Incorrect Readings After Turning SCXI Unit Off and Back On

[DieselPower]

I have a weird problem.  If I run my program to log two thermocouples it works fine.  Then I can turn the SCXI chassis off and back on and the numbers will be incorrect (twice what they should be).  If I then stop my program and open LabVIEW to log the same temperatures, everything is fine.  Is there some sort of reset I need to do or a reconfigure or something?  Keep in mind that before I turn off the unit I stop my VB.NET program and I turn the unit back on before I restart the program.  Using SCXI-1000 with an SCXI-1125.

Good Readings

Bad Readings

Code:

************************************************************************************************************************************

While Channels(ChannelCount).Device = "SC1Mod1"

With Channels(ChannelCount)

If Not mod1TaskCreated(0) Then

Tasks(0) =

New Task("mod1task")

mod1TaskCreated(0) =

True End If Select Case Channels(ChannelCount).Type Case Is = "Temperature"

Tasks(0).AIChannels.CreateThermocoupleChannel(.Device & "/" & .Channel, .Name, _

.Min, .Max, AIThermocoupleType.K, AITemperatureUnits.DegreesF)

Tasks(0).AIChannels(.Name).AutoZeroMode = AIAutoZeroMode.None

Tasks(0).AIChannels(.Name).LowpassEnable =

True

Tasks(0).AIChannels(.Name).LowpassCutoffFrequency = 4

Case Is = "Voltage"

Tasks(0).AIChannels.CreateVoltageChannel(.Device & "/" & .Channel, .Name, AITerminalConfiguration.Differential, _

.Min, .Max, AIVoltageUnits.Volts)

Tasks(0).AIChannels(.Name).AutoZeroMode = AIAutoZeroMode.None

Tasks(0).AIChannels(.Name).LowpassEnable =

True

Tasks(0).AIChannels(.Name).LowpassCutoffFrequency = 4

Case Else

MsgBox("Error in channel configuration!", MsgBoxStyle.Critical, "Warning!")

System.Console.WriteLine("Error in Channel Configuration. Abort.")

Exit Sub End Select End With

ChannelCount += 1

End While

Tasks(0).Timing.ConfigureSampleClock("", 10000, SampleClockActiveEdge.Rising, SampleQuantityMode.FiniteSamples, 1000)

Tasks(0).Control(TaskAction.Verify)

reader =

New AnalogMultiChannelReader(Tasks(0).Stream)

Task1Data = reader.ReadMultiSample(1000)

************************************************************************************************************************************

Thanks.

[DieselPower]

Problem solved:

Private dvc As DAQmx.Device

dvc = DaqSystem.Local.LoadDevice("SC1Mod1")

dvc.Reset()

[Tom_W_[DE]]

For discussion of why this situation arises please see this thread.

Thanks-

[DieselPower]

Thanks Tom.

[Tom_W_[DE]]

Not a problem- let us know if you run into anything else.

Thanks again!