A force-torque transducer data acquisition system is shown below:
As shown in the above illustration, basically a six-axis transducer is powered and amplified by an interface electronics and then the differential ended output voltages are coupled to a data acquisition hardware to be processes by a PC.
Some civil/mechanical engineers mount a model on the top of the transducer and apply wind to analyse vibrations. They rotate the model and apply wind to measure vibrations for different angles.
Recently they have been telling that, when they take offset(no wind condition) during the measurements they observe drift. I first thought it could be the excitation voltage but then I know the voltage inside the electronic interface is very stable. The drift is observed during an offset measurement. I also have been told that the temperature is not changing during the 1 minute offset. So drift most probably is not due to the temperature of power supply.
In the manual here there is a section about drift and hysteresis:
I have never heard something called "mechanical coupling" and in this case I don't understand what they mean by:
Make sure the tool and tool adapter plate and the transducer body are isolated from each other
I don't know the amount of drift at the moment and for now I suggested them to wait for the drift to settle and then take measurements. But soon I have to go to investigate about these.
What can be done as a procedure to verify the root cause of the drift in this case? And what is meant by "mechanical coupling" and isolation in the manual?