![]() Alarm/error/out_of_range comparators, it is possible to get warning when temperate is outside a specified range.Cold junction compensation, a thermocoupler is relative, something is needed to compensate for ambient.High resolution ADC, 19 bits resolution, this means considerable better than 0.1☌ resolution.Input protection, it can handle up to +/- 45V on the thermocoupler inputs.The chip basically has everything inside: One module with the MAX31856, I uses this module because it has 5V conversion. ![]() The connector at the other end will often affect precision. They output a very small voltage depending on the temperature difference between the connections. Precision depends on the exact alloys used, not on the thickness of the wires. The other end is bare wires, banana plugs or special thermocoupler connectors. They consist of two wires that are usually welded together in the sensitive end. This means I wrote my own library with nearly full support for all functions in the chip. I prefer libraries that do not block for a long time. ![]() First I checked the existing Arduino library, but gave it up fairly fast when I saw a delay(250) in it. I needed to use some thermocouplers and the MAX31856 looked like the right chip for it. Thermo coupler library (MAX31856) Thermo coupler library (MAX31856)
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