SCC-SG Series Strain-Gauge Modules User Guide
4
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Each of these three configurations is subdivided into multiple configuration
types. The orientation of the active elements and the kind of strain
measured determines the configuration type. NI supports seven
configuration types in software. However, with custom software scaling
you can use all Wheatstone bridge configuration types with any NI
hardware product that supports the gauge configuration type.
The supported strain gauge configuration types measure axial strain,
bending strain, or both. You can use similar configuration types to measure
torsional strain; however, NI software scaling does not support these
configuration types. It is possible to use NI products to measure torsional
strain, but to properly scale these configuration types you must create a
custom scale in Measurement & Automation Explorer (MAX) or perform
scaling in your software application.
This document discusses all of the mechanical, electrical, and scaling
considerations of each strain-gauge configuration type supported by NI.
Conventions
The following conventions are used in this guide:
<>
Angle brackets that contain numbers separated by an ellipsis represent a
range of values associated with a bit or signal name—for example,
DBIO<3..0>.
»
The
»
symbol leads you through nested menu items and dialog box options
to a final action. The sequence
File»Page Setup»Options
directs you to
pull down the
File
menu, select the
Page Setup
item, and select
Options
from the last dialog box.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash. When this symbol is marked on
the product, refer to the
Read Me First: Safety and Radio-Frequency
Interference
document, shipped with the product, for precautions to take.
Table 1.
Strain-Gauge Configurations
Configuration
Number of Active Elements
Quarter-bridge
1
Half-bridge
2
Full-bridge
4
