have just completed tests on EVM module with SPIO4 board and Alphaense NO sensor - reference calibrated gas of 23.6ppm NO
Getting the following results when its exposed to the gas for an extended period graph below shows it over approx. 80 minutes, have run the test with both internal and external reference settings
The initial response from ambient overshoots but quickly settles but then drops gradually as time goes on, anyone any solution for this drift?
Result when external reference used.
Re-running the same test with internal reference seems to make it worse