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I want to set up a USB connected interface to three thermocouples and a pressure sensor.
The pressure sensor could be a 'strain bridge type' with an output accross its differential bridge outputs of 0-30mV (with a common mode votage <5V) or a 4-20mA type of sensor which I suspect with a 3 Ohm resistor could also make a differential voltage that this product could measure.
Critical to this adaption; a) Is the on-board bias current to the input terminals mentioned in the manual small or stable and predictable? b) Is there a software mode that reports mV rather than a thermocuple and cold junction computed temperature?
The 9211 will only support differential AI from 0-80mV. It will not be able to measure current. To measure an AI voltage you can use the example found under:
In this folder there are examples for the type of API you are using. I used the AI one point.vi for LV 7.1, and measured a voltage from 0-80mV. I hope this helps!