Correct installation and use of muffle furnace

1. After opening the package, check whether the muffle furnace is intact and whether the accessories are complete. The general muffle furnace does not need special installation, it only needs to be placed on the flat indoor floor or shelf. The controller should avoid vibration and should not be placed too close to the furnace to prevent the internal components from working normally due to overheating.

2. A thermocouple is inserted into the furnace for 20-50mm, and the gap between the hole and thermocouple is filled with asbestos rope. The best way to connect the thermocouple to the control is to use compensation wire (or insulated steel core wire), pay attention to the positive and negative poles, and do not connect them in reverse.

3. Additional power switch should be installed at the leading in of power line to control the main power supply. In order to ensure safe operation, the furnace and controller must be reliably grounded.

4. Before use, the thermometer indicator should be adjusted to zero point. When using compensation lead and cold junction compensator, the mechanical zero point should be adjusted to the reference temperature point of the cold junction compensator. If the compensation lead wire is not used, the mechanical zero point should be adjusted to the zero scale position, but the temperature indicated is the temperature difference between the measuring point and the cold end of the thermocouple.

5. After checking the wiring, cover the controller shell. Adjust the setting pointer of the temperature indicator to the required working temperature, and then turn on the power supply. Turn on the power switch, at this time, the green light on the temperature indicator is on, the relay starts to work, the furnace is powered on, and the ammeter shows the current. With the increase of the internal temperature of the electric furnace, the pointer of the temperature indicating instrument gradually rises, which indicates that the system works normally. The temperature rise and constant temperature of the electric furnace are indicated by the traffic light of the temperature indicator. The green light indicates the temperature rise, and the red light indicates the constant temperature.