Clean the furnace chamber
Regular cleaning: After each use, wait for the furnace chamber to cool down to below 200℃, then use a soft-bristled brush or vacuum cleaner to remove any residues, to prevent corrosion of the furnace tubes or interference with the next experiment.
Treatment of stubborn stains: For residues left behind after the melting of alkaline substances, special cleaning agents (such as alcohol) can be used for wiping. However, it is necessary to avoid contact of corrosive substances with the inner wall of the furnace tube.
Check the status of the furnace tube
Cracks and spalling: Regularly inspect the inner wall of the furnace tube for cracks or spalling, especially for equipment that has been in use for a long time. Timely repair can prevent heat leakage and structural damage from worsening.
Tightness inspection: Ensure that the sealing strip of the furnace door is intact to prevent heat leakage or harmful gas escape (especially important when involving protective gas processes).
Heating element maintenance
Resistance measurement: Regularly measure the resistance value of heating elements (such as silicon carbide rods) and compare it with the initial value to provide early warning of aging, thus avoiding accidents caused by sudden fractures.
Wiring fastening: Check whether the power cord and thermocouple connecting wire are damaged or loose to prevent heating or short circuit caused by poor contact.
Temperature control system calibration
Thermocouple calibration: Check the displayed values of the thermocouple and temperature controller with a standard thermometer or temperature controller calibrator every quarter. If the deviation exceeds ±2℃, adjustments or replacements are necessary to ensure precise temperature control.
Signal interference elimination: The metal protective tube of the thermocouple needs to be well grounded. If necessary, use a three-wire output thermocouple to reduce measurement errors in high-temperature environments.