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MCC128 DAQ measuring the same on all channels


GUosong

Question

I am struggling with the MCC128 board that AD the same thing on all channels

As enclosed, it is an example for ch0 input of a battery voltage.

Then, I run the example finite_scan.py which AD of channels (0,1,2,3).

Suprisingly, all the channels show almost the same value.

I have tried other single channel logging, but all the others show the same thing.

Could anyone share their experiences?

Thanks a lot!

2023-11-14_14-44-58.png

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The MCC 128 is a multiplex board meaning the channels share a single A/D converter. On these types of boards, channels that are left open will mimic adjacent channels. The solution is to not read open channels or connect them to the ground when unused. 

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