How do I Calibrate the WS-2902 Sensors?
Press and hold the TEMP. and MAX/MIN buttons at the same time for 5 seconds to enter calibration mode. The CAL icon will be displayed:
To proceed to the next calibration setting, press (do not hold) the SET button.
To exit and save the calibration setting, press the LIGHT / SNOOZE button.
The table below summarizes the set mode sequence and commands.