OHAUS Ranger 7000 R71MHD3, Руководство по обслуживанию

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TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com i Ranger 7000
®
Service Manual
Page No.
1 GETTING STARTED 4
1.1 INTRODUCTION 4
1.2 SERVICE FACILITIES 4
1.3 TOOLS AND TEST EQUIPMENT REQUIRED 5
1.4 SPECIFICATIONS 5
1.5 OPERATION 8
1.5.1 Overview of the Controls 8
1.5.2 Principle Functions and Main Menu. 10
2 DIAGNOSTIC GUIDE 11
2.1 TROUBLESHOOTING 11
2.2 SOFTWARE 11
2.3 DIAGNOSTIC GUIDE 12
3 MAINTENANCE / REPAIR PROCEDURES 14
3.1 PREVENTIVE MAINTENANCE 14
3.2 OPENING THE SCALE 15
3.2.1 Preparation for Opening Ranger 7000
®
Models 15
3.3 OPENING THE TERMINAL MODULE 15
3.3.1 Detaching the Terminal from the base. 15
3.3.2 Detaching the base RS422 cable from the Terminal 16
3.3.3 Dismantling the Terminal housing 18
3.4 OPENING THE BASE MODULE 22
3.4.1 Opening R71 large housing model 22
3.4.2 Opening R71 small housing mode 25
3.5 Replacing MFR Load cell, R71 29
3.6 Replacing SG Load cell, R71 32
3.7 REPLACING THE PRINTED CIRCUIT BOARD ASSEMBLIES (PCBA) 34
3.7.1 Terminal 34
3.7.2 Remove the TFT PCB 36
3.7.3 Removing MFR Main PCBA 39
3.7.4 Removing MFR LFT PCBA 41
3.7.5 Replacing SG LFT PCBA 43
3.7.6 Replacing SG Main PCBA 45
4 TESTING 48
4.1 TEST MASSES REQUIRED 48
4.1.1 OPERATIONAL TEST 49
4.2 LOAD CELL TEST USING RAMP 49
4.3 PERFORMANCE TESTS 49
4.3.1 Precision Test 49
4.3.2 Repeatability Test (non-approved models) 50
4.3.3 Linearity Test 52
4.3.4 Off-Center Load Test 53
5 PARTS LISTS & DIAGRAMS 55
5.1 TERMINAL SPARE PARTS 56
5.2 BASE SPARE PARTS (R71MD3 and R71MD6) 58
5.3 BASE SPARE PARTS (R71MD15 and R71MD35) 60
5.4 BASE SPARE PARTS (R71MHD3 and R71MHD6) 62
5.5 BASE SPARE PARTS (R71MHD15 and R71MHD35) 64