Installation, use and precautions of muffle furnace (high temperature furnace)

Muffle furnace (high temperature furnace) belongs to the periodic operation mode, which is used by laboratories, industrial and mining enterprises and scientific research institutions for element analysis and determination, as well as heat treatment of general small steel parts such as quenching, annealing and tempering High temperature muffle furnace can also be used for high temperature heating such as sintering, dissolution and analysis of metals and ceramics Installation and use of muffle furnace: 1 After unpacking, check whether muffle furnace is complete and intact, and whether accessories are complete The general muffle furnace does not need special installation, only needs to be placed on the flat indoor ground or shelf The controller shall avoid vibration, and the position shall not be too close to the electric furnace to prevent the internal components from working normally due to overheating 2 Insert thermocouple into furnace 20-50mm, and fill the gap between hole and thermocouple with asbestos rope Connect the thermocouple to the controller Zui to use the compensation wire (or insulated steel core wire), pay attention to the positive and negative poles, and do not connect them reversely 3 A power switch shall be installed at the lead-in of the power line to control the main power supply In order to ensure safe operation, the furnace and controller must be reliably grounded 4 Before use, adjust the temperature controller to the zero point When using the compensation wire and the cold end compensator, adjust the mechanical zero point to the reference temperature point of the cold end compensator When the compensation wire is not used, adjust the mechanical zero point to the zero scale position, but the indicated temperature is the temperature difference between the measurement point and the cold end of the thermocouple 5 After the wiring is checked and confirmed to be correct, cover the controller shell Adjust the setting pointer of the temperature controller to the required working temperature, and then turn on the power Turn on the power switch, when the green light on the temperature indicator is on, the relay starts to work, the furnace is powered, and the ammeter has current display With the increase of the internal temperature of the electric furnace, the pointer of the temperature indicating instrument also rises gradually, which indicates that the system works normally The temperature rise and fixed temperature of the electric furnace are respectively indicated by the traffic green light of the temperature indicator, the green light indicates the temperature rise, and the red light indicates the fixed temperature Maintenance and precautions: 1 When muffle furnace is used for several times or is used again after long-term shutdown, oven drying must be carried out The oven drying time shall be at room temperature 200 ℃ for four hours 200 ℃ to 600 ℃ for four hours When in use, the furnace temperature Zui shall not be higher than the rated temperature to avoid burning the electric heating elements It is forbidden to pour all kinds of liquids and soluble metals into the furnace It is better for the muffle furnace Zui to work under the high temperature of 50 ℃ below Zui At this time, the furnace wire has a long service life 2 Muffle furnace and controller must work in the place where the relative temperature does not exceed 85% and there is no conductive dust, explosive gas or corrosive gas When metal materials such as grease need to be heated, a large number of volatile gases will affect and corrode the surface of electric heating elements, so as to destroy and shorten their service life Therefore, when heating, it is necessary to timely prevent and seal the container or properly open holes to eliminate 3 Muffle furnace controller shall be limited to the range of 0-40 ℃ ambient temperature 4 According to the technical requirements, regularly check whether the wiring of electric furnace and controller is in good condition, whether the indicator pointer is stuck when it moves, and use the potentiometer to check the increase of error caused by the magnetic steel, demagnetization, wire expansion, spring fatigue, balance damage, etc of the instrument 5 Do not pull out the thermocouple suddenly in case of high temperature, so as to prevent the jacket from cracking 6 Keep the furnace clean and remove oxides and other things in time Shangyu Star Instrument Equipment Co., Ltd is located in Daoxu Town, Shangyu District, Shaoxing City, Zhejiang Province It is an enterprise integrating production, product development, processing and trade The company's main products: drying box series, incubator series, laboratory muffle furnace series, distiller series, as well as clean workbench, air shower room, ventilation cabinet, biosafety cabinet and other complete sets of purification equipment The company has a strong technical research and development team, a strong after-sales service system, is the leading manufacturer of complete set of laboratory equipment in China, welcome customers to buy.