I have got my raceDAC set up and working for my NTC and other analog inputs it's working OK
Now I want to monitor exhaust gas temperature so using K type thermocouple on a spare analog input.
However, I am not seeing any results with change of temperature, the K type thermocouple has polarised inputs.
What's the proper way to connect thermocouple to RaceDAC ??
Comments
https://en.wikipedia.org/wiki/Thermocouple#Type_K
Type K (chromel – alumel) is the most common general purpose thermocouple with a sensitivity of approximately 41 µV/°C.
That is 41 microvolts per celsius degree. That is why you need an amplifier which boosts the signal level to 0-5 000 millivolts or 0-15 000 millivolts; which are the measuring ranges of RaceDAC.
A couple of examples/ You can use RaceDAC +5V output to power up these:
http://www.adafruit.com/products/1778
http://www.adafruit.com/products/269
Thank you for the information and the links to the prebuilt modules - this has been very helpful to me.
As I am using 2 stroke engine, the EGT measurement is an important tuning factor..
I looked in the RaceDAC documentation, but no reference to any thermocouple typical connection example.
Consideration, perhaps for future RaceDAC documentation inclusion.
Thanks again !!
http://www.adafruit.com/products/1778
On the left: + and -, to thermocouple
On the right:
V+ is the power input, connect to RaceDAC +5V
GND and GND, to RaceDAC GND
OUT is the analog signal, to analog input in RaceDAC
Forget the second one:
http://www.adafruit.com/products/269
It needs SPI data interface.
For the time being it's not a problem, I ordered some of the AD8495 pre-built modules it's easy to wire, I just need to make it strong to withstand vibration etc on racing bike.
Thank you for creating RaceDAC and Racechrono !!
We have created only the RaceDAC.