Common Troubleshooting Methods for Tube-Type Electric Furnaces
2024-05-06
Tube Furnace It is a product used for testing and inspection in fields such as refractory materials, electronics, ceramics, metallurgy, machinery, building materials, specialty materials, and new-material development.
Operating principle: The thermocouple converts the furnace temperature into a voltage signal, which is then applied to the microcomputer-based temperature control regulator. The regulator compares this signal with the programmed setpoint and outputs an adjustable control signal. This adjustable signal subsequently controls the trigger circuit, which in turn triggers the voltage regulator, thereby regulating the furnace voltage and, consequently, the furnace temperature.
When a tubular electric furnace malfunctions, how do you handle it? Gaining some relevant knowledge can often help you resolve the issue in the shortest possible time. Below are several common fault scenarios and their corresponding troubleshooting methods:
1. No power display on the instrument:
Causes of the fault: power supply not connected, power cable failure, internal fuse blown.
Troubleshooting steps: Check the power outlet, power switch, and power cord for proper operation, and verify that power is being supplied. If the issue is with the fuse, disconnect the power, inspect the fuse, and replace it with a suitable one.
2. Furnace temperature does not rise:
Causes of the fault: damaged heating element, malfunctioning temperature controller, or abnormal power supply.
Troubleshooting steps: Verify that the heating element is intact; if damaged, replace it. Check the temperature controller’s settings and output status, and repair or replace the controller as necessary. Confirm that the supply voltage is stable and meets the equipment’s requirements.
3. Set temperature does not match the furnace temperature:
Causes of the fault: incorrect thermocouple wiring, sensor failure, or inaccurate temperature control system.
Troubleshooting steps: Verify that the thermocouple’s positive and negative leads are connected correctly; if reversed, correct the wiring. If the thermocouple or sensor has failed, replace it with a new one. If the temperature controller itself is malfunctioning, it must be calibrated or replaced.
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