I am facing an acute problem with the RTD which I am using for a bioreactor control. A DC motor is used for agitation of the bioreactor. The RTD is a three wired one and it is calibrated everytime before experiment. It gives high and erroneous reading when the agitator motor is switched on. The bioreactor is a bottom driven vessel. I even tried earting the motor and the control panel to minimise the signal noise with little sucess.It has been hindering my experimental work.
Could any of you suggest a solution? Thanks in advance