CreateVoltageRmsChannel

[parksma]

I am using the CreateVoltageRmsChannel method to measure a RMS voltage on a usb-6343 analog channel (differential 6/14).  When this code executes, I receive the following error:

     Error -200341

     "Selected physical channel does not support the measurement type required by the virtual channel you are creating"

Here is the line of code (VB .NET) that generates the error:

     myTask.AIChannels.CreateVoltageRmsChannel("Dev1/ai6", "ai6", AITerminalConfiguration.Differential, -10, 10, AIVoltageAcrmsUnits.Volts)

I have tried other channels, but I get the same results.  Is RMS voltage measurement not supported by this device?  Any ideas?

Thanks.

[Steven_K.]

Hi parksma,

The CreateVoltageRmsChannel method only works with NI ELVIS. To get an RMS measurement with your hardware, create a regular voltage task using CreateVoltageChannel, take the output from this task and run it through an RMS function.

Steven K.

[parksma]

Thank you for the response... that was what I was planning to do if I could not figure it out.