Conventions; Specifications; 2640A/2645A Combined Specifications - Fluke 2640A Service Manual

NetDAQ
Service Manual

Conventions

Throughout the manual set, certain notational conventions are used. A summary of these
conventions follows:
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Specifications

Specifications are divided into three sections. The first section contains the combined
specifications that apply equally to both the 2640A and 2645A instruments. The second
section contains specifications that apply only to the 2640A instrument. The third section
contains specifications that apply only to the 2645A instrument.

2640A/2645A Combined Specifications

The following specifications apply equally to both the 2640A and 2645A instruments.
The topics include:
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1-8
Instrument Reference The term "instrument" is used in this manual to refer to both
the 2640A NetDAQ and 2645A NetDAQ networked data acquisition units. The
model number (2640A or 2645A) is used when discussing characteristics unique to
one instrument.
Printed Circuit Assembly The term "pca" is used to represent a printed circuit
board and its attached parts.
Signal Logic Polarity On schematic Diagrams, a signal name followed by a "*"
character is active (or asserted) low. Signals not so marked are active high.
Circuit Nodes Individual pins or connections on a component are specified with a
dash (-) following the assembly and component reference designators. For example,
pin 19 of U30 on assembly A1 would be A1U30-19.
Front Panel Interface User Notation For front panel operation, XXX, an
uppercase word or symbol without parentheses indicates a button to be pressed by
the user. Buttons can be pressed in four ways:
1. Press a single button to select a function or operation.
2. Press a combination of buttons, one after the other.
3. Press and hold down a button; then press another button.
4. Press multiple buttons simultaneously.
Computer Interface User Notation For computer interface operation:
XXX An uppercase word without parentheses identifies a command by name.
<XXX> Angle brackets around all uppercase letters mean press the <XXX> key.
(xxx) A lowercase word in parentheses indicates a keyboard input.
2640A/2645A General Specifications
2640A/2645A Environmental Specifications
2640A/2645A Digital I/O and Totalizer Interface
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