Ohaus Corporation www.ohaus.com
2
Defender
™ Series Bases Service Manual
CHAPTER 1 INTRODUCTION
1.1
Introduction
This service manual contains the information needed for diagnosis and repair of Ohaus Defender series Bases.
The contents of this manual are contained in five chapters:
Chapter 1 Introduction
– Contains information regarding service facilities, tools and test equipment, test
masses, specifications, service strategy, and the mechanical and electronic operation of the Base.
Chapter 2 Troubleshooting
– Provides guidelines for evaluating the condition and performance of a Base
unit, and a standard troubleshooting methodology to follow, as well as a diagnostic guide.
Chapter 3 Maintenance Procedures
– Contains preventive maintenance procedures and disassembly, repair
and replacement procedures.
Chapter 4 Testing
– Contains guides for operational and performance tests and adjustments.
Chapter 5 Parts Identification
– Contains exploded views of Defender series Bases and parts, identifying all
serviceable components with parts lists.
Before servicing the Base, you should be familiar with the Instruction Manual which is packed with every base.
1.2
Definition of Signal Warning and Symbols
Safety notes are marked with signal words and warning symbols. These show safety issues and warnings.
Ignoring the safety notes may lead to personal injury, damage to the instrument, malfunctions and false results.
Signal Words
WARNING
For a hazardous situation with medium risk, possibly resulting in injuries or death if not
avoided.
CAUTION
For a hazardous situation with low risk, resulting in damage to the device or the property or in
loss of data, or injuries if not avoided.
Attention
For important information about the product.
Note
For useful information about the product.
Warning Symbols
General Hazard
Electrostatic discharge sensitive
Electric Shock Hazard
