02-17-2020 04:21 PM
The datasheet states a +/-15 % variability from sensor to sensor in IAQ. Is the same for the sIAQ output?
Solved! Go to Solution.
02-17-2020 05:20 PM
Sensor-to-sensor deviation is only specified for to the 'IAQ' output, thanks to its "auto-scaling" (part of the self-calibration process in the background), but isn't specified/doesn't apply to the sIAQ output (and its derivatives) due to its 'unscaled' behavior.
02-18-2020 10:02 AM
Thank for the quick response. I understand that the sIAQ is not affected by autoscaling during calibration, so sensitivity is not changed. But does it have any "zero" adjustment during calibration? Can we ignore the IAQ accuracy output if our application is based on sIAQ?
Finally, If sIAQ is not affected by calibration, do we sitll need to store the state in a flash memory to retrieve in case fo power a cut?
02-18-2020 10:14 AM
Yes, the sIAQ still does "zero" adjustments in the background! Making use of the IAQ accruacy or state string is always up to the specific application requirements. Reloading the state string can usually still improve the user experience by rapidly recovering the calibration data. IAQ accuracy could still provide some level information, especially if it drops down to 1.