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Intelligent Weighing Technology AM-3000 Maintenance Manual

Am weighing scale series
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MODELS: AM-3000, AM-6000, AM-15K, AM-30K
CONTENTS
Specifications and Function Subject to Change without Notice
MAINTENANCE MANUAL
AM WEIGHING SCALE SERIES
DECEMBER 1999 REV 1
1

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Summary of Contents for Intelligent Weighing Technology AM-3000

  • Page 1: Table Of Contents

    MAINTENANCE MANUAL AM WEIGHING SCALE SERIES MODELS: AM-3000, AM-6000, AM-15K, AM-30K CONTENTS 1. INTRODUCTION 2. SPECIFICATIONS 2.1 SYSTEM BLOCK DIAGRAM 2.2 PHYSICAL LAYOUT OF ELECTRICAL CONNECTION 2.3 GENERAL SPECIFICATIONS 3. INITIAL SETUP 3.1 INTERNAL FUNCTION AND SETTING METHODS 3.2 AUTO AND DEALER CALIBRATION PROCEDURES 3.3 DISABLE CALIBRATION WITH DIP SW.(S1)

  • Page 2: Introduction

    1. INTRODUCTION AM SERIES - ELECTRONIC WEIGHING SCALE FEATURES: * Full Tare * Tare Indicator * Zero Indicator * Negative Value Indicator * 2 Types of Calibration * Dip Switch to prevent end -user calibration * Sealable * Bubble Level * Adjustable Feet * 5 1/2 x 25mm Wide Angle LCD Display * Long Battery Operating Time...

  • Page 3: Specifications

    2. SPECIFICATION 2.1 SYSTEM BLOCK DIAGRAM DESCRIPTION: When a load is applied to the loa d cell. The resistance to the excitation current in the strain gauge changes and the analog output signal varies. It is amplified and digitalized continuously by the A/D converter into a digital signal.

  • Page 5: General Specifications

    2.3 GENERAL SPECIFICATION 2.3.1 Overall View 2.3.2 Dimension * Platter size: 245 x 300mm * Overall size: 336 x 285 x 118mm 2.3.3 Model specification Model name: AM series Display resolution: 1/3000( 3kg,6K,15kg,30kg) Internal resolution: 1/30000 Display: Single -sided,Double-sided if request Weight display -->...
  • Page 6 : +/ -10% R.O. * L/C APPLIED VOLTAGE : D C 3.3V * SPEED OF A/D CONVERSION : 10 times/sec * INTERNAL RESOLUTION : 30000 2.3.7 Model VS. Capacity & division MODEL NO. CAPACITY EXTERNAL DIVISION 1/3000 AM-3000 AM-6000 AM-15K 15kg AM-30K 30kg...

  • Page 7: Initial Setup

    3. INITIAL SETUP 3.1 INTERNAL FUNCTIONS AND SETTING METHODS INTERNAL FUNCTION TABLE Function Symbol Description Span value reading and dealer calibration Full display segment and max. capacity check Check offset value and scale configuration Auto power off setting HOW TO ENTER THE REQUIRED FUNCTION MODE a.

  • Page 8: Auto And Dealer Calibration Procedures

    4._OFF = Scale will automaticall y be turned off after 4 minutes unused. 3.2 AUTO AND DEALER CALIBRATION PROCEDURES ACCEPTABLE LOAD FOR AUTO AND DEALER CALIBRATION Model External Acceptable Auto and Dealer Number Division Calibration Load AM-3000 1/3000 AM-6000 1/3000 AM-15K 1/3000 10kg AM-30K 1/3000 10kg...

  • Page 9: Disable Calibration With Dip Sw.(S1)

    3.4 OFFSET AND SPAN VALUE DATA OFFSET AND SPAN VALUE DATA TABLE Model Offset Span Value(Thousand) at Offset Span Control(Ohm) Number Value Various Load Applied Control (Thousand) AM-3000 10~14 10~15 at 20~30 at VR1 Trimmer AM-6000 10~14 10~15 at 20~30 at VR1 Trimmer 23.2K AM-15K...
  • Page 10 HOW TO ADJUST SPAN VALUE The span value is controlled by resistor located on R1A, standard resistor value of R1A 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 R1A.

  • Page 11: Flow Chart

    3.5 FLOW CHART 3.5.1 Auto Calibration(for end-user)
  • Page 12 3.5.2 Function Test(for technicians only)

  • Page 15: Trouble Shooting

    4. TROUBLE SHOOTING 4.1 TROUBLE SHOOTING LOOP...

  • Page 16: Parts And Components Trouble Shooting

    4.2 PARTS AND COMPONENTS TROUBLE SHOOTING 4.2.1 Power Supply Checking 4.2.1.1 Relevant parts: Main Board(OM -10-X) U11(C1061) ZD1(8.2V) BR1(W04/1A) Q1(A1515) Q2(C945) Q4(C945) R36(1.2 ohm,1/2W) U9(HT -7039) U8( AIC 1722-3.3) ZD2(5.1V) Description: 1) AC Adaptor: This AC Adaptor provides power for DC9~12V,500mA(for CE Version) 2) Battery: Built -in Rechargeable Battery 6V/4Ah 3) How Battery is charged completely?
  • Page 17 4) +3.3V power drives analog and digital circuit system. U8(AIC 1722 -3.3) is a 3.3volts Voltage Regulator. 5) Auto -off: If the scale is set on 4_o FF or even under LO -BAT situation, after some minutes the CPU will release a low potential signal to draw - down Q2, then Q1 cuts off, the scale will be shut down immediately.
  • Page 18 4.2.4 CPU Checking 4.2.4.1 Check that all pins are seated properly into the socket. 4.2.4.2 Check that the Crystal Oscillator works. 4.2.4.3 Check the RESET is normally low. 4.2.5 A/D Unit Checking 4.2.5.1 Check that the +3.3V & +5V powers are correctly fed to the A/D unit.

  • Page 19: Electrical Circuitry

    5. ELECTRICAL CIRCUITRY 5.1 SCHEMATICS...

  • Page 24: Pcb Layout

    5.2 PCB LAYOUT...

  • Page 27: Bill Of Material

    6. BILL OF MATERIAL STRUCTURE Parts No. Description Specification Qty Remark E1OM0000010 P.C.B. KIT OM - 10-X MAINBOARD E1OM0001000 P.C.B. KIT OM - 41-X REAR BOARD OPTION E1FM1000000 P.C.B. KIT FM - 50-X A/D BOARD A0002****** LOAD CELL C2G1 -F CAPACITY = 6KG AM -3000 C2G1 -F...
  • Page 28 A0701227017 CAPACITOR (EC) 220uF/16V (SS TYPE) A0701106017 CAPACITOR (EC) 10uF/16V (SS TYPE) C14,C18, C21~24,C26, C29,C31,C39, A0730104050 CAPACITOR (MLC) 104Z C17,19,27, 30,32,38 A0740020050 CERAMIC CAPACITOR (CC) 20pF C15~16 A0804042322 METAL FILM RESISTOR 23.2K OHM 1/4W A0805041103 CARBON FILM RESISTOR 10K OHM 1/4W R13,R18~20, R26,R29, R30~31...
  • Page 29 A0804046801 METAL FILM RESISTOR 6.8K ohm,1/4W A0804042002 METAL FILM RESISTOR 20K ohm,1/4W A0801001203 TRIMMER 3006P - 001-203(20K) 1 A0901010060 CONNECTOR 6 PIN WAFER A1005030512 FERRITE BEAD 3.5 x 6 x 0.8 mm 10 L1~10 A1202060251 WIRE ARRAY 6 PIN 25cm OM-10-X MAINBOARD (EL OPTION) EL OPTION: A1401005120...

  • Page 30: Appendix

    7. APPENDIX PARTS EXPLOSION:...
  • Page 31 ITEM PART NAME DESCRIPTION STAINLESS STEEL PLATE NO.33 OEC SERIES PLASTIC PLATTER OEP SERIES PLASTIC UPPER CABINET OM SERIES(EMI COATING) OVERLAY PC AM SERIES REAR PANEL PC OEC SERIES BUBBLE LEVEL P.C.B. OM-10-X DC JACK FIXING PLATE OEP SERIES DC JACK SCD-022(BLACK) PLASTIC UNDER CABINET OEP SERIES(GRAY)
  • Page 40 C2G1-F LOAD CELL SPECIFICATION SHEET RATED CAPACITY 3,6,10,15,20,35kgf SAFE OVERLOAD 150%R.C. ULTIMATE OVERLOAD 200%R.C. 2mV/V ¡0.2mV/V RATED OUTPUT NON-LINEARITY 0.015%R.O. HYSTERESIS 0.015%R.O. REPEATABILITY 0.02%R.O. CREEP 0.02%R.O./20min. CREEP RECOVERY 0.02%R.O./20min. EXCITATION, RECOMMENDED EXCITATION, MAXIMUM ¡5%R.O. ZERO BALANCE TERMINAL RESISTANCE, INPUT 400£ (+20£ -20£ ) TERMINAL RESISTANCE, OUTPUT 350¡5£...

This manual is also suitable for:

Am-6000Am-15kAm-30k

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