Common faults and solutions of multi temperature zone electric heating tube furnace

The common faults and solutions of multi temperature zone electric heating tube furnace are as follows:

Three commonly used gradient tube furnaces (click on the image to view product details)

Common faults
Power Problem
Phenomenon: After the tube furnace is powered on, there is no power display on the instrument.
Possible reasons: improper plug insertion, blown fuse, blown control circuit fuse.

The temperature inside the furnace does not rise
Phenomenon: The power supply and heating elements of the tube furnace are normal, but the temperature inside the furnace does not rise.
Possible reasons: Low set temperature, damaged control circuit, faulty heating element, faulty temperature controller.

Large temperature fluctuations or errors
Phenomenon: 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.

Poor airtightness
Phenomenon: The impure atmosphere inside the furnace affects the experimental results.
Possible cause: Aging or damage of the sealing ring.

Uneven heating
Phenomenon: Uneven temperature distribution inside the furnace.
Possible reasons: Improper layout of furnace tubes, failure of heating elements.

Oxidation or pollution
Phenomenon: Oxidation or contamination of experimental samples.
Possible reason: Insufficient flow of protective gas inside the furnace.

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.

Main circuit malfunction
Phenomenon: The tube furnace instrument is outputting normally, but the OUT indicator light is not flashing.
Possible reasons: Main circuit malfunction, such as open circuit of heating resistor wire and damage to thyristor.

Abnormal over temperature alarm
Phenomenon: The tube furnace has an over temperature alarm.
Possible reasons: Low temperature setting and faulty temperature controller.

Solution
Power Problem
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.

The temperature inside the furnace does not rise
Solution: Adjust the set temperature and notify professional maintenance personnel to repair the control circuit or replace the heating element and temperature controller.

Large temperature fluctuations or errors
Solution: Replace the temperature sensor or thermostat and position it correctly.

Poor airtightness
Solution: Check the sealing area and replace the sealing material if necessary to ensure good air tightness of the tube furnace.

Uneven heating
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.

Oxidation or pollution
Solution: Check the gas flow meter and pipeline, confirm that the gas supply is normal, and adjust the flow rate appropriately.

Furnace tube damage
Solution: Regularly check the condition of the furnace tube, and replace it immediately if cracks or deformations are found to prevent safety hazards.

Main circuit malfunction
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.

Abnormal over temperature alarm
Solution: Adjust the set temperature and replace the temperature controller.

Multi temperature zone rotary tube furnace that can be used to process powder materials (click on the image to view product details)

During the use of a tube furnace, you may encounter various problems. If you encounter unsolvable problems, you can check the nameplate on the back of the electric furnace, consult the original manufacturer, and there will be specialized technicians to help you solve the problem!Click to learn more tube furnaces! Or click on online customer service to learn more about product information!