ddd4114
forum member
The DashDAQ has two 0-5V 10-bit inputs, so I just chose a load resistor for the thermistor and wired it so the analog input is fairly linear between 50 and 150 degC (since that's the area I care about). Then I used a feature in the DashDAQ that lets you upload a custom calibration for the channel.
I thought this was the most practical approach for measuring oil temperature throughout the time I own the car, but there is a downside. Since the thermistor OD is not much smaller than the minor diameter of the drain plug, I had to use a lathe to modify the OEM drain plug. Hand tools would not be accurate enough unless you made some sort of jig.
There are certainly other ways to do it, some of which are easier than this, but this was best for my purposes.
I thought this was the most practical approach for measuring oil temperature throughout the time I own the car, but there is a downside. Since the thermistor OD is not much smaller than the minor diameter of the drain plug, I had to use a lathe to modify the OEM drain plug. Hand tools would not be accurate enough unless you made some sort of jig.
There are certainly other ways to do it, some of which are easier than this, but this was best for my purposes.
