Table Of Contents - OHAUS Valor 2000 Service Manual

CHAPTER 1 GETTING STARTED
1.1 Introduction ..............................................................................................................1-1
1.2 Service Facilities ......................................................................................................1-1
1.3 Tools and Test Equipment Required ........................................................................1-1
1.4 Specifications ...........................................................................................................1-3
1.5 Scale Operation .......................................................................................................1-4
1.5.1 Overview of the Controls ...................................................................................1-4
1.5.2 Power On ..........................................................................................................1-5
1.5.3 Power Off ..........................................................................................................1-5
1.5.4 Menu Setup ......................................................................................................1-6
1.5.5 Menu Navigation ...............................................................................................1-6
1.6 Legal For Trade .......................................................................................................1-7
CHAPTER 2 TROUBLESHOOTING
2.1 Troubleshooting .......................................................................................................2-1
2.2 Diagnostic Guide ......................................................................................................2-1
2.2.1 Diagnosis ..........................................................................................................2-1
2.2.2 Checking Load Cells for Trouble .......................................................................2-2
2.2.3 Testing the Printed Circuit Board (PCB) ............................................................2-4
2.2.4 Diagnostic Guide...............................................................................................2-6
CHAPTER 3 MAINTENANCE PROCEDURES
3.1 Preventive Maintenance ...........................................................................................3-1
3.1.1 Preventive Maintenance Checklist ....................................................................3-1
3.2 Service Strategy .......................................................................................................3-1
3.3 Opening the Scale....................................................................................................3-1
3.2.1 Separating the Top and Bottom Housings .........................................................3-2
3.2.2 Removing the Component Covers and Lifting Out the Cable Plugs ..................3-3
3.4 Removing/Replacing the Main Printed Circuit Board (PCB) .....................................3-3
3.5 Replacing the Rear Display PCB ..............................................................................3-4
3.6 Removing/Replacing the Load Cell ..........................................................................3-4
3.7 Cable Set Replacement ...........................................................................................3-5
3.8 Replacing the Battery ...............................................................................................3-5
3.9 Replacing the Gaskets .............................................................................................3-5
3.10 Setting/Removing Legal-For-Trade ..........................................................................3-6
3.11 Replacing the Function Label ...................................................................................3-6
CHAPTER 4 TESTING
4.1. Testing .....................................................................................................................4-1
4.1.1 Test Masses Required ......................................................................................4-1
4.2 Operational Test ......................................................................................................4-1
4.3 Segment Display Test ..............................................................................................4-1
4.4. Performance Tests ...................................................................................................4-2
4.4.1 Precision Test ...................................................................................................4-2
4.4.2 Repeatability Test .............................................................................................4-3
4.4.3 Linearity Test ....................................................................................................4-5
4.4.4 Off-Center Load Test ........................................................................................4-5
4.4.5 Adjusting Off Center Load .................................................................................4-6
Ohaus Corporation www.ohaus.com

TABLE OF CONTENTS

i Valor™ 2000 Series Service Manual
Page No.