CHAPTER 1 GETTING STARTED
Valor
™ 2000/4000 Series Service Manual
1-1
Ohaus Corporation www.ohaus.com
1.1 INTRODUCTION
This service manual contains the information needed to perform routine maintenance and
service on the Ohaus Valor 2000/4000 Series scales.
Familiarity with the scale’s Instruction
Manual is assumed. The contents of this manual are contained in five chapters:
Chapter 1 Getting Started
– Contains information on service facilities, tools and test
equipment, specifications, and the mechanical and electronic functions of the scale.
Chapter 2 Troubleshooting
– Contains a diagnostic guide and error code table.
Chapter 3 Maintenance Procedures
– Contains preventive maintenance procedures and
disassembly, repair and replacement procedures.
Chapter 4 Testing
– Contains a list of required test masses, an operational test, segment
display test, performance tests and adjustments.
Chapter 5 Drawings and Parts
Lists
– Contains exploded views of Valor 2000/4000
scales identifying all serviceable components.
Appendix A Standard Calibration
– Explains procedures for Standard Calibration,
performed prior to using a scale, and after service.
Appendix B Service Calibration
– Describes the Service Menu and sub-menus, which
allow authorized service personnel to perform factory Linearity and Span calibrations (no
pre-set limits), take Ramp readings, and to set the service menu units.
1.2 SERVICE FACILITIES
To service a scale, the service area should meet the following requirements:
Should be temperature controlled and meet scale specifications for temperature
environmental requirements.
Must be free of vibrations such as fork lift trucks close by, large motors, air currents
or drafts from air conditioning/heating ducts, open windows, people walking by, fans,
etc.
Area must be clean and free of excessive dust.
Work surface must be stable and level.
Scale must not be exposed to direct sunlight or radiating heat sources.
Use an approved Electro-Static Device.
1.3 TOOLS AND TEST EQUIPMENT REQUIRED
The service shop should contain the following equipment:
1. Standard hand tools.
2. Digital Voltmeter (DVM).
3. Standard Electronics tool kit.
4. Grounding mat and clip.
5. Strain Gauge Simulator.
Summary of Contents for VALOR 4000
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