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TABLE OF CONTENTS 

LIST OF ILLUSTRATIONS 

FIGURE NO. 

TITLE   

Page No. 

 

3-58 

Screws removed from Bottom Mounting Plate inserted into the Hanger.............3-23 

 

3-59 

Shims are inserted between the Hanger and the Load Cell................................3-23 

 

3-60 

Analytical balance Load Cell with Top Bracket visible ........................................3-23 

 

3-61 

Vertical Flexure and screws, Lock Plate, washers, and bushings, removed.......3-23 

 

3-62 

Top Flexure Arm (Analytical)...............................................................................3-23 

 

3-63 

Bottom Flexure Arm (Analytical)..........................................................................3-23 

 

3-64 

Hanger with two screws ......................................................................................3-25 

 

3-65 

Service Fixture attached to the front of Load Cell after removing Hanger ..........3-25 

 

3-66 

The Vane is secured by two screws near the rear of the Load Cell ....................3-25 

 

3-67 

The Vane removed..............................................................................................3-25 

 

3-68 

Two solder points on PSB, and two screw holes for removing the board ...........3-26 

 

3-69 

Contact Board with 3-wire ribbon cable soldered to it .........................................3-26 

 

3-70 

Four screws secure the Magnet Half to the Ratio Beam.....................................3-26 

 

3-71 

The Magnet Half, when removed, should be cleaned .........................................3-25 

 

3-72 

A screw connects the Contact Board to the Load Cell ........................................3-26 

 

3-73 

Use a smaller screw to temporarily fasten it to the Ratio Beam..........................3-26 

 

3-74 

The Sideways Motion Stop Plate and the black Up/Down Stop screw ...............3-27 

 

3-75 

Position Sensor Board (Analytical)......................................................................3-28 

 

3-76 

Adjust Position Sensor Board vertically until 

Err8.X

 does not appear.................3-28 

 

3-77 

The Ratio Beam needs to clear the groove in the Up/Down Stop Screw............3-29 

 

3-78 

Service Fixture is installed prior to installing Ratio Beam Flexures.....................3-29 

 

3-79 

Sideways Motion Stop Plate and Up/Down Stop Screw .....................................3-29 

 

3-80 

Elongated holes on Ratio Beam Flexures go on the bottom ...............................3-29 

 

3-81 

Installing the Magnet Half....................................................................................3-30 

 

3-82 

Four screws on Magnet Half ...............................................................................3-30 

 

3-83 

Position Sensor Board.........................................................................................3-30 

 

3-84 

3-wire cable soldered to Contact Board ..............................................................3-30 

 

3-85 

Installing the Vane...............................................................................................3-30 

 

3-86 

Screws removed from Bottom Mounting Plate inserted into the Hanger.............3-31 

 

3-87 

Insert shims between the Hanger and the Load Cell on both sides ....................3-31 

 

3-88 

Bottom Flexure Arm ............................................................................................3-31 

 

3-89 

Top Flexure Arm..................................................................................................3-31 

 3-90  Vertical 

Flexure ...................................................................................................3-31 

 

3-91 

Vertical Flexure and screws, Lock Plate, washers, and bushings, removed.......3-31 

 

3-92 

Analytical InCal Load Cell with Top Bracket visible.............................................3-32 

 

3-93 

Analytical balance Load Cell with Top Bracket visible ........................................3-32 

 

3-94 

Bottom Mounting Plate on Analytical Load Cell ..................................................3-32 

 

3-95 

Ribbon cable connects PSB to Main PCB...........................................................3-32 

 

3-96 

When Position Sensor Board shows normal weight, tighten its screws ..............3-33 

 

3-97 

Block Style Load Cell ..........................................................................................3-34 

 

3-98 

Service Toolset for Block Style Load Cells.  PN 476000-030 .............................3-35 

 3-99  InCal 

Motor..........................................................................................................3-36 

 

3-100 

InCal Motor Removal...........................................................................................3-36 

 3-101 Motor 

Coupler .....................................................................................................3-36 

 

3-102 

Motor Shaft in counter-clockwise position ...........................................................3-37 

 

3-103 

Mounting Screws holding InCal Mechanism .......................................................3-37 

 

3-104 

Removing the InCal Mechanism .........................................................................3-37 

 

3-105 

InCal Mechanism Alignment................................................................................3-38 

 

3-106 

Centering InCal Weight .......................................................................................3-38 

Ohaus Corporation  www.ohaus.com 

Pioneer™ Balances Service Manual 

Summary of Contents for Pioneer

Page 1: ... MANUAL Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 973 377 9000 Ohaus Pioneer service Manual Ohaus Pioneer service Manual Ohaus Pioneer service Manual Ohaus Pioneer service Manual ...

Page 2: ...3 3 2 Disassembly of Precision Balances with Internal Calibration 3 4 3 3 3 Removing Internal Calibration Weights 3 5 3 3 4 Servicing the Internal Calibration Mechanism 3 5 3 3 5 Reassembling the Internal Calibration Mechanism 3 6 3 3 6 Disassembly of Precision Balances with InCal Mechanism 3 6 3 3 7 Removing the Load Cell Precision Balances 3 7 3 3 8 Load Cell Disassembly Precision Balances 3 8 3...

Page 3: ...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 ...

Page 4: ...odels 4 2 4 4 Repeatability Worksheet 4 8 5 1 Precision Top Load Balance Housing Internal Parts 5 3 5 2 Round Pan Block Style InCal Balance Housing Internal Parts 5 5 5 3 Square Pan Block Style Square Pan Balance Housing Internal Parts 5 7 5 4 Precision Draft Shield Balance with Draft Shield Housing Parts 5 9 5 5 Analytical Balance Housing Internal Parts 5 11 5 6 Precision Balance Load Cell Parts ...

Page 5: ...t is lifted out 3 12 3 32 Magnets must be clean 3 12 3 33 Position Sensor Board 3 13 3 34 Adjust position of Sensor Board until Err8 X does not appear 3 13 3 35 Position Sensor Board 3 14 3 36 Installing Ratio Beam clearing the Up down Stop Screw 3 15 3 37 Precision Load Cell 150g to 310g top with Service Fixture attached 3 15 3 38 Service Fixture for 510g to 4100g Precision Load Cell attached to ...

Page 6: ...e Up Down Stop Screw 3 29 3 78 Service Fixture is installed prior to installing Ratio Beam Flexures 3 29 3 79 Sideways Motion Stop Plate and Up Down Stop Screw 3 29 3 80 Elongated holes on Ratio Beam Flexures go on the bottom 3 29 3 81 Installing the Magnet Half 3 30 3 82 Four screws on Magnet Half 3 30 3 83 Position Sensor Board 3 30 3 84 3 wire cable soldered to Contact Board 3 30 3 85 Installin...

Page 7: ... 46 3 130 Aluminum Sleeves removed 3 47 3 131 Up Down Stop Screw 3 47 3 132 Centering Pins removed 3 47 3 133 Removing the Ratio Beam 3 47 3 134 Ratio Beam Removed 3 47 3 135 Removing the Ratio Beam 3 47 3 136 Ratio Beam Removed 3 47 3 137 Removing the Aluminum Sleeves 3 47 3 138 Ratio Beam Weight Removal 3 48 3 139 Load Cell Critical Area 3 48 3 140 Magnet Area 3 48 3 141 Ratio Beam Vane Slotted ...

Page 8: ...nternal 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 P...

Page 9: ... full manual can be found at http the checkout tech com estore catalog We also offer free downloads a free keyboard layout designer cable diagrams free help and support http the checkout tech com the biggest supplier of cash register and scale manuals on the net ...

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