T3_8AO6DO Analog input fluctuates

The NTC 10K sensors values fluctuating a lot.
The T3 is Bacnet connected.
Is there a solution to get more stable readings ?

In the T3000 program the readings are stable.

Have you experimented with the filter setting? The default of 5 is usually good enough but you can try some higher values. This will smooth out the readings, too large a value can make the readings sluggish.

Another thing to watch out for is the grounding, if there are any other powered devices such as controllers, transducers and actuators in your system make sure they are all sharing a good solid connection to GND which is in turn connected to earth at every cabinet and every power supply.