Hello,
I am setting up temperature control application. Controlling a furnace using V350-35-TR20 (PID Control), thermocouple type K (Omega KQXL-116G-9 M ) input
to TC module IO-ATC8. Have problem with temperature accuracy. TC reads correctly when no power is being applied to furnace, as soon as power is applied
to heating elements temperature/process value jumps dramatically, the higher the temp the further off it is, up to 100°. when power is removed temp drops back
to being accurate as verified against other controllers.
I am using type k shielded cable. Have tried grounding shielding at either end of cable. Have many furnaces wired in similar fashion to stand alone temperature
controllers without this problem.
Any Thoughts?