Its running ok . Then on 11th Aug 08:26 test start to show zero dkh.
All other tests after 08:26 is show zero dkh.
I check the setting when I am home around 18:30 and found Reference value for both low and high were zero.
and baseline calibration was on.
I did not do any setting change why the reference value and the baseline calibration can change by itself?
Is this normal?