Common faults and solutions of customized experimental tube furnace

The common faults and solutions for customized experimental 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 plugged in or connected properly; Replace the fuse; Check for short circuits, eliminate them, and 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, insufficient power supply voltage, open circuit of heating element, poorly closed electric furnace door or poor sealing.
Solution: Adjust the set temperature; Notify professional maintenance personnel to inspect and control the circuit; Check the power supply voltage; Replace the heating element with the same model; Ensure that the furnace door is tightly closed and the sealing is intact.

3. The set temperature does not match the temperature inside the furnace, resulting in a positive or negative deviation
Possible reasons: Damage to temperature sensors or temperature controllers, deviation between temperature measurement points and layout points.
Solution: Replace the temperature sensor or thermostat; Set the layout position correctly.

4. The instrument output is normal, and 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, replace the resistance wire or temperature controller.

5.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.After using for a period of time, it was found that the vacuum degree decreased when vacuuming
Possible reasons: Aging or damage of temperature resistant silicone rings between stainless steel flanges, vacuum system failure.
Solution: Replace the heat-resistant silicone ring or reinstall the stainless steel flange; Replace or repair the vacuum system.

8. Uneven distribution of furnace temperature leads to abnormal temperature display
Possible reasons: There may be dirt inside the furnace or uneven distribution of heating elements.
Solution: Clean the tube furnace and remove the dirt inside the furnace; Check the distribution of heating elements and make adjustments if necessary.

9. Tube furnace cannot be started or temperature display is abnormal
Possible reasons: unstable or malfunctioning power supply, controller malfunction or failure.
Solution: Check if the power plug is plugged in properly and if the power cord is damaged; Use a voltmeter to check if the power supply voltage is stable. If it is unstable, replace it with a stable power supply in a timely manner; Use a multimeter to test the controller and confirm if there is a malfunction. If the controller is damaged, it should be replaced promptly.

10. Severe temperature loss in the furnace and abnormal temperature display
Possible cause: Damaged or improperly installed furnace door seals.
Solution: Check if the furnace door seal is damaged. If it is damaged, replace it with a new seal in a timely manner; Ensure that the furnace door is correctly installed and tightly closed.

11.After using for a period of time, the electrical connection part of the temperature control system has poor contact
Possible cause: Loose or poor contact at the connection points of the heating element.
Solution: Regularly check whether the electrical connection part of the temperature control system has good contact, especially paying attention to whether the connection points of the heating elements are tightened. If there is any looseness or poor contact, it should be dealt with in a timely manner.