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Originally Posted by bigben2k
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nice links Ben, did you read them ?
"If you use a PGA = 128, you would have an rms resolution of about 104 nV and a noise-free resolution of about 660 nV. The full-scale range of the A/D converter with a PGA = 128 would be limited to about ±20 mV, which exceeds the input signal range of 27 mV. But you could use the offset D/A converter to subtract 10 mV from the input signal, which would move the RTD signal back into the full-scale range. You would then have rms temperature resolution of about 0.003ºC and flicker-free temperature resolution to about 0.02ºC."
now I get flicker free resolution of 0.01°C with a Fluke 2180A, on eBay for $80 or so, with an instrument accuracy of ±0.02° after cal
but no, clever Ben is going to re-define low-cost high-resolution temperature measurement devices
Ben, why do I make THESE kinds of posts ?
So that others, less informed, do not mistake your commentary for useful, productive, or realistic