Campbell CR310 - Accuracy for Resistance Measurements

Table 18-1: StrainCalc() configuration codes
BrConfig code Configuration
5
Full-bridge strain gage. Half the bridge has two gages parallel to +ɛ
and -ɛ, and the other half to +νɛ and -νɛ
6
Full-bridge strain gage. Half the bridge has two gages parallel to +ɛ
and -νɛ , and the other half to -νɛ and +ɛ:
Where:
ν : 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 • V1 / Vx) when multiplier = 1 and offset = 0.
"zero": gage offset to establish an arbitrary zero.
18.3.4 Accuracy for resistance measurements
Consult the following technical papers for in-depth treatments of several topics addressing
voltage measurement quality:
l
Preventing and Attacking Measurement Noise Problems
l
Benefits of Input Reversal and Excitation Reversal for Voltage Measurements
l
Voltage Measurement Accuracy, Self- Calibration, and Ratiometric Measurements
NOTE:
Error discussed in this section and error-related specifications of the CR300 series do not
include error introduced by the sensor, or by the transmission of the sensor signal to the data
logger.
18. Measurements100