When using a box type resistance furnace for the first time or reusing it after long-term shutdown, it is necessary to dry the furnace in advance, otherwise it may easily cause furnace cracking.

When using a box type resistance furnace, the furnace temperature should not exceed the rated temperature to avoid damaging the heating elements. It is prohibited to inject various flammable liquids and molten metals into the furnace.

3. The items inside the box should not be placed too tightly, and space must be left to facilitate air circulation.

4. After use, open the box door and wait for the temperature inside to completely cool before removing the item.

5. If the box type resistance furnace is not used for a long time, it should be covered with a dust cover and placed in a dry space to keep the instrument clean.