TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com
i
Valor
™ 1000W Series Service Manual
Page No.
CHAPTER 1 GETTING STARTED
1.1
Introduction ..............................................................................................................1-1
1.2
Service Facilities ......................................................................................................1-1
1.3
Tools and Test Equipment Required ........................................................................1-2
1.4
Model Numbers
– Valor 1000W ...............................................................................1-2
1.5
Specifications ...........................................................................................................1-2
1.6
Scale Operation .......................................................................................................1-3
1.6.1 Overview of the Controls ...................................................................................1-3
1.6.2 Power On ..........................................................................................................1-4
1.6.4 Power Off ..........................................................................................................1-4
1.7
How Load Cells Operate ..........................................................................................1-5
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 .......................................................................2-1
2.2.3 Diagnostic Guide...............................................................................................2-4
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
3.4
Removing/Replacing the Main PCB .........................................................................3-3
3.5
Removing/Replacing the Rear Display PCB .............................................................3-3
3.6
Removing/Replacing the Load Cell ..........................................................................3-4
3.7
Removing/Replacing the Battery ..............................................................................3-5
3.8
Replacing the Function Label ...................................................................................3-5
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
CHAPTER 5 PARTS LISTS & DRAWINGS
5-1 Parts lists & Drawings ..............................................................................................5-1
5-2
Valor 1000W (V11PW3) Scales: Parts .....................................................................5-2
5-3 Valor 1000W (V11PW6) Scales: Parts .....................................................................5-4
5-4 Valor 1000W (V11PW15) Scales: Parts ...................................................................5-6
5-5 Valor 1000W (V11PW30) Scales: Parts ...................................................................5-8
Summary of Contents for Valor 1000W
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