Hi,
I'm currently testing MCC-172 for industrial application and for now using traditional non-IEPE two wire piezoelectric sensor (most propably this will be replaced with some other sensor in the future). I'm having lot of noise and it seems to be that it's coming from the cable between sensor and MCC-172. When connecting sensor directly on inputs, the noise is gone. How I should improve my setup?
From datasheet I noticed the Note: For best results, connect the signal source and the Raspberry Pi to a common ground. If a floating source is required, connect the MCC 172 to earth ground via the DGND screw terminal to minimize common mode noise.
What is meant with that sentence and how I should connect the two wire sensor to achiece common ground between Pi and the sensor?