External temperature sensor calibration
Update May 2015
This calibration is unneeded for all modern controllers, as the default software values match the current controller/LM61 combination.
Following some requests, I’ve just measured and calculated the proper coefficients for adjusting the EXTERNAL temperature sensors.
We have 3 factors, as seen in the software (v. 3.0+), C1, F, and C2.
C2Â is mainly for offseting the internal box excess temperature, so won’t be used for the external ones.
FÂ is the slope of the straigh line
C1 is the offset (that is, the value read at 0º)
So, going to business, for the ARMADILLO or PLATYPUS CONTROLLERS:
*Â Â Â Â using the LM61 temp. sensor: C1 = 192, F = 1.7
*Â Â Â Â using the LM60 temp. sensor: C1 = 94, F = 3
And for the “CLASSIC” SELETEK CONTROLLER:
*Â Â Â Â using the LM61 temp. sensor: C1 = 190, F = 3.6
*Â Â Â Â using the LM60 temp. sensor, I’m getting odd results, but I’m fairly confident the same values as the internal sensor will work (no isolation in this model), so: C1 = 133.5, F= 4.88