1. The muffle furnace controller should be limited to the ambient temperature range of 0-40°C.
2. Keep the furnace clean frequently, and remove oxides and other things in the furnace in time.
3. During use, when melting samples or burning precipitates with alkaline substances in the furnace, the operating conditions should be strictly controlled, and a layer of refractory board should be laid at the bottom of the furnace in advance to prevent corrosion of the furnace.
4. Be sure to cut off the power supply when loading and taking the sample to prevent electric shock.
5. Do not put the sample stained with water and oil into the furnace; Specimens should not be loaded with clamps stained with water and oil.
6. It is forbidden to fill any liquid into the furnace.
7. The opening time of the furnace door should be as short as possible when loading and taking the sample, so as to prolong the service life of the electric furnace.