What are the common faults of atmosphere tube furnace？

During long-term use, the atmosphere tube furnace may encounter some common faults that may affect the normal operation of the equipment and the accuracy of experiments or production. Here are some common faults and possible causes of atmosphere tube furnaces:
1. The indicator light is not on
Phenomenon: After all switches are turned on, the indicator light does not light up.
Possible reasons:
The fuse is blown.
The power plug is not properly plugged in or the power cord is broken.
The fuse is blown.
resolvent:
Check and replace the fuse.
Ensure that the power plug is properly plugged in and check if the power cord is intact and undamaged.
If necessary, replace the fuse.
2. Abnormal temperature
Phenomenon 1: When the tube furnace is heated up, the temperature display does not increase but instead decreases.
Possible reason: The positive and negative poles of the thermocouple are reversed.
Solution: Adjust the positive and negative wiring of the thermocouple.
Phenomenon 2: The temperature inside the furnace does not rise.
Possible reasons:
Set the temperature too low.
The heating element is damaged.
Temperature controller malfunction.
resolvent:
Adjust the set temperature to the desired value.
Replace the damaged heating element.
If the temperature controller malfunctions, it needs to be replaced.
3. The ammeter has no current, but the voltmeter has voltage
Phenomenon: The ammeter does not display current, but the voltmeter displays voltage.
Possible cause: Heating element breakage.
Solution: Open the furnace door, check and replace the broken heating element. Note that only the damaged parts need to be replaced, not all of them.
4. The device is not working
Phenomenon: The voltage and power supply are normal, but the atmosphere tube furnace is not working.
Possible reasons:
Electric furnace parameter setting error.
Other electrical faults (such as controller failure).
resolvent:
Try resetting the parameters of the electric furnace or contact a professional for inspection and adjustment.
If there is an electrical malfunction, professional personnel should be hired for inspection and repair.
5. Furnace cracking or damage
Phenomenon: Cracks or damage appear in the furnace.
Possible reasons:
The sudden opening of the furnace door under high temperature causes a thermal shock.
Aging or poor quality of furnace materials.
resolvent:
Avoid opening the furnace door directly at high temperatures to ensure slow cooling of the furnace.
If the furnace is severely damaged, a new furnace needs to be replaced.
6. Gas leakage
Phenomenon: Gas leakage was found when using the atmosphere function.
Possible reasons:
The gas pipeline connection is not tight or the sealing components are aging.
The valve is damaged or not properly closed.
resolvent:
Check if the gas pipeline connections are tight and replace the aging seals.
Ensure that the valve is in the correct position and tightly closed.
7. Overtemperature alarm
Phenomenon: The device has an over temperature alarm.
Possible reasons:
Set the temperature too high.
The malfunction of the temperature controller resulted in temperature loss of control.
resolvent:
Adjust the set temperature to a safe range.
If the temperature controller malfunctions, it is necessary to replace the temperature controller and reset the parameters.
In summary, common faults in atmosphere tube furnaces involve multiple aspects such as indicator lights, temperature, current, equipment operating status, furnace integrity, and gas management. To ensure the normal operation and prolong the service life of the equipment, users should conduct regular inspections and maintenance, and follow the correct operating procedures and safety requirements.