SCC-SG Series Strain-Gauge Modules User Guide
28
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A full-bridge type II configuration has the following characteristics:
•
Four active strain-gauge elements. Two are mounted in the direction of
bending strain with one on one side of the strain specimen (top), the
other on the opposite side (bottom). The other two act as Poisson
gauges and are mounted transversely (perpendicular) to the principal
axis of strain with one on one side of the strain specimen (top), the
other on the opposite side (bottom).
•
Rejects axial strain.
•
Compensates for temperature.
•
Compensates for the aggregate effect on the principle strain
measurement due to the Poisson’s ratio of the specimen material.
•
Compensates for lead resistance.
•
Sensitivity at 1000
µε
is
∼
1.3 m
V
OUT
/
V
EX
input.
•
Used with the SCC-SG04/24.
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 23.
Full-Bridge Type III Measuring Axial and Rejecting Bending Strain
A full-bridge type III configuration has the following characteristics:
•
Four active strain-gauge elements. Two are mounted in the direction of
axial strain with one on one side of the strain specimen (top), the other
on the opposite side (bottom). The other two act as Poisson gauges and
are mounted transversely (perpendicular) to the principal axis of strain
with one on one side of the strain specimen (top), the other on the
opposite side (bottom).
•
Compensates for temperature.
•
Rejects bending strain.
R
2
(+ )
R
4
(+ )
R
1
(– )
R
3
(– )
R
2
R
3
R
4
R
1
Axial
Bending
