TABLE OF CONTENTS
Ohaus Corporation www.ohaus.com
i
Explorer
®
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
UNIT CAPACITY AND READABILITY
5
1.6
BALANCE OPERATION
8
1.6.1
Overview of the Controls
8
1.6.2
Main Menu and Principal Functions
9
1.6.3
Menu Navigation
9
1.6.4
Changing Settings
10
1.6.5
Functions and Icons
10
1.7
LEGAL FOR TRADE (LFT)
12
1.8
MENU STRUCTURE
13
1.8.1
User Menu
13
1.8.2
Diagnostics Menu
13
1.9
Securing the Menu and Key Lock menu settings
14
1.10
Display Touch Areas
14
2
DIAGNOSTIC GUIDE
16
2.1
TROUBLESHOOTING
16
2.2
SOFTWARE
16
2.3
DIAGNOSTIC GUIDE
16
3
MAINTENANCE / REPAIR PROCEDURES
20
3.1
PREVENTIVE MAINTENANCE
20
3.2
OPENING THE BALANCE
20
3.2.1
Preparation for Opening Explorer
®
Models
20
3.2.2
Opening the Terminal Module
22
3.2.3
Opening the Base Module with a Draftshield
24
3.2.4
Opening the Base Module (Top Loader)
26
3.2.5 Opening the Base Module (EX12001, EX24001, EX35001)
28
1. Prepare the balance as instructed above.
28
2. Remove the 2 screws that hold the Spider to the Top Housing and lift off the Spider. 28
3. Remove the 7 screws that hold the Top Housing to the Base.
28
4. Remove the Top Housing
29
3.3 REPLACING THE LOAD CELL (not 12001, 24001 and 35001)
29
3.4 REPLACING THE LOAD CELL (12001, 24001 and 35001)
35
3.5 REMOVING LOAD CELL PROTECTION SCREWS
36
3.6 REPLACING THE PRINTED CIRCUIT BOARD ASSEMBLIES (PCBA)
37
3.2.5
Terminal
37
3.2.6
Base
39
3.7 Replacing the Function Label
42
3.8 Replacing the Touch Panel
43
3.9 Replacing the Feet
43
4
TESTING
45
4.1
TEST MASSES REQUIRED
45
4.2
OPERATIONAL TEST
46
4.3
LOAD CELL TEST USING RAMP
46
4.4
PERFORMANCE TESTS
46
