I always have a tough time with reading thermocouples with a micro.  In 
the past, I have used much to expensive chips like the AD595 which works 
o.k. if you make the system configurable in terms of whether the 
negative input is tied to frame ground or not (this is my biggest 
problem with thermocouples - the signal being swamped by ground currents 
that I think are running through the frame of the equipment the probe is 
mounted to).  I've tried designing with the Cypress PSOC devices using 
their thermocouple references, and ended up with way too much noise that 
had to be filtered.  Is there a down and dirty way to measure 
thermocouples reliably even when they are not isolated?

Thanks,

Tony

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