for the purpose of calibration, I don't see the absolute constancy of the coolant temp as a big issue
unless of course you are trying to relate the CPU temp to the coolant
I would suggest putting the whole shebang in an enclosure, w/o circulation but filled, and plotting the readings over a range of temps
- the real difficulty with this is that the 'lag' of various parts will be diffferent so the determination fo equilibrium is crucial
(now the problem is holding everything at various temps to establish such)
you cannot have any temp differential between the CPU and the coolant temp/inlet sensor or you will have the whole host of temp offsets across the chain to deal with
- zero heat flux during calibration
I am assuming that everything is going to be 'calibrated' against (wrt) the coolant inlet sensor
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