Muffle furnace (high temperature furnace) installation and use:
1. After opening the package, check if the muffle furnace is intact and the accessories are complete. A typical muffle furnace does not require special installation and needs to be placed flat on a flat floor or shelf. The controller should avoid vibration, and the position should not be too close to the electric furnace to prevent the internal components from 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. Connect the thermocouple to the controller zui to use the compensation wire (or use insulated steel core wire), pay attention to the positive and negative poles, do not reverse.
3. An additional power switch is required at the power line lead to control the main power supply. In order to ensure safe operation, the electric furnace and the controller must be reliably grounded.
4. Adjust the thermometer indicator to zero before use. When using the compensation wire and cold end compensator, adjust the mechanical zero point to the reference temperature point of the cold end compensator. When the compensation wire is not used, the mechanical zero point is used. Adjusted to zero scale, but the temperature indicated is the temperature difference between the measurement point and the cold junction of the thermocouple.
5. After checking the wiring and confirming it is correct, cover the controller casing. Adjust the temperature indicator's setting pointer to the desired operating temperature and then turn on the power. Turn on the power switch. At this time, the green light on the meter indicates that the relay is on, the relay starts to work, the electric furnace is energized, and the current meter displays current. As the internal temperature of the electric furnace rises, the temperature indicating instrument pointer also gradually rises. This phenomenon indicates that the system is working normally. The heating and constant temperature of the electric furnace are respectively indicated by the traffic light 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 muffle furnace is used once or used for a long time, it must be oven-dried. The oven should be at room temperature to 200 ° C for four hours. 200 ° C to 600 ° C for four hours. When using, the furnace temperature must not exceed the rated temperature, so as not to burn the electric components. It is forbidden to infuse the furnace with various liquids and easily soluble metals. The muffle furnace is better than 50°C below the high temperature of zui, and the furnace has a long life.
2. The muffle furnace and controller must work in a location where the relative temperature does not exceed 85% and there is no conductive dust, explosive gas or corrosive gas. When a metal material such as grease is required to be heated, a large amount of volatile gas will affect and corrode the surface of the electric heating component, causing damage and shortening the life. Therefore, when heating, it should be prevented and sealed in a timely manner or properly opened to eliminate.
3. The muffle controller should be limited to use in the ambient temperature range of 0-40 °C.
4. According to the technical requirements, regularly check whether the wiring of each electric furnace and controller is good, whether there is any stuck stuck phenomenon when the pointer of the indicator moves, and use the potentiometer to check the instrument due to magnetic steel, demagnetization, wire, and shrapnel. The increase in error caused by fatigue, balance damage, and the like.
5. Do not pull out the thermocouple at high temperatures to prevent the jacket from bursting.
6. Always keep the furnace clean and remove impurities such as oxides in the furnace.
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