NI 4351 current source instability

[lbelhumeur]

The internal current source of the 4351 should be 25 µA. Actually, initialization using the measurement and automation tool gives 25, but our application will give us 29. How come? The card is actual "initialize" at 2 places in the code. The first time is for setting some I/O directions and the second for temperature acquisition. I joioned the code. THanks

[Ben]

Are you reading from more than one input?

These devieces are very acurate but dog slow. The more channels you scan through, the slower you can read to high precision. Using auto-zero in-between gives you better readings.

Do your inputs look right using MAX?

Ben