OHAUS PA153 Manuals

Manuals and User Guides for OHAUS PA153. We have 1 OHAUS PA153 manual available for free PDF download: Service Manual

OHAUS PA153 Service Manual (116 pages)

Brand: OHAUS | Category: Scales | Size: 9 MB

Table of Contents
3
Chapter 1 Getting Started
11
Introduction
11
Service Facilities
11
Tools and Test Equipment Required
12
Special Tools
12
Standard Tools and Test Equipment
12
Specifications
12
Specifications: External Calibration Models (Includes M Models)
12
Specifications: Carat Models
13
Specifications: Gold Models (External Calibration)
14
Specifications: Gold Models (Internal Calibration)
14
Balance Operation
15
Overview of the Controls
15
Admissible Ambient Conditions
15
Overview of the Display Indicators
16
Functions of Display Controls
16
Display Indicators
16
Power on
17
Power off
17
Menu Setup
17
Menu Structure
17
The Load Cell
18
Connecting the RS232 Interface
19
COM 1 Interface Pin Connections
19
RS232 Commands
20
RS232 Command Table
20
Chapter 2 Troubleshooting
21
General Procedures for Troubleshooting
21
Diagnostic Guide
21
Diagnosis
21
Error Codes
24
Chapter 3 Maintenance Procedures
25
Preventive Maintenance
25
Preventive Maintenance Checklist
25
Opening the Balance
25
Variations in Opening Pioneer Models
26
Load Cell Removal and Disassembly
27
Variations in Pioneer Load Cells
27
Disassembly of Precision Balances with Internal Calibration
28
Removing Internal Calibration Weights
29
Servicing the Internal Calibration Mechanism
29
Reassembling the Internal Calibration Mechanism
30
Disassembly of Precision Balances with Incal Mechanism
30
Removing the Load Cell - Precision Balances
31
Proper Manner to Grasp Load Cell When Removing Weight Arm Assembly
31
Load Cell Disassembly - Precision Balances
32
Service Fixture, Screws and Washers for 150G to 310G Precision Balances
32
Precision Load Cell Top
33
Position Sensor Board
34
Hanger
35
Magnets Must be Clean
36
Position Sensor Board Removal/Replacement/Adjustment - Precision
37
Main Printed Circuit Board (PCB) Replacement - All Balances
38
Position Sensor Board
38
Load Cell Reassembly - Precision Balances
39
Service Fixture for 510G to 4100G Precision Load Cell, Attached to Hanger
39
Sideways Motion Stop Plate
40
Precision Load Cell Top
41
When Position Sensor Board Shows Normal Weight, Tighten Its Screws
42
Removing the Incal Mechanism from Incal Analytical Balances
43
Removing Internal Calibration Weights and Components
43
Bottom Housing with Load Cell, Weight Arms and Weights Removed
44
Reinstalling Internal Calibration Components
45
Load Cell Removal/Installation - Analytical Balances
45
Disassembling Analytical Load Cells
46
Shims Are Inserted between the Hanger and the Load Cell
47
Vertical Flexure and Screws, Lock Plate, Washers, and Bushings, Removed
48
Hanger with Two Screws
49
Contact Board with 3-Wire Ribbon Cable Soldered to It
50
A Screw Connects the Contact Board to the Load Cell
51
Position Sensor PC Board Removal/Replacement/Adjustment - Analytical
52
Installing the Magnet Half
54
Insert Shims between the Hanger and the Load Cell on both Sides
55
Analytical Incal Load Cell with Top Bracket Visible
56
Reassembling Analytical Load Cells
57
When Position Sensor Board Shows Normal Weight, Tighten Its Screws
57
Block Style Load Cell
58
Block Style Load Cell Removal & Replacement
59
Progressive Disassembly of Block Style Load Cells
59
Internal Calibration Testing
60
Incal Motor Removal & Replacement
60
Incal Mechanism Removal
61
Incal Mechanism Installation
62
Removing Position Sensor
63
Removing the Block Style Load Cell from the Base Plate
64
Installing the Block Style Load Cell on the Base Plate
65
Removal and Installation of the Block Style Load Cell PC Board
66
Load Cell PCB-Temperature Sensor-Position Sensor Assembly
67
Removing the Ratio Beam on Block Style Load Cells
68
Contact Board with Cover Holder off
69
Weight Arm Screws and Washers Removed
70
Aluminum Sleeves Removed
71
Installing the Ratio Beam on Block Style Load Cells
72
Ratio Beam Vane Slotted Area
73
Installing the Incal Weight Arm
74
Centering Pins in Ratio Beam
75
Installing the Load Cell PCB-Temperature Sensor-Position Sensor
76
Position Sensor on the Magnet
77
Setting the Up/Down Stop Screw on Block Style Load Cells
78
Chapter 4 Testing
79
Test Masses Required
79
Operational Test
79
Segment Display Test
79
Performance Tests
80
Precision Test
80
Tolerances - Precision Models
80
Tolerances - Analytical Models
80
Off-Center Load Test
81
Off-Center Load Adjustment for Precision Models
82
Off-Center Load Adjustment for Analytical Models
83
Off-Center Load Adjustment for Block Style Models
84
Repeatability Test
85
Repeatability Worksheet
86
Linearity Test
87
Load Cell Assembly
91
Analytical Balance: Housing & Internal Parts
99
Precision Load Cell
100
Analytical Load Cell
102
Block Style Incal Load Cell & Parts
104
Appendix A STANDARD CALIBRATION Calibration
107
Calibration Masses
107
Span Calibration
107
Linearity Calibration
108
Appendix B SERVICE CALIBRATION
109
Entering the Service Menu
109
Ramp
110

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OHAUS PA153 Service Manual (116 pages)

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