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
Summary of Contents for Ranger 7000 R71MHD3
Page 1: ...Ranger 7000 Scale Service Manual...
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Page 5: ...TABLE OF CONTENTS Ohaus Corporation www ohaus com iii Ranger 7000 Service Manual...
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Page 58: ...Ohaus Corporation www ohaus com 56 Ranger 7000 Series Service Manual 5 1TERMINAL SPARE PARTS...
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