I am developing a device which opens and closes a cover over a raditor to control engine coolant temperature. The device works with a K Type thermocouple. The drivers computer can also read the temperature with a thermistor sensor. A link to the data sheet is below, but it has limited value as it is incomplete.
I also attached a pic of the only useful page which has the pin out.
Is the code different for NTC and PTC thermistors? I have only been able to find sample code for the NTC type. I have been able to read the temperature but it fluctuates too much and does not go up and down with heat. Also I was able to measure about 110 ohms across A0 & GND. Also this vaule does not change with heat. It has three active wires, VCC, GND, Analog Signal. The 4th wire is GND also but not used. The sensor works when hooked up to the drivers computer(mounted on the steering wheel).
Any help would be much appreciated.