2. Turn on the power, the red power indicator is on, turn the thermostat clockwise to turn the required temperature. The temperature is aligned with the required temperature position. At this time, the green heating indicator lights up, and the current has been supplied to this machine, electric heating tube starts to work, when the temperature rises to the required temperature, the thermostat can automatically cut off, at the same time, the green indicator light goes out and the heating stops. When the temperature drops slightly, the thermostat can automatically turn on the power, the green indicator light is on, the heating tube resumes heating, and the temperature rises, so repeat the cycle to ensure that the temperature is constant within the set range. Adjust the temperature as needed.