Problem with Non Reference Single ended and Differential measurements

[ASTDan]

I am doing a differential measurement and then a non referenced single ended AI measurement using the same PCI 6025E card. Most of the time I get good measurements however a small persentages of the time I get very strange measurements.

[Geneva L.]

This question actually belongs in the Multifunction DAQ category, rather than the Real-Time DAQ category, so you can find the question posted there with a response.