OHAUS Pioneer PJX Series, Service Manual

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TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com i Pioneer PJX Series Service Manual
Page No.
1 GETTING STARTED 1
1.1 INTRODUCTION 1
1.2 SERVICE FACILITIES 1
1.3 TOOLS AND TEST EQUIPMENT REQUIRED 2
1.4 SPECIFICATIONS 2
1.5 BALANCE OPERATION 7
1.5.1 Overview of the Controls 7
1.5.2 Principal Functions and Main Menu 8
1.5.3 Menu Navigation 9
1.5.4 Changing Settings 9
1.6 LEGAL FOR TRADE (LFT) 10
1.6.1 Settings 10
1.6.2 Verification 10
1.6.3 Sealing 10
2 DIAGNOSTIC GUIDE 11
2.1 TROUBLESHOOTING 11
2.2 DIAGNOSTIC GUIDE 11
3 MAINTENANCE / REPAIR PROCEDURES 13
3.1 PREVENTIVE MAINTENANCE 13
3.2 OPENING THE BALANCE 13
3.3 REPLACING THE LOAD CELL 16
3.4 REPLACING THE LOAD CELL PCB 18
3.5 REPLACING THE INCAL MECHANISM 19
3.6 REPLACING THE PRINTED CIRCUIT BOARD ASSEMBLIES (PCBA) 21
3.6.1 Main PCB 21
3.6.2 LFT PCB 22
3.7 Replacing the Function Label 23
3.8 Replacing Display Screen 24
4 TESTING 25
4.1 TEST MASSES REQUIRED 25
4.2 OPERATIONAL TEST 25
4.3 LOAD CELL TEST USING RAMP 25
4.4 PERFORMANCE TESTS 26
4.4.1 Precision Test 26
4.4.2 Repeatability Test (non-approved models) 26
4.4.3 Linearity Test 29
4.4.4 Off-Center Load Test 29
5 PARTS LISTS & DIAGRAMS 31
5.1 DRAFTSHIELD MODELS SPARE PARTS 32
5.2 NON-DRAFTSHIELD MODELS SPARE PARTS 34
APPENDIX A - USER CALIBRATIONS 36
A.1 CALIBRATION 36
A.2 SPAN CALIBRATION 37
A.3 LINEARITY CALIBRATION 38
APPENDIX B - SERVICE MENU 40
APPENDIX C – SERVICE TOOL 43
C.1 BALANCE COMMANDS 43
C.2 RS232 (DB9) PIN CONNECTIONS 45