How to operate make calibrate a muffle furnace
ZZKD sells the Muffle furnace oven, which is made of vacuum-formed high-purity alumina multi-luminous material. It has low heat storage, excellent heat preservation and energy saving effects, and greatly reduces the total weight of the electric furnace.
Classification of muffle furnace
The muffle furnace has the following classifications according to its heating elements, temperature and controller: 1) According to the heating elements, there are: electric furnace wire muffle furnace, silicon carbide rod muffle furnace, silicon molybdenum rod muffle furnace;
According to the operating temperature, it is generally divided into: box muffle furnace below 1000 degrees, 1100 degrees to 1300 degrees muffle furnace (silicon carbide rod muffle furnace), and silicon molybdenum rod muffle furnace above 1600 degrees.
According to the controller, there are the following types: PID adjustment control muffle furnace (SCR digital display temperature controller), program control muffle furnace (computer temperature program controller);
According to the insulation materials, there are two types: ordinary refractory brick muffle furnace and ceramic fiber muffle furnace.
How to use the muffle furnace
1. When using it for the first time or reusing it after a long period of inactivity, it should be oven-baked at a temperature of 200~600℃ for about 4 hours.
2. When in use, the furnace temperature shall not exceed the maximum furnace temperature, and do not work above the rated temperature for a long time.
3. The working environment requires no flammable materials and corrosive gases.
4. To ensure safe use, a ground wire must be installed and well grounded.
5. When using, the furnace door should be lightly closed and opened to prevent damage to the parts.
6. When taking samples in the furnace, turn off the power first and handle with care to ensure safety and avoid damage to the furnace.
7. In order to prolong the service life of the product and ensure safety, samples should be taken out of the furnace in time after the equipment is used, withdraw the heating and turn off the power supply.
Precautions for installation of muffle furnace
After unpacking, check whether the muffle furnace is intact and the accessories are complete.
1. The general muffle furnace does not need special installation. It only needs to be placed flat on a solid cement table or shelf indoors, and there should be no flammable and explosive materials around. The controller should avoid vibration, and the location should not be too close to the electric furnace to prevent internal components from not working properly due to overheating.
2. Insert the thermocouple into the furnace 20-50mm, and fill the gap between the hole and the thermocouple with asbestos rope. It is better to use compensation wire (or insulated steel core wire) to connect the thermocouple to the controller. Pay attention to the positive and negative poles, and do not connect them in reverse.
3. An additional power switch needs to be installed at the lead-in 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 temperature controller to the zero point. When using the compensation wire and cold junction compensator, adjust the mechanical zero point to the reference temperature point of the cold junction compensator. Mingsheng Furnace Co., Ltd. arranges and provides it without compensation. When the wire is connected, the mechanical zero point is adjusted to the zero scale position, but the temperature indicated is the temperature difference between the measuring point and the cold junction of the thermocouple.
5. Adjust the set temperature to the required operating temperature, and then turn on the power. Turn on work, the electric furnace is powered on, and the input current, voltage, output power and real-time temperature are displayed on the control panel. As the internal temperature of the electric furnace increases, the real-time temperature will also increase. This phenomenon indicates that the system is working normally.
