Chapter 5
Using the SCXI-1521/B
5-12
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0.001, // System.Double maxVal
AIStrainGageConfiguration.QuarterBridgeI, //
AIStrainGageConfiguration
strainGageConfiguration
AIExcitationSource.Internal, //
AIExcitationSource excitationSource
3.3, // System.Double excitationValue
2.0, // System.Double gageFactor
0.0, // System.Double initialBridgeVoltage
120.0, // System.Double normalGageResist
0.3, // System.Double poissonRatio
0.0, // System.Double leadWireResist
AIStrainUnits.Strain); // AIStrainUnits units
// setting attributes after the channel is created
AIChannel myChannel = myTask.AIChannels[“strain0”];
Notes
You can create and configure the strain task in MAX and load it into your
application with the function call
NationalInstruments.DAQmx.DaqSystem.Local.LoadTask
Refer to
NI Measurement Studio Help
for more information about creating NI-DAQmx
tasks in LabWindows/CVI and NI-DAQmx property information.
Other Application Documentation and Material
Refer to the ADE manual and the DAQ analog input examples that come
with your application software for more detailed information about
programming the SCXI modules for scanning in multiplexed mode.
Calibrating the Strain System
There are two types of calibration important to verifying the accuracy of a
strain measurement system. Device calibration ensures the accuracy of the
SCXI-1521/B. System calibration involves removing potential
error-causing variables such as offset and verifying the accuracy of the
strain element through shunt calibration.
