一、 The use of high-temperature box-type electric furnace

　　1、Turn the center screw at the lower end of the cotton plate of the temperature indication regulator to adjust the zero reference point;

　　2, rotate the temperature indicator regulator panel right under the foot screw, the temperature indicator regulator set pointer adjusted to the desired working temperature position;

　　3, after checking the wiring of the ministries, close the power supply, press the switch to turn on the power supply, at this time, the temperature indicator regulator left indicator light;

　　4, heating process, should be gradually warmed up in stages, to be the temperature indicator needle rose to the set temperature value, in the temperature indicator regulator under the action of the high-temperature furnace through the contactor power off, at this time, the temperature indicator regulator right red indicator light, the furnace temperature gradually decline. When the temperature indicator regulator needle back away from the set temperature value, in the temperature indicator regulator under the action of the contactor and energized, at this time the green light is back on. So the repeated action of the contact, so that the furnace temperature to maintain a constant temperature.

二、 The use of high-temperature box-type furnace note

　　1, high-temperature box-type furnace should be placed on the flat ground or concrete, and the control panel placed in the position can not be too close to the furnace, so as not to overheat the electronic components can not work properly.

　　2, electric furnace in the power on, must check the control panel is not in the operation process needs position. Detect the instrument good grounding method: close the door, check the instrument dial on the instrument are indicating the corresponding data, if the indication of the instrument is zero, the instrument grounding is invalid, can not work properly.

　　3, after a long period of time out of use, and then use to 300 ℃, 4 hours of baking and drying, the working environment without blasting and corrosive gases.

　　4, in the high-temperature box-type electric furnace for specimen firing or melting, it is necessary to place the specimen in a high-temperature-resistant crucible and strict control of the operating conditions, in order to prevent excessive temperature and the onset of the sample liquid splash, corrosion and bonding of the furnace chamber. The bottom of the furnace chamber to put a corundum mat board, and should be promptly removed from the mat board on the slag, metal oxides or other impurities, in order to protect the cleanliness of the furnace chamber.

　　5, can not be filled with liquid and molten metal to the furnace chamber, in the replacement of the wire must bear in mind not to take out the furnace chamber. Should be the first to go down the back panel of the furnace body, and then remove the bottom bolt fixed furnace inner set, turn over the inner set of the back cover, remove the furnace door frame, and then replace the furnace wire, this is the correct step.

　　6, high-temperature box-type electric furnace used in the process of natural aging of silicon carbon rod, can be leveled to high, heat if the lack of (i.e., the power does not reach the rated value), should be replaced with a new silicon carbon rod.

　　7, the crucible, crucible frame and other items into the furnace chamber, do not touch the thermocouple, because into the furnace chamber thermocouple thermal contact in the high temperature brittle and to section.

　　8, after each use must cut off all the power supply, automatic cooling off the furnace door.