OHAUS Defender D100HL, Service Manual

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TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION
Page No.
1.1 Introduction ................................................................................................................1-1
1.2
Service Facilities........................................................................................................1-1
1.3 Tools and Test Equipment Required .........................................................................1-2
1.4 Test Masses Required...............................................................................................1-2
1.5 Service Strategy ........................................................................................................1-2
1.6 Physical Description: Defender H-Q-W Bases ..........................................................1-2
1.7 Specifications.............................................................................................................1-3
1.8 How Load Cells Operate............................................................................................1-6
CHAPTER 2 TROUBLESHOOTING
2.1 Troubleshooting .........................................................................................................2-1
2.1.1 Checking Load Cells for Trouble ........................................................................2-1
CHAPTER 3 MAINTENANCE AND REPAIR PROCEDURES
3.1 Preventive Maintenance ............................................................................................3-1
3.1.1 Preventive Maintenance Checklist .....................................................................3-1
3.2 Replacing the Load Cell.............................................................................................3-1
3.3 Overload Stop Adjustments .......................................................................................3-2
CHAPTER 4 TESTING
4.1. Testing .......................................................................................................................4-1
4.2
Load Cell Resistance Checks....................................................................................4-1
4.3 Calibration with an External Indicator ........................................................................4-1
4.4. Consistency Check ....................................................................................................4-2
4.5 Performance Tests ....................................................................................................4-2
4.5.1 Off Center Load (Shift) Test ...............................................................................4-3
4.5.2 Adjusting Off Center Load ..................................................................................4-4
4.5.3 Full Load Test.....................................................................................................4-5
CHAPTER 5 DRAWINGS AND PARTS LISTS
5-1 Defender H-Q-W Bases.............................................................................................5-2
APPENDIX A: GLOSSARY
A-1 Glossary.................................................................................................................... A-1
LIST OF TABLES
1-1 Specifications for Defender Rectangular Bases (Regular)....................................1-3
1-2 Specifications for Defender Rectangular Bases (Large) .......................................1-3
1-3 Specifications for Defender Square Bases (Regular)............................................1-4
1-4 Specifications for Defender Square Bases (Large) ...............................................1-4
1-5 Specifications for Defender Square Washdown Bases (Regular).........................1-5
1-6 Specifications for Defender Square Washdown Bases (Large) ............................1-5
3-2. Overload Gap Settings For Defender H-Q-W Bases.............................................3-3
4-1 Load Cell Resistance Readings ............................................................................4-1
4-2 Load Cell Output Readings ...................................................................................4-3
5-1 Defender H-Q-W Bases: Housing & Internal Parts ...............................................5-3
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Ohaus Corporation www.ohaus.com i Defender™ H-Q-W Series Service Manual