Channel 0 of SCXI-1125 is floating

[edlu]

I have a PXI-1010 chassis with a 6070E connected via the backplane to the SCXI-1125 boards (4 pieces with SCXI-1313 terminal blocks).
On Channel 0 of all the SCXI-1125 boards I measure a voltage which is always equal to the upper limit of the range setting.
The measured voltage on channel 0 does not change when i connect a wire between inputs CH0+ to CH0- of the SCXI-1125.
Channels 1 to 7 give the correct values.
What can be the reason that channel 0 does not give the correct measurements?

[RikPrins]

Hello,

I would suspect the backplane of the chassis in this case. I do not think anything is wrong with the DAQ board because all channels of the 4 SCXI-1125's are multiplexed on 1 channel of the DAQ board. It would really be a coincidence when all for 1125 have the same channel defective.

I suggest, if the problem still exist, to get in contact with the local NI office to figure a way to solve this problem or to start up a repair procedure.

Best Regards,

RikP
Application Engineering
National Instruments