OHAUS DISCOVERY BALANCE, Руководство по обслуживанию

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CHAPTER 1 INTRODUCTION
1.1 INTRODUCTION
This service manual contains the information needed to perform routine maintenance and
service on the Discovery Balances. The contents of this manual are contained in five chapters,
three appendixes and are listed as follows:
Chapter 1 Introduction – A guide service facilities, tools, test equipment, calibration masses
and specifications.
Chapter 2 Diagnosis – A diagnostic guide for troubleshooting, and an error code table.
Chapter 3 Repair Procedures – Disassembly/assembly, repair and replacement procedures.
Chapter 4 Testing – An operational test, segment display tests and performance tests.
Chapter 5 Parts Lists and Diagrams – Exploded view drawings and parts lists for Discovery
Balances.
Appendix A Standard Calibration – Procedures for Automatic Internal Calibration, Span
Calibration, Calibration Testing, and Calibration Adjustment.
Appendix B Service Calibration – Procedures for Service Calibration.
Appendix C Discovery Service Tool Instructions – Used to update software, restore
EEPROM data, install a new Main Printed Circuit Board and install a new Load Cell.
Before servicing the balance, you should be familiar with the Instruction Manual (Part Number
80104130) which is packed with every balance. The procedures in this manual assume the
technician performing them has a working knowledge of standard hand tools and the repair of
precision instruments.
1.2 SERVICE FACILITIES
To service a balance, the service area should meet the following requirements:
•
Should be temperature controlled and meet the balance specifications for temperature
environmental requirements. See specifications for temperature ranges of the various
models.
•
Must be free of vibrations such as fork lift trucks close by, large motors, etc.
•
Must be free of air currents or drafts from air conditioning/heating ducts, opens windows,
people walking by, fans, etc.
•
Area must be clean and air must not contain excessive dust particles.
•
Work surface must be stable and level.
•
Work surface must not be exposed to direct sunlight or radiating heat sources.
•
Use an approved Electro-Static Device.
Discovery Balance Service Manual 1-1 Ohaus Corporation www.ohaus.com