Wrong hotbed temperatur.

I upgraded my printer with a Orbitool toolboard and after gone true the setup my hotbed thermistor shows 7 cellsius in roomtemp (not connected to toolboard BTW), i use a laser to se what the real temperatur is and ther is a differens of 17 degreas. i have tryed 3 different thermistors and its the same problem so it must be a software isue, i can find the pullup_resistor for the hotend but where is the hotbed hiding? cant seem to find it, and is there a bether way to callibrate the thermistors ?

and second whay is hotend powerdraw in celsius. can i fix that?