Hi, just wanted to provide an update. It appears that what is happening is that the DC brush-less motor and controller are radiating a significant amount of noise. Some of my sensors are installed in stainless steel pipes that have no electrical connection to the frame of the power plant. The...
Thanks again, I appreciate it. It sounds like the pressure sensor is experiencing saturation resulting from a ground loop situation. I wonder if the sensor has been damaged making it more susceptible?
I am currently putting all your ideas into a test procedure that I can run on my next trip...
Hi Dan,
Thanks for the response. The setup is at another facility but I will be traveling back there again soon. I will take the measurements you have suggested.
The 24 VDC power supply is floating, its negative is not connected to the frame of the system.
The transmitter is a two wire, 24...
I recently observed some strange pressure sensor behavior and am looking for some troubleshooting assistance. We have a number of 0-10 barg, 4-20 mA output pressure sensors. They are installed in an air and coolant supply system. The air compressor motor in the system is a brushless DC motor...