BIOMIXER BM330 - Ljungberg & Kögel AB
Contents
1. ircuit diagram C SU 99101 yo soi uz m zu PND IND su ve oz AZ fono Xeno m ps ON ip no m 3 a EN diio gt E we ow E zia F nod ma ria 2 fino tat EN m z GLNO OAL IVS via neran ls CALES v SS vo 20 5 PP coxe LP ge 00 dusvot TI feza ll E eo o w 7 S P d 98 t ASZ aw z 1 ES TT Xo sum ze i T pe m E i tal sa Em ze ale 7 1006 ag vo ez 090 sig 1 370 I ro A E KE 4 7222 i 2045 Moy e 7 et r 209 Moo esze z FEES E El su L2 3E i 30705 5 ES a I m H e i 7 a ou Y viuo le Dd e le lo lo lo o uw wd aL se e m kl m axy H mae a2. 08 E El E otal Ln mero iod ITIITIT zo pro ond da ass are um wes m aia nn o ae amp CE Ed w WW du T g g 204 S sazon v Ed sz m 26008 ye ve Lid 201 ES 1 i Da bi E r3 x oe um owt E x bx imo Sida E siv x Tr 1996 os ko le Lu Lo lo La Lo Lo 294 quo 1 mom ag Fa fa e 888 o o E 139 Hansas Hasau nvo L AEST A A AE B Pe nee lle cur 2 H g Sen is E 2 anas sny f z ile ae man Hm ar 10006 XOAMIWONO SRW z A oim n p n Avo 4 E Noe SERE 5 sers XW we e 1 zor won a d d E Le Ea won zo Ns NHS A HOLAS 3WOH OL E sra 3 SE so sr mes O sis lA ES ad um sa gt bo x de us nme d n h 2 E wa nae Sie 1 ergon om dM 7 ES a Cur po we 8080 ws 7S u ae 5 00 i teror zo moso sa o wer reso a M30 o aim M P uo id n rA Wad orod iesxvw P eco 7 een y 934 owe Gau mae E ye Te 5 gt B 1 sau so Um veo Lp isu kar van h 9 150 pi 29 ano LM anoni He FA a vo edo gt Nr 2 ano om 460 S 6 vo T 2 za T Te ER a a aces Xon Pena ss ao xs pod 0094 Bro Tos dni sy Wi ser D m q non A WO EH p Es uno wor 3890009 091 i i NS N N z8 tdi a nee i Pl V8 88 i E ES 8 gt ap UT os g 2 83 004 E r 20 d iT IE gt HA als m muB isu 190 S ss oa r val eu zu Em avu 46508 FR 5 zon sa o la 038 e 02H M nn w ooo veo eot von j vos UM nain E ms vu ge solr N ET C P a x ax
3. BM330 is controlled by an 8 bit microprocessor 8052 with external 64 kbyte prom for program execution and 32kbyte CMOS RAM for data storage The oscillator runs on 11 0592 MHZ a frequency choosen to suit communication bit rate generation by internal timers Data backup Data CMOS RAM have low standby current lt 1uA 3 5V and is together with the RTC back uped by a 0 1F super capacitor C19 The battery switchover circuit IC20 Max 691A automatically switch over to backup capacitor when 5Vcc supply drops below 4 6V During this time IC20 also turns off chip select signal CERAM to avoid accidently writing in RAM during power down IC 20 also senses the battery voltage before the 5V regulator to get an early warning on Pfail output when power is disappearing This PFAIL signal is connected to the highpriority INTO interupt to the CPU Serial synchronous bus SPI A serial bus with SOUT SIN SCLK is used to communicate with the 12 bit A D converter IC5 serial EEPROM IC18 where the setup and calibration parameters are stored the RTC IC19 the electronic potentiometers IC4 for offset adjustments and IC 17 for buzzer volume and finally the optional external display It runs with ca 500kbps clockpulses and each circuit function is selected by the chip select decoder IC6 selecting CSPOT CSEXT CSBIP CSAD CSE2 and CSCLK respectively with CPU pin P1 0 P1 1 and P1 2 giving the address I O ports There are 4 parallell I O ports connected to
4. routines External display A D routines and RTC routine driver measuring Serial communication irq Electronic potentiometer routines Configuration Buzzer level Barcode reader Collection data Timer routines Powerfail routine irq irq Start initialization after power on At power on system registers are initialized i e stack pointer etc Then the display is initialized and the text Initializing is displayed during further startup procedure BUC backuped RAM memory is tested and re initialized if lost C variables are initialized EEPROM parameters are mirrored to RAM or set to default values if a checksum error was discovered If erasing memory should be done on keyboard boot command it is done now Electronic potentiometers are initialized Clamp is initialized If continued measuring should be done due to powerfail it is done now The tray is moving one mixing cycle If function testing should be done on keyboard boot command it is done now otherwise the standard menu is displayed The program is now ready for keyboard commands Driving the AC motor The AC motor used for tray mixing cycles is managed by an interrupt routine which generates 50 Hz pulses If for some reason the motor wheel never reach its home position tray jammed etc a motor error is displayed Driving the clamp The clamp is operated by a stepmotor which is controlled by a program subroutine At power up the clamp is rese
5. is a multidrop LAN Local Area Network connector for connecting 1 31 mixers together in a LAN to a common registration PC for registration of blood collections It follows the RS485 standards and the connector is a RJ12 See Operator s Manual for network details External display The connector is a RJ12 connector with 12V power out and parts of the SPI interface SOUT SCLK and CSEXT Information to the display is shifted out in a serial bitstream with ca 500kbps once a second Power supply and voltage regulators The mixer is powered by an internal lead acid battery of 12V 3 5Ah recharged by an external constant battery charger The battery charger can supply the mixer even if the battery is flat or if the battery is removed Battery voltage is measured by the A D coverter and remaining power is shown on display during power up Note When battery charger is connected the remaining power will always display 99 The battery is supplying the backup capacitor with a small maintenance current to keep the RTC and RAM with power during storing and transportation and the battery is protected from being completely emptied by the zener diode Z1 The maintenance current drawn from the battery is less than the battery selfdischarge current Wires and components are protected from hazardious current flow in case of a shortage by a selfrecovery PTC termistor PTCI There are two voltage regulators REGI for 5V digital supply and REG2 for 5V analog supply
6. to avoid digital noise in the measuring circuits The groundplane is also separated in an analog groundplane marked with a dotted line in amplifier section of circuit diagram and a digital groundplane for the rest of PCB Running the testprogram A built in testprogram can be run to verify BM330 functions The testprogram is started when the SETUP key is pressed during power up When testprogram has started takes about 3 4 seconds the display shows TEST AUTOMATIC TEST MANUAL With and keys you can choose Automatic or Manual test Confirm with a press on SETUP A press on RESET ends the testprogram and the ordinary main menu is shown If Automatic test is selected the test sequence will immediately start with test1 Displaytest and continoue with the next test after a new press on SETUP When all 15 tests are done you will be back to the startmenu as above If Manual test is selected with the press on SETUP you can now select the testno with the keys and and confirm with SETUP The testnumbers are listed below for respective testfunction Testfunction ends with a press on SETUP and a new Manual test number can be selected with the keys and or continoue with the next test by pressing SETUP Manual test is ended with a press on RESET and the ordinary main menu is shown TEST MANUAL 1 DISPLAY TI 1 Displaytest All segments of row 1 are turned on in 0 5 sec and then all segmen
7. will erase all data memory Warning All collected data will be lost Data and setup memory clear Data RAM and Setup EEPROM memory is cleared by pressing NEW and SETUP during power up Display will show ETUP DATA NO SE A press on RESET will erase all data memory and setup memory Warning All setup data e g flow alarm time alarm etc will be set to default values All configuration data will be lost and has to be reprogrammed and a new calibration must be done Dismounting the BM330 1 Loosen the 2 screws holding the tray and lift off the tray 2 Loosen the screw with roller 3 Loosen the 4 screws holding the cover marked with arrows on figure Lift off the cover zer gm om nes zo ocev cumsan Ent nv Xa ER vios nos ns usu nos 20 oser oya HNLHOXB31SNQI 12a OEEWS _ warona
8. 193 g cop E a E 4 9311 072 A LI SSI d a CI ema E R E Ui sja xL BIST 2 653 ali E x TAO H 2 M x a 3 bo O A e iim are ses O amm a 3 ao oa eck 1 628 O Y zeal eso J 7 E ag P BER is P te S 2 eo il 1 9Tu e 879 1291 2121 g 223 1 TES ges PIER i i smi v Is de tl eL 9 z 78 E J E Ps O DS E MES 89 SH m T seat o 622 Co Ex co zd 063 863 GED 819 PC bi 318 ts 1 EC 0610516 OI O Der emp 8c O20186 100 26 0E6Eb0AT2q9Y Test protocol Production final test This is the test protocol used for the final test in factory This document is referring to the BM330 test procedure Serial number Reference BM 330 test procedure Description Read value OK ERR Remarks 1 pee AAA AAA 2 Check of basic functions Cover tray assembly 4 Overload and seesaw motion ES 6 Calibration tare before burn in 8 Tare drift after burn in ml 68 69 66 Motor Final inspection 7 Type plate This page is intentionally left blank Ljungberg amp K gel AB
9. BM 330 Service Manual BIOMIXER BM330 Service Manual Ljungberg amp K gel AB This page is intentionally left blank Important This Service Manual is written for the service personnel technicians responsible for service and maintenance of Biomixer BM330 It gives a detailed description about the BM330 soft and hardware explaining how it works and how to run the built in testprogram Note It is important that the service personnel has been trained and approved by Ljungberg amp K gel before opening the instrument or making any repair operation if not the warranty may be invalid L amp K recommend exchange of complete parts as specified in Spare Parts List in Operator s Manual instead of replaceing discrete components For operating instructions and Spare Parts List see BM330 Operator s Manual Abelko Innovation is committed to develop high quality equipment and technical services to all our customers We welcome any inputs on technical issues that are encountered so that they can be resolved quickly and in the most appropriate manner Please submit your comments feedbacks through your local distributors or alternatively email us directly at info abelko se Table of contents Important n 3 Table of contents A DOR RD DDRIRER O DRIED DINE EC REG ODIUM DNE 4 General techmcal description iiie ree eere te ce ide e etit edite i i c doped epe 6 Detailed technical descr
10. J Y t sl o z J z t i W L sms or zu E Rz I w El uz avvetdN3 anooL va esr ze ame de fei ind Ll AT zaon AVISSIOIXS 9931 Component placement oO Ee paar al d 8 MA Pa 18050 op 1249 2dl RO co E OR i O NEO Sl ue e Y B H I Aj IX 8 dm s tig S 121 o T 0 N L jo aa pal K1ezi PZL l Y BIB 92 L E 472 10701 Lera a ced DA o 29r Gal Co See
11. SETUP 10 PORTTEST RS232 TXD ERROR RTS OK 11 Communication test RS485 A loopback test is done and sent data is checked that it also is received data Note This test requires no testequipment but is also limited because it doesn t checks the physical capacity of the RS485 driver Testis ended by SETUP 11 PORTTEST RS485 TXD OK 12 Clocktest 313 In this test the RTC time and date are continously updated The time and date can also be set by pressing and SET Test is ended by SETUP 12 CLOCK 22 3 1997 16 30 13 13 RAM test This test checks all memory cells in RAM without changing the stored data Testresult is shown on row 2 Test is ended by SETUP EMORYT 14 EEPROM test This test checks all memory cells in EEPROM without changing the stored data Testresult is shown on row 2 Test is ended by SETUP 15 EPROM test This test calculates the checksum for EPROM and shows it on the display The value should be the same as marked on the EPROM label Test is ended by SETUP Special memory commands The following memory commands can be useful if there has been scrambled data in memory causing the BM330 to fault or misfunction e g problem with starting up Data memory clear Data memory RAM is cleared by pressing NEW and RESET during power up Display will show A press on RESET
12. and TurboC ver 3 00 containing software simulation of some of the hardware Memory allocation Setup Non volatile setup parameters are saved in EEPROM memory Each time a parameter is changed and the menu is left the parameter is saved to EEPROM and a new checksum is calculated on the entire EEPROM memory Setup parameters can be viewed or changed in the setup or test menus only When the program is started the EEPROM area is mirrored to RAM memory for easy and fast access If a checksum mismatch is discovered during this process a setup error message is displayed and default parameters are used Data Information concerning each collection is saved in capacitor BUC backuped RAM memory This memory is not checksum protected but an area is reserved for a sentinel value that is used to determine if data has been lost due to a long period without mains or battery supply If the memory should be detected as lost during startup it is erased and the sentinel value reinitialized During this erase a hardware RAM check is also performed and a data error message is displayed Hardware RAM check can also be done in the test menu If the memory is lost during operation a data error message is also displayed but the memory is not erased until a restart is done If a powerfail should occur during a critical write of data i e increase of an index value that isn t written in an atomic process it could result in scrambled data To preven
13. ay that eliminates the input offset voltage and has a gain that gives a 0 5V signal for a weight of ca 0 1360g The gain can be adjusted by potentiometer TP2 and adjustments should be made according to instructions in the Operator s Manual See also testprogram number 3 and 4 in this manual The loadcell is protected by stopscrews for both lifting and pressing overloading The upper stopscrew shall be adjusted to 0 1mm distance and the lower stopscrew shall be adjusted to 0 2 mm use a thickness gauge for measuring Adjustments can be done with the loadcell loosened or with the PC board loosened The lower stopscrew is accessible from a hole in the chassis bottom plate See figure below Upper stopscrew 0 1mm Lower stopscrew 0 2mm RS232 serial communication port This port is used for the barcode reader with the power supply 5V and gnd connected to p9 and p5 in the 9 pole male dsub connector See complete wiring in BM330 Operator s Manual It is very important that the used barcode reader has a compatible connection otherwise the mixer or the barcode reader may be damaged The barcode reader current consumption must be max 60mA in average or else the battery operation time will be reduced Note Always use barcode readers recommended by Ljungberg amp K gel The RS232 port is also used by the configuration PC when setting up the mixer for network operation See Operator s Manual for details RS485 serial communcation port This port
14. een reached This includes test of flow alarm time alarm and measuring e Setup memory test by using memory test routines and checking that values remain after powerfail e Clamp motor function by visual inspection in program and test routines e Tray motor function by visual inspection in program and test routines and by preventing the wheel to reach home position motor error test e Memory erase programs by running them and check result in emulator memory and setup menu parameter values Powerfail interrupt by variable input voltage and setting a breakpoint in the interrupt routine Battery capacity by variable input voltage and compare display readings to voltmeter readings RTC by setting and reading time in test menu and collection menu Timer interrupt by breakpoint settings and time measuring between breakpoints External display by measuring on CPU pins when running its test program Taring by compare measured values from voltmeter A D level and electronic potentiometer level with theoretical expectations e Calibration by comparing measured values from voltmeter A D level with theoretical expectations e Stack check by emulator memory control Prom testing e Every menu and program mode has been executed e Two bloodbags connected with a tube of which one contained colored liquid with the density of blood has been used to simulate donations Hardware See schematics on page 20 Microprocessor and memory
15. ion including barcode readings are stored in BUC backed RAM It can be transmitted to the information PC at the end of each collection or at a later time Program verification General e Programming e Simulation of the target system in Borland C e Emulation on Nohau EMULS1 e PROM testing Simulation of the target system Each menu and as much as possible of other functions has been tested during development to find as many bugs as possible during an early stage This has been done by compiling a program version for simulation where keyboard and display has been redirected to a PC keyboard and monitor This simulation tests includes All menus except erase memory Error handling by introducing faked error conditions Barcode reading by introducing faked barcode messages Display routines at high level Keyboard routines at high level Change preset collection volume Emulation on Nohau EMUL51 To test routines that isn t easy to test with a simulation program and to catch bugs in all code segments and in hardware an emulation test has been done e Communication from configuration PC by receiving configurations e Communication from barcode reader by receiving barcodes according to different configurations e Communication to collection PC by sending collections e Communication general by running test program for communication e Collection test by applying 5g weights until the different collection modes has b
16. iption iiiter et e ice pide IER n TEE SEEE e edere 6 Nm es 6 bevelopment environment ig inei pe eee no eed ea eoe ddp PO EE italia 6 Memory allocation asii 6 Nn MEER 6 Dy ebb eas EE ai demone epp PP DD Dni 6 Functional description ON 7 Basic program components block diagram ooooonoccconoccnonoconoconnncnnnnoonnnnnnnnconnnnnnnncnnnnnnnn ccoo nnne en neet ennt nnn 7 Start initialization after power On o nente conocio certo nico tie e NER RERO RR eh nee 9 Driving the AC moftor uto setponecbnUE EP DIO hep DI Date EDD eI 9 Driving the clamp ote esee bete bei e eec se pro ee A end 10 Battery capacity ciclo att 10 Weighing reading the A D cz se eee opm e Deme DRE EUER DERECHO SEO EUER 10 Scanning the keyboard npe ete pet m I IER Te Di ire rette 10 Updating the display ooo Dp epe D D Het C E re RR RH RE 10 Reading the RTG nene a bee es Ledo de Eu IS 10 Automatuc tarine seme bemus Cohen ed pd 10 Buzzer volume nasser ies E de ee dd nie 10 Setup csse is eR EHE 10 Calibration A rs sb ene em Ri 11 Data storing and sendinga coccinea tens dtr 11 UT A O eben dua deer eere EK e bee Dee et 11 Generals 53 nbi em nme bue eua S eum 11 Simulation of the target syster iie eee ihren iets 11 Emulation on Nohau EMULS 1 uuessesssesnnesnnesneesnennnesnnnsnensnonsnennonnnnnnnnsnnnsnnennnesnnesnonsnonsnensnensennnnn
17. lly be adjusted with the potentiometer TP3 Buzzer volume Volume level is adjusted by an electrically programmed potentiometer and adjustments are made from Setup menu see Operator s Manual for details The Eepot is controlled by the SPI bus Clamp linear stepmotor driver The clamp is controlled by a linear stepmotor which is driven by IC16 a Siemens TCA3727 driver For the clamp to close properly the distance from the top to the base must be 55 0 55 5 mm in closed position i e max out se picture below Load cell and amplifier Load cell 325 3 is a full bridge cell given a signal of ca 1 5 mV Kg The origin offset built in offset from loadcell production is manually adjusted with the potentiometer TP1 to a level from A D converter corresponding to ca 100 ml ca 360 mV measured at IC5 pin 4 at production test During this adjusting the electronically controlled potentiometer IC4 is in the middle neutral position When BM330 makes the taring process it adjusts the IC4 potentiometer back to ca 100ml This is done with the empty bloodbag on the tray This value is then referred to as the zero value and deducted from the continous readings when the blood is collected The reason for this electrically adjustment of balance is to give a very dynamic adjustment range insensible of tare weight or if the loadcell has been deformed by tough treatment during transportation or otherwise The amplifier consist of two op amps connected in a w
18. nnnnnn 11 Proim testing nece ep epe ee peter em pitt rape 12 Hardware al escent itt E tidied ene ESI 12 Microprocessor and Memory It E uk cade pe kn re eere e Ee nadien tes 12 Data backup utes MI cL 12 serial synchronous b s SPI ii aterert see nis Bin iso ir bee Nix ie 12 VO ports iota iet ie n eI t eO hie er peii e ges qure 12 Tray motor movement control etie nn kn In bin is open Een els 12 Home Will iioi fa rco tei I erh iit Ss tei et eb Eri o diens 12 LED contrast potentiometer u nee betonen dette BER eee to sette eating 13 Buzzer volume 5 ecce aie ote GRE Re I eins EO Dee es ub eke tiges aste pen 13 Clamp linear stepmotor dfivet 5 eiecti isn DE hee qae inte gen 13 Load cell and amplifier 2 iecit eto IE eite te b e Rb eke IREL ad eepene 13 RS232 serial communication 20 0 14 RS485 serial communication port een idea 14 External display eerti PEE 14 Power supply and voltage regulators Serrin i EE EE E E E OR E ENEN 14 Running the testprogram ana sense Hs E E A Et ES 15 I Displaytest amodo di oU RUD Es 15 2 Keyboardtest u 222 rim RR ans 15 3 Offset Z ro calibration tias 15 4 Gain calibration anda UStn cortina i 16 9 Clamp test a REED Oe tdi eot E is 16 6 Motor and home posi
19. nternal battery is flat or during exchanging It is powered by an internal lead acid battery 12V 3 5Ah and the battery is recharged with an external battery charger with a constant voltage of 14 0VDC and maximum current 0 8A The weighing is done by a loadcell and a bridge amplifier amplifies the signal and an A D converter converts the analog signal to a digital 12 bit word which is serially read by the CPU The mixing tray is operated by an AC driven synchronous motor The 50Hz AC is generated by software in the CPU and transformed to 24V AC waveform by a transformer The clamp is operated by a linear stepmotor controlled by a controller IC TCA 3727 The keyboard is a membrane key matrix and the display is a 2x20 LCD with internal character generator There is one RS232 serial communication port for a PC or a barcode reader and one RS485 port for LAN communication with up to 31 mixers connected together transmitting collected data to a registration PC Optionally an external display with large figures for collection volume can be connected to the mixer Detailed technical description Software Development environment The program is written mainly in ANSI C with MCU specific extensions for Intel 8051 family Compiler is IAR s ICC8051 ver 5 12H Assembler is IAR s A8051 ver 2 03 Linker is IAR s XLINK ver 4 46L Debugging has been done using Nohau s Emul51 emulator but also by using a special program version compiled for Borl
20. on for ca 0 5 sec a new cycle is done stop and so on Check that the motor with the gearbox is running nice and smootly Test is ended with SETUP 6 MOTOR TEST This test shows the battery voltage on display The measuring accuracy is 0 1V and can be adjusted with TP4 7 Battery test 7 BATTERY 12 00 This test checks the electronic potentiometer IC17 and the buzzer connection The potentiometer is programmed 8 Setting of buzzer volume in its middle position 15 and the buzzer starts beeping when or is pressed Check that the volume can be increased with and decreased with and the last value programmed when leaving this test will be the set buzzer volume Note Setting too low value 12 may cause the buzzer to stop beeping Test is ended with SETUP 8 BUZZER VOLUME 15 9 Test of external display outport CSEXT chip select extern display SOUT serial out och SCLK serial clock is going to high level 5V for 0 3 sec then low level 0V for 0 3 sec in sequence A special testequipment with leds connected to the output is needed to detect the outputs Test ends with SETUP 9 PORTTEST EXT DISP 10 Communication test RS232 A loopback test is done and a special testequipment is needed with DTR connected to CTS and TxD connected to RxD DTR and TxD are toggled and read back via CTS and RxD Status is shown with ERROR or OK Test is ended by
21. ror is displayed Automatic taring Prior to each collection an automatic taring sequence is performed It is done by adjusting the electronic potentiometer for taring until the relative volume with empty bloodbag on tray reads 0 ml The absolute volume is then about 100 ml if adjusted and calibrated correctly This means the relative volume can show negative values down to 99 ml If the relative value of 0 ml for some reason cannot be reached a tare error is displayed The manual offset adjustment in the test menu is done to give the electronic potentiometer the maximum possible range at each direction Buzzer volume Buzzer volume is set in the setup menu It is controlled by an electronic potentiometer which can be set to values between 0 to 31 Note that a value less than 12 may cause the buzzer to stop beeping Setup In the setup menu a number of non volatile EEPROM parameters can be viewed and changed Each time a parameter is changed and the menu left the parameter is saved to EEPROM and a new checksum is calculated If the EEPROM has a faulty checksum during initialization a setup error is displayed Calibration The calibration sequence in setup menu is done to establish the coefficient for converting A D bit value to volume or weight This is done by first perform a tare to establish zero point and then adding a weight of 472g to calibrate for bit value to volume Data storing and sending Collection informat
22. t by setting its position counter to closed despite its actual position and then run it to open If the clamp was already open this operation will have no effect but to make sure for the program that the position is indicated correctly Battery capacity The battery capacity is constantly monitored each 5 seconds except for the moments when the tray motor is running If the capacity is too low another collection cannot be started but the current one can be finished Weighing reading the A D The A D converter is used to read the amplified value from the loadcell on one channel The other channel is used to measure battery voltage The loadcell value is converted to volume or weight due to how it is calibrated During collection the filtered difference between values at each weighing cycle is also converted to flow per minute Scanning the keyboard The keyboard is scanned on interrupt and saved in a keyboard buffer If a key is pressed longer than 0 5 seconds it is repeated The keyboard buffer is then polled each program loop Updating the display The display is initialized during startup At each program loop the display buffer is written to the display Reading the RTC The RTC Real Time Clock is read every new second in the program loop The clock value is used for timestamp collection data and keep track of collection time collection alarm intervals etc If the time read from the RTC should be invalid a clock er
23. t this the external watchdog circuit generates an early warning high priority powerfail interrupt Prior to each critical writes of data the powerfail interrupt is disabled the write is done and the interrupt is enabled again The interrupt routine is simply a delay that prevents the normal program to run until the voltage is lost This ensures that a critical write is made in an atomic uninterruptable process Functional description Basic program components block diagram Initialization Continued collection If powerfail during collection See NEW or START at level prior to powerfail Test program SETUP boot Start test program Erase memory program NEW SETUP boot Start EEPROM RAM erase program NEW RESET boot Start RAM erase program Main program NEW Start new barcode collection Scan barcodes Collect blood Collection ready Scan barcodes Send collection data SETUP View and change setup parameters SEND START Start new collection Collect blood Collection ready Send collection data SET INC DEC Change Toggle between 2 current preset volume preset volumes PAUSE Send collection information to Continuos measuring PC program CLAMP Open close clamp without registration RESET Park the tray Sub programs Keyboard scanning Tray AC motor Clamp step motor irq driver irq driver Display driver Error handler EEPROM
24. the databus IC12 is an outport for buffering data written to the display together with the buffered signals AO Al and OUTAX IC 13 is an inport for reading the keyboard matrix scanned with outport IC14 IC14 also turns on and off the buzzer and gives the 50Hz signals to the AC driven asynchronous motor for tray movement IC15 is the outport for the stepmotor controller IC16 The chip select signals to all this I O ports are created by IC8 and are memory mapped for adresses above RAM adress i e from 8xxxH Tray motor movement control The 50 Hz driving the AC motor is generated by the IC14 pin 5 19 signals MD1 MD2 They are pulsing 50Hz with a phase difference of 180 dgr Transistors T1 and T2 are amplifiers and level converters and transformer TRI transform the 12V signal on the primary side to 24 VAC at the secondary side driving the motor The 3 rd phase is generated by the bipolar capacitor C30 Home switch A reed switch mounted on the motor plate works as a position sensor and are actuated by a small magnet glued in a hole in the driver wheel When the driver wheel enters the home position where the tray goes free from the roller i e is in the weighing position the switch is closed by the magnet and the signal is read by the inport IC13 and signals to the CPU which immediately stops the motor and makes a weighing See spare parts list in Operator s Manual for mechanical details LCD contrast potentiometer The LCD contrast can manua
25. the tray is showed on display Put the reference weight of 450ml 477g on the tray with the opening in the reference weight placed over the positioning peg on the tray for best accuracy Note Always use reference weights from Ljungberg amp K gel for best accuracy The reading should be 450 5 but notice that the reading is the rough value without the software automatic calibration If out of limits adjust the GAIN potentiometer TP2 until the reading is 450 5ml remove the reference weight and make a new taring by pressing SETUP to go back to GAIN calibration menu SETUP and after that START again Put the reference weight back and repeat adjustment until the value is within 5ml End with SETUP Note Always end with automatic calibration without maually adjusting the gain to get the correct sofware calibration factor See Operator s Manual Setup functions Calibration 4 CALIBRATION GAIN PRESS START GAIN VALUE 0 450 5 Clamp test This test closes the clamp waits 0 5 sec and then opens the clamp waits 0 5 sec and so on Check that the closing is complete Note Never leave the test in this mode for a longer time i e more then 10 minutes since the step motor will get overheated and may be damaged Test is ended by SETUP and the clamp will be left open 5 CLAMP TI CLAMP OPEN 6 Motor and home position sensor test One mixing cycle is done then a stop in the weighing positi
26. tion sensor test uueesnesnnesnnesnnennesnnennensnensnensnnnnnnnnnnnnennnnsnnesnnennnesnonsnensnensnnnsennnnnnnnnn 16 T Battery dedica is 16 8 Setting ob b zzer Volume eet eei ott iet onte ode qute Heinen 16 SOS NN AAA at senken Brenn 17 10 Communication test RS232 eripe rt ripe t o reae e Eee si a Rn 17 11 Communication test RS485 sse eene enne enne rr 17 19 Clocktestez 45s ee icto been E SA BE br etc o a Lc Cp e PE RR NN 17 13 RAM test onere eee ende GC ES 17 14 EEPROMCESE ida 18 IS EPRONMPEtest 8 rete te hii i Seek Sie E Sots CE esse ePi 18 Special memory commands II 18 Data meimory clear eon esent p 18 Data and setup memory clear eie deer eer ed ee ent bp eene reet bee eee ce top 18 Dismounting the BM330 iii iinet ter ed deir eerte ete tede eere nes ses kin 19 A ET EE 20 Component placement amoena bienes dene etienne 21 Test protocol Production final teSt ooococnnnccnocccoonccconcnonnncnnncnonononnccnnnononn noc nn nono e i tnnt enne ne i nennen nes 21 Test protocol Production final test 22 General technical description BM330 is controlled by an 8 bit microprocessor 8052 with external 64 kbyte prom for program execution and 32kbyte CMOS RAM for data storage A realtime watch RTC Dallas DS1302 keeps the time and date All settings ID calibration constants etc are stored in a non volatile serial Eeprom A backup super capacitor keeps the data RAM and RTC with power when i
27. ts on row 2 are turned on alternately The test is done to verify that display and connections are ok If necassary the contrast can be adjusted see Operator s Manual for details The test is ended with SETUP FE EAE EEE EEE HE EE Keyboard is checked by pressing each key and the display shows the key function End by pressing NEW and SETUP simultaneous 2 Keyboardtest EYBORD TI UP 3 Offset zero calibration This is a check of the loadcell origin offset adjustment done with the inside potentiometer TP1 The electronic potentiometer IC4 is programmed in the middle position after pressing START and the value shown on the display should be ca 0 200 with the empty tray on the loadcell shaft TP1 can be adjusted the cover must first be lift off to the nominal value 100 5 ml The value on display is the actual weight coverted to ml 1 06 affecting the loadcell and is continuously updated Note This origin offset adjustment is normally only need to be done when the loadcell has been replaced or if it has got a hard blow making it change the value radical there is no need to readjust TP1 if the value is 0 200 for the weight of the empty tray End with SETUP 3 OFFSET VALUE 3 CALIBRATION OFFSE 95 100 PRESS START 4 Gain calibration and adjusting Gain calibration starts with an automatic taring after pressing START and then the weight on
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