SCC-SG Series Strain-Gauge Modules User Guide
10
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Quarter-Bridge Type I
This section provides information for the quarter-bridge strain-gauge
configuration type I. The quarter-bridge type I measures either axial or
bending strain.
Figure 4 shows a general quarter-bridge type I circuit diagram.
Figure 4.
Quarter-Bridge Type I Circuit Diagram
The following symbols apply to the circuit diagram and equations:
•
R
1
and R
2
are half-bridge completion resistors.
•
R
3
is the socketed quarter-bridge completion resistor
(dummy resistor).
•
R
4
is the active element measuring tensile strain (+
ε
).
Figure 5 shows how to set up two quarter-bridge type I configurations with
the SCC-SG01/02.
+
–
–
+
V
EX
R
1
R
L
R
2
R
3
V
CH
R
L
R
L
R
4
(+ )
