Converting Units in LabView and specifying sampling rate with Universal Library functions

[JennaU]

Hi,

I am having trouble converting units in LabView 7.0 and having it write to a file / output on a chart in Nm instead of in volts.  I can't seem to find any straightforward instructions, eventhough it seems like a simple task. 

Another task that would seem rather simple is changing the sampling rate with the XAIn program from the Universal Library for LabView (this is version 5.40).

If anyone could help me out, I would greatly appreciate it - I have tried other sources without much luck!

Thanks

Jenna

[Dennis_Knutson]

Are you really needing to change units or do you need to scale the voltages read from your sensors? If it's scaling, it would be trivial to set this up in mAX or with the DAQ Assistant if you were using an NI board. Since you are not, then you could use the Scaling and Mapping Express VI. The y axis of a chart is just a label. You can use the text tool to change it to anything you want.

I have no idea how to change sample rate for your board. Have you asked the vendor?

[JennaU]

Thanks for your help Dennis.  Scaling the voltage is just what I needed to do since, like you said, the amplitude axis can be changed (I just wasn't aware of the scaling and mapping express VI).

I haven't had much luck with the vendors in terms of their customer service, but I will continue to try.  In the meantime... if anyone knows how to adjust the sampling rate for an MCC board I would really appreciate the help.