OHAUS T71P, Service Manual

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CHAPTER 1
GETTING STARTED
7000 Series T71 Indicator 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 T71 Indicators. The contents of this manual are contained in five
chapters:
Chapter 1 Getting Started – Contains information regarding service facilities, tools and test
equipment, specifications, hardware setup or disassembly, operating the Indicator, scale setup
and calibration, and configuring the Indicator’s communication and Legal-for-Trade menus.
Chapter 2 Troubleshooting – Contains a diagnosis/diagnostics chart and error code table.
Chapter 3 Maintenance Procedures – Contains preventive maintenance procedures and
disassembly, repair and replacement procedures.
Chapter 4 Testing – Contains an operational test, segment display test, performance tests and
adjustments.
Chapter 5 Drawings and Parts
Lists
– Contains exploded views of T71 Indicators, identifying
all serviceable components.
Before servicing the indicator, you should be familiar with the Instruction Manual which is
packed with every indicator.
1.2 SERVICE FACILITIES
To service an indicator, the service area should meet the following requirements:
•
Must be protected from electrostatic discharge.
•
Should be temperature controlled and meet the indicator specifications for temperature
environmental requirements. See specifications for temperature range.
•
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, openwindows,
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.