SCC-SG Series Strain-Gauge Modules User Guide
18
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Full-Bridge Type III
This section provides information for the full-bridge strain-gauge
configuration type III. The full-bridge type III only measures axial strain.
Figure 14 shows a general full-bridge type III circuit diagram.
Figure 14.
Full-Bridge Type III Circuit Diagram
The following symbols apply to the circuit diagram and equations:
•
R
1
is an active element measuring compressive Poisson effect (–
νε
).
•
R
2
is an active element measuring tensile strain (+
ε
).
•
R
3
is an active element measuring compressive Poisson effect (–
νε
).
•
R
4
is an active element measuring the tensile strain (+
ε
).
Figure 15 shows how to set up two full-bridge type III configurations with
the SCC-SG04/24.
+
–
–
+
V
EX
V
CH
R
4
(+ )
R
3
R
2
R
1
(– )
(+ )
(– )
