Common faults of multi temperature zone rotating electric furnace used in experiments

Common faults of multi temperature zone rotating electric furnaces used in experiments include power supply issues, abnormal temperature control, damaged heating elements, poor airtightness, uneven heating, oxidation or contamination, furnace tube damage, main circuit faults, etc. The following are specific introductions:

1. Power supply issue:
Phenomenon: After the electric furnace is powered on, there is no power display on the instrument.
Possible reasons: improper plug insertion, blown fuse, blown control circuit fuse.
Solution: Check if the plug is plugged in or connected properly, replace the fuse, check for short circuits and eliminate them before replacing the fuse.

2. Abnormal temperature control:
Phenomenon: The set temperature does not match the temperature inside the furnace, resulting in a positive or negative deviation; The temperature does not rise or rises slowly; The temperature fluctuates greatly.
Possible reasons: damage to temperature sensors or temperature controllers, deviation between temperature measurement points and layout points, damage or aging of heating elements, and control system issues.
Solution: Replace the temperature sensor or temperature controller and position it correctly for layout; Check the heating element and replace it if necessary; Check the control system, including controller and PID parameter settings, to ensure normal operation.

3. Damaged heating element:
Phenomenon: The electric furnace power supply is normal, but the temperature inside the furnace does not rise or rises slowly.
Possible reasons: Heating element fracture, oxidation, or ablation.
Solution: Check the heating element and replace it with a new heating material if necessary.

4. Poor airtightness:
Phenomenon: The impure atmosphere inside the furnace affects the experimental results.
Possible cause: Aging or damage of the sealing ring.
Solution: Check the sealing area and replace the sealing material if necessary to ensure good airtightness of the electric furnace.

5. Uneven heating:
Phenomenon: Uneven temperature distribution inside the furnace.
Possible reasons: Improper layout of furnace tubes, failure of heating elements.
Solution: Check the integrity of the heating element and replace it if any damage is found; Meanwhile, adjust the placement of the sample to ensure even heating.

6. Oxidation or pollution:
Phenomenon: Oxidation or contamination of experimental samples.
Possible reason: Insufficient flow of protective gas inside the furnace.
Solution: Check the gas flow meter and pipeline, confirm that the gas supply is normal, and adjust the flow rate appropriately.

7. Furnace tube damage:
Phenomenon: Cracks or deformations appear in the furnace tube.
Possible reason: Prolonged use at high temperatures may cause the furnace tube to rupture or age.
Solution: Regularly check the condition of the furnace tube, and replace it immediately if cracks or deformations are found to prevent safety hazards.

8. Main circuit failure:
Phenomenon: The electric furnace instrument is outputting normally, but the OUT indicator light is not flashing.
Possible reasons: Open circuit of heating resistor wire, damage to thyristor.
Solution: If there is heating, check and replace the indicator light; If there is no heating, check whether the heating resistor wire is open circuited; If there is no heating, check whether the thyristor is damaged.