[Periodical spikes when using MCC 172 and so on]

@skycraper3 Yes, we replaced the sensor and cable for testing, and found that this problem still occurs.

[Periodical spikes when using MCC 172 and so on]

We tried to use higher precision DAQs in parallel to MCC 172 port for synchronous signal acquisition, and found that both DAQs would have electrical pulses.

[Periodical spikes when using MCC 172 and so on]

I found the same problem when IEPE enable. The current channel is connected with a 50 ohm short circuit. 

Two MCC172 boards are installed in the current equipment. When electrical noise occurs, the other three channels also appear at the same time.

I tried to use the Raspberry Pi 3B and 4B, and replaced different power adapters and different MCC 172 boards. The problem still exists.

However, the data is normal in the IEPE disable.