What are the precautions for using the muffle furnace
The muffle furnace can be used for chemical analysis, physical determination and heating of small steel parts in the heat treatment of small steel parts in laboratories of industrial and mining enterprises, scientific research and other units. There are a few points to pay special attention to when using:
When the muffle furnace is used or used again after a long period of inactivity, it is necessary to carry out the oven. The oven should be at room temperature 200°C for four hours. Four hours from 200°C to 600°C. When in use, the furnace temperature must not exceed the extra temperature to avoid burning electric heating elements. Stop pouring various liquids and easily soluble metals into the furnace. The furnace is operated at a temperature below 50 ℃, and the furnace wire has a longer life.
It is necessary for the muffle furnace and controller to operate in a place where the relative humidity does not exceed 85%, and there is no conductive dust, explosive gas or corrosive gas. When metal materials with grease or the like need to be heated, a lot of volatile gases will affect and corrode the appearance of the electric heating element, destroying it and shortening its life. Therefore, the heating should be prevented in time and the container should be sealed or properly opened and cleaned.
The muffle furnace controller should be limited to the ambient temperature range of 0-40 ℃. Do not pull out the thermocouple suddenly at high temperature to prevent the jacket from cracking.
According to skill requests, regularly check whether the wiring of the high-temperature muffle furnace controller is excellent, whether the pointer of the indicator is stuck and staying when moving, and use a potentiometer to correct the appearance of magnets, demagnetization, wire expansion, and shrapnel Increased errors caused by fatigue, balance damage, etc. Frequently insist on cleaning the muffle furnace hearth to remove oxides and other things in the furnace in time.