Why Two PXI-6281 Aquire One Sensor,Data are Very different

[bsp0321]

I has a press sensor（-2~2V）->(-60KN~60KN);

Use tee connect two PXI System(PXI 1045+PXI 6281)

Occasionally，I get data waves very different.

Can explain it。

below is two PXI System waves data plot at a graph.(rate = 100kS/s)

[Henrik_Volkers]

The differences in the signal look symmetric, so I would assume a unwanted current in a sensor line, resulting in a voltage drop that adds for one channel and subtracts on the other.

How are the sensor and the PXI systems connected in detail (incl. Powersupply) ? (every wire!)

Do you use other channels of the 6281?  DOes it correlate with other IO ?

[bsp0321]

谢谢您的回复，出差刚回来