MoTeC Global Forum

I had a stack dash based system on my race car and have moved over to a Motec based one. The oil temp sensor is the resistive based ST762 one. Has anyone got the AuxT calibration data for an M4 ? I'me having trouble finding out anything about this sensor... help!

A couple of options, if it was connected to the Stack do you have any calibration values that you used before. Alternatively, if you have some time on your hands... Use freezing cold water in saucepan on stove, sensor connected to M4 and do a custom calibration. You have to hold it at each temperature for at least 30mins to do this accurately.

Here at our R&D facility we use something a bit more sophisticated than what I have described above. An Environmental Chamber, which allows us to control the ambient temperature in effectively "an oven" (however it can also go to -40C) and hold the temperature for as long as we require. A sensor calibration will take us a full day to calibrate accurately.

I've tried asking Stack (now Auto Meter), and they won't release the data sheet, as its their IP, which I guess is understandable... so its option 2 for me.

I have a calibrated thermocouple meter as well, so I'll be using this in conjunction with the M4, sensor, saucepan and cooker... my partner will help me calibrate it seeing as she races the car as well

I'll try and raise the temps as slow as reasonably possible... I'm only after I reasonable indication not perfection.

Cheers

You need to raise the sensor to a known temperature and hold it there for a while (say 5mins). Temp sensors have mass to them so they can sometimes take a while to catch up...they usually read temperatures of fluids that also take ages to heat up.

I have done this successfully with a pot of oil and a blow torch before but obviously you need to be nice and careful.