Place the tube in the clamp.

    •  Input random data as to the equipment’s requests, withthe exception of the value of the volume that must bedefined as 450ml.

    T he data requested at the beginning of the collection and theactivation standards of the alarms depend directly on theequipment configuration. Please consult the operation manualto obtain further information.

    •  Once the volume has been confirmed the equipmentwill request the puncturing and a new ENTER.

    •  Suspend the full bag at approximately 40 cm in relationto the oscillating tray.

    •  Press ENTER to release the donation.

    •  The clamp will open and the tray will start itsmovement.

    •  Follow up on the donation progress until the displaygives a reading of approximately 100ml;

    •  At this point block the flow between the bags. After afew moments (according to the configurations) the lowflow alarm should sound and the display must warn onthe “LOW FLOW”.

    •  Release the flow. The alarm should be silenced.

    •  Wait for the end of the donation.

    •  On reaching the volume the display will indicate “ENDOF COLLECTION” and the audible and visual alarmswill be active.

    •  Press RESET.

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    4.8 The Memory Batteries on the Equipment

    To retain all of the collection data during the time that theHemoLight Plus remains disconnected from mains power andwithout its primary battery connected, it is necessary for internalmemory batteries.The memory power supply unit on the HemoLight Plus is madeup of 3 AA alkaline batteries of 1.5V each, set in a compartmenton the bottom of the HemoLight Plus.

    It is recommended that the batteries be removed from theequipment under long periods of inactivity. Under theseconditions the equipment must be reconfigured when it returnsto normal usage.

    When the memory batteries on the HemoLight Plus becomeweak the display on the equipment will display the followingmessage:

    MEMO BATTERY LOW

    These must then be changed immediately with the equipmentstill powered on so as to retain its data.

    I The batteries life expectancy may vary and is influenced by anumber of factors, some of these are:Battery type (alkaline or common).Temperature.Length of time that the HemoLight Plus remains powered on.Whilst the HemoLight Plus remains powered on, either to mainsor to the primary battery, the batteries will not be used, thebatteries will only come into operation when the equipment iscompletely powered off.Therefore the longer that the HemoLight Plus remains poweredon the longer the batteries will last.

    It is possible that after a long period of inactivity, when poweredon, the HemoLight Plus will indicate that the batteries must bechanged.

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    4.8.1 How to change the memory batteries:

    Materials necessary to effect the change.

    •  A Phillips screw driver.

    •  Three new batteries.

    Before inserting the batteries carefully check to see that thereare no signs of leakage, discoloring, deforming or any otheranomaly.

    The change of batteries must be done with the HemoLight Pluspowered on, either with mains power or primary battery, if theequipment is not powered on then the memory’s data and itsconfiguration are lost.

    When changing batteries always use new batteries of the samebrand, never mix them. If only one or two batteries are changedthen there may be the risk of leakage or explosion and thebatteries life expectancy will be shortened.

    Do not use batteries without the insulating protection or with itsprotection damaged, as it may leak liquid, start a fire or causeharm. Even if they have been purchased in this condition do notuse it.

    Carefully insert the batteries as described in this manual. Neverinsert the batteries with its polarity +/- inverted. Never force thebatteries into the compartment.

    Do not insert anything else into the battery compartment other

    than the batteries.

    Power the equipment on. If its power is supplied via the primarybattery, then this must be inserted and if the equipment doesnot power on automatically the RESET key must be pressed.After the opening animation is displayed press the SCALE key.

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    Turn the equipment to gain access to thebattery compartment. On turning theHemoLight Plus do not support the

    equipment on its tray, neither drag or liftthe equipment using the tray.

    With a Phillips screwdriver remove thescrews and open the batterycompartment.

    Remove the exhausted batteries andinsert the new ones, paying carefulattention to the batteries polarity, theposition that the batteries must beinserted is shown in the holder. If there issome question as to polarity, the springin the holder is where the negativeterminal of the battery is placed.

    The screws that were removed will be used to close thecompartment, take care so as not to loose the screws.

    Close the battery compartment using thePhillips screws. Do not excessivelytighten the screws, only sufficiently toclose the battery compartment withoutplay.

    Place the equipment back in its originalposition and press the RESET key, if itspower is supplied by the primary battery.

    The discarded batteries must be recycled. Look for informationat the refuse collection services in your town to get to know theprocedures.

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    4.9 The Equipments Keyboard

    4.9.1 Keyboard test

    Before proceeding to change the keyboard it is recommendedthat its operation be checked. To do this it will be necessary to

    work all of the keys, one at a time.The keyboard test must be carried out whenever maintenanceis done on the HemoLight Plus.

    4.9.2 How to replace the keypad

    •  Open the equipment and remove the flat cable thatconnects the CPU board to the display board.

    •  Release the flat cable from the keyboard’s socket.

    •  Remove the keyboard by pulling on one of its ends.

    •  After removing the keyboard the recessed surface mustbe cleaned so that there are no adhesive residues leftbehind on the cover

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    5 Software Upgrade on the HemoLight Plus

    The HemoLight Plus allows for its software to be updatedwithout the need to change its microcontroller. This processconsists of transferring a new version of the software from thePC to the HemoLight Plus.

    To carry out this transfer it will be necessary to use a programcalled “TIGER DOWNLOADER”, this program is available atthe following site, http://www.wilketechnology.com/ , and is free.

    5.1 Necessary Materials:

    •  Serial crossover DB-9F/DB-9F cable

    •  Personal computer

    •  New version of the HemoLight Plus Software, thissoftware has the following extension “.TGU”.

    •  Software to make the transfer TIGER DOWNLOADER.

    5.1.1 How to obtain the TIGER DOWNLOADER:

    •  Access the site: http://www.wilketechnology.com/ . Onthe initial page access the “downloads” tab

    ( ), which is at the top of the screen.

    •  Click on “BASIC-Tiger™ Lite-Version/Downloader”,within this select the “Downloader, self-install-exe”, thisis the software that must be copied and installed on thePC.

    5.2 Transferring a new software version to the HemoLight Plus

    •  Open the HemoLight Plus housing gaining access to itsmain board.

    •  Place jumpers JP1, JP2 and JP3 on the Main Board tothe PC Mode side.

    •  Reset the HemoLight Plus.

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    •  Connect the Scanner’s input serial cable to the PC’sserial port.

    •  Start the tiger downloader software.

    •  To select the software that is to be recorded onto the

    HemoLight Plus click on the button.

    •  Select the software and click on Open

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    •  The download will start automatically.

    •  When the recording progress bar disappears then the

    recording has been completed.

    •  Return the jumpers to the initial position.

    •  Remove the crossover cable and close the housing.The mixer must be reset.

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    6 Electrical Diagrams and Circuit Description of the HemoLightPlus

    6.1 Block Diagram

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    6.2 Connector Positions

    Indicator Board:

    CN1 – Display board connectorauxiliary/display board.

    Display Board;

    CN1 – Connector RJ11 (network).CN2 – Connector DB9 (Scanner).CN3 – Connector board CPU/ displayboardCN4 – Connector board display/auxiliarydisplay board.CN5 – Audible alarm connectorCN6 – Display.CN7 – Membrane keypad connector.

    CPU Board:

    (FS1 E FS2) – Power input AC ± 12V.CN1 – Connector board CPU/displayboard.CN2 – Primary Battery (BAT1).CN3 – Connector board CPU/ displayboard (Version same as or before01303V02).CN4 – Memory batteries (Bat 2).CN5 – Homogenization motor unit.CN6 – Clamp.

    TP1 – Test point 1 (output of the 7812,U9).TP2 – Test point 2 (output of the 7805,U10).TP3 – Test point 3 (output of the 7809,U11).TP4 – Test point 4 (output of the 7805,U12).TP5 – Test point 5 (output of the 7805,U13).TP6 – Test point 6 (output of the 7809,4).TP7 – Test point 7 (output of the REF 02,

    U8).

    TP8 – Test point 8 (V BAT).TP9 – Test point 9 (display contrast).TP10 – Test point 10 (A/D CONVERTER INPUT). TP11 – Test point 11 (output 7660 - 9VDC).TP12 – Test point 12 (power supply battery).TP13 – Test point 13 (power supply V+).JP1 – Jumper (disables the network when it is set between the Mode and PC pins).JP2 – Jumper (Enables the equipment to receive a new software version when it is set between the Mode andPC pins).JP3 – Jumper (disables the buzzer when it is set between the Mode and PC pins).JP4 – Jumper (board compatibility, when removed from the CPU board compatible with the previous display

    board model).JP5 – Jumper (prevents the equipment going into standby when it is set between the Mode and PC pins).

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    6.3 PCB 01401V06

    6.3.1 Layout of the Printed Circuit Board PCB 01401V05

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    6.3.2 DC Power Supplies

    The HemoLight Plus has stabilized DC power suppliesassembled with linear regulators of the 78XX family (with theexception of the primary battery charging regulator and the A/Dreference converters). The rectifying of the incoming voltage is

    done by bridge rectifier BR1.

    Regulator Supplied Circuit

    U14 (7809) Scale

    U10 (7805) Digital Circuits

    U12 (7805) Scanner

    U11 (7809) Motors

    U13 (7805) Motor Relays

    U9 (7812) General Relay

    U17 (L200) Battery Charger

    U8 (REF 02SMD)

    A/D ReferenceConverters

    6.3.3 Primary Battery Circuit

    The HemoLight Plus is able to operate with power coming from

    a rechargeable lead-acid battery. When fully charged it is ableto work under standalone for approximately 3 hours of effectivecollecting (approximately 15 complete procedures). The batterycompartment is accessible from the side of the equipment.There is only one way to connect and it is impossible to invertthe polarity.If a battery is connected to the equipment and the equipmentitself is connected to a mains outlet with the ON / OFF switch inthe “ON” position, then the battery will be charged. The chargeron the HemoLight Plus takes around 10 hours to fully charge.

    The primary battery is connected in parallel to bridge rectifierBR1. Diodes D11, D87 and D8 prevent the battery supplying

    current to source or even to its charging circuit.

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    Charge the battery before using it for the first time and thenimmediately charge it again after use.

    Never fully discharge the battery. Remove it from thecompartment whenever the equipment is to remain inactive fora long period of time. (The equipment on standby continues to

    consume battery power).

    Do not continue to use the equipment if it indicates that batterycharge level is low. The HemoLight Plus functions will becompromised.

    The batteries have a limit to their charge/discharge cycles. Ifthey do not fully recover their capacity, then their working life isat an end. In this instance it must be replaced with a new one.

    Recharge the battery only with the HemoLight Plus charger orcharges specifically for this purpose.

    Do not try to disassemble the battery. The sulfuric acid maycause injury to the skin and other parts of the body.

    Do not incinerate. The discarded batteries must be recycled.Look for information with the local refuse collection services inyour town to know how to proceed.

    The charging circuit is built with a L200C (U17) regulatormounted so as to supply a controlled voltage and current to thebattery when it is being charged.The regulator limits the maximum charging voltage to 14.5 Voltsand limits the circulating current to 200mA.

    The switching between the battery and mains power is doneautomatically. In the absence of an external power source thesupply of the circuits will be taken over by the battery.

    Whenever the equipment is being supplied by the battery, theyellow indicator LED 4 will light up. A comparator circuit is builtwith an operational amplifier (U16 port D). In the absence of anexternal power source the comparator’s output is set to zerovolt, guaranteeing that the yellow LED lights up.LED LD1 on the indicators board is a bicolor LED which turnsgreen when the battery is being charged and red when thebattery is discharged.

    The comparator built with U15 monitors the current circulatingthrough the charging circuit. If there is a current circulating, pin6 of U15 will be high. Under this condition the bicolor LED willbe green indicating that the battery is being charged.

    If the battery is removed or if the mains power is removed thenthe output of U15 (pin 6) will be low thus preventing LD1 turninggreen.

    The battery’s charging condition is digitally checked from anA/D converter. The input to the A/D converter (pin 39 U2) isconnected to resistor R40. The voltage across R40 represents1/3 of the battery’s voltage. Whenever the battery’s voltage is

    less than the critical (11.7 V) value the processor will notify the

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    operator that the battery must be changed, by presenting amessage on the display.

    Pin 10 on U2 will go high causing LD1 to turn red.

    The current version of the CPU board is compatible with the

    previous display board version, but to be able to use it, it will benecessary to remove jumper JP4, and use the auxiliary displayBoard Cable (234985018).

    NOTE: The ON / OFF switch does not power the equipment offwhen there is a battery connected.

    The disposed batteries must be recycled. Look for informationfrom your local refuse collection services to see how to proceed

    6.3.4 Standby Circuit

    With the intuition of increasing the standalone time of theHemoLight Plus, it will automatically enter the “Standby” modeafter being idle* for 20 seconds. This process is controlled bythe CPU that carries out the powering off process through arelay (K4) with reversible contacts and a double holding coil,the equipment’s general relay. This relay does not need toremain energized after switching. Each of its coils must beenergized individually when necessary. When the SET coilreceives a voltage pulse the relay closes a contact that will beopened again when the RESET coil receives a pulse.

    The CPU detects the absence of an external power sourcethrough the resistor bridge made up of R30, R41 and R36.When this happens and if the equipment is idle then thecontrolling software triggers a timer.If the trigger reaches the programmed time, then processor U2,Tiny Tiger, will signal the relay with a high from its pin 11(Standby). This signal is transferred via operational amplifierU16 PIN 8, polarizing transistor Q4 activating the RESET coilon the relay. The HemoLight Plus is then powered off at thispoint.

    There are two possibilities for powering the equipment onagain. The first, via reconnection to mains power, which will

    switch the general relay through transistor Q3. The secondpossibility is by pressing the RESET switch on the equipment,which will switch the general relay through transistor Q2.

    *The HemoLight Plus is considered idle only when the display is alternating between dateand time.

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    6.3.5 Micro-controlled CPU

    The HemoLight Plus is a micro-controlled homogenizer. Itsoperation is managed through software.All of the CPU’s integrated circuits use TTL technology. PowerSupply = 5Vcc (U10).

    The CPU is made up of 4 different circuits:

    •  Keypad and Display Matrix

    •  Driving Peripherals

    •  Serial Interface

    •  Analogue Inputs

    6.3.5.1 Controlling the Keypad and Display Matrix

    Pins 1, 2, 3, 4, 5, 6, 7, 8, 20, 31, 32, and 33 of the Tiny Tigermicro-controller are used to control the display and keyboardmatrix of the HemoLight Plus.

    Tiny Tiger Pin Outs Function

    1 to 8 Data bus

    20 Keypad sound

    31 Enabling the Keypad

    32 Enabling the Display

    33 Reading or Writing Operation on the Display

    14 Driving the oscillating tray

    15 Driving the Clamp

    16 Alarm LED

    17 Buzzer

    To make up the keypad matrix three integrated circuits areused:Demux TTL Decoder 74LS138 (U5), D Octal TTL Flip Flop74LS373 (U1) and Octal TTL Transceiver 74LS245 (U7).Whenever a key is pressed a line is shorted out with a columnof the keypad matrix generating a binary code interpreted bythe Tiny Tiger data bus.

    The keypad sound is generated by pin 20 of the Tiny Tiger.This pin is always high (5Vcc) keeping transistor Q1 constantlysaturated. When the keypad sound is enabled and a key ispressed then pin 20 goes low 0 Volt, causing the transistor to

    enter into the cut off region and activating the buzzer.The display’s contrast is adjusted by potentiometer R5.

    6.3.5.2 Driving the Peripherals

    The following are considered as peripherals, oscillating basecircuit, clamp and alarms.Pin 14 when high (5Vcc) starts the tray movement.Pin 15 when high opens the clamp, and analogically, the samepin when low closes the clamp.Pins 16 and 17 when high respectively enable the red LEDalarm and buzzer.The red LED and buzzer are connected to the logical inverter

    74LS04 (U4) output ports. This configuration allows for a

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    slightly higher current level than which is supplied by the micro-controller’s pin.The Oscillating Tray and Clamp circuits will be detailed later

    6.3.5.3 RS232 Serial Interface

    The HemoLight Plus has two serial ports. One of them is usedby the Scanner to obtain the data from reading a barcode.The other is used to exchange data with a PC (RS485) whenthe HemoData NET network module is installed.

    Tiny Tiger Pin Outs Function

    23 RS485 TX

    24 RS485 RX

    26 Scanner TX

    27 Scanner LX

    28 RS485 Control Pin

    The scanner communicates with the HemoLight Plus at atransmission rate of 2400 Baud.Pins 26 and 27 of the Tiny Tiger are connected to a DC-DCconverter Max232 (U3). This configuration allows for data withdifferent logic levels other than 5Vcc to be read without theserial port being damaged. (A direct connection to a PC ispossible).

    Pins 23, 24 and 28 of the Tiny Tiger module are connected to aRS485 Transceiver 75176 (U6).The output of the 75176 is made up of a differential pair. Inconfigurations of this type it is possible to build a network where

    all of the equipment that is powered on is identified.Pin 28 of the Tiny Tiger defines the communications direction:High (5Vcc) – HemoLight Plus transmittingLow (0Vcc) – HemoLight Plus receiving dataFor it to work on the network it is necessary to implement aHemoData NET module.The HemoData NET module is made up of a PC (MASTER)and up to 32 HemoLight Plus (SLAVES) all of them connectedto the same differential pair (network).When the network is inactive all of the HemoLight Plus will be ina listening condition. (Pin 28 low). Once the PC sends a pieceof information, the addressed HemoLight Plus enters into atransmission condition (Pin 28 high).

    The network protocol is controlled via software. The initialinformation is sent as 9 Bits and always comes from the PC.Connector RJ11 – 2 active routes – RS485 InterfaceTransmission rate 38400 Baud

    6.3.5.4 I2C Serial Interface

    The HemoLight Plus records the data on the Smart CardMemory through the socket located on the CPU board.Communications between the two is done through the I2Cprotocol, in which the HemoLight Plus is the master and theSmart Card Memory is the slave.

    Pin 18 of the Tiny Tiger is the SDA data pin and pin 13 is theSCL clock.

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    For a piece of data to be recorded it will be necessary for themaster to send a start signal, after this signal has been sent theaddress will follow, and if the data is recorded or read, the datawill follow in sequence. Whenever a piece of data is recorded orread the slave confirms the operation, and then a newoperation may be carried out. So that the data is valid it will be

    necessary for the SCL signal to be high.Pin 19 of the Tiny Tiger, when low will delete the data from theSmart Memory Card Memory.

    6.3.5.5 Analogue Inputs

    The HemoLight Plus uses three analogue inputs to obtainexternal data.

    Analogue channel 0 is pin 37 of the Tiny Tiger. It is a 12 bit A/Dconverter used to obtain the amplified signal from the load cell.The voltage value across this pin will be proportional to theweight placed over the load cell.

    Please consult item 6.3.6 for information on this circuit.

    Analogue channel 1 is pin 40 of the Tiny Tiger (U1). It is also a12 bit analogue converter used to obtain the voltage on thebatteries of the HemoLight Plus. This signal is used to checkthe charge condition of the memory batteries.This circuit is assembled in the following manner:The voltage signal for the batteries goes through a voltage(buffer) made up of a LM324 (U18). This configuration affordsimpedance matching thus preventing that the memory’sbatteries discharge across the A/D converter when theequipment is powered off.

    The input of the third logic channel is pin 39 of the Tiny Tiger(U1). This channel monitors the primary battery voltage, pleaseconsult item 6.3.3.

    6.3.6 The Scale Circuit

    The Scale’s Circuit is made up of the load cell, amplificationcircuit, and A/D pre-converter filter.The load cell is of the “single point” type, 350 Ω  for up to 5Kg.To increase its sensitivity this capacity is reduced by the by theamplifier circuit to 1kg.

    The entire scale circuit is supplied with 9Vcc (U21).The amplifier circuit is an instrumentation amplifier built up of 3op. amps OP07 (U23, U25, U26).The converter 7660 (U24) generates a signal of - 9 V so that isable to obtain a symmetrical power supply for amplification (+ 9V and - 9 V).The amplifier’s gain is changed through potentiometer R53.This potentiometer is used to calibrate the scale and isaccessible to the equipment user.After amplification the signal passes through a high pass filter.This filter is made up of an Op Amp LM324 (U18) a capacitor(C38) and a resistor (R52).At the input to the filter there is a 5V6 Zener diode. It is used to

    limit the output of the amplification stage to this value.

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    6.3.7 The Oscillating Tray Circuit

    The tray movement is carried out by a 9Vcc motor. Wheneverinstructed by the Tiny Tiger, the optocoupler U21 will causerelay K2 to close thus placing the motor into operation.The optocoupler is used to isolate logical circuits (control) of the

    motor circuit.

    6.3.8 The Clamp Circuit

    The clamp circuit basically constitutes of a 9Vcc motor and 3logic ports, with two of them being “AND” 74LS08 gates andone "NOR” 74LS04.

    The operating logic is as follows:The clamp has two end of travel switches. Whenever one ofthem is activated a 0V signal is transmitted to one of the “AND”

    gates.A high signal from pin 15 (Clamp) from the Tiny Tiger causespin 3 of the 74LS08 (U19) to go high causing the optocouplerU20 to close the relay, thus starting the clamp openingmovement.When the clamp reaches its maximum opening, then the end oftravel switch will be activated causing the logic of the “AND”gate to return to 0V at the output and interrupting the motor’soperation in this direction.The motor will make the closing movement when pin 15 on theTiny Tiger is at 0V. This signal undergoes an inversion at the“NOR” 74LS04 (U4) gate causing the same effect as previouslymentioned on the gate.Note that on the circuit, that for each condition, the 9Vccvoltage across the motor is inverted causing the motor to takeup both rotation directions.

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    6.3.9 Electronic Schematics PCB 01401V06

    6.3.9.1 Electronic Schematics for the Power Supplies, Primary Battery Charger,Standby and Memory Batteries

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    6.3.9.2 Electronic CPU Circuit Schematics

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    6.3.9.3 Electronic Circuit Schematics for the Tray, Clamp and Scale Circuit

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    6.4 PCB 01403V02

    6.4.1 Operator Interface

    6.4.1.1 Keyboard

    The keypad on the HemoLight Plus is of the Membrane type.The equipment has a matrix of 24 keys being that only 17 ofthem are being used.The keypad matrix is made up of 3 columns and 8 lines.

    6.4.1.2 Display

    The display is of the LCD type with 2 lines/8 columns, beingthat two of the lines are placed to one side generating an effectof a single line with 16 positions.

    Display Pins Function1 GND

    2 5Vcc

    3 Contrast control

    4 Display reading or writing operation

    5 GND

    6 Display Enable

    7 to 14 Data bus

    15 and 16 N/C

    6.4.2 RS232 Serial Communications Interface

    RS232 Scanner Input: DB9 Connector

    Pin on theDB9

    ConnectorFunction

    3 RX

    2 TX

    5 GND

    1 5Vcc

    RS485 Communications Input: RJ11 Connector

    2 active pathsTransmission Rate 38400 Baud

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    6.4.3 Printed Circuit Board Layout PCB 01403V02.

    6.4.4 Electronic Schematics PCB 01403V02 and PCB 01410V01.

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    6.5 PCB 01410V01

    6.6 Indicators Interface

    The visual indicators are mounted with LED’s.

    LED3, green, indicates that the equipment is powered on, andis always active when the I/O switch on the equipment is in theON position.LED2, red, is the visual alarm for the equipment. Please consultitem 6.3.3.2 and item 6.3.9.There is also a yellow LED4 and one bicolor LED1 thatalternates between the colors green and red.Whenever the battery is supplying power to the equipment,then the yellow indicator will light up. The bicolor LED takes onthe green color when the battery is being charged and redwhen it is discharged.Please consult items 6.4.4, 6.3.9 and 6.3.9.2.

    6.6.1 Printed Circuit Board Layout PCB 01410V01

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    Chapter 7: The Memory Card Reader

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    7 The Memory Card Reader

    The Memory Card Reader is made up of:

    1. A power supply input,9 V DC 50 mA.

    2. RS232 serial input.

    3. RS485 serial output.

    4. Input for the Smart Card Memory.Please check the insertion positionon the Smart Card Memory label.

    It has the following Indicator LEDS:

    1. Green indicates that the Memory CardReader is powered on.

    2. Blue, indicates that the Smart CardMemory has been inserted into theMemory Card Reader.

    3. Red indicates that the data from theSmart Card Memory is being transferredto a PC.

    To open the Memory Card Reader, on the bottom must beloosened.

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    8 Electrical Diagrams and Circuit Description of the MemoryCard Reader

    8.1 PCB 01901V1

    8.1.1 Memory Card Reader Circuit

    It may be used as a converter to use the HemoLight Plus in anetwork or as a Memory Smart Card reader, transferring thedata from the card to the PC.The Memory Card Reader has a RS 485 to RS 232 converterand a RS 485 to I2C converter.For the data on a card to reach the PC it must first be readusing the I2C protocol. The data is read using a PIC 16F628(U6) microprocessor, through pins 8 (SCL) clock signal and pin9 (SDA) data. Pin 8 on the PIC is connected to pin 3 of the

    Smart Card Memory socket and pin 9 on the PIC is connectedto pin 6 of the socket.

    The PIC is connected to a RS 485 Transceiver 751769 (U5),pin 7 on the PIC is connected to pin 1 of the 75176 and pin 6 ofthe PIC is connected to pin 4 of the 75176. And so they areconnected in parallel to the RS 485 network.

    The conversion from RS485 to RS232 takes place throughTransceiver 751769 (U4), which is connected to a DC-DCMax232(U3) converter, pin 1 of the 75176 (RX) is connected topin 11 of the MAX232 and pin 4 of the 75176 (TX) is connectedto pin 9 of the MAX232.

    The converters are bidirectional.

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    8.1.2 Printed Circuit Board Layout PCB 01901V01

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    8.1.3 Electronic Schematics PCB 01901V01

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    Chapter 9: HemoLight Transport Case

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    9 HemoLight Transport Case

    The transport case was designed to protect the equipment fromeventual shocks during transport. But, it is important to considerthat even transported in this manner the HemoLight Plus is still

    a piece of equipment with very sensitive measuring devices,which are subject to damage if poorly handled. The mixer mustalso be handled with the appropriate care even when housed inthe transport case. Drops and knocks must be avoided.

    The transport case was designed to transport the HemoLightPlus and its accessories (scanner and battery), do not transportany foreign object inside the case.

    If the Smart Card Memory is being used, do not close the casewith the card inserted in the HemoLight Plus.

    The transport case does not need preventive maintenance.To clean it, use a soft cloth dampened with 70% alcohol.

    •  To open the case the four catcheson the sides must be unlocked.

    •  The lower bed of the case hasniches to hold the Scanner, batteryand cables. A movable locking

    piece guarantees that theaccessories remain in their placeeven if there is sudden roughmovement.

    •  The bed is supported on a “shockabsorber”, which absorbs part ofthe vertical impacts.

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    •  The case’s cover has an internalbacking, when closed this backing

    holds the HemoLight Plus to thelower bed, preventing the mixerfrom shifting position during itstransportation.

    •  The HemoLight Plus when placed

    in the transport case will sitbetween the four corner pieces onthe lower bed.

    •  The front part of the HemoLightPlus must face the scanner’s“head”.

    •  The transport case may also beused as a collection table. To dothis the cover must be placed withthe opening facing upwards andthe lower bed must then be placedon top of the cover.

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    10 Safety End Tests

    10.1 Lea