Using the NI-DMM .NET Class Library in IVI.NET Applications

VB.NET

'Create an IVI DMM session. 
Dim iviDmmSession As IIviDmm = Ivi.Driver.IviDriver.Create(Of IIviDmm)("DMM-4072", True, True)
Dim currentRange As Double = 0.2 
Dim currentResolutionDigits As Double = 6.5
iviDmmSession.Configure(Ivi.Dmm.MeasurementFunction.DCCurrent, currentRange, currentResolutionDigits)

'Take a reading. 
Dim reading As Double = iviDmmSession.Measurement.Read(Ivi.Driver.PrecisionTimeSpan.FromSeconds(2))

'Get an NIDmm session from the IVI DMM session and get a reading using the NIDmm session. 
Dim sampleDmmSession As NIDmm = TryCast(iviDmmSession.GetService(GetType(NIDmm)), NIDmm)
If sampleDmmSession IsNot Nothing Then 
    Dim waveformVoltageRange As Double = 10 
    Dim waveformPointsToRead As Integer = 100 
    Dim rate As Double = 100
    sampleDmmSession.ConfigureWaveformAcquisition(DmmMeasurementFunction.WaveformVoltage, waveformVoltageRange, rate, waveformPointsToRead)
    Dim readingArray As AnalogWaveform(Of Double) = sampleDmmSession.WaveformAcquisition.ReadWaveform(waveformPointsToRead, NationalInstruments.PrecisionTimeSpan.FromMilliseconds(10000))
Else 
    Dim voltageRange As Double = 10, voltageResolution As Double = 0.0001 
    Dim numberOfSamples As Integer = 100
    iviDmmSession.Configure(MeasurementFunction.DCVolts, voltageRange, voltageResolution)
    iviDmmSession.Trigger.MultiPoint.SampleCount = numberOfSamples
    iviDmmSession.Trigger.Source = "Immediate" 
    Dim readingArray As Double() = iviDmmSession.Measurement.ReadMultiPoint(Ivi.Driver.PrecisionTimeSpan.FromMilliseconds(20000))
End If
iviDmmSession.Close()

C# 

// Create an IVI DMM session.
IIviDmm iviDmmSession = Ivi.Driver.IviDriver.Create<IIviDmm>("DMM-4072", true, true);
double currentRange = 0.2;
double currentResolutionDigits = 6.5;
iviDmmSession.Configure(Ivi.Dmm.MeasurementFunction.DCCurrent, currentRange, currentResolutionDigits);

//Take a reading. 
double reading = iviDmmSession.Measurement.Read(Ivi.Driver.PrecisionTimeSpan.FromSeconds(2));

//Get an NIDmm session from the IVI DMM session and get a reading using the NIDmm session.
NIDmm sampleDmmSession = iviDmmSession.GetService(typeof(NIDmm)) as NIDmm;
if (sampleDmmSession != null)
{
    double waveformVoltageRange = 10;
    int waveformPointsToRead = 100;
    double rate = 100;
    sampleDmmSession.ConfigureWaveformAcquisition(DmmMeasurementFunction.WaveformVoltage, waveformVoltageRange, rate, waveformPointsToRead);
    AnalogWaveform<double> readingArray = sampleDmmSession.WaveformAcquisition.ReadWaveform(waveformPointsToRead, NationalInstruments.PrecisionTimeSpan.FromMilliseconds(10000));
}
else
{
    double voltageRange = 10, voltageResolution = 0.0001;
    int numberOfSamples = 100;
    iviDmmSession.Configure(MeasurementFunction.DCVolts, voltageRange, voltageResolution);
    iviDmmSession.Trigger.MultiPoint.SampleCount = numberOfSamples;
    iviDmmSession.Trigger.Source = "Immediate";
    double[] readingArray = iviDmmSession.Measurement.ReadMultiPoint(Ivi.Driver.PrecisionTimeSpan.FromMilliseconds(20000));
}
iviDmmSession.Close();
 

Note   Before obtaining an IIviDmm reference from an existing NIDmm that is configured for waveform acquisition, set the OperationMode to IviDmmMode.

VB.NET

Dim sampleDmmSession As New NIDmm("DMM-4072", True, True)
Dim range As Double = 100 
Dim resolution As Double = 6.5  
' Use the NIDmm session as an IVI DMM session.
sampleDmmSession.OperationMode = DmmOperationMode.IviDmmMode
Dim serviceProvider As IServiceProvider = TryCast(sampleDmmSession, IServiceProvider)
Dim iviDmmSession As IIviDmm = TryCast(serviceProvider.GetService(GetType(IIviDmm)), IIviDmm)
If iviDmmSession IsNot Nothing Then
    iviDmmSession.Configure(MeasurementFunction.DCVolts, range, resolution)
    Dim reading As Double = iviDmmSession.Measurement.Read(Ivi.Driver.PrecisionTimeSpan.FromSeconds(2))
End If
sampleDmmSession.Close()

C#

NIDmm sampleDmmSession = new NIDmm("DMM-4072", true, true);
double range = 100;
double resolution = 6.5;
// Use the NIDmm session as an IVI DMM session.
sampleDmmSession.OperationMode = DmmOperationMode.IviDmmMode;
IServiceProvider serviceProvider = sampleDmmSession as IServiceProvider;
IIviDmm iviDmmSession = serviceProvider.GetService(typeof(IIviDmm)) as IIviDmm;
if (iviDmmSession != null)
{
    iviDmmSession.Configure(MeasurementFunction.DCVolts, range, resolution);
    double reading = iviDmmSession.Measurement.Read(Ivi.Driver.PrecisionTimeSpan.FromSeconds(2));
}
sampleDmmSession.Close();