There are sources of electromagnetic fields, but it doesn't bother the other systems. I have already changed the module. Out of interest(newbie here) I am assuming the calibration settings are stored in the CPU which is located in the HMI.
I Have 4 weighing systems, identical hardware and software, one of which has a weight display issue. The reading whether empty or loaded fluctuates. I have measured the input to the IO LC1 card and it is steady to within a 0.1mV. What am I missing? the system has been calibrated, but doesn't improve it. The other 3 system work fine.