1. Find the humidity sensor of Murphy air dryer, which is usually located at the top or side of the machine. Remove the sensor and connect it to the control panel on the machine.

2. Find the humidity adjustment button or knob on the control panel, press or rotate the button to make the machine start to adjust the humidity.

3. In the process of adjusting humidity, we can judge whether the humidity meets the use requirements by observing the humidity display on the machine.