To adjust humidity start and stop %
START: Long press the “2 up" button for about 3 seconds. The required start humidity can be set by the up and down keys. Suggest 67%
STOP: Long press the “2 dn" button for about 3 seconds. The required stop humidity can be set by the up and down keys. Suggest 70%
To calibrate the sensor
Press the “2 up" and “2 down" button at the same time. Then adjust up or down to match second hygrometer which is used for calibration
Reservoir
Pegs
If pegs are too tight sand them lightly with 120/150 grit sand paper