Mine is the 60L analog version...it's usually at 40%...read somewhere that RH should not be lower than 40% to prevent lub from drying out...and 40-50% is the range for lens and cam...
yes.
it takes a few days to lower the humidity.
i set it at close to max when first bought it. it remains around 50% for the next few days before reaching 21% after a week. then i have to dial the nob all the way back to the 9~10 o'clock position.