The ceramic fiber muffle furnace is a periodic operation type, which is used for element analysis and determination in laboratories, industrial and mining enterprises, and scientific research units, and heating for quenching, annealing, and tempering of small steel parts. , High temperature heating for dissolution and analysis.
Installation and use of ceramic fiber muffle furnace:
1. After opening the package, check whether the ceramic fiber muffle is intact and the accessories are complete. The general muffle furnace does not need special installation, just lay flat on the flat ground or shelf in the room. The controller should avoid vibration and should not be placed too close to the electric furnace to prevent internal components from working properly due to overheating.
2. A thermocouple is inserted into the furnace chamber 20-50mm, and the gap between the hole and the thermocouple is filled with asbestos rope. It is better to use compensation wire (or insulated steel core wire) to connect the thermocouple to the control. Pay attention to the positive and negative poles and do not connect them reversely.
3. An additional power switch needs to be installed at the introduction point of the power cord to control the total power supply. In order to ensure safe operation, the electric furnace and the controller must be reliably grounded.
4. Before use, adjust the thermometer indicator to the zero point. When using the compensation wire and cold junction compensator, the mechanical zero point should be adjusted to the reference temperature point of the cold junction compensator. When the compensation wire is not used, the mechanical zero point Adjust to zero scale, but the indicated temperature is the temperature difference between the measuring point and the cold end of the thermocouple.
5. After checking the wiring to confirm that it is correct, cover the controller housing. Adjust the setting pointer of the temperature indicator to the required working temperature, and then turn on the power. Turn on the power switch. At this time, the green light on the temperature indicator is on, the relay starts to work, the electric furnace is energized, and the ammeter shows the current. As the internal temperature of the electric furnace rises, the pointer of the temperature indicating instrument also gradually rises. This phenomenon indicates that the system works normally. The heating and constant temperature of the electric furnace are indicated by the traffic lights of the temperature indicator, the green light indicates the temperature rise, and the red light indicates the constant temperature.
Maintenance and precautions:
1. When the ceramic fiber muffle furnace is used for the first time or used again after a long-term shutdown, it must be baked. The oven time should be 200 ℃ for four hours at room temperature. 200 ℃ to 600 ℃ for four hours. During use, the maximum temperature of the furnace must not exceed the rated temperature, so as not to burn the electric heating element. It is forbidden to pour various liquids and easily soluble metals into the furnace. It is better to work in Maofu furnace below 50 ℃ below the maximum temperature.
2. The muffle furnace and controller must work in a 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 are required to be heated, a large amount of volatile gas will affect and corrode the surface of the electric heating element, which will destroy and shorten the life. Therefore, when heating, it should be timely prevented and properly sealed containers or appropriate openings to be eliminated.
3. The muffle furnace controller should be limited to use within an ambient temperature of 0-40 ° C.
4. According to the technical requirements, regularly check whether the connections of the electric furnace and the controller are good, whether the pointer of the indicator is stuck or not, and use a potentiometer to check the instrument due to magnetic steel, demagnetization, wire expansion, and spring Increased error caused by fatigue, balance damage, etc.
5. Do not pull out the thermocouple suddenly at high temperature to prevent the jacket from bursting.
6. Always keep the furnace chamber clean and remove oxides and the like in the furnace in time.
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