The daily maintenance of laboratory resistance furnaces is crucial to ensure their normal operation, extend their service life, and improve the accuracy of experimental results. Here are some detailed maintenance steps and suggestions:
1. External cleaning
After each use, wait for the furnace to cool down and wipe the outside of the furnace with a clean damp cloth to remove dust and stains.
Keep the furnace and its instruments, control box, etc. clean inside and outside, regularly use a vacuum cleaner or soft bristled brush to clean the debris and dust inside the furnace, and avoid scratching the furnace with hard objects.
2. Heating element inspection
Regularly check whether the connection of the heating element is loose, and whether there is any damage, oxidation or deformation on the surface.
If the heating element is found to be damaged, it should be replaced in a timely manner to ensure normal heating and temperature uniformity.
3. Temperature controller calibration
According to the equipment manual, regularly calibrate the temperature controller to ensure the accuracy of temperature display and control.
Regularly check if the temperature automatic control system is functioning properly to prevent the furnace lining from being burned out due to temperature runaway.
4. Sealing and insulation inspection
Check the sealing of the furnace door to ensure good sealing and prevent heat loss and external air from entering.
Check whether the insulation material is damaged or detached, and if so, repair or replace it in a timely manner to maintain good insulation performance.
5. Electrical connection inspection
Regularly check whether the electrical connections such as power lines and control lines are secure, and whether there are any damages, aging, or other phenomena.
Check the tightening of the wiring clamp bolts and pay attention to whether the plug of the lead out rod and thermocouple is tight.
6. Ventilation and heat dissipation
Ensure that there is a good ventilation environment around the resistance furnace and that the air vents are not blocked by debris to facilitate heat dissipation.
Avoid placing flammable and explosive materials around the resistance furnace to ensure safety.
7. Sample processing
When placing and removing samples, specialized tools should be used to avoid colliding with the furnace and heating elements.
It is prohibited to directly load damp workpieces into the furnace to prevent damage to the resistance furnace and safety accidents.
8. Regular trial operation
Even during periods of non use, regular short-term trial runs should be conducted to check if the equipment is functioning properly.
Regularly inspect the furnace lining and roof for cracks and collapses, check if the bricks are broken, and check if the electric heating elements are deformed. If any problems are found, they should be repaired as soon as possible.
9. Operating procedures
Strictly follow the operation manual to avoid equipment damage caused by unauthorized operations.
It is prohibited to pour various liquids and easily soluble metals into the furnace to prevent damage to the electric heating elements and furnace lining.
10. Maintain records
Establish maintenance records, recording the time, content, identified issues, and solutions for each maintenance.
Easy to track the maintenance history and condition of the equipment, providing reference for subsequent maintenance and upkeep.
In summary, the daily maintenance of laboratory resistance furnaces involves multiple aspects, including external cleaning, heating element inspection, temperature controller calibration, sealing and insulation inspection, electrical connection inspection, ventilation and heat dissipation, sample processing, regular trial operation, operating procedures, and maintenance records. Regular maintenance and upkeep can ensure the normal operation of the resistance furnace, extend its service life, and improve the accuracy of experimental results.