There are several general names for muffle furnaces in China: Maofu furnace, electric resistance furnace, electric furnace and Mafu furnace. The muffle furnace is a general-purpose heating device. It can be divided into box-type furnace-type furnaces according to the shape of the appearance. 1. In order to ensure accurate measurement, the DC potential meter is used to calibrate the temperature meter of XMT type temperature controller every year to avoid large errors. 2. The instrument should be placed in a place with dry ventilation and no corrosive gas. The working environment temperature is 10-50 °C, and the relative temperature is not more than 85%. 3. Regularly check whether the hot wire of each part is loose, the contact of the AC contactor is good, and the fault should be repaired in time. 4. The user can keep the above operating procedures. In the normal use process, if the product quality is not working properly, repair it free of charge within one year, replace the spare parts, and replace the product. However, without the quality principle of the manufacturer, the user shall not disassemble it by himself, otherwise the user shall be responsible for the maintenance costs. 5. Silicon carbon rod type furnace, after the silicon carbon rod is damaged, the new silicon carbon rod with the same specifications and similar resistance should be replaced. When replacing, first remove the protective cover and silicon carbide rod at both ends, and then take out the damaged silicon carbon rod. Since the silicon carbon rod is easy to break, be careful when installing. The outer part of the exposed shell should be equal. The chuck must be Fasten to make good contact with the silicon carbon rod. If the chuck is severely oxidized, it should be replaced. The gap at the mounting holes at both ends of the silicon carbon rod is blocked with an asbestos rope. The muffle furnace temperature must not exceed the maximum operating temperature of 1350 °C. The silicon carbon rod allows continuous operation for 4 hours at the highest temperature. After the muffle furnace has been used for a long time, if the heating power adjustment knob is adjusted clockwise to the maximum position, the heating current is still not going up. Far from the rated value, the required heating power is not reached, indicating that the silicon carbon rod has aged. At this point, the tandem silicon carbon rods can be changed to parallel and can still be used. It is not necessary to disassemble the silicon carbon rod when changing the connection method, just change the connection method, and after changing the connection method, pay attention to slowly adjust the heating power adjustment knob when using, and the heating current value must not exceed the rated value.
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