1, When the high-temperature Muffle furnace is used for a second time or is used again after long-term disuse, it must be oiled. Oven time should be room temperature 200℃ for four hours. 200℃ to 600℃ for four hours.
When used, the furnace must not exceed the rated temperature to avoid burning the electric heating element. It is forbidden to inject various liquids and easily dissolved metals into the furnace. The high-temperature Muffle furnace works below 50 ° C, and the furnace wire has a long life.
2, high temperature Muffle furnace and controller must be in the relative humidity does not exceed 85%, there is no conductive dust, explosive gas or corrosive gas work.
Where metal materials such as grease need to be heated, a large number of volatile gases will affect and corrode the surface of the electric heating element, causing it to be destroyed and shorten its life. Therefore, when heating should be timely prevention and do a good job of sealed containers or appropriate holes to be excluded.
3, high temperature Muffle furnace controller should be limited to the ambient temperature 0-40℃ range.
4, according to the technical requirements, regularly check whether the wiring of the electric furnace and controller is good:
Each temperature measuring thermocouple connected to the controller may cause interference to the controller, and the display value of the controller will skip and the measurement error will increase. The higher the furnace temperature, the more obvious this phenomenon is. Therefore, it is necessary to ground the metal protective tube (housing) of the thermocouple well, and if necessary, use a thermocouple with a three-wire output. In conclusion, all effective measures should be taken to reduce interference.
5, thermocouple do not suddenly pull out at high temperature, to prevent the jacket burst.
6, often keep the furnace clean, timely remove oxides and other things in the furnace.
7, in the process of use, when using alkaline substances to melt samples or burn sediments in the high-temperature Muffle furnace, the operating conditions should be strictly controlled, and a layer of refractory plate should be laid on the bottom of the furnace in advance to prevent corrosion of the furnace.
