Hello,

On my fresh water tank, PH sensor is set Nocturnal change to yes with change of: -1, starttime: 21:00:00, endtime: 09:00:00.

Now, it's 13:21, Ph actual value is 5.15
Nominale value 6.50
Hysteresis 0.20
Alarme Active, deactivate control:no, max deviation: 0.50

-> If I set Nocturnal change to no, alarm ring!

But at 13h21 we are not in the 21:00:00 - 09:00:00 period.

What i do wrong?

Thank