Specifications

Section 4. Sensor Support
4-20
TABLE 4.3-1. Strain Equations
Code Configuration
1
Quarter bridge strain gage
)V21(GF
V104
r
r
6
+
⋅−
=με
2
Half bridge strain gage, one gage parallel to strain, the other at
90° to strain:
)]1(V2)1[(GF
V104
r
r
6
−ν−ν+
⋅−
=με
3
Half bridge strain gage, one gage parallel to
ε
+
, the other
parallel to
ε
−
:
GF
V102
r
6
⋅−
=με
4
Full bridge strain gage, 2 gages parallel to
ε
+
, the other 2
parallel to
ε
−
:
GF
V10
r
6
−
=με
5
Full bridge strain gage, half the bridge has 2 gages parallel to
ε
+
and
ε
−
: the other half
ν
ε
+
and
ν
ε
−
:
)1(GF
V102
r
6
+ν
⋅−
=με
6
Full bridge strain gage, one half
ε
+
and
ν
ε
−
, the other half
ν
ε
−
and
ε
+
.:
)]1(V)1[(GF
V102
r
r
6
−ν−+ν
⋅−
=με
where:
v = Poisson Ratio (0 if not applicable)
GF = Gage Factor
V
r
=
−
0001.( )Source
Z
ero
if BRConfig code is positive (+)
V
r
=−
−
0 001.( )Source
Z
ero
if BRConfig code is negative (-)
where:
“source” = the result of the full Wheatstone bridge measurement
(X = 1000 * V
1
/ V
x
) when multiplier = 1 and offset = 0.
“zero” = gage offset to establish an arbitrary zero (see FieldCalStrain).
StrainCalc Example - See FieldCalStrain() Example for Quarter bridge.