Resistor Temperature Detectors ( RTD ) made from Platinum (Pt) are more accurate than thermocouple wires for measuring temperature. A 2-wire PT-100 RTD was tested using a MAX31865 RTD to digital converter chip on an evaluation board, and usb-spi dongle controlled by SpacerLabs "SpiConfig v3.0" software.
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| The tiny PT100 RTD is just visible on the extreme right |
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| Result of reading measurement data from MAX31865 using 'SpiConfig' |
From the MISO ( master in, slave out ) bytes the temperature was found to be 19.92 C.
[ Note: PT-100 has 100 ohm resistance at 0C ].
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