I have to repair or make a regel unit work (its a dutch thing)
http://prntscr.com/2a3hvbAs you can see this is the unit now i need to make it work in other words i need to bring the plastic tubes to the right place so i can make a water level stay at 35 in the tube at the side i hoped one of you ever saw this kind of test before and might understand it
SP stands for set point its a process thing
P.S i know my drawing and explanation is terrible still i hope some wold understand it
if u know a solution copy the pic in paint and draw blue strips as tubes to right places