K type thermocouple arduino12/28/2023 There is no reason to sand off the markings if it is legit, after all there is not design to guard. If yours doesn't have any text on it I would suspect a fake or reject of some sort. You should be able to see the "K" on the chip itself. I can't find much else on this issue online, any suggestions on how to fix this? Thanks!įor example, using my last two firings and using a 05 pyrometric cone as a reference, one firing read 950☌ and the cone was bent fully (which would be about 1020☌ given my ramp) and the other at 850☌ with the cone being a complete puddle and the ceramics starting to bubble which would suggest it would be over 1200☌. Although mine is not through a computer and just usb directly to an outlet so not sure if that would also cause line-interference. They fixed it by unplugged and just using battery. Does the MAX31855 need to be shielded? I did see that someone was having issues with line-interference when powering their arduino through a usb cord on their laptop while it was charging. I’ve tried a few things to try and fix it such as moving the protoboard with all my components on it away from the kiln a few feet and putting it in a “heat resistant” container, as well as, turning off the wifi connection on the microcontroller to stop any interference it may be causing with the MAX31855. The thermocouple reads within 1-2☌ when compared to 2 kitchen thermometers between 0-100☌ but at higher temperatures seems to be way off causing overfiring. My code uses this linearization code found on adafruit site to correct the thermocouple temperature Maxim 31855 Thermocouple Linearization | Calibrating Sensors | Adafruit Learning System.
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