PS Service Manual
Contents
1. 01 C1061 ZD1 8 2V BR1 W04 1A 04 1515 02 945 Q5 A733 R30 1 2 ohm 1 2W 01 IC 4027 U3 LM358 E cem ZD2 3 3 CON 2P PW 02 1000uF 16V 02 QR H 1N4002 128 1 24 C945 CON 2P PW cou 2P Pw F4 1 32 S Qa as 5 2 TO BATTERY 3 201 a3 uu 82V _ v x v x V cas 0 VIN E E S p 4 mii R36 0 470U 16V R34 10K aps 2M 5 E 1K E 21 542 gt l C33 7 1042 4027 18 JAUTO OFF L C34 1042 VIN V R38 470R I r lt R46 R41 22k 2V5 gt gt LOBAT 6 i 2 5 LM358 LO LOBAT Description 1 Adaptor This AC Adaptor provides power for DC9 12V 50MA 2 Battery Built in Rechargeable Battery 6V 4Ah 3 How Battery is charged completely The charging voltage is regulated by 01 C1061 ZD1 8 2V for about 7 volts The charging current will godown automatically whenvoltage reached Q2 C945 R30 1 2R 1 2W provide Over Current protection 4 5V power drives digital circuit system t5VpoweriscreatedbyU3B LM358 withnegative feedbacktechnology 5 5V amp 5V power drives analog circuit system U12 AIC1722 50 and2. 0 29 3 33 ana Ww wwe aye m m iu 5 0H M M E PS 10 2 BOTTOM OVERLAY ms ca m a n E e Ae 5 10 2 us at CJ 88 09 17 Po op E uA o R5 09 los an 2 R cu ipuy RS ESSI jw Ae RED 819 78 B 630 J FROM AC 1 To 1 35 RIS R37 L k R34 R32 11 J HOLD m v ZERO MC TARE UB RM FROM DC JACK PS 10 2 TOP OVERLAY 2 3 6 BILL OF MATERIAL STRUCTURE Parts No Description Specification Qty Remark A00590 LOADCELL 1022 CB030 A0950000011 CAB E CONNECTOR LTW 6FM 90 5001000312 MOVABLE BUSH NG PS SER ES AMB 1S FOOO1PS1100 5 5 HASI NG UPPER PS SER ES 001 51000 5 5 HAS NY UNER PS SER ES 2 5 5 PLATTER PWSER ES FOO03PS1100 CELL SUPPORT PWSERI ES LPPER 1101 LOAD CELL SUPPORT PWSER ES UNDER FOO03PS1102 LOAD CELL SUPPORT PS SER ES UPPER FOO03PS1103 LOA CELL SUPPORT PS SERI ES UNDER FOOO4PS1000 5 5 PILLAR F0009000035 5 5 PLATE PS SERI ES L SHAPE PS SER ES LLAR SUPPORT O 5 5 5 5 1 1 HB PP nit 029 51000 5 5 ADJUSTABLE FEET PS SERI ES GDOO04BWOO0 USTABLE FEET BWSER ES GDOO4PS1000 PLASTI C FOOT 8 10h 004PVO100 RUBBER
3. Devic Display WIN Liquid Crystal Display 1 2 digits 25mm height Load Cell Used PS 3000 6000 12K 30K Load Cell Cap TEDEA 1022 Model PS 3000S 6000S 15KS 30KS NMB 030 Model acity PS 3000 7 PS 6000 10kg PS 15 20kg PS 30 35kg 2 3 6 Analog Specification Input sensitivity 2mV V Zero Drift 0 02 10 Zero Balance Range 2 of rate capacity Load Cell Excitation Voltage DV5V A D Conversion Speed 10 times second Internal Resolution 30000 3 INITIAL SETUP 3 1 INTERNAL FUNCTIONS AND SETTING METHODS INTERNAL FUNCTION TABLE Function Symbol Description 1 ET Span value reading and dealer calibration 2 2 Full display segment max capacity check 3 E 3 Check offset value and scale configuration 4 4 Auto power off setting HOW TO ENTER THE REQUIRED FUNCTION MODE Turn scale of or Scale display F 1 Press and hold TARE then turn scale on Press TARE until the required function number apears Press MODE Press MODE until the required setting appears Press TARE to confirm Repeat step c to f for other function setting Press ZERO to save settings and return to normal 15 Value Reading and Dealer Cal
4. 2 3 2 Check whether LCD is broken 2 4 CPU Checking 2 4 1 Check that all pins are s 2 4 2 Check that the Crystal Os 2 4 3 Check the RESET is normal 2 5 A D Unit Checking 2 5 A D unit 2 5 2 Check that the signal out 2 5 3 Check OP Amplifiers amp A D Converter AD7715 When no error is found with the above checking procedures the trouble can be caused on the loadcell or the PCB itself Replace a new on could be better to identify the d fectiv In this way the readout of weight would be varied because of the output voltage of loadcell and different required after this replacement Span value so recalibration is 19 5 ELECTRICAL CIRCUITRY 5 1 SCHEMATICS IN1 INVERTER R24 A733 81 22K
5. ADDRESS REGISTER BUFFER PC INCREMENTER INTERRUPT SERIAL PORT AND TIMER BLOCKS PROGRAM COUNTER DPTR PORT1 PORT 3 LATCH LATCH PORT 1 DRIVERS PORT 3 DRIVERS P1 0 P41 7 P3 0 P3 7 STACK POINTER 12 4 AT89C51 SS ea ee al ANALOG DEVICES 3 V 5 V 450 16 Bit Sigma Delta ADC AD7715 FEATURES Charge Balancing ADC 16 Bits No Missing Codes 0 0015 Nonlinearity Programmable Gain Front End Gains of 1 2 32 and 128 Differential Input Capability Three Wire Serial Interface SPI QSPI MICROWIRE and DSP Compatibile Ability to Buffer the Analog Input 3 V AD7715 3 or 5 V AD7715 5 Operation Low Supply Current 450 pA max 3 V Supplies Low Pass Filter with Programmable Output Update 16 Lead SOIC DIP TSSOP GENERAL DESCRIPTION The AD7715 is a complete analog front end for low frequency measurement applications The part can accept low level input signals directly from a transducer and outputs a serial digital word It employs a sigma delta conversion technique to realize up to 16 bits of no missing codes performance The input signal is applied to a proprietary programmable gain front end based around an analog modulator The modulator output is pro cessed by an on chip digital filter The first notch of this digital filter can be programmed via the on chip control register allow ing adjustment of the filter cutoff and output update rate AD7715 fea
6. Selectable LCD drive configuration Static biplexed triplexed or quadruplexed 32 segment drivers Cascadable for larger LCD applications Selectable LCO bias voltage configuration Static v2 or 1 3 Hardware logic blocks reduce system software requirements amp bit serial interface Two 32 x 4bit static RAMs for display data and blinking data storage Programmable segment decoding capability 16 character 7 segment numeric decoder 64 character 14 segment USASCII alphanumeric decoder Programmable segment blinking capability Automatic synchronization of segment drivers with sequentially multiplexed backplane drivers i Single power supply variable from 2 7 V to 5 5 V Low power consumption CMOS technology Extended 40 C to 85 C temperature range available 000 oog Ordering Information eee Max Frequency Part Humber of Operation 072256 00 Packaga Type 52 plastic miniftat 1 MHz Pin Configuration 8 5 2222222222 HOOP HHH H HH ate Pl 1 1 16 5 3 Xx n Sx OQ 26 T s sa CO a 1 ID 5 2 42 a 5 sa a 23 HD S lt 54 4 n ID 5 3 CIT 4 7115 Vico OLJ a Pin Identification Symbol Functloa Cu System clock output 2 SYNC Synchronization port 3 5 Vieni LCD bias
7. TUBE PWSER ES G0005BWIOO0 PLATTER BEAR NG RUBBER BWSER ES 0B0PS1020 RUBBER PLUG PS SER ES XIPS1000000 OPERATI CN MANUAL PS SER ES 20011200020 5 5 SCREW Ny Lock Mb20 20014100508 SCREW 2001410065 5 5 SCREW M 25 20015100400 5 5 SCREW Mix6 20015100410 SS SCREW Mix10 10 ZoBWIO00010 NG MATERI AL PM ES 1 40906000210 DC JACK SCD 21 1 A0950000010 CONNECTOR WATER PROOF LTW6M C 1 A1204040250 ARRAY 4 PIN 25cm 1 A1208020351 BATTERY WRE ARRAY 2PIN 35 cm S 1 INDICATOR STRUCTURE Parts Nb Descri pti on Speci f i cati Renar k AL1600060400 RECHARGEABLE BATTERY 4 CIPSP e OVERLAY PANEL PC PS SER ES CIPS1000000 PC PLATE PS SER ES 8 HES 1 51000011 NT PS 10 X 3 5 5 MOUNTING PLATE PS SERIES FOOO5PS1000 5 5 O SPLAY HOUSING PS SER ES FOOO5PS1100 5 5 O SPLAY HOUSING PS SER ES 1 50000 5 5 BATTERY PLATE NBS FS 1705 PS F0022000010 S S AJ USTABLE FEET FS NJ CATR FI X NG 030FS0000 RUBBER PLUG DC J XK SCD 021 FRONT PNP H H H H 2 9 QDO3OPS1000 RUBBER PACK NG PS SER ES 6 GDO3OPS1010 RUBBER FRAME PS SER ES 1 030PS1030 RUBBER PACK NG PS SERI ES 21 15 3 x5L 1 20010000306 SCREW MBx5 6 20010000308 SCREW 8 2 20010001305 SCREW 3x5 NG 5 MAINBOARD Parts Descri pti on Speci f i cati Qy Renar k 1000000 P CB PS 10 X 1 40202093461 I C 9346 1 LB A020307 450 I C AD771
8. U11 IC 7660 are used to create 5V power 6 Auto off If the scale is set on 4 or even under LOBAT situation after some minutes the CPU will release apositive pulse signal to change the 01 4027 output statethen makes Q4 cut off the scale will be shut off immediately 7 Low Power Detection U3A LM358 is acted as a voltage comparator When battery power is less than 5 5V it will release a low potential signal to CPU then CPU will instruct LCD display to show LOBAT symbol 4 2 1 2 Input voltage 5 5V or higher Check and recharge battery if voltage less than 5 5V Check DC JACK or AC Adaptor if been defectiv 18 4 4 2 1 3 System voltage Vcc 5V 105 Check that the system voltage is within5V 10 a less than 4 5V the CPU ma b more than 6V ghost will appear on LCD 2 2 Platter Stopper Checking The platter device shall not touch anything around itself during operation Check that the platter is not contacted with the upper no load and or lower with load stopper 2 3 LCD Display Checking 1 Check that it is soldered and connected properly between LCD y not work properly driver IC uPD7225 and CPU ated properly into the socket cillator works ly low 1 Check that the 3 3V amp 5V powers are correctly fed to the put of loadcell is normal 2 3 and driver IC uPD7225
9. m iiy LD Na Drowing Revision lt PIZ Auro arr mo ALE an 10 2 VY 1 z Size A3 Sheet of 3 ua Date 89 01 31 Drawn by 1 2 3 4 5 6 7 8 9 wn A 20 2 5 4 5 7 8 9 u2 AICI722 50C2L v OA 5 10 16V 5 v2 43v t I I AIC 1722 33 de C48 m t Tour 16V 2 T IN w C40 10uF 16V 1042 un 7660 L I GND pv 1 8 n 2 INC V 7 c39 1047 c osc H 1042 C42 E c2 L3 VTS 1042 T 10F 16V Ji LI C46 4 gt s 1047 L gt s at C44 10uF 16V JPI 5V PAN 5 uS 0 47UF 63V y Cl 103J 100vV u6 407715 C50 1042 R49 DVDD cu 4 1 62 ney 1042 u 5 00868 1 R6 17 7 AIN DIN AAA AAA MIDOK 0 22uF 100 BAIN DOUT inti MI00K 1 OY INTO 30 Ber NCLK_IN ALE R2 MCLK_GUT c5 45V MIOOK 0 47UF 63V U nes L ce osz 1 p VR20K v R7 RIO C4 25K MF 40K MF 1042 1 1 cn 10K MF l 1042 5 4 2
10. 5AN 3 1 5 A0205040270 I C 4027 1 0206000071 I C CP 0 CP 1 0206000072 I C CP 177 1 A0206003580 I C LIVB58N 1 LB 0207017223 VQ TAGE A C 1722 33ZT 1 A0208072250 I C UPD 225G 1 UW A0300000040 1 C SOCKET 40 PIN 1 U7 A0401001060 TRANSI STOR 2SC1061 1 Qa A0401007330 TRANSI STOR A733 3 5 6 40401009450 TRANSI STOR 250945 2 7 A0401015150 TRANSI STOR 2SA1515 1 Q1 A0501004002 DIODE 1N4002 1 D2 A0501004148 DIODE 1N4148 1 D1 A0502000001 BRI D RECTIFIER WOA 1A 1 BRI A0503020033 ZENER 3 1 AZ 40503020082 ZENER 1 2W8 2V 1 A0625050000 LED GREEN RED ROUND 5 1 LED1 A0701108016 CAPAC TR 1000uF 16V 1 090 A0701477016 CAPAC TCR 470uF 16V 1 C2 A0701106016 TCR 104 16V 8 C16 20 24 25 27 28 36 47 0701106016 TCR 10uF 16V 6 37 39 42 43 44 A0713474063 CAPAC TCR 0 47uF 63 105 3 7 8 10 720103101 TCR PEI 01uF 100 103 1 A0730104050 CAPAC TCR MLC 1047 28 C2 69 11 12 14 15 1721 23 26 29 31 33 35 38 40 41 45 46 48 50 A0 40020050 CAPAG TCR 20pF 2 C18 19 0803041002 METAL FILM RESI STOR 10 1 4W 2 R8 11 0803042502 METAL FI LM RESI STOR 25 1 4w 1 R7 A0803044002 METAL FI LM RESI STOR 40K 14W 1 R10 A0804041003 METAL FI LM RESI STOR 100K 1 4w 5 R2 6 A0804041272 METAL FI RESI STOR 27 1 4 1 R44 A0805020120 CARBON FI LM RESI STC
11. 7012 Ru 1042 10K MF Title lt D Drawing No Revision Size A3 Sheet 2 of 3 Date 89 01 31 by 2 3 4 5 6 7 8 9 PS10B SCH A D Sun May 02 15 29 24 1999 21 1 2 5 4 5 6 7 8 9 c1061TT Ve 4t c30 St n tON 2P PW 1000uF 16V 02 R30 bi 2 LAAA t vn 1 IN4002 cis 470U 16V E us 2 f wk 25 1N4148 26759 sm e 100R 1 2w 15K 4 7K cons2e ew P a733 i 5 sw2 2 4 AC 9V INPUT BRI 452 3 i 2 i TO BATTERY 4 8 2v 7 Leor R33 v v 1 5 4027 2 2 lt viv gt SET GREEN e RED lt _ u bak E L C34 1042 res R29 470R 4 5V V R38 jp Use 470R LN358 viet 5V C36 1 10uF 16V m R46 R41 E z 2x NW TM i LOBAT 4 LM358 LO LOBAT LM358 VA U3B Se Title 2 01 eU PS POWER Drowing No Revision Size A3 Sheet 3 of 3 Date 89 01 31 Drawn by 1 2 3 4 5 6 7 8 9 PS10B SCH POWER Sun May 02 15 30 09 1999 22 5 2
12. ION 7 APPENDIX ITEM PART NUMBER PART NAME SPECIFICATION 1 0002 0000 5 5 PLATTER PW PS SERIES 2 F0001PS1100 S S HOUSING UPPER PS SERIES 3 G0004PW0100 RUBBER TUBE PW PS SERIES 4 4 G0005BW1000 PLATTER BEARING RUBBER BW PS SERIES 4 5 F0003PS110 LOAD CELL SUPPORT UNDER PS SERIES L 6 A0071000 LOAD CELL 7 0003 51100 LOAD CELL SUPPORT UPPER PS SERIES 8 F0009000035 S S PLATE PILLAR SUPPORT 9 0001 51000 S S HOUSING UNDER PS SERIES 0 5001000312 MOVABLE BUSHING PS AMB 1S 1 NAME PLATE 2 12 F0029PS1000 5 5 ADJUSTABLE FEET COVER PS ADJUSTABLE FEET 4 3 G0004BW1000 ADJUSTABLE FEET BW PS SERIES 4 14 F0004PS1000 S S PILLAR PS SERIES 15 G0004PS1000 PLASTIC FOOT 8 10h L 16 5001000301 CABLE TIE 1205 17 F0003PS0000 S S MOUNTING PLATE U SHAPE INDICATOR FIXING L 18 F0022000010 S S ADJUSTABLE FEET INDICATOR FIXING 2 19 60030 51020 RUBBER PLUG PS SERIES L 20 A0950000011 CABLE CONNECTOR FEMALE LTW 6FM 21 A0950000010 NUT LTW 6MS C L 22 A0906000210 RUBBER PLUG SCD 21 23 A0906000210 NUT SCD 21 2 24 F0005PS1100 S S DISPLAY HOUSING REAR PS SERIES L 25 A0950000010 CABLE MALE LTW 6MS C 26 G0030PS1030 RUBBER PACKING PS SERIES 21 15 3 x5
13. L 27 0906000210 DC JACK SCD 21 BLACK 28 A1208020351 BATTERY WIRE ARRAY 2 PIN 35cm 29 G0030FS0000 RUBBER RING SCD 21 L 30 1600060400 RECHANGEABLE BATTERY GP4 6 6V 4 31 F0013FS0000 S S BATTERY PLATE FS 1705L PS 32 G0030PS1010 RUBBER FRAME PS SERIES 33 E1PS1000011 P C B 5 10 34 A0102000289 D UTN G289JV L 35 1 51000000 PC PLATE 8 HOLES PS SERIES 36 1 60030 51000 RUBBER PS SERIES 6 37 F0005PS1000 S S DISPLAY HOUSING FRONT PS SERIES 38 C1PS1XXXXX OVERLAY PANEL PC PS SERIES L 39 20015100410 5 5 SCREW M4 10 10 40 Z0014000625 5 5 SCREW M6 25 4 41 170011000420 S S SCREW M4 20 6 42 20014000508 SCREW M5 8 6 43 20015100406 S S SCREW M4 6 6 44 20010000308 SCREW M3 8 2 45 20010001305 SCREW 3 5 5 46 170010000306 SCREW M3 5 6 29 O 9 5 r Features Compatibie with MCS 51 1 Products 4K Bytes of In Circuit Re Programmable Flash Memory Endurance 1000 Write Erase Cycles Data Retentlon 10 Years Wide Operating Voltage Range Vcc z 2 7V to 6V Fully Static Operation 0 Hz to 16 MHz 3 Level Program Memory Lock 128 x 8 Bit Internal RAM 32 Programmable I O Lines Two 16 Bit Timer Counters 5 Interrupt Sources Programmable Serial Channel Low Power Idle and Power Down Modes 8 Bit Microcontroller with 4K Byte Flash AT89C51 Description Preliminary The AT89C51 is a low power high performance CMOS 8 bit microcompu
14. LK OUT Vor Output Low Voltage Output High Voltage Floating State Leakage Current Floating State Output Capacitance Data Output Coding A Version 16 See Tables IX to XII 10 0015 See Note 2 0 2 See Note 2 0 2 See Note 2 0 2 Note 2 0 2 30 003 1 0 6 90 98 98 150 150 AGND to AVpp AGND 30 mV AVpp 30 mV AGND 50 mV AVpp 1 5 1 10 0 to 4 Vgg GAIN Vapp GAIN GAIN x wi 64 8 41 25 feix m 64 10 0 8 2 0 0 4 2 5 0 4 DVpp 0 6 10 9 Binary Offset Binary Units Bits min of FSR max typ HVAC typ ppm of FSR C typ of FSR max typ UPC typ dB min dB min dB min dB min dB min V min to V max V min V max V min V max nA max pF max nom nom V nom max V max V min V max V min V max V min max pF typ Conditions Comments Guaranteed by Design Filter Notch lt 60 Hz Depends on Filter Cutoffs and Selected Gain Filter Notch lt 60 Hz Typically 0 0004 For Gains of 1 and 2 For Gains of 32 and 128 Specifications for AIN and REF IN Unless Noted at DC Typically 102 dB For Filter Notches of 25 Hz 50 Hz 0 02 x For Filter Notches of 20 Hz 60 Hz 0 02 x For Filter Notches of 25 Hz 50 Hz 0 02 X For Filter Notches of 20 Hz 60 Hz 0 02 X AIN for BUF Bit of Setup Register 0 and REF IN AIN
15. MAINTENANCE MANUAL PS SERIES MODELS 5 3000 5 6000 5 12 5 30 5 30005 5 60005 5 15 5 5 30 5 CONTENTS 1 INTRODUCTION 2 SPECIFICATIONS 2 1 SYSTEM BLOCK DIAGRAM 2 2 PHYSICAL IAYOUT OF ELECTRICAL CONNECTION 2 3 GENERAL SPECIFICATION 3 INITIAL SETUP 1 INTERNAL FUNCTION AND SETTING METHODS AUTO AND DEALER CALIBRATION PROCEDURES DISABLE CALIBRATION WITH DIP SW 51 OFFSET AND SPAN VALUE DATA FLOW CHART CO CO CO CO CO 5 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 5 ELECTRICAL CIRCUITRY 5 1 SCHEMATICS 5 2 PCB LAYOUT 6 BILL OF MATERIAL 7 APPENDIX APR 2001 REV 1 Specifications and Function Subject to Change without Notice 1 INTRODUCTION PS series is designed except those listed on t according to 65 protection requirements to assure working properly under toughest environment Ender users should be advised not to undertake any troubleshooting he operation manual This maintenance manual containsof certain information that may result in fraudulent use Do not release any part of this manual to any end users or un authorized persons The internal DIP S W shoul or al
16. R 1 2 1 2 1 R30 26 0805021101 0805041102 0805041103 0805041105 0805041205 0805041334 0805041153 0805041203 0805041221 0805041223 0805041471 20805041473 40801001203 40802047309 40902010020 40910000080 40910100130 A1100260000 A1301000002 A1306000003 A1400000006 1401005120 1500000004 45005000110 40102000289 40201089511 CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR CARBON FI LM RESI STOR TRIMMER RESI STOR ETVERK CONNECTOR PO ER CONNECTOR FPC SOCKET STRIPS CRYSTAL DIP SW TACT SW BACK LIGHT INVERTER BUZZER J UPER LCD I C 100 1 2 1 1 4W 10K 1 4w 1M 1 4W 2 1 4w 330K 1 4w 15K 1 4w 2 1 4w 220 1 4w 22K 1 4w 470 1 4w 4 7 1 4w 3006P 001 203 20K 47 9 PIN 2 WAFFER 8 PIN ZF SI P 1413 FEMALE 6 0MHZ 5 02 4 PIN KPT 1104B 130 44mm 5V TO 120V 15210 10mm 089 891 O N HB HA HA H H H Q HP H NJ N U H H Ui N 4 N HI H H R27 R14 32 R13 15 18 20 22 36 39 49 R33 35 46 R34 R17 1 F21 R26 28 R24 41 42 45 R29 38 16 23 37 40 43 VR1 NRL 12 3 7 1218 LCD 51 SW1 8 EL1 IN1 L1 2 27 PARTS EXPLOS
17. R1 the main board to obtain correct offset value HOW TO ADJUST SPAN VALUE The span value is controlled by resistor located on RIA standard resistor value of RIA is listed on the above table If the required Span value is not attained then change R1A resistor according to either case below Span value too low Increase the resistance of RIA Span value too high Decrease the resistance of RIA 10 3 5 FLOW CHART 3 5 1 Auto Calibration for end user PRESS MODE amp ON OFF DISPLAY LOAD DISPLAY XXXX DISPLAY or gt r DISPLAY XXXX PUT A ASSIGNED WEGHT ON PLATTER CORRECT WEIGHT ASSIGNED DISPLAY MODE KEY MODE YES ZERO NO gt PRESS MODE OR ZERO KEY NO YES DISPLAY DONE DISPLAY 99999 DISPLAY 99999 DISPLAY DISPLAY 00000 00000 DISPLAY NO ape STANDBY FOR OPERATION WEIGHT STILL ON THE PLATTER XXXX ASSIG INED WEIGHT 3 5 2 Function Test for technicians only 5 55 amp ON OFF LCD PANOR AMIC VIEW RELEASE ON OFF KEY 5 RELEASE TARE KEY 9 Y D MODE Other lt Y TARE Ce e COUNT DOWN STANDBY FOR OPERATION 12 DISPLAY A D gt 0 3 PRESS KEY CODE 1 2 1 2 NOTE 1 TARE key 2 ZERO key YES END LEGITIMATE PROCEDURE o Accert Pr
18. R25 3 5V 05 02 4 amp out 5V ca is GND 1 F 20 sag mm 0 gs 2 R XTALI vod se 15 ds 220R 1047 027 czo 23 2 EH XTAL2 EDS EL 89X25MM Io 16V 3 PIT 10uF 16V PIB a AUTO OFF UB RESET 5 cs 33C46 P14 2 1 eevee R23 BUSY Pon 2 CS R Ik ASK NCH ey 1 t NCEE 1042 PD2 DO GND P03 4 PO4 SI POS STROBE S 822 BUSY 07 PO7 P25 BKLT DAS P24 C945 RD P23 10K WR 522 P21 P20 Ey TO 1DuF 16V 1 4 INTO 2 08015210 19 SEGLOO 16 110 ALE PROG Hit gt ALE RXD EA VPP 1 del ug boli tol D foar UPD7225 5V 5V NRI as 5V 47K 9P 208 TO RS 232 T m a m lt 1 24 peal NTI CJ gt p23 pral mem 5V 43 p20 CH gt P22 46 LCD G289 P21 411 C28 381 44 10uF 16V UID 50 C 74HC374 ea 51 20 1042 52 SW1 ON OFF T T sw D sa 10 SWE HOLD R17 SEG 0D 21 2 STROBE gt STROBE gt 5 5 Sir 220K 3 P25 gt s 4 52 5 gt 5 SWI t24 P23 2 9 e SW4 5V 184 5 B p22 7 2 P21 2 gt 5 RIB R20 R21 SW6 MODEI 3 m E 10K 10K 10K 15K e C C22 nay i 5V 1047 1042 1042 Title gt v O 5V c POWER 0 av m sw2 Sw2 VIN A D 5V
19. for BUF Bit of Setup Register 0 and REF IN BUF Bit of Setup Register 1 Unipolar Input Range Bit of Setup Register 1 Bipolar Input Range B U Bit of Setup Register 0 For Gains of 1 and 2 For Gains of 32 and 128 1 for Specified Performance Functional with Lower Vggr Ig 100 pA Except for MCLK OUT Isouncs 100 pA Except for MCLK OUT Unipolar Mode Bipolar Mode 33 7225 CMOS Intelligent Alphanumeric LCD Controller Driver Description 07225 is an intelligent peripheral device de signed to interface most microprocessors with a wide variety of alphanumeric LCDs It can directly drive any static or multiplexed LCD containing up to 4 backplanes and up to 32 segments and is easily cascaded for larger applications The uPD7225 communicates with a host microprocessor through an 8 bit serial interface It includes a 7 segment numeric and a 14 segment alpha numeric segment decoder to reduce system software requirements The 07225 is manufactured with a low power consumption CMOS process allowing use of a single power supply between 2 7 V and 5 5 V It is availa ble in a space saving 52 pin plastic flat package Features O Single chip LCD controller with direct drive Low cost serial interface to most microprocessors Compatible with 7 segment numeric LCD configurations up to 16 digits 14 segment alphanumeric LCD configurations up to 8 characters
20. ibration Simply enter F 1 to read the A D counts a b Press ZERO to clear the the span value of Refer to operation D counts apply test mass onto platter test mass will be displayed Dealer Calibration procedures for dealer calibration F 2Display Segment and Rated Capacity amp Division Check When function is entered Check and make sure that no segm all segments will be displayed ents are missed F 3Total Internal Count Checking and Scale Configuration a b Enter F 3 scale displays the Of Fset Value when unloaded Apply extra load onto platter the total internal count value will be displayed SELECT WEIGHT UNITS Press and hold MODE To employ all lb appears appears Press ZERO to save setting and back to normal metric and pound To disable pound weight unit until the weight unit appears weight units press MOD Euntil kg press MOD E until operati on status F 4Auto Power Off Setting Two modes are available Default 4_OFF atically be turned off after 4minutes OFF Auto Power Off function is disabled 4 OFF Scale will autom unused 3 2 AUTO AND DEALER CALIBRATION PROCEDURES ACCEPTABLE LOAD FOR AUTO AND DEALER CALIBRATION Model Number External Acceptable Auto and Dealer Division Calibration L
21. ivate DISPLAY SPAN VALUE PUT ON THE ASSIGNED WEIGHT DIP gt Y NO lt Y Y SW 1 N ES PRESS MODE 13 e TARE MODE nonne C D PANORAMIC nonne MODE TARE TARE 20 MODE WEIGHT UNIT CHANGED kg lt gt kg Ib 14 TARE Auto shut off when not in use for 4 rin gt TARE x x MODE No 0 Faties Auto shut off 15 4 TROUBLE SHOOTING 4 1 TROUBLE SHOOTING LOOP POWER ON NO DISPLAY DISPLAY RANDOM IGURE ECK POWER SUPPLY U LCD KEYBOARD SHOW UNTS AND 100000 2 CHECK LOAD CELL A D UNIT OFFSET VALUI GHOST EADOUT HECK POWER H UPPLY LCD LCD T DRIVER IC 18 21 PLATTE OPPER LOA ELL A D UNI BAD SOLDER CAN T REACH THE CAPACTTY INCORRECT CHECK PLATTE STOPPER LOA CELL OFFSET VALUE NORMAL OP 16 4 2 PARTS AND COMPONENTS TROUBLE SHOOTING 4 2 1 Power Supply Checking 4 2 1 1 Relevant parts Main Board 5 10
22. leted and scale is ready for operation 3 3 DISABLE CALIBRATION AND AVOIRDUPOIS WEIGHT UNITS WITH DIP SW S1 The DIP SW 1 is used to control calibration and avoirdupois weight units Push this switch to ON position to disable calibration 3 4 OFFSET AND SPAN VALUE DATA OFFSET AND SPAN VALUE DATA TABLE Model Offset Span Value Thousand at Offset Span Number Value Various Load Applied Control Control Ohm Thousand PS 3000 10 14 10 15 1kg 20 30 2kg immer 47K 5 6000 10 14 10 15 at 2kg 20 30 at 4kg VR1 Trimmer 40K PS 12K 10 14 10 15 at 5kg 20 30 10kg VR1 Trimmer 25K PS 30K 10 14 10 15 at 10kg 20 30 at 20kg VR1 Trimmer 25K 5 30005 10 14 10 15 at 2030 at 2kg Trimmer 47K 5 60005 10 14 10 15 at 2kg 20 30 at 4kg Trimmer 40K PS 15KS 10 14 10 15 at 5kg 20 30 10kg VR1 Trimmer 25K 5 30 5 10 14 10 15 at 10kg 20 30 at 20kg VR1 Trimmer 25K READING OFFSET VALUE 1 Turn scale off 2 Remove all load from platter 3 Enter F 3 and read the offset value READING SPAN VALUE Turn scale off Remove all load from platter Enter F Press ZERO Apply load to platter Span value according to load applied will be displayed WN S HOW TO ADJUST OFFSET VALUE In case the offset value is out of range adjust the trimmer located at V
23. log Devices FUNCTIONAL BLOCK DIAGRAM REF IN REF IN AVpp Dvop CHARGE BALANCING A D CONVERTER IsiGMA DELTA _ DIGITAL ae tr ses 2221 CMOS construction very low power dissipation and the power down mode reduces the standby power consumption to 50 typ The part is available in a 16 lead 0 3 inch wide plastic dual in line package DIP as well as a 16 lead 0 3 inch wide small outline SOIC package and a 16 lead TSSOP package PRODUCT HIGHLIGHTS 1 AD7715 consumes less than 450 in total supply current at 3 V supplies and 1 MHz master clock making it ideal for use in low power systems Standby current is less than 10 pA 2 The programmable gain input allows the AD7715 to accept input signals directly from a strain gage or transducer remov ing a considerable amount of signal conditioning 3 AD7715 is ideal for microcontroller or DSP processor applications with a three wire serial interface reducing the number of interconnect lines and reducing the number of opto couplers required in isolated systems The part con tains on chip registers which allow software control over output update rate input gain signal polarity and calibration modes 4 The part features excellent static performance specifications with 16 bits no missing codes 0 0015 accuracy and low rms noise lt 550 nV Endpoint errors and the effects of temperature d
24. oad PS 3000 1 6000 2kg 5 6000 1 6000 4kg 2kg PS 12K 1 6000 10kg 5kg PS 30K 1 6000 20kg 10kg 5 30005 1 3000 2kg 1kg 5 60005 1 3000 4kg 2kg 5 15 5 1 3000 10 5kg 5 30 5 1 3000 20kg 10kg Recommended calibration load Dealer Calibration Procedures OB WN ES Turn scale off Press and hold Scale displays Press MODE Scale displays Press ZERO Press TARE Z ne D pj Press RO Press Lr D R HP then turn scale offset value It means the scale is ready the figure being displayed is 0 or 1 Load calibration either 1 When value displayed is s Wait until the scale starts countdown Calibration completed and scale is ready for operation Auto Calibration Procedures gt P P Turn scale o Press and hold Scale displays Press MODE MODE then CAL Press ZERO scale displays circle at the right hand of the display For dealer calibration Make sure that oad as listed o n n table press MO turn scale on press ZERO again above table DE 5 Scale displays LOAD or 6 Load calibration load according to above table 7 Wait until the scale display DONE and starts count down 8 Calibration comp
25. rift are eliminated by on chip calibration op tions which remove zero scale and full scale errors One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 World Wide Web Site http www analog com Fax 781 326 8703 Analog Devices Inc 1998 32 0171 5 3 SPECIFICATIONS 3 V DVpp 3 V REF IN 1 25 V REF AGND AD7715 foun 2 4576 MHz unless otherwise noted All specifications Tyy to Tuay untess otherwise noted Parameter STATIC PERFORMANCE No Missing Codes Output Noise Integral Nonlinearity Unipolar Offset Error Unipolar Offset Drift Bipolar Zero Error Bipolar Zero Drift Positive Full Scale Error Full Scale Drift Gain Error Gain Drift Bipolar Negative Full Scale Error Bipolar Negative Full Scale Drift ANALOG INPUTS REFERENCE INPUTS Input Common Mode Rejection CMR Normal Mode 50 Hz Rejection Normal Mode 60 Hz Rejection Common Mode 50 Hz Rejection Common Mode 60 Hz Rejection Common Mode Voltage Range Absolute AIN REF IN Voltage Absolute Common Mode AIN Voltage AIN DC Input Current Sampling Capacitance AIN Differential Voltage Range AIN Input Sampling Rate fs REF IN REF IN Voltage REF IN Input Sampling Rate fs LOGIC INPUTS Input Current All Inputs Except MCLK IN Input Low Voltage Vym Input High Voltage MCLK IN Only Vni Input Low Voltage Vig Input High Voltage LOGIC OUTPUTS Including MC
26. ter with 4K Bytes of F lash Programmable and Erasable Read Only Memory PEROM The device is manufactured using Atmel s high density nonvolatile memory technology and is compatible with the industry standard 80C51 instruction set and pinout The on chip PEROM allows the program memory to be reprogrammed in circuit or by a conventional nonvolatile memory programmer By combining a versatile 8 bit CPU with PEROM on a monolithic chip the Atmel AT89C51 is powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications The 89 51 provides the following standard features 4K Bytes of PEROM 128 bytes of RAM 32 I O lines two 16 bit timer counters a five source two level interrupt architecture a full duplex serial port on chip oscillator and clock circuitry The 89 51 supplies all the necessary timing and high voltage functions required for programming the PEROM array and no extemal support circuits are required Pin Out 89C51 PSEN P2 7 A15 P2 6 14 P2 5 13 P2 4 A12 P2 3 A11 P2 2 A10 P2 1 A9 D MCS 51 is a registered trademark of Intel Corporation 12 3 30 89 51 Block Diagram REGISTER a a lt gt PSEN g ALE PROG TIMING Vpp contro 5 RST od P0 0 P0 7 P2 0 P2 7 PORT 0 DRIVERS PORT 2 DRIVERS PORT 0 PORT 2 LATCH LATCH PROGRAM
27. ternations Should a load cell has b d beso set to prevent un authorized settings devices are properly set After servicing itis nec n replaced make sure that the protection essary to go throughall tests and procedures nsur th scale meets all the meteorological and approval requirements Here are some features of the PS series Zero indicator Tare indicator Negative value indicator Subtractive tare func Power on zero functio Manual zero function Auto Power Saving Fun 1 i gt Q N P tion n ction Dual power By built in rechargeable battery and external AQDC power adaptor 9 Low battery warning s AC DC power adaptor Dip Switch to prevent Optional EL backlight O1 ignal Dual color charge status indicator 2 Types of Calibration Overload protection against positive and negative force adjustable feet included end user calibration facility 2 SPECIFICATION 2 1 SYSTEM BLOCK DIAGRAM with ROM nn Ed SUPPLY DAPTOR 9 500 ECHARGEABLE BATTERY 6V 4Ah Description When an article is placed on the platter the load of the article is applied to the load cell inside the scale The resistance to the excitation current in
28. the strain gauge will then changed and the analog output signal varies It is amplified and digitized continuously by the A D converter into a digital signal Subsequently the resulting count is processed and managedbytheCPU TheCPUreferstotheinstructions fromthe keyboard and then conveys the outputdata to LCD driver which formats the data into readout on the display panels 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION LOAD ELL DC JACK 7 2 3 GENERAL SPECIFICATION 2 3 1 Overall View 2 3 2 Overall Dimension 280 W x 330 2 3 3 Platter Size 280 X 330mm D x 455 2 3 4 Model Specifications Model Number Capacity Division PS 3000 3000g 0 54 5 6000 60004 142 PS 12K 12kg 2g 5 30 30kg 5g 5 30005 30004 lg 5 60005 60004 24 5 15 5 15kg 5g PS 30KS 30kg 10g Tare Range Full Tare Power on Zero Range 110 5 Manual Zero Range 125 5 Operation 0 40 C 1 32 104 F Environment Non condensed R H 85 Power Consumption Normal 0 1W Charging 5W Power Source Built in Rechargeable Battery or AC DC Powel Adaptor DC9V 500mA Weight Net Gross Weight 8 4 9 4kg 2 3 5 Main Component Microprocesso Crystal Oscillator s Used 89C51 6MHz rs
29. tures a differential analog input as well as a dif ferential reference input It operates from a single supply 3 V or 5 V It can handle unipolar input signal ranges of 0 mV to 20 mV 0 mV to 80 mV 0 V to 1 25 V and 0 V to 42 5 V It can also handle bipolar input signal ranges of 20 mV 80 mV 1 25 V and 2 5 V These bipolar ranges are referenced to the negative input of the differential analog input The AD7715 thus performs all signal conditioning and conversion for a single channel system AD7715 15 ideal for use in smart microcontroller or DSP based systems It features a serial interface that can be config ured for three wire operation Gain settings signal polarity and update rate selection can be configured in software using the input serial port The part contains self calibration and system calibration options to eliminate gain and offset errors on the part itself or in the system SPI and QSPI are trademarks of Motorola Inc MICROWIRE is a trademark of National Semiconductor Corporation Protected by U S Patent No 5 134 401 See page 30 for data sheet index REV B Information furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Ana
30. voltage supply inputs 6 Vss Ground 7 33 Voo Power 8 SCK Serial clock input 9 Si Serial input 10 cs Chip select BUSY Busy output 2 c o Command or data select input 13 RESET Reset input 14 NC No connection 15 18 COMg COM LCD backplane driver outputs 19 32 34 51 50 53 LCD segment driver outputs 52 Ctt System clock input 34 116 5 V A PITCH 15 8X5 79 0 36 V A Date APPROVAL CHECK Drawn 33 UOI 3 8 REV Date BY wont SCALE UNIT DATE APPROVAL 6289 CHECK SEGMENT DRAWN 7721 36 v20 C0C 38 1a L so iz Livi ain 3955 538 0 2M TTZT I3 gy ong AQNYS NAvNO OMG
Download Pdf Manuals
Related Search