Self Calibration

[Schliepe]

Hello,

This is a more generic question about self calibration.  I'm going to be writing some software to initiate the self calibration of PXI cards we have in our chassis.  Is there a way to know if I need to remove connections to a PXI card or if I can leave the connections present?  I only ask because I've been told we blew out some DUTs because they were connected when we performed a self calibration.  I think they were connected to some AO pins on a DAQ card, but I've got SMUs and DSA cards as well.  Do all inputs disconnect from their connectors to make the separate connection to the internal references?  Or will leaving cables connected influence the self cal?

Thanks for anyone that can help.

Erich

[tobriant]

Howdy Schliepe,

The best way to get an understanding of the calibration procedures for your devices are to read the product manuals or the calibration procedure PDFs we have on our website.

Does My DAQ Device Support Self Calibration?

Calibration Procedures

Each device has best practices for how long the device should be running, what external connections you might want to make, etc.  I'm not sure if this information is going to be programmatically available so you could handle this in code, but if you have consistent hardware in your chassis you could have a defined VI to iterate through the different devices and run this setup.

I would only keep connections that are listed in the procedure documents.

[Schliepe]

Thanks Tyler,

The issue is that there isn't any documentation around the self-calibration that would tell me what happens at the connections.  Self Calibration is also not that well documented, other than what I could find about internal references, but there is nothing I could find that talks about what that means to the card connectors.  The normal calibration documents aren't very helpful either because the idea there is to connect external instruments to inject known signals so the expectation is that the system is using those connections.

I understand if that information isn't really available, I was just hoping that it was out there somewhere.

Erich