TABLE OF CONTENTS
Pioneer
™ Balances Service Manual
ii
Ohaus Corporation www.ohaus.com
Page No.
3.3.20 Block Style Load Cell Disassembly & Replacement with Load Cell Kit ............ 3-35
3.3.21 Progressive Disassembly of Block Style Load Cells ........................................ 3-35
3.3.22 Internal Calibration Testing ............................................................................. 3-36
3.3.23 InCal Motor Removal & Replacement ............................................................. 3-36
3.3.24 InCal Mechanism Removal ............................................................................. 3-37
3.3.25 InCal Mechanism Installation .......................................................................... 3-38
3.3.26 Position Sensor Assembly Removal/Installation on MFR Load Cell ................ 3-39
3.3.27 Removing the Block Style Load Cell from the Base Plate ............................... 3-40
3.3.28 Installing the Block Style Load Cell on the Base Plate .................................... 3-41
3.3.29 Removal and Installation of the Block Style Load Cell PC Board .................... 3-42
3.3.30 Removing the Ratio Beam on Block Style Load Cells ..................................... 3-43
3.3.31 Installing the Ratio Beam on Block Style Load Cells ....................................... 3-47
3.3.32 Installing the InCal Weight Arm ....................................................................... 3-49
3.3.33 Installing the Load Cell PCB-Temperature Sensor-Position Sensor ................ 3-51
3.2.34 Setting the Up/Down Stop Screw on Block Style Load Cells ........................... 3-53
CHAPTER 4 TESTING
4.1.
Testing .....................................................................................................................4-1
4.1.1 Test Masses Required ......................................................................................4-2
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 Off-Center Load Test ........................................................................................4-3
4.4.3 Off-Center Load Adjustment for Precision Models .............................................4-4
4.4.4 Off-Center Load Adjustment for Analytical Models ............................................4-5
4.4.5 Off-Center Load Adjustment for Block Style Models ..........................................4-6
4.4.6 Repeatability Test .............................................................................................4-7
4.4.7 Linearity Test ....................................................................................................4-9
CHAPTER 5 DRAWINGS AND PARTS LISTS
5-1 Precision Top Load Balance Housing & Internal Parts .............................................5-2
5-2
Round Pan Block Style InCal Balance: Housing & Internal Parts .............................5-4
5-3
Square Pan Block Style Square Pan Balance: Housing & Internal Parts ..................5-6
5.4
Precision Draft Shield Balance with Draft Shield: Housing & Parts ...........................5-8
5.5
Analytical Balance: Housing & Internal Parts.......................................................... 5-10
5.6
Precision Balance Load Cell & Parts ...................................................................... 5-12
5.7
Analytical Balance Load Cell & Parts ..................................................................... 5-14
5.8
Block Style InCal Load Cell & Parts ....................................................................... 5-26
Appendix A STANDARD CALIBRATION
A.1
Calibration ............................................................................................................... A-1
A.1.1 Calibration Masses .......................................................................................... A-1
A.2
Span Calibration ..................................................................................................... A-1
A.3
Linearity Calibration ................................................................................................ A-2
Appendix B SERVICE CALIBRATION
B.1
Entering the Service Menu ...................................................................................... B-1
B.2
Ramp ...................................................................................................................... B-1
B.3
Service Span Calibration ......................................................................................... B-2
B.4
Service 3 Point- Linearity Calibration ...................................................................... B-3
Summary of Contents for Pioneer PA64
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