UFM Service Manual
Contents
1. PLT 165 R 0906000210 ISCD 021 BLACK F OOOSFW 0100 ALUMINUM HOUSING UNDER FW SERIES 1600060400 RECHARGEABLE BATTERY 6V F0013FW0001 BATTERY CLAMP FW SERIES 121 8 0 5t ZIUFM NAME PLATE SERIES 20010001310 SCREW RAFADD 0000012 P C B FM 12 X G0001FM0200 PLASTIC HOUSING UPPER FM SERIES WHITE C1W10000000 PANEL PC 200 78 2mm TRANSPARENT C1AFM030000 OVERLAY 1208020351 BATTERY WIREARRAY 2 35cm SINGLE HOUSING 1208020601 BATTERY WIREARRAY 2 60cm SINGLE HOUSING 1204011300 CONDUCTIVE WIRE 30 BLACK 1204040370 WIRE ARRAY 4 PIN 37cm 1007000001 FERRITE CORE TR 16 9 28mm 1007000004 FERRITE CORE 28 3 13 8 13 5 422. year ww week v version identifier process identifier L 3 0V 3 6V C 4 5V 5 5 bh working clock in MHz 25 40 k package type postfix fas below table 8 Bit wm 32KB flash 8 RAM embedded Features Working voltage 3 0V 26V For L Version 45V 5 5V For C Version Genera 8052 fami compatible 12 clocks per machine cycle 32 KB internal f ash memory 1024 bytes data RAM 16 bit timers countere Four S bit ports for PDIP package Four 8 bil ports one 4 bit VO poris for PLCC ar package Full serial channel Bit Operation instruction Page free jumps 8 unsigned division bit unsigned BCD operations Direct ac3ressin Indwect addressing Nested interrupts Two priority level niemols VO port Power save modes mode and power dyan Code protection function One watch dog Umer NOT Low inhibit ALE AF 1 Creation Road 1 Science based Industrial Park Tawan 30077 TEL 662557290 Speciiicatons subject change wihout contact your seas epresentaives for the mos recent information 1 19 Verll PID 8958 05 01 31 SyncMOS Technologies Inc SM8958 May 2001 Pin Configurations 8522 6843977808 posan P Po 5405 x P
3. ii _ E s 2 A 3 MT Of See omc ecececoseds oboe gt P 9 9 9 12 1 LAYER 23 COMPONENT SILK SCREEN 11 n TO PRINTER cH 12 1 I AM RI 40 12 48 5V 42 10 RS 232 yp 8 gt AM AD7705 52 1 5 43 8 R40 o 18 3325 m EEE 9 855 2 835 EN 09 RH Wess As i uto R44 NR3 5 ws AM OBAT M C4 5 m AM AM T R26 AM AMW 88 R4 11 4 m 7 Cu 028 Di cu CH N B2 5 c2 p R4 028 C61 052 825 0000 3 T 823 U us 05 C
4. 79 P14 R32 5 1042 1042 0 533 Hs 3 I GND 12 A1 532148 10 6275 PD 340 NCH A2 551117 F R31 PAT TSK NCZ 540 530 10K P10 cs VCC VSS 529 45 VLCD 528 28 BPO 527 AE P27 55 LOBAT 5261 P26 57 STROBE COMCO 31 BP2 225 Ht ed P25 P25 BP3 524 25 40 P CON so B suum P22 23 P22 52 521 E P21 22 3 20 871 20 20 54 518 5 100 211 08015210 7 EH BH NTA 13 10 9 57 516 Gea 55 R17 10K 58 515 PSEN 59 814 TXD i ALE PROG 50 513 RXD RXD 5 00 111 s S12 5 6112 211 BUSY CAL NRI wt INTO INTO ay P17 L C Pt ON OFF swt 5 gt 5 4 OND NH SW2 ZERO 6 Di 45V INI par 1N4148 INVERTER 601 1 SWS TARE P20 5V V R4 P20 Pis i d 1k EL SW4 MR 1 P21 34 POWER OUT P22 Osm 5V k gag Lo s uu e 923 02 A A 1042 2 ES 21 4 184148 V reum 7 652 54 0611 29 gt sja LOBAT f DLOBAT P20 1009 100P 100 100 100P AUTO OFF AUTO OFF GND id 4 et 4 TO KEYBOARD BACK LIGHT OPTION L 4 NR2 10K 9P 45V 74HC374 20 4 1047 3 6 CO PRINTER Di L So HO C0N 12P WF Title 00 Tol 2 1 i 12 D q RXD lt H A Dt Ben H 2 1 IN 2 y pb 10 3 TO 85 252
5. the CPU will release a low to high pulse signal to toggle U5 then 01 cuts off indicator will be shut down immediately 17 5 Low Power Detection The Q2 A733 is designed to detect the power level When battery powerislessthan5 5V thecollectorpolewillbecome lowpotential then CPU will instruct LCD display to show LO BAT symbol 3 2 1 2 Input voltage 5 5V or higher Check and recharge battery if voltage is less than 5 5V 3 2 1 3 System voltage Vcc 5V 4 10 Check that the system voltage is within 5V 10 a less than 4 5V the CPU may not work properly b more than 6V ghosting will appear on LCD 3 2 2 Platform Overload Stop Make sure that the platform does not interfere with anything when weighing Check that the platform does not touch the upper no load and or lower full load overload stops 3 2 3 LCD Display Checking 3 2 3 1 Check that it is soldered and connected properly between LCD and driver IC PCF8576 driver IC PCF8576 and CPU 3 2 3 2 Check whether LCD is broken 3 2 4 CPU Checking 3 2 4 1 Check that all pins are seated properly into the socket 3 2 4 2 Check that the Crystal Oscillator works 3 2 4 3 Check the RESET is normally low 3 2 5 A D Unit Checking 3 2 5 1 Check that the A D unit is correctly fed with 5VDC power 3 2 5 2 Check that the signal output of loadcell is normal 3 2 5 3 Check OP Amplifiers amp A D Converter
6. 0010850090 COPPER NUT M8 1 25P 9H 11 7 70010000410 SCREW M4 0 7P 10L ROUND HEAD 12 3 5001000005 WIRECLAMP UC 05 13 1 F0007NBS101 5 5 PLATE NBS 14 1 lAFM030000 OVERLAY AFM SERIES 16 1 C1W10000000 PANEL PC 200 78 2mm TRA NSPA RENT 17 1 G0001FM0200 PLASTIC HOUSING U PPER FM SERIES 18 1 E1FM0000012 FM 12 X MAIN BOARD 19 1 G0001NBS020 PLASTIC HOUSING UNDER NBS SERIES 20 1 UFM SERIES 21 2 20011000412 SCREW M4 0 7P 12L FLAT HEAD 22 1 0906000220 C JACK SCD 022 BLACK 23 1 1600060300 RECHARGEABLE BATTERY GP3 6 6V 24 1 0007 85102 BATTERY CLAMP NBS SERIES 25 4 20010001310 SCREW TAPPED 39101 26 2 Z0010000512 SCREW M5 0 8P 121 27 1 60001485100 SWIVEL NBS SERIES 28 1 G0001NBS101 SWIVEL ADJUSTING LEVER NBS SERIES 29 1 Z004100725 SPRING 100725 30 1 0007 85200 SWIVEL FIX PLATE NBS 31 1 45001000301 CABLE TIE 1205 32 5 20010001305 SCREW TAPPED 3 5L 33 1 1208020601 BATTERY WIRE 2PIN 60cm SINGLE HOUSING 34 1 A1207050471 CABLE SPIN PLT 165 AD 47CM 35 1 40905600501 CONNECTOR PLT 165 P 36 1 0004 85002 S S PILLAR NBS Dia 38 58cm 2mm 37 1 45005000090 BUBBLE LEVEL DM Dia 14mm 38 1 0007 85000 PILLAR SUPPORT NBS 39 4 20014000612 SCREW M6 1P 12L HEX HEAD 40 1 A1007000004 FERRITE CORE T 28 3 13 8 13 5mm 4l 1 1007000006 FERRITE CORE 22 5 13 8 19 2 42 1_ 1204011300 COND
7. 04 7 6 5 els DS 14150 505 40 9 Drawing Revision D 13140 40 FI wing 4 5D 5Q 4 susy 1 11 D3 2 RS232 OPTION 46 Size Sheet 1 of 2 Date 90 12 07 Drawn by 7 8 20 as 1061 y un ay c51 23 AIC1722 50CZL CON 2P P ps 1000uF 16V 04 Rot 1042 771577 1O0uF gt 3 1 2 vo 1N4002 I GND tle L C25 5 26 1 10k 1042 1047 C945 47 1 R20 R23 N4148 x 1 E CON 2P PN E 15 R43 cfe R25 15K lt 2 1 SWI wor 4 R44 5 5 lt 5 b2 AC 9V INPUT 1 220R AM a siz T 1 TO BATTERY 4 8 berk 201 06 6 1 USB 82V tes M vDo 4127 628 Pu 8 R22 tI auto orr 7 ii 2 M 4 IN lt 024 1042 T GREEN RED LOBAT RAB 470R 4 Title n Drawing Revision Size Sheet 2 of Date 90 12 07 by 7 8 21 5VA C
8. 5 1 4W 1 4W 1500 1 4W 4 7 1 4W 1000 1 4W 10KQ 1 4W 5600 1 4W DSS 306 55Y5S471M100 4 9152MHZ 7705 52 1 UPPER 7705 52 1 UNDER M3 6 168 0 68 0mm 5V TO 120V 74HC374 12 PIN WAFER D SUB 25 12 19 6 5 32 CLAMP TYPE 10 X1 21 SW1 6 Q1 03 1 6 8 9 16 17 R9 SPAN R3 6 R10 R13 14 R16 R15 1 3 X2 EL 1 014 26 29 RS232 OPTION A0901010040 E1HBW100000 CONNECTOR Re GSB 4 PIN WAFER HBW SERIES RS232C 1B1 J2 30 5 APPENDIX SyncMOS Technologies Inc 5 8958 2001 Product List 5 8958125 25 MHz 32KB internal memory MCU SM8958C25 25 MHz 32KB internal memory MCU SM8258C 40 40 MHz 32K8 internal memory MCU Description The 5048958 series product is an 8 bit sangle chip micro controler with 32KB flash 5 1 RAM embeddec of the 8052 micro controller famiy With its hardware features powerful instruction set its straight forward to make a versatile and cost effective controller for those applications which cemand up lo 32 1 pins for PDIP package or up to 36 VO pins for PLCC package or applications which need up to 32KB memory either for program or for data or mixed program the on chip flash memory commercial writer available to do Il in parallel programming method Ordering Information yywwy
9. A0805021101 A0805041101 A0805041102 A0805041103 A0805041105 A0805041153 A0805041205 A0805041223 A0805041272 A0805041471 A0805041472 A0802010305 A0802010309 A0902010020 A0907010030 A0910111020 5 TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR DIODE DIODE BRIDGE ZENER DIODE L E D CAPACITOR EC CAPACITOR EC CAPACITOR EC CAPACITOR EC CAPACITOR MLC CERAMIC CAPACITOR CC CERAMIC CAPACITOR CC METAL FILM RESISTOR METAL FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR RESISTOR NETWORK RESISTOR NETWORK CONNECTOR CONNECTOR MINI JUMPER 40 PIN A733 25 945 1061 0880 1515 1N4002 1 4148 1106 1A 1 2W 8 2 9 GREEN RED ROUND 5mm 10uF 25V SS TYPE 100uF 16V 1000uF 16V 470uF 16V 1042 30p 50V 30 100 50 101 50 L 4W 500KQ L 4W 20 2W 000 2W 000 AW KQ AW LOKQ L 4W MQ AW 5 AW 2 0 AW 22KQ AW 2 7 L 4W 470Q 4W 4 7 L 4W 10KQ 5 PIN 10KQ 9 PIN 2 PIN WAFER PITCH 3 9mm 1 3 PIN 180 PITCH 2 54 15 07 02 5 04 Q6 01 3 D5 D1 4 201 LED1
10. AD7705 18 When no error is found with the above checking procedures the trouble be caused by the loadcell or the PCB itself Replace with a new one will help to identify the defective part Following the replacement of any parts it is important that the scale be recalibrated again 19 4 ELECTRICAL CIRCUITRY 4 1 SCHEMATICS CAL 11 p c39 AD 200 89652 43 C44 EV 33 10uF 16V m 100P 100P E 576 042 R35 100R 83858 p y p k c34 vss 204 R36 1006 24561 538 22 k XTAL2 5 T SYNC 537 33 my P17 CLK 536 gt lt ul P16 CAL 5 VDD S35 9 RESET P15 AUTO OFF 93LC46 42 osc 534 VW P
11. Very low external component count most resistor even in multiple device applications Compatible with chip on glass technology Manufactured in silicon gate CMOS process 2 GENERAL DESCRIPTION The 8576 is a peripheral device which interfaces to almost any Liquid Crystal Display LCD with low multiplex rates It generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 40 segments and can easily be cascaded forlarger LCD applications The PCF8576 is compatible with most microprocessors microcontrollers and communicates via a two line bidirectional 12 Communication overheads are minimized by a display RAM with auto incremented addressing by hardware subaddressing and by display memory switching static and duplex drive modes PACKAGE DESCRIPTION VERSION PCF8576T plastic very small outline package 56 leads SOT 190 1 PCF8576U chip in tray PCF8576U 2 chip with bumps in tray 57805 PCF8576U 10 chip on film frame carrier FFC o PCF8576U 12 chip with bumps on film frame carrier FFC 2001 Oct 02 3 35 12042 3 _ 16871 oB t 166 VA XN 1 30V 1 4 DUTY 1 3 BIAS 64 Hz saw 2 WING DIRECTION 1 12 HR 3 TERMINAL WIDTH 15 127 MM M
12. 120 25010 0 02kg 0 051b 420 x 520mm UFM F 300 300kg 6001b 0 05kg 0 11b UFM L60 60kg 1201b 0 01kg 0 021b UFM L120 120 4 25015 0 02kg 0 051b EO ae eon UFM L300 300 6001 0 05kg 0 11b UFM L600 600kg 12001b 0 1 4 0 21 Class Full Range Subtractive Range Power on Zero 10 Ranqe Manual Zero 2 Range Minimum Load 20e Operation 0 40 C 32 104 F Environment Non condensed R H lt 85 Power 0 10 Consumption 2 3 3 Main Components Used Microprocessors SM8958A Crystal Oscillator 11 0592MHz Display Device WIN Liquid Crystal Display 2 3 4 Analog Specification Electronic self indicating device with single or multi interval indication The maximum number of verification scale intervals will be n lt 6000 for class QD instruments or n lt 1000 for class instruments Power supply of 5 V DC Minimum signal voltage per verification scale interval is 1 5 pV 16 bits serial digital output Excitation power supply for the load cell is 5 V Minimum input impedance of the load 11 is 85 Q Maximum cable length for the connection between the indicator and the junction box or load cells when more then one load cell is connected is 1 m mm The analog data processing unit is built in a closed metal box 2 4 INTERNAL SETTINGS AND CALIBRATION METHOD
13. and the analog output signal varies in proportion to the load applied 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 output data to LCD driver which formats the data into a readout on the display panel 2 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION LOAD CELL 5 PIN CONNECOTR PLATFORM RECHARGEABLE BATTERY 6V 4Ah INDICATOR RS4232 BOARD RS 432C 1B1 D SUB 25 FEMALE RS232 222 7455 1 uo 93 0 0 5 MAIN BOARD 12 2 2 1 CONNECTION BETWEEN INDICATOR AND PLATFORM 5 PIN ROUND CONNECTOR PIN ASSIGNMENT x EXC SIG INDICATOR PLATFORM PIN 1 E 5 BLACK PIN 4 S PIN 5 GND E EXC LOAD CELL s 2 2 2 CONNECTION OF RS 232 BETWEEN INDICATOR AND PC 25PIN D SUB PIN ASSIGNMENT INDICATOR 25PIN D SUB FEMALE
14. function a Refer to the 2 4 1 on how to enter F4 b Press MODE to shift between 0 OFF and 4 OFF 14 To disable the AUTO POWER OFF function select 0 77 employ the AUTO POWER OFF function select 4 e Press TARE to save and return to other function 2 4 6 RS 232 Transmission Setting F5 a Refer to the 2 4 1 on how to enter F5 b Press M to select baud rate of 4800 9600 and 19200 C Press MODE to enter transmission protocol selection and press M to select Pzn81 or 71 d Press TARE to save and return to other function Note The default value is Baud Rate 9600 DATA BIT 8 PARITY BIT N NONE STOP BIT 21 CODE ASCII 2 4 7 AVERAGE FUNCTION F6 a Refer to the 2 4 1 on how to enter 6 b Press MODE to select FiLt 0 FiLt 1 To disable the AVERAGE FUNCTION select FiLt 0 To employ the AVERAGE FUNCTION select FiLt 1 C Press TARE to save and return to other function 2 4 8 Data Output Setting F7 a Refer to the 2 4 1 on how to enter F7 b Press MODE to select data output format of SEr 1 or SEr 2 When selects SEr 1 scale will transmit data continuously via RS 232 when reading is stable When selects SEr 2 data will transmit single data via RS 232 when pressing M C Press TARE to save and return to other function 2 4 9 DATA PRINTOUT FORMAT F8 a Refer to the 2 4 1 on how to enter F8 b Press MODE to select da
15. itself or in the system CMOS construction ensures very low power dissipation and the power down mode reduces the standby power consumption to 20 uW typ These parts are available in 16 lead 0 3 inch wide plastic dual in line package DIP a 16 lead wide body 0 3 inch small outline SOIC package and also a low profile 16 lead TSSOP PRODUCT HIGHLIGHTS 1 The AD7705 AD7706 consumes less than 1 mW at 5 V supplies and 1 MHz master clock making it ideal for use in low power systems Standby current is less than 8 uA 2 programmable gain input allows the AD7705 AD7706 to accept input signals directly from a strain gage or trans ducer removing a considerable amount of signal conditioning The AD7705 AD7706 is ideal for microcontroller or DSP processor applications with a three wire serial interface re ducing the number of interconnect lines and reducing the number of opto couplers required in isolated systems 4 The part features excellent static performance specifications with 16 bits no missing codes 0 003 accuracy and low rms noise lt 600 nV Endpoint errors and the effects of temperature drift 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 34 Philips Semiconductors Univer
16. to compensate the difference in gravity value a Refer to the 2 4 1 on how to enter 21 b Use MODE to shift to next digit and use ON ZERO to increase the value c Press and hold MODE to save and return to other functions 13 2 4 14 CALIBRATION METHODS DEALER CALIBRATION a Hh O O D Q Turn indicator off Press and hold TARE then press ON OFF Indicator displays F1 Press MODE to enter dealer calibration Press and hold MODE for YES and indicator will self calibrate zero A point before proceeding to the first point calibration Load the mass according to the display normally the first point is 1 3 of the full capacity Press MODE when display is flashing Indicator displays CAL 2 Press MODE for YES or ZERO to exit Load the mass according to the display normally the second point is the 2 3 capacity Press MODE when display is flashing to complete the calibration procedure AUTO CALIBRATION a Cs d Turn indicator off Press and hold MODE then press Indicator displays CAL 1 Press MODE for YES and indicator will self calibrate zero point before proceeding to the first point calibration Load the mass according to the display normally the first point is 1 3 of the full capacity Press MODE when display is flashing Indicator displays CAL _2 Press MODE for YES or ZERO to exit Load the mass acco
17. 24 050 034 047 022 AM mo L 53 AM AM 5 25 20 v LI 5 1 C51 BR AC IN 05 DC IN 12 1 OVERLAY KON 30 02 1001 EH Ewe 9 9 swe 12 1 BOTTOM OVERLAY 24 5 BILL OF MATERIAL STRUCTURE Parts No Description Specification Qty Remark UFM B SERIES A1007000006 FERRITE CORE T 22 5 13 8 19 2mm 1007000004 T 28 3 13 8 13 5mm A1204040370 WIRE ARRAY 4 PIN 37cm C1W10000000 PANEL PC 200 78 2mm TRANSPARENT G0001NBS000 PLASTIC HOUSING UNDER NBS SERIES INDICATOR G0001FM0200 PLASTIC HOUSING UPPER FM SERIES WHITE INDICATOR 1 030000 OVERLAY SERIES 1 0000012 12 MAINBOARD 11600060300 RECHARGEABLE BATTERY 6V 3Ah A1208020351 BATTERY WIRE ARRAY 2PIN 35cm SINGLE HOUSING A1208020601 BATTERY WIRE ARRAY 2PIN 60cm SINGLE HOUSING F0013NBS000 BATTERY CLAMP NBS SERIES 78 10 03 5 2 A6000120950 ADAPTOR US TYPE 120V 9V 500mA UL APPROVED G0001NBS100 PILLAR SWIVEL NBS SERIES G0001NBS101 SWIVEL TENON NBS SERIES A0906000220 DC JACK SCD 022 BLACK A1207050471 CABLE 5PIN PLT 165 AD 47CM A0045040350 LOAD CELL 042 50KG UFM B 30 A0045040410 LOAD CELL 042 100K
18. 7706 The AD7705 AD7706 with 3 V supply and a 1 225 V reference can handle unipolar input signal ranges of 0 mV to 10 mV through 0 V to 1 225 V Its bipolar input signal ranges are 10 mV through 1 225 V The AD7705 AD7706 thus perform all signal conditioning and conversion for a two or three channel system The AD7705 AD7706 are ideal for use in smart microcontroller or DSP based systems They feature a serial interface that can be configured for three wire operation Gain settings signal polarity and update rate selection can be configured in software Protected by U S Patent Number 5 134 401 SPI and QSPI are trademarks of Motorola Inc MICROWIRE is a trademark of National Semiconductor REV Information furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its nor for any infringements of patents or other rights of third parties which may result from its use Mo license is granted by implication or otherwise under any patent or patent rights of Analog Devices FUNCTIONAL BLOCK DIAGRAM Vpp REF IN REF IN AD7705 AD7706 CHARGE BALANCING A D CONVERTER ANALOG INPUT CHANNELS SERIAL INTERFACE REGISTER BANK MCLK IN C SCLK MCLK OUT D DIN DOUT GND DRDY using the input serial port The part contains self calibration and system calibration options to eliminate gain and offset errors on the part
19. G UFM B 60 A0045040420 LOAD CELL 042 200 UFM B 150 A0905600501 CONNECTOR 165 0002 50000 5 5 PLATTER BS SERIES 460 335 17 0100 5000 ALUMINUM PLATFORM BASE BS SERIES G0004NBS000 ADJUSTABLE FEET 5 54 4145 16 240 4 F0007NBS000 PILLAR SUPPORT BS SERIES F0007NBS101 S S COVER PLATE BS SERIES FOR PILLAR SUPPORT F0004NBS001 PILLAR BS 38 58cm 1 2mm 20043000002 T TYPE SEALING RING M 1605 RLE 2 A5005000091 BUBBLE LEVEL D14 G0030000200 BUBBLE LEVEL HOLDER 20 12 Y0005000000 SEALING PARTS FOR INDICATOR Y0005000002 SEALING PARTS FOR PLATFORM 25 UFM F SERIES A0905600500 A1007000001 A1007000004 A1204040370 C1W10000000 F0005FW0100 G0001FM0200 C1AFM030000 E1FM0000012 A1600060400 A1208020351 A1208020601 F0013FW0001 A6000120950 A0906000210 A0004600410 A0004600415 A0004600450 A0905600501 F0002FW0000 F0100FW0001 G0004FW0000 F0007FW0002 F0007FW0200 F0004FW0000 20043000002 5005000091 60030000200 0005000000 0005000002 UFM L SERIES A0905600500 A1007000001 A1007000004 A1204040370 CONNECTOR FERRITE CORE FERRITE CORE WIRE ARRAY PANEL PC ALUMINUM HOUSING UNDER PLASTIC HOUSING UPPER OVERLAY PC PCBs RECHARGEABLE BATTERY BATTERY WIRE ARRAY BATTERY WIRE ARRAY BATTERY CLAMP ADAPTOR US TYPE DC JACK LOAD CELL LOAD CELL LOAD CELL CONNECTOR S S PLATTER ALUMINUM PLA
20. ND GRADUATION For Single interval it means Max x e for Dual Interval it means x e a Press M when display shows CAP2 and utilize M to increase value MR to move cursor to the next digit b The graduation is limited to maximum of 1 6000 when type NTEP is selected It must be set to validate the change C Press MODE to save and continue setup TO SET DUAL INTERVAL x When type NORMAL is set display will now show 1 to allow setup for dual interval a Press M when display shows and utilize M to increase value MR to move cursor to the next digit The default value is 50 of the capacity set in CAP2 The graduation also must be set to validate the change C Press MODE to save and complete the setup NOTE 1 You must reset capacity every time when you change the type between NTEP and NORMAL NOTE 2 When NTEP type is selected indicator will automatically limit users to program the configuration under 1 6000 When NORMAL type is selected indicator will automatically allow users to program the configuration under 1 30000 NOTE 3 When setting up capacities users must program all digits including division before pressing MODE to complete set up 2 4 5 Auto Power Off Setting F4 This unit is equipped with AUTO POWER OFF function Default setting auto off after 4 minutes of idle time Follow the steps below to disable enable the AUTO POWER OFF
21. NENTS TROUBLE SHOOTING 3 2 3 2 1 Power Supply Checks 3 2 CON 2P PW C25 CON 2P PW 1 1 Relevant parts Main Board FM 12 X 01 A1515 Q2 A733 U5 IC 4027 011 1722 5 0 Q5 C1061 04 C945 ZD1 ZENER 8 2V R51 1 2R 1 2W DC JACK BATTERY 6V 4Ah 106177 V un 1722 50021 cog 01 09 1000uF 16V 04 RSI 1042 1515 27 100uF 16V s 100 16 1N4002 AC SV INPUT C20 870 vo 59 GND 1 b 28 1 2 c26 oaz 041 23 5 1 5 H CON 2P PW T 2 T 1 2 5 1 2 1 4 8 n 058 4027 1 R22 W 022 X VIN 4 or s Description 1 2 Power source Rechargeable Battery 6V 4Ah or AC adaptor 9V 500mA 5V power drives digital circuit system 011 1722 5 0 is 5volts Voltage Regulator 5V power drives analog circuit system U4 AS2950A is a 5 volts Voltage Regulator Auto off If the indicator is set to 4_oFF of power saving function or under LO BAT situation after fixed time interval normally 4 minutes
22. PC 25PIN D SUB MALE PIN 1 SHIELD PIN 1 SHIELD PIN 2 RXD PIN 2 3 TXD PIN 3 4 RTS PIN 4 RTS PIN 5 TS PIN 5 CTS PIN 6 DSR PIN 6 DSR PIN 7 GND PIN 7 GND 8 DCD PIN 8 DCD PIN 20 DTR PIN 20 DTR RTS amp CTS have been shorted internally BAUD RATE 4800 9600 DEFAULT 19200 Protocol N81 DEFAULT E71 Press M to output a reading of individual Code ASCII Data output Continuous DEFAULT or M MC key Press MC to output the total of readings transaction 2 2 3 Parallel Printer Interface D SUB 25 pin PIN ASSIGNMENT PIN NUMBER ASSIGNMENT PINNUMBER ASSIGNMENT 1 STROBE 7 D5 2 DO 8 D6 3 D1 9 D7 4 D2 Ash BUSY 5 D3 25 GND 6 D4 2 3 GENERAL SPECIFICATION 2 3 1 Overall View UFM SERIES 5 x Indicator Dimension UFM B 250 W x 80 D mm x 150 H UFM F L 250 W 130 D mm x 150 Overall Dimension 330 x 450 0 750 H mm 420 520 D 880 H mm UFM L 500 W x 600 D x 880 H mm 2 3 2 Model Specifications Model No Capacity Readability Platform Max e UFM B30 30kg 601b 0 01kg 0 021b UFM B60 60kg 1201b 0 02kg 0 051b 330 x 450mm UFM B150 150kg 3001b 0 05ko 0 11b UFM F60 60kg 1201b 0 01 0 0210 120
23. S 12 internal settings available as below table Function Symbol Description 1 F1 Offset value reading 2 2 Full LCD display segment checking 3 F3 Span value reading Configuration Setup 4 F4 Auto power off setting 5 F5 RS 232 transmission setting 6 F6 Average function setting 7 F7 Data output setting 8 F8 Printout format setting 9 Auto tare function setting 10 F19 1 30000 verification mode F20 C G gravity of calibration location 21 U G gravity of locationof installation 2 4 1 How to Enter the Functions Required m Press and hold TARE and turn scale on by pressing ON OFF The scale shows F1 Press TARE until the desired function number appears Press MODE to enter selection Press TARE to save and continue selection Press ZERO to quit to restart the scale 4 2 Offset Value Reading F1 Remove all loads from platform Enter F1 through procedures as described in 2 4 1 The display shows the offset value 2 4 3 Full Segment Display F2 a Refer to the 2 4 1 on how to enter F2 b All display segments will light up Check all digits and arrow indications to verify any defects errors d Press TARE to quit 2 4 4 Span Value Reading Configuration Setup F3 The UFM series is designed according to NTEP and Measurement Canada requirements with maximum resolution legal for trad
24. TFORM BASE ADJUSTABLE FEET PILLAR SUPPORT STEEL PLATE PILLAR T TYPE SEALING RING BUBBLE LEVEL BUBBLE LEVEL HOLDER SEALING PARTS SEALING PARTS CONNECTOR FERRITE CORE FERRITE CORE WIRE ARRAY 5 PIN PLT 165 R TR 16 9 28mm 1T 28 3 13 8 13 5mm 4 PIN 37cm 200 78 2mm TRANSPARENT FW SERIES FM SERIES WHITE AFM SERIES FM 12 X MAINBOARD 6V 4 2PIN 35cm SINGLE HOUSING 2PIN 60cm SINGLE HOUSING FW SERIES 121 8 0 5t 120V 9V 500mA UL APPROVED SCD 021 BLACK 263 100KG 263 150KG 263 500KG PLT 165 P FW SERIES 400 500 FW SERIES FW SERIES FW SERIES FW SERIES FW SERIES 70cm M 1605 RLE 14 20 12 5 PIN 165 TR 16 9 28mm T 28 3 13 8 13 5mm 4 PIN 37cm INDICATOR INDICATOR UFM F 60 UFM F 120 UFM F 300 FOR PILLAR SUPPORT FOR INDICATOR FOR PLATFORM 26 C1W10000000 F0005FW0100 G0001FM0200 C1AFM030000 E1FM0000012 A1600060400 A1208020351 A1208020601 F0013FW0001 A6000120950 A0906000210 A0004600410 A0004600415 A0004600450 A0004600475 A0905600501 F0002FW0010 F0100FW0015 F0100FW0016 G0004FW0000 F0007FW0002 F0007FW0200 F0004FW0000 20043000002 5005000091 60030000200 0005000000 0005000002 12 0 0000012 40102000275 40201089582 40202093461 40205040270 40207017225 0208085760 PANEL ALUMINUM HOUSING UNDER PLASTIC HOUSING UPPER OVERLAY PC RECHARGEABLE BATTERY BA
25. TTERY WIRE ARRAY BATTERY WIRE ARRAY BATTERY CLAMP ADAPTOR US TYPE DC JACK LOAD CELL LOAD CELL LOAD CELL LOAD CELL CONNECTOR S S PLATTER ALUMINUM UPPER PLATFORM BASE ALUMINUM UNDER PLATFORM BASE ADJUSTABLE FEET PILLAR SUPPORT STEEL PLATE PILLAR T TYPE SEALING RING BUBBLE LEVEL BUBBLE LEVEL HOLDER SEALING PARTS SEALING PARTS MAINBOARD L C D VOLTAGE REGULATOR 200 78 2mm TRANSPARENT FW SERIES 5 5 WHITE SERIES 12 MAINBOARD 6V 4Ah 2PIN 35cm SINGLE HOUSING 2PIN 60cm SINGLE HOUSING FW SERIES 121 8 0 5t 120V 9V 500mA UL APPROVED SCD 021 BLACK 263 100KG 263 150KG 263 500KG 263 750KG PLT 165 P FW SERIES 500 600 1 2t PF4 SERIES 610 510 62 PF4 SERIES 581 483 57 FW SERIES FW SERIES FW SERIES FW SERIES 70cm M 1605 RLE D14 20 12 FM 12 X UTN G275JV 2W SM8958A 93C46 4027 1 1722 50 2 8576 INDICATOR INDICATOR UFM L 60 UFM L 120 UFM L 300 UFM L 600 FOR PILLAR SUPPORT FOR INDICATOR FOR PLATFORM LCD1 U7 U10 US 011 08 27 A0300000040 A0401007330 A0401009450 A0401010610 A0401015150 A0501004002 A0501004148 A0502000001 A0503020082 A0625050000 A0701106017 A0701107016 A0701108016 A0701477016 A0730104050 A0740030050 A0740101050 A0804041503 A0804045003 A0805020120
26. U27 20 39 39 C49 C51 C20 C19 21 26 40 42 45 46 49 53 66 C33 34 C29 43 44 47 50 52 54 61 R26 R27 R51 R50 R35 36 R20 25 32 41 R17 24 31 38 55 R22 23 R37 43 R21 R28 R29 R48 R40 NR1 NR2 3 1 1 28 A1100211059 A1500000004 A1306000003 A5004000004 CRYSTAL BUZZER TACT SW HEAT SINK A D SECTION A0203077050 A0206000072 A0207029500 A0702226016 A0713105063 A0730104050 A0740047050 A0740101050 A0803041002 A0803041501 A0803043001 A0803041500 A0804044701 A0805041101 A0805041103 A0805041561 A1008000001 A1100249152 F0015000012 F0015000013 20010000305 BACK LIGHT A1400000005 A1401005120 L G VOLTAGE REGULATOR CAPACITOR TC POLYESTER FILM CAPACITOR CAPACITOR MLC CERAMIC CAPACITOR CC CERAMIC CAPACITOR CC METAL FILM RESISTOR METAL FILM RESISTOR METAL FILM RESISTOR METAL FILM RESISTOR METAL FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR CARBON FILM RESISTOR EMI FILTER CRYSTAL PROTECTION BOX PROTECTION BOX SCREW OPTION BACK LIGHT EL BACK LIGHT INVERTER PRINTER OPTION 0204743742 0901010120 1250251220 1007000011 EC CONNECTOR WIRE ARRAY FERRITE CORE 11 0592MHZ OBO 15210 KPT 1104B 217 22 AD7705AN OP177 AS2950AW 22uF 16V 226 luF 63V 105 1047 47 50 47 100 50 101 10KQ 1 4W
27. UCTIVE WIRE 30cm BLACK 43 1 60030000200 BUBBLE LEVEL HOLDER 44 1 1208020351 BATTERY WIRE 2PIN 35cm SINGLE HOUSING 41 UFM F L SERIES EXPLOSION DIAGRAM APPROVED NO REV DRAWING NO UFM E 02 A DWG NAME UFM F L SERIES EXPLOSION DIAGRAM F 0002FW 0000 PART NO PART NAME 5 5 PLATTER DESCRIPTION FW SERIES 400 500 REMARK F OLOOFW 0001 ALUMINUM PLATFORM SET FW SERIES UPPER 0004600 LOAD CELL 263 X XXkg F OLOOFW 0001 ALUMINUM PLATFORM SET FW SERIES UNDER G0004FW0000 ADJUSTABLE FEET FW SERIES 120016000012 NUT M 12 1 75P 120014000830 SCREW 8 1 25P 30L 120040001005 WASHER M8 OR 5 16 120014020825 SCREW 8 1 25P 25L 5001000010 WIRE CLAMP 6 85 20015000406 SCREW M 4 0 7P 6L 20010000850 0010850090 SCREW COPPER NUT M8 1 25P 50L 8 1 25 9 0007 0002 PILLAR SUPPORT FW SERIES 60030000200 BUBBLE LEVEL HOLDER 520512 5005000091 BUBBLE LEVEL 014 0007 0200 STEEL PLATE FW SERIES 20014000612 SCREW M6 1P 12L 20013001220 SCREW 12 1 75P 20L 20014000620 SCREW 6 1P 20L 20040001006 WASHER 1 4 F 0004FW 0000 PILLAR FW SERIES 70cm 0905600501 PLT 165 P 0905600500
28. bility to Buffer the Analog Input 2 7 V to 3 3 V or 4 75 V to 5 25 V Operation Power Dissipation 1 mW max 2 3 V Standby Current 8 pA max 16 Lead DIP 16 Lead SOIC and TSSOP Packages GENERAL DESCRIPTION The AD7705 AD7706 are complete analog front ends for low frequency measurement applications These two three channel devices can accept low level input signals directly from a trans ducer and produce a serial digital output They employ a sigma delta conversion technique to realize up to 16 bits of no missing codes performance The selected input signal is applied to a proprietary programmable gain front end based around an ana log modulator The modulator output is processed by an on chip digital filter The first notch of this digital filter can be programmed via an on chip control register allowing adjustment of the filter cutoff and output update rate The AD7705 AD7706 operate from a single 2 7 V to 3 3 V or 1 75 V to 5 25 V supply The AD7705 features two fully differ ential analog input channels while the AD7706 features three pseudo differential input channels Both devices feature a differ ential reference input Input signal ranges of 0 mV to 20 mV through O V to 2 5 V can be incorporated both devices when operating with a Vpp of 5 V and a reference of 2 5 V They can also handle bipolar input signal ranges of 20 mV through 2 5 V which are referenced to the AIN inputs on the AD7705 and to the COMMON input on the AD
29. e at 1 6000 It is also approved for 1 3000 sousers can choose the preferred resolution depending on the working environment When type NTEP legal for trade mode is selected the rated capacity will be limited to maximum of 1 6000 When type normal not legal for trade mode is selected the rated capacity will allowed for amaximum of 1 30000 The indicator also provides option for dual intervals when set TO ENTER FUNCTION a Refer to the 2 4 1 on how to enter F3 b Press MODE to select tYPE NTEP or normal unit metric only or metric imperial conversion support dP decimal point CAP2 capacity and readability CAP1 for dual interval only allowed when type is set in normal mode TO SET TYPE Select between NTEP and non NTEP application a Press M when display shows tYPE and select the operating type of ntEP or norm for normal b Press MODE to save and continue setup TO SET WEIGHING UNIT a Press M when display shows unit and select the weighing unit of kg g lb kg or lb g When it is set kg or g only scale will only display result in metric form but when set to lb kg or 1b g scale will allow metric imperial conversion b Press MODE to save and continue setup 10 TO SET DECIMAL POINT a Press M when display shows dP and select the decimal place from NIL to 3 decimal place b Press MODE to save and continue setup TO SET CAPACITY A
30. intelligent Weighing Technology A Higher Level of Precision A Higher Level of Performance UFM B UFM F UFM L NTEP Bench Scales Maintenance Manual MAINTENANCE MANUAL UFM SERIES NTEP amp MEASUREMENT CANADA CONTENTS 1 INTRODUCTION 2 SPECIFICATIONS 2 1 SYSTEM BLOCK DIAGRAM 2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION 3 GENERAL SPECIFICATIONS 4 INTERNAL SETTINGS AND CAI METHODS 3 TROUBLE SHOOTING 3 1 TROUBLE SHOOTING LOOP 3 2 PARTS AND COMPONENTS TROUBLE SHOOTING 4 ELECTRICAL CIRCUITRY 4 1 SCHEMATICS 4 2 PCB LAYOUT 5 BILL OF MATERIAL 6 APPENDIX JANUARY 2005 REV Specifications and Function Subject to Change without Notice 1 INTRODUCTION The UFM series is designed and programmed according to NTEP and Measurement Canada requirements These indicators sealedto prevent unauthorized access to internal parts End users shouldbe advised not to undertake any trouble shooting except those listed in the operation manual Thismaintenance manual contains 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 mini jumper should be so set to prevent un authorized settings or alterations If a load cell has been replaced make sure that the protection devices are correctly set After servicing i
31. oerags res SM8958 ihhJ 20 7707 351 P43 44L PLCC Top View 2 7 18 o P2 6 14 2 13 28 m D 1 Pm P13 Pia e 88 93 z SROPIS7 XTAL 1 ficatians to without contact z 3 4 3 6 SM8958ihhQ 44L Top View Ver 1 1 PID 8958 05101 32 SyncMOS Technologies Inc SM8958 May 2007 Block Diagram 4 Stack Decoder 1024 bytes imer 2 1 Timer C Porter Register RAM RES Rese to pertinent blocks PC Incremente Program Counter Timing Generator to whole system ALE PSEN Instruction Regrster 32K bytes Flash Pon 0 Mernory Latch ws LH Dr ver amp 4 Por 2 Port 3 Driver amp Mux Criver amp Mux 43 8 Specifications Subject change without notice contact your Sales representatives for Most recent information 3 19 Ver 1 1 PID 2958 05 01 33 ANALOG DEVICES 3 5 V 1 mW 2 3 Channel 16 Bit Sigma Delta ADCs 107705 07706 FEATURES AD7705 Two Fully Differential Input Channel ADCs AD7706 Three Pseudo Differential Input Channel ADCs 16 Bits No Missing Codes 0 003 Nonlinearity Programmable Gain Front End Gains from 110 128 Three Wire Serial Interface SPI QSPI MICROWIRE and DSP Compatible Schmitt Trigger Input on SCLK A
32. owe UWE 4 WIN TYPE 5 10 10 50 TST 20 10 60 P 17717 laesa 36 4015 04 848822581 311 n S LEA DE SIE Du emm pre 8000 DRAWING NO UFM M 01 A G UFM B SERIES SEALING DIAG RAM SEALING POSITION APPROVED NO REV DRAWING NO UFM M 02 A 1 DWG UFM F LSERIES NAME SEALING DIAGRAM UFM F L SERIESSEALING DIAGRAM SEALING POSITION 40 UFM B SERIES EXPLOSION DIAGRAM APPROVED NO REV DRAWING NO UFM E 01 A DWG NAME UFM BSERIES EXPLOSION DIAGRAM PART PART DESCRIPTION REMARK T 1 0002850000 STAINLESS STEEL PLATTER 5 SERIES 460 335 17 2 1 F0100NBS000 ALUMINUM UPPER CABINET NBS FOUR HOLES 3 1 1 0045040 LOAD CELL 042 X Xkg 4 1 FO1OONB S000 ALUMINUM UNDER CABINET NBS FOUR HOLES 5 4 G0004NBS000 ADJUSTABLE FEET NBS 6 4 120014000625 SCREW M6 1P 25L HEX SOCKET T 3 20040001006 WASHER M6 OR 1 4 8 1 20014020616 SCREW M6 1P 16L HEX SOCKET 9 4 Z0013010830 SCREW M8 1 25P 30L HEX HEAD 10 4
33. rding to the display normally the second point is the 2 3 capacity Press MODE when display is flashing to complete the calibration procedure Note Auto calibration can only be performed when the span value Is within 10 tolerance of dealer calibration 14 NOTE CALIBRATION IN LB When calibrating the scale lb please refer to the following steps a Enable the metric imperial weighing unit conversion in F3 b Press MODE to change the weighing unit to lb when scale is on c Repeat the procedures in Auto Calibration 15 3 TROUBLE SHOOTING 3 1 TROUBLE SHOOTING LOOP NO DISPLAY Y POWER ON DISPLAY RANDOM FIGURE CPU LCD KEYBOARD CHECK POWER SUPPLY GHOST Y CHECK POWER SUPPLY LCD LCD DRIVER IC R37 38 CHECK CPU LCD LCD DRIVER IC SHOW UNTS AND 00000 ZERO Y CHECK LOAD CELL A D UNIT OFFSET VALUE EADOUT UNSTABLE Y OK CHECK PLATFORM STOPS LOAD CELL A D UNIT BAD SOLDERING CAN T REACH FULL CAPACITY INCORRECT v RE CALIBRATE THE SCALE Y OK CHECK PLATFORM STOPS LOAD CELL OFFSET VALUE v NORMAL OPERATION 16 PARTS AND COMPO
34. sal LCD driver for low multiplex rates 1 FEATURES Single chip LCD controller driver Selectable backplane drive configuration static or 2 3 4 backplane multiplexing Selectable display bias configuration static 15 or 14 Internal LCD bias generation with voltage follower buffers 40 segment drives up to twenty 8 segment numeric characters up to ten 15 segment alphanumeric characters or any graphics of up to 160 elements 40 x 4 bit RAM for display data storage Auto incremented display data loading across device subaddress boundaries Display memory bank switching in static and duplex drive modes Versatile blinking modes LCD and logic supplies may be separated Wide power supply range from 2 V for low threshold LCDs and up to 9 V for quest host LCDs and high threshold automobile twisted nematic LCDs Low power consumption Power saving mode for extremely low power consumption in battery operated and telephone applications I C bus interface TTL CMOS compatible Compatible with any 4 bit 8 or 16 bit microprocessors microcontrollers 3 ORDERING INFORMATION TYPE NUMBER Product specification PCF8576 May be cascaded for large LCD applications up to 2560 segments possible Cascadable with 24 segment LCD driver PCF8566 Optimized pinning for plane wiring in both single and multiple PCF8576 applications Space saving 56 lead plastic very small outline package VSO56
35. t is necessary to go through all tests and procedures to ensure the indicator meets all the meteorological and approval requirements Features of the UFM series 1 Designed to meet amp MEASUREMENT CANADA requirements 2 Zero Indicator 3 Indicator 4 Full Tare Function Subtractive 5 Negative Value Indicator 6 Auto Tare Function 7 Power on Zero Function 8 Manual Zero Function 9 Average Function 10 Auto Power Saving Function 11 Metric Avoirdupois ConversionFunction whereitislegalforuse 12 Large Size WIN LCD display 5 5 x 51mm 13 Low Battery Warning Signal 14 2 Point Calibration 15 Mini Jumper to Prevent End user Calibration 16 Optional EL Backlight 17 Optional Printer and RS232C Interface 18 Accumulation Function Available 19 Built in Rechargeable Battery Operated 20 Battery Operating time 200 Hours Plus with Full Charge 21 Gravity Compensation Software 2 SPECIFICATION 2 1 SYSTEM BLOCK DIAGRAM LCD LCD DRIVER INTERFACE UNIT with ROM POWER SUPPLY AC ADAPTOR 9V 500mA RECHARGEABLE BATTERY 6V 4Ah Description When a mass is placed on the platform transferred to the load cell inside KEYBOARD 6 KEYS the load of the article is The resistance to the excitation current in the strain gauge will then be changed
36. t7 1042 s 5VA RI EMI e 055306 471 R5 I 3 M4 7K u gt AINT 3 Ci 1042 1047 R7 10 5VA R9 7 DORING MEF RID 100R 10K MF R4 2 7 RH DSS306 471 3 M4K7 U2 5 4 l O am l R6 T 71 7 2 4 cs 1042 1042 45 4 4 gt C6 1042 5VA us 4 2950 DSS308 471 1 B 3 1 vo 1 T enn C16 T CON BP WF 1042 P 2 V gt 3 GND INTO INTO DRDY P17 5 P17 DATA t INT1 SCLK FM 12 5VA 5VA 5VA 95 07705 RESET pvpp H AIN2 1042 AN2 pop 8 gt R16 cs cio 10K pin L4 10uF 16V TC AM 2 4 m 1008 p7 AINI DRDY INTO 1 R15 5608 SCLK REF REF IN Z GUT x2 100P 100P 1 ATP 47 Title n Drowing No Revision 1 Size Sheet 1 of 1 Date 90 12 07 Drawn by 7 8 22 4 2 COMPONENT SIDE 1 D vi 9999 NS Bee ee oe 1 12 1 LAYER iG
37. ta output format of Prnt 1 or Prnt 2 When Prnt 1 is selected scale will print data in a table format with number of entries and total weight When Prnt 2 is selected scale will print single data when pressing M c Press TARE to save and return to other functions 12 2 4 10 Auto Tare Function Setting F9 Refer to the 2 4 1 on how to enter F9 b Press MODE to select Troff or Tr on Troff will disable the auto tare off function Tr_on will enable the auto tare function and tare off the first weight that is placed the scale c Press TARE to save and return to other functions 2 4 11 High Resolution Verification Mode F19 This function is intended to be usedonly by the manufacturer for initial verification purpose 2 4 12 Gravity Compensation Device C G F20 This function stores the gravity value of wherethe scaleis manufactured Scale was calibrated according to the value stored a Refer to the 2 4 1 on how to enter F20 b Use MODE to shift to next digit and use ON ZERO to increase the value c Press and hold MODE to save or TARE to quit When the change is saved scale will enter calibration automatically to reflect the change in gravity Please refer to 2 4 14 for how to calibrate the scale 2 4 13 Gravity Compensation Device U G F21 This function stores the gravity value of where the scale will be used The value stored in F 21 will be used to compare with the value in F 20
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