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DISCOVERY BALANCE
OHAUS DISCOVERY BALANCE Service Manual
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OHAUS DISCOVERY BALANCE Service Manual
Table of content
Contents
Introduction
Special Tools and Test Equipment Required
Test Masses Required
Specifications
Diagnosis
Balance Will Not Turn On
Balance Does Not Respond to Front Panel Controls
Balance Cannot Calibrate Using External Weights
Balance Cannot Calibrate Internally
Error Codes
Housing Disassembly/Opening the Balance
Display Assembly Parts List
Removing screws to separate Display Housing from bottom of balance
Display Balance Load Cell Cover
Discovery Balance Printed Circuit Board (PCB)
Incal Weight Hardware Disassembly
The InCal Weight Cover sits beneath the Display Cable Shield Plate
Removing and Replacing Calibration Motor Assembly
Calibration Motor Assembly
Load Cell Removal
Lifting off the PCB and its Mounting Plate from the Load Cell
Load Cell with cover removed
Load Cell removed
Load Cell Disassembly
Screws on bottom Flexure Arm assembly
Service Toolset, Part No. 80030340
Thumb screws and Hanger on top of Load Cell
Load Cell with Load Flexure, 2 screws and 4 washers removed
Lifting Ratio Beam to insert Brass Rod
Removing screws from PCB. (Note stepped washer under rear screw)
Up/Down Stop Plate
Removing Thumb screws that hold Hanger in place
Load Cell Cleaning
Load Cell Assembly
Yoke aligned with frame side-to-side, and flush with frame on front
Hanger installed, with Brass Fixture and Brass Brackets
Magnet Cover has oblong hole that clears Ratio Beam's stop tab
Up/Down Stop Plate which rests on Magnet Cover
Installing the bottom Flexure Arm
Load Flexure, aluminum washers, steel washers and screws
Hanger with Thumb screws removed
Note stops on sides of bottom Load Cell Cover
Top Load Cell Cover rests flush against bottom cover
Load Cell Chassis with keyway at point of triangle
Replacing Load Cell Cover
Placing PCB Mounting Plate on Load Cell
Installing Weights and Weight Holders
Correct position of Display Cable under Display Cable Shield Plate
Securing PCB Cover
Models Segment Display Test
Adjusting Off Center Load
Repeatability Test
Linearity Test
RS232 Interface Test
COM1 Interface Pin Connections
RS232 Commands
Print Test
Parts List for Discovery Housing
Discovery Display Assembly
Discovery Internal Parts Outside Load Cell
Discovery Load Cell Parts
SERVICE MANUAL
DISCOVERY BALANCE
Ohaus Corporation 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ 07058-2033 (973) 377-9000
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This manual is suitable for:
DISCOVERY BALANCE
DV114C
DV214C
DV215CD
DV314C
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