How to maintain and repair the box muffle furnace:
1. Materials and protective layers that are never eroded are non-existent. Therefore, the materials and protective layers used on the instrument must be considered, and the degree of erosion allowed when subjected to erosion. For the detection instrument, if the steel beam on the cylindrical compression method can corrode, it will affect the elastic limit, thus affecting the accuracy of the determination of the plasticity index.
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. In order to protect the accuracy of the instrument, the instrument should be protected as far as possible without using isolator or other isolation device.
4. Solve the protection problem of the instrument. It also requires good protection performance. It can be started from three aspects: selection of protective materials, adoption of protective layer process measures and improvement of instrument structure.
5. Regularly check whether the parts are loose, the contacts of the AC contactor are good, and the fault should be repaired in time.
6. In order to ensure accurate measurement, the DC potential meter is used to check the temperature meter of the XMT type temperature controller every year to avoid large errors.
After the box-type muffle furnace Note <br> <br> furnace type silicon carbide, silicon carbide found damaged, the resistance value but opposite change specifications similar new silicon carbide. When changing, first remove the maintenance 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, the device should be careful, the inner part of the exposed shell should be equal, and 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 by an asbestos rope. The muffle furnace temperature must not exceed the Zui high working temperature of 1350 °C. The silicon-carbon V-type mixer rod allows for four hours of continuous task at low temperatures. After the electric furnace has been used for a long time, if the heating power conditioning knob is adjusted in a clockwise direction to the large position, the heating current is still not going up. The small size labeling machine has a far extra value and does not reach the required heating power, explaining 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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