Fluke NetDAQ 2640A, Service Manual

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Introduction and Specification
Operating Instructions
1
1-7
Operating Instructions 1-6.
Full operating instructions are provided in the NetDAQ User Manual (PN 942623). Refer
to the User Manual as necessary during the maintenance and repair procedures presented
in this Service Manual.
Organization of the Service Manual 1-7.
This manual focuses on performance tests, calibration procedures, and component-level
repair of the 2640A and 2645A networked data acquisition units. To that end, manual
chapters are often interdependent; effective troubleshooting may require not only
reference to the troubleshooting procedures in Chapter 5, but also some understanding of
the detailed Theory of Operation in Chapter 2 and some tracing of circuit operation in
the Schematic Diagrams presented in Chapter 7.
Often, scanning the table of contents yields an appropriate place to start using the
manual. A comprehensive table of contents is presented at the front of the manual; local
tables of contents are also presented at the beginning of each chapter for ease of
reference. If you know the topic name, the index at the end of the manual is probably a
good place to start.
The following descriptions introduce the manual:
Chapter 1 - Introduction and Specifications Introduces the instrument, describing its
features, options, and accessories. This chapter also discusses use of the Service Manual
and the various conventions used in describing the circuitry. Finally, a complete set of
specifications is presented.
Chapter 2 - Theory of Operation This chapter first categorizes the instrument’s
circuitry into functional blocks, with a description of each block’s role in overall
operation. A detailed circuit description is then given for each block. These descriptions
explore operation to the component level and fully support troubleshooting procedures
defined in Chapter 5.
Chapter 3 - General Maintenance Provides maintenance information covering
handling, cleaning, and fuse replacement. Access and reassembly procedures are also
explained in this chapter.
Chapter 4 - Performance Testing and Calibration This chapter provides performance
verification procedures, which relate to the specifications presented in Chapter 1. To
maintain these specifications, a full calibration procedure is also presented.
Chapter 5 - Diagnostic Testing and Troubleshooting The troubleshooting procedures
presented in this chapter rely closely on both the Theory of Operation presented in
Chapter 2, the Schematic Diagrams shown in Chapter 7, and the access information
provided in Chapter 3.
Chapter 6 - List of Replaceable Parts Includes parts lists for all standard assemblies.
Information on how and where to order parts is also provided.
Chapter 7 - Schematic Diagrams Includes schematic Diagrams for all standard and
optional assemblies. A list of mnemonic definitions is also included to aid in identifying
signal name abbreviations.