OHAUS DISCOVERY BALANCE Service Manual Manual pdf 82 page image
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OHAUS DISCOVERY BALANCE Service Manual

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Contents
  1. Introduction
  2. Special Tools and Test Equipment Required
  3. Test Masses Required
  4. Specifications
  5. Diagnosis
  6. Balance Will Not Turn On
  7. Balance Does Not Respond to Front Panel Controls
  8. Balance Cannot Calibrate Using External Weights
  9. Balance Cannot Calibrate Internally
  10. Error Codes
  11. Housing Disassembly/Opening the Balance
  12. Display Assembly Parts List
  13. Removing screws to separate Display Housing from bottom of balance
  14. Display Balance Load Cell Cover
  15. Discovery Balance Printed Circuit Board (PCB)
  16. Incal Weight Hardware Disassembly
  17. The InCal Weight Cover sits beneath the Display Cable Shield Plate
  18. Removing and Replacing Calibration Motor Assembly
  19. Calibration Motor Assembly
  20. Load Cell Removal
  22. Lifting off the PCB and its Mounting Plate from the Load Cell
  23. Load Cell with cover removed
  24. Load Cell removed
  25. Load Cell Disassembly
  26. Screws on bottom Flexure Arm assembly
  27. Service Toolset, Part No. 80030340
  28. Thumb screws and Hanger on top of Load Cell
  29. Load Cell with Load Flexure, 2 screws and 4 washers removed
  30. Lifting Ratio Beam to insert Brass Rod
  31. Removing screws from PCB. (Note stepped washer under rear screw)
  32. Up/Down Stop Plate
  33. Removing Thumb screws that hold Hanger in place
  34. Load Cell Cleaning
  35. Load Cell Assembly
  36. Yoke aligned with frame side-to-side, and flush with frame on front
  37. Hanger installed, with Brass Fixture and Brass Brackets
  38. Magnet Cover has oblong hole that clears Ratio Beam's stop tab
  39. Up/Down Stop Plate which rests on Magnet Cover
  40. Installing the bottom Flexure Arm
  41. Load Flexure, aluminum washers, steel washers and screws
  42. Hanger with Thumb screws removed
  43. Note stops on sides of bottom Load Cell Cover
  44. Top Load Cell Cover rests flush against bottom cover
  45. Load Cell Chassis with keyway at point of triangle
  46. Replacing Load Cell Cover
  47. Placing PCB Mounting Plate on Load Cell
  48. Installing Weights and Weight Holders
  49. Correct position of Display Cable under Display Cable Shield Plate
  50. Securing PCB Cover
  51. Models Segment Display Test
  52. Adjusting Off Center Load
  53. Repeatability Test
  54. Linearity Test
  55. RS232 Interface Test
  56. COM1 Interface Pin Connections
  57. RS232 Commands
  58. Print Test
  59. Parts List for Discovery Housing
  60. Discovery Display Assembly
  61. Discovery Internal Parts Outside Load Cell
  62. Discovery Load Cell Parts
OHAUS DISCOVERY BALANCE Service Manual Manual pdf 82 page image
CHAPTER 5 PARTS LISTS & DIAGRAMS5.3 DISCOVERY INTERNAL PARTS OUTSIDE LOAD CELLTABLE 5-3. LIST OF INTERNAL PARTS OUTSIDE LOAD CELLDrawing Item Description1 Main Printed Circuit Board (PCB) Cover2 Printed Circuit Board (PCB) Mounting Plate3 Main Printed Circuit Board (PCB) w/ EEROM Battery4 Blank EEROM5 Complete Load Cell6 Leveling Foot7 Calibration Motor Assembly8 Calibration Weight Arm9 Calibration Weight Holder10 InCal Weights Cover11 Weight Cover Bushing12 Display Cable Shield Plate13 Calibration Weight14 Bubble Level15 CR2032 Lithium BatteryFigure 5-3. Internal Parts Outside Load Cell.Discovery Balance Service Manual 5 -3 Ohaus Corporation www.ohaus.com
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This manual is suitable for:
DISCOVERY BALANCEDV114CDV214CDV215CDDV314C
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