... the temperature still can’t reach about 217°C,then increase the temperature of the third and ... Illustration:when the actual measured temperature reaches 205°C,then adjust the upper and bottom heating ... ,actual temperature is 195°C,suggest to increase 30°C of bottom, 20°C of upper. Upper Temperature ... now the bottom temperature need be increased about 10°C.3, What’s the function of “Air Regulator ...