MoTeC Global Forum

Hey Guys,

Install is progressing well , I need to Calibrate a sensor that's not on the drop down list,

Delphi/GM/Packard 12160855 that I want to use for Engine oil temperature, has a wide range and quick response compared to some.

I have a resistance Vs Temperature Data how do I extrapolate that to the Voltage trace?

Data attached

Thanks in advance

I used to use a very primitive method.I put a mercury thermometer and a temperature sensor in a container filled with oil.Heating, referring to different voltages at different temperatures.Record a voltage at 10 degrees centigrade.
hope this helps!

If you are wiring the sensor into an AT input then there is a 1kohm pull up to 5V.

So Vi = Vs x (R2/ (R1 + R2))
where Vi = The input voltage
Vs = Supply voltage (5V)
R1 = Pull up resistance (1kohm)
R2 = Sensor resistance

As an example at 0deg: Vi = 5 x (37499/ ( 37499 + 1000) = 4.87V

Just create a spreadsheet with all the values then copy them into tune.