Common faults and troubleshooting methods of laboratory rotary tube furnace

　　The common faults and troubleshooting methods of laboratory rotary tube furnaces are as follows: 1. After power on, there is no power display on the instrument panel Possible reasons: improper plug insertion, blown fuse, blown control circuit fuse. Solution: Check if the plug is properly inserted or connected, replace the fuse, check and eliminate the short circuit, and then replace the fuse. 2. The power supply and heating elements are normal, but the temperature inside the furnace does not rise Possible reasons: Low set temperature, damaged control circuit. Solution: Adjust the set temperature and notify professional maintenance personnel to repair the control circuit. 3. The set temperature does not match the temperature inside the furnace Possible reasons: Damage to temperature sensors or temperature controllers, deviation between temperature measurement points and layout points. Solution: Replace the temperature sensor or temperature controller and position it correctly to ensure accurate temperature measurement. 4. The instrument output is normal, but the OUT indicator light is not flashing Possible cause: The main circuit has malfunctioned. Solution: Check if the resistance wire is short circuited, if the heating element is controllable, and replace the resistance wire or temperature controller if necessary. During the heating process, the temperature does not rise but instead decreases Possible reason: The positive and negative poles of the thermocouple are reversed. Solution: Replace the thermocouple connector. 6. The ammeter has no current, but the voltmeter has voltage Possible cause: Heating element breakage. Solution: Replace the broken heating element according to the instructions. 7. The voltage and power supply are normal, but the equipment is not working Possible cause: Incorrect parameter settings for the rotary furnace. Solution: Notify the manufacturer to set the correct parameters. 8. Damaged or improperly installed furnace door seals Possible cause: Damage or improper installation of the furnace door seal, resulting in severe temperature loss inside the furnace and abnormal temperature display. Solution: Check if the furnace door seal is damaged. If it is damaged, replace it with a new seal in a timely manner and ensure that the furnace door is installed correctly and tightly closed.