I am using arduino nano microcontroller and MAX31856 ADC which using SPI communication. 8 K-type thermocouple are using. Here the temperature reading is getting varied the difference between all temperature value should be 0.5 but it is more than that how to solve this issue?
Please provide:
- A schematic of the circuit as you've built it
- A good photograph clearly showing how you've connected everything
- A description of the object/material whose temperature you're measuring and the actual temperature and temperature transients in said object/material
- The code you're running on your Arduino board
- The expected behavior of your code, and the actual (unintended) behavior
Please note the above is not an "either/or" list, but you need to provide all of it to prevent an endless back and forth.
its not an adc.
Ya I will provide all things what you mentioned but the code is working correctly. Below i shared the some of the readings which we taken from our side.
2029,25.99,25.94,25.32,27.23,27.09,26.39,27.30,26.93,29.34
1st and last are time stamp and cold junction between there is 8 sensor value the difference between each sensor value should 0.5 but it is more than that.
Okay, you've provided a small part of the fifth item on the list. Thank you so far, we're looking forward to the remaining ~90% of the information required.
Thermocouples are useless for measuring temperatures around ambient - the output from the thermocouple will be virtually zero , and any reading you get is dominated by the cold junction compensation circuit .
Look at the error values for the chip too z!
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