Muffle furnace, box-type resistance furnace installation and use

Muffle furnace in China generic name for the following: furnace, resistance furnace, Burnout Furnaces, muffle furnace. Muffle furnace is a common heating equipment based on appearance and shape can be divided into box-type furnace tube furnace crucible furnace. Divided by nationality of domestic and imported muffle muffle furnace. Distinguished by the heating elements are: electric stove Sima Fu furnace, muffle furnace silicon carbide, silicon molybdenum rod muffle furnace; according to the rated temperature to distinguish generally divided into: 900 degrees series muffle furnace, muffle furnace 1000 degrees, 1200 degrees muffle furnace at 1300 degrees muffle furnace, muffle furnace 1600 degrees, 1700 degrees muffle furnace. Press the controller to distinguish between the following categories: pointer table, ordinary digital display table, PID regulation control table, the program control table; distinguished by insulation material: ordinary firebrick and ceramic fiber two kinds.Muffle furnace cycle mode of operation for the laboratory, industrial and mining enterprises, scientific research units for elemental analysis and general small steel hardening, annealing, tempering heat treatment, heating, high temperature muffle furnace can be made of metal, ceramic sintering, dissolution , analysis, high-temperature heating.Muffle furnace installation and use:1, after opening the package, check the muffle furnace is intact, accessories are complete. General muffle furnace does not require special installation, just flat on the ground or indoor flat shelf. Controller should avoid vibration, placement and should not be too close to the furnace, to prevent overheating and causing internal components can not work properly.2, a thermocouple inserted into the furnace 20-50mm, the gap between the hole and the thermocouple asbestos rope packing. Connect the thermocouple to the control is best to use compensation wire (or insulated steel core wire), pay attention to the positive and negative, not reversed.3, in the power cord into the power switch at the need to install in order to control the power. To ensure safe operation, the controller must be grounded furnace.4, prior to use, the thermometer indicator adjusted to 0:00, in the use of wires and cold junction compensation compensation, should the mechanical zero adjustment to the cold junction compensator reference temperature point, do not use compensation wire, then the mechanical zero adjusted to zero-scale bits, but the indicated temperature measurement points and the thermocouple cold junction temperature.5, after confirmation by checking wiring, cover the controller enclosure. The temperature indicator setting pointer adjustment to the desired operating temperature, then connect the power. Turn the power switch, then the green light on the temperature indicating instrument both light, relay start working, electric powered, ie a current meter display. As the internal temperature furnace, the temperature is gradually increased indicating instrument pointer, this phenomenon indicates that the system is working properly. Furnace heating, constant temperature, respectively, the temperature indicator of traffic lights, the green light indicates warming, red light means constant temperature.Maintenance and precautions:1, when the first use of a muffle furnace again after disabling or long-term use, the oven must be carried out. The oven temperature 200 ℃ time should be four hours. 200 ℃ to 600 ℃ four hours. When used, the furnace temperature shall not exceed the maximum rated temperature, to avoid burning heating element. Prohibit the furnace infusion of liquid and soluble in a variety of metals, Burnout oven below the maximum temperature of preferably below 50 ℃ work, then furnace wire has a longer life.2, muffle furnace and the controller must not exceed 85% relative humidity, no conductive dust, explosive or corrosive gases in the workplace. Where the grease is attached to a metal material being heated, the volatile gas will affect a large number of heating element surface and etching, so that destruction and shortened life span. Therefore, the heating should be timely prevention and well sealed containers or suitable openings to be eliminated.3, muffle furnace controller should be limited to the ambient temperature 0-40 ℃ range.4, according to the technical requirements, regular and frequent checks furnace, the controller of the wiring connection is good, whether the indicator pointer moves stuck stranded phenomenon, and because electricity meter calibration potentiometer magnets, demagnetization, up wire, shrapnel fatigue, balance error increases caused damage situation.5, thermocouples do not suddenly pull out at high temperatures to prevent the jacket burst.6, and keep the furnace clean, timely removal of the furnace oxide and the like things.