Specifications

Section 8. Processing and Math Instructions
8-33
Parameter
& Data Type
Enter
BrZero
Variable
The variable array that holds the unstrained reading(s) in millivolts out per
volt in. This value will be subtracted from subsequent strain readings so
that the strain output values will be relative to the zero condition.
BrConfig
Constant
Bridge configuration code for strain gages The bridge configuration code
can be entered as a positive or negative number:
+ code:
V
r
=
−
0 001.( )Source
Z
ero ; bridge configured so its output
decreases with increasing strain.
- code:
V
r
=
−
−
0 001.( )Source
Z
ero
; bridge configured so output
increases with strain. This is the configuration for a quarter bridge using
CSI’s 4WFB350 Terminal Input Module (i.e., enter the bridge
configuration code as -1 for 1/4 bridge with TIM.)
Code Configuration
1
Quarter bridge strain gauge
µε =
−⋅
+
410
12
6
V
GF V
r
r
()
2 Half bridge strain gauge, one gage parallel to strain, the other at
90° to strain:
µε
νν
=
−⋅
+− −
410
12 1
6
V
GF V
r
r
[( ) ( )]
3 Half bridge strain gauge, one gage parallel to
+ε
, the other
parallel to
−
ε
:
µε =
−⋅210
6
V
GF
r
4 Full bridge strain gage, 2 gages parallel to
+ε
, the other 2 parallel
to
−
ε
:
µε =
−10
6
V
GF
r
5 Full bridge strain gage, half the bridge has 2 gages parallel to
+
ε
and
−
ε
: the other half
+
ν
ε
and
−
ν
ε
:
µε
ν
=
−⋅
+
210
1
6
V
GF
r
()
6 Full bridge strain gage, one half
+
ε
and
−νε
, the other half
−
ν
ε
and
+
ε
.:
µε
νν
=
−⋅
+− −
210
11
6
V
GF V
r
r
[( ) ( )]
GageFactor
Variable
Gage Factor. The gage factor can be entered as a constant used for all
repetitions or a variable array can be loaded with individual gage factors
which are automatically used with each rep. To use an array enter the
parameter as arrayname(), with no element number in the parentheses.
PoissonFactor
Variable
Poisson ratio, enter 0 if it does not apply to configuration.