Tube type electric furnaces may encounter various problems during use. Let's take a detailed look at the common faults and solutions of tube type electric furnaces below!

Timely resolution of problems is necessary to ensure the efficiency of experiments or production

1. Power supply and heating issues
After the tube furnace is powered on, there is no power display on the instrument
Possible reason: The plug is not properly inserted; The fuse is blown; The fuse of the control circuit is blown.
Solution: Check if the plug is plugged in or connected properly; Replace the fuse; Check for short circuits, eliminate them, and replace the fuse.

The power supply and heating elements of the tube furnace are normal, but the temperature inside the furnace does not rise
Possible reason: The set temperature is relatively low; Control circuit damage; Insufficient power supply voltage; Heating element open circuit; The electric furnace door is not closed properly or the sealing is poor.
Solution: Adjust the set temperature; Notify professional maintenance personnel to conduct maintenance; 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.

Slow heating rate
Possible reasons: Some heating elements are disconnected; The voltage drop of the power supply line is too large or the socket and control switch have poor contact; Three phase power supply is missing phase.
Solution: Use a multimeter to check and replace heating elements with the same specifications; Check the power supply line and ask an electrician for maintenance if necessary.

2. Temperature control issues
The set temperature does not match the temperature inside the furnace, resulting in a positive or negative deviation
Possible reasons: Damage to temperature sensor or temperature controller; There is a deviation between the temperature measurement point and the layout point.
Solution: Replace the temperature sensor or thermostat; Set the layout position correctly.

The furnace body exceeds the upper limit temperature, and the instrument is activated for protection
Solution: After the temperature drops to a safe level, the instrument will automatically return to normal. At the same time, check and adjust the temperature setting of the furnace body to avoid exceeding the upper limit again.

3. Vacuum degree issue
Possible problem: After using for a period of time, it is found that the vacuum degree decreases when vacuuming. Solution: Replace the heat-resistant silicone ring between the stainless steel flanges or reinstall the stainless steel flanges; Or replace and repair the vacuum system to improve the overall vacuum level of the tube furnace system.

4. Other common questions
Furnace cracking
Possible reason: Failure to preheat after first use or prolonged disuse.
Solution: After the first use or long-term disuse, heat the tube furnace to around 120 ℃ and bake for 1 hour, then heat it to around 300 ℃ and bake for 2 hours before use. Meanwhile, try not to exceed the rated temperature for use.

Quartz tube loss of transparency
Possible reason: When the temperature exceeds 1000 ℃, some high-temperature parts of the quartz tube may exhibit opacity (loss of transparency), which is an inherent defect of fused quartz tubes.
Solution: This phenomenon is normal and does not require special treatment. However, it is important to avoid prolonged use at high temperatures to extend the lifespan of the quartz tube.

Electrical connection issues
Possible reasons: Poor contact in the electrical connection part of the temperature control system or loose connection points in the heating element.
Solution: Regularly check whether the electrical connection part of the temperature control system is in good contact, and pay special attention to whether the connection points of the heating elements are tightened. If there is any looseness or poor contact, promptly handle it.

Regular maintenance of the tubular electric furnace is necessary to extend its lifespan

In general, tubular electric furnaces may encounter various problems during use, but as long as the correct solutions and maintenance skills are mastered, these problems can be effectively avoided and solved. At the same time, in order to ensure the safe operation and prolong the service life of the tubular electric furnace, it is recommended that users perform regular maintenance and upkeep work.Click to learn more tube furnaces! Or click on online customer service to learn more about product information!