SCXI 1520 measurement in microstrain

[Dave Wright]

I am trying to acquire samples from several SCXI-1520 channels and save / display them as microstrain instead of strain (calibration factor of 1,000,000) while at the same time applying a different calibration factor to two other channels acquired using an SCXI-1141.  I basically want to know how to apply different calibration factors to several different channels using DaqMX.  I have been chasing my tail with this for several days and I think I have just about exhausted all of my options...any suggestions would be greatly appreciated.

[stilly32]

Hi Dave,

It sounds like what you're looking for is applying custom scaling to different channels. There are a couple of ways you can do this. The easiest would be to use the DAQ assistant and apply a different scale for each channel. You would just need to set up a custom scale for each type of scaling you want. You can set up the scales from here:

This would be quick and easy, but if you don't want to use the DAQ assistant, you can set this up in DAQmx directly. Probably the quickest way is to configure a task in Measurement and Automation Explorer (MAX) with the channels and scales (similar to the DAQ assistant setup). You can then drag that task over to LabVIEW, right click on it and select Generate Code>> Configuration and Example. This will generate the code for you, and give you a good example to work off of later. You could also just build the code yourself by setting up scales in MAX, and configuring your code like so:

Hope this helps,

Andrew S.

National Instruments

Message Edited by stilly32 on 11-03-2006 10:49 AM