Muffle furnace maintenance and precautions

Compared with other equipment, the muffle furnace has a wide range of applications, that is, weight analysis can also be used for organic matter and coal ash determination. In addition, the muffle furnace can also accelerate the temperature rise and heat evenly. And its daily maintenance also has its own set of methods:

1. When the muffle is used for the first time or after it has been decommissioned for a long period of time, the oven must be performed. The oven time should be room temperature 200 °C for four hours. 200°C to 600°C for four hours. When using, the maximum furnace temperature must not exceed the rated temperature, so as not to burn the heating element. It is forbidden to inject various liquids and easily dissolved metals into the furnace. The muffle furnace is best to operate below the maximum temperature of 50°C. At this time, the furnace wire has a long life.

2. The muffle and controller must work in places where the relative humidity does not exceed 85% and there is no conductive dust, explosive gas or corrosive gas. Where metal materials such as grease are to be heated, a large amount of volatile gases will affect and corrode the surface of the heating element to destroy it and shorten its life. Therefore, heat should be promptly prevented and sealed container or appropriate openings to be eliminated.

3, muffle controller should be limited to use in the ambient temperature range of 0-40 °C.

4, according to technical requirements, regularly check the electric furnace, the controller of the wiring connection is good, whether the pointer pointer stuck movement phenomenon, and use the potentiometer to calibrate the instrument due to magnetic steel, demagnetization, wire, shrapnel The increase in error due to fatigue, balance failure, etc.

5, thermocouple not suddenly pulled out at high temperatures to prevent the coat burst.

6, often keep the furnace clean, timely removal of the furnace oxides and the like.