Provides support for ITS-90 thermocouple linearization, Type K thermocouples.
- convert a mV reading into an absolute temperature (C or F)
- convert a mV reading + ambient temp reading to a compensated sensor temperature
- convert a temperature (C or F) into the corresponding mV value
Author: Jim Gallt ([tc4-shield] (https://code.google.com/archive/p/tc4-shield/))