What should be paid attention to when using hot air circulation oven

Hot air circulation oven is mainly used for drying, heating and heat treatment of test products in industrial and agricultural production, scientific research, medical and health, laboratory and other units Hot air circulation oven is not suitable for volatile, flammable and explosive materials When using the hot air circulation oven, the following precautions shall be taken: 1 The hot air circulation oven shall be placed at the dry level indoors, and the case shell must be effectively grounded 2 In the power supply line, the user shall install the on-off switch corresponding to the drying box current for the special use of this box 3 Each drying chamber is equipped with two wind winding shelves for placing the test object, and the shelf spacing can be adjusted according to the size of the test object The test object should not be placed too tightly to facilitate the hot air circulation The test object is not allowed to be placed on the bottom plate of the chamber to avoid the test object burning due to overheating 4 The hot air circulation oven is a digital display temperature controller When the continuous temperature is selected, press the temperature test setting number on the instrument panel to the required temperature to start working 5 Indicator light of temperature controller: the green light indicates that the electric heater is working, and the red light indicates that the heating stops When the temperature in the box reaches the set temperature, the green light turns to the red light After that, the temperature controller keeps turning over, and the traffic light turns on and off alternately, which is the constant temperature state However, due to the just constant temperature, the internal heating of the working room is not even, even when the set temperature is reached, the box is in the constant temperature state, It is possible that the residual heat will continue to rise, which will gradually disappear and become stable after half an hour 6 When starting up, in order to obtain the accelerated temperature rise time, turn the heating switch to high temperature Two sets of heaters are heated at the same time After reaching the constant temperature state, turn the heating switch to low temperature, leaving only one set of heaters to work to save power consumption 7 When taking and placing the test object, do not impact the sensor extending into the working room, so as to prevent damage and control failure caused by the sensor's temperature measuring head 8 Before starting the machine, unscrew the vent valve on the top of the box about 10 mm to facilitate the air conversion and convection in the box, and discharge the moisture and waste gas 9 If you want to observe the conditions of the samples in the studio, you can open the outer door or peep in from the glass door, but the outer door is not always open, so as to avoid heat leakage When the temperature rises to about 300 degrees, opening the box door may cause the glass to cool suddenly and crack 10 This series of drying boxes are non explosion-proof products Do not bake inflammable, explosive and volatile materials to prevent explosion 11 Cut off the power supply after use 12 In case of failure, it can only be used after repair.