Analog input amplification

[pdan]

I've inherited some (Traditional NI-DAQ) LabVIEW schematics that I need to modify - the input level is too low. I'm not really familiar with LabVIEW though; if I were using LabWindows I'd issue a command to set the amplification to a specific level, but I can't seem to find an equivalent box to do that in LabVIEW. Does setting the high/low limit for something like AI Acquire Waveforms automatically change the amplification? If not, what should I use? If so, is there a way to get the program to return the level of amplification?

[e-Cash-Money]

Hello pdan,

You are absolutely correct. LabVIEW will use the input limits you specify to determine the best gain settings for the channel. In order to programmatically determine the gain in LabVIEW, use the AI Hardware Config VI. Call this VI after you call the AI Config VI. Pass only the task id to the AI Hardware Config VI to indicate that no hardware settings are to be changed by calling this VI. The output cluster of the AI Hardware Config VI returns the gain used by the DAQ device.

E.Lee