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Originally Posted by BillA
it still gets back to the PRTD's non-linearity over our range of interest
no way to avoid creating a cal curve that I know of, at 1/3 DIN they are pretty much the same - but still have a curve
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What do the labs use, then? A very linear measurement device that is calibrated to triple point water and something else like melting point of <X> ? Do they look at emitted light frequency for dark body radiation for some known substance?
There's a limit to the number of reference points you can create until you start using another measurement device like boiling point of water at X mm Hg and then try to accurately measure air pressure.
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Originally Posted by BillA
of course, on the censored forum the resident wizard has concluded that 0.1°C resolution is sufficient for WCing component testing, we do love to pick the pepper
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censored forum? need 0.01C to test some devices, esp rads. not sure how sensitive you need to be when testing tubing.
