6212 wrong measurement

[++flo++11]

Hello,

I have some trubble to measure with a USB-6212-USB

It's cofigured to measure differential and 5 Chanals are used. All of them should measrue a different voltage.

The inputs are connected with ossciloscope probes. (Tip to the signal and the small wire to ground)

Input is set to Floating and the 6212 is decoupled from the PC with an USB-Isolator.

When I look at the signals with NI MAX Testplane everything is fine.

But when i use Labview or if i generate a Task in NI MAX the measruement values are wrong and all are nearly identical.

I hope someone has a clue how to solve this problem.

If i forgot some detail, feel free to ask.

Thanks

Florian

[JaninaH]

Hi Florian,

could you show me a screenshot of the preferences of the NI MAX Task or your LabVIEW Code? Maybe you made some wrong settings, because I tried to create a task with an USB-6212 and it works fine.

Have a nice day,

Janina