Campbell CR3000 Micrologger, Руководство оператора

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Section 8. Operation
379
StrainCalc() Instruction Equations
StrainCalc()
BrConfig Code Configuration
1
Quarter-bridge strain gage
1
:
2
Half-bridge strain gage
1
. One gage parallel to strain, the
other at 90° to strain:
3
Half-bridge strain gage. One gage parallel to + , the other
parallel to -
1
:
4
Full-bridge strain gage. Two gages parallel to + , the
other two parallel to -
1
:
5
Full-bridge strain gage. Half the bridge has two gages
parallel to + and - , and the other half to +
and -
1
:
6
Full-bridge strain gage. Half the bridge has two gages
parallel to + and -
, and the other half to - and +
1
:
1
•
: Poisson's Ratio (0 if not applicable)
•
GF: Gage Factor
•
V
r
: 0.001 (Source-Zero) if BRConfig code is positive (+)
•
V
r
: –0.001 (Source-Zero) if BRConfig code is negative (–)
and where:
•
"source": the result of the full-
bridge measurement (X = 1000 • V
1
/ V
x
)
when multiplier = 1 and offset = 0.
•
"zero": gage offset to establish an arbitrary zero (see FieldCalStrain() in
FieldCal() Examples
(p. 232))
.