What are the common troubleshooting steps for Armored Heaters?

Common Troubleshooting Steps for Armored Heaters

1. Visual Inspection and Fixing Status

Visually inspect the surface of the armored tube for cracks, corrosion, deformation, or loose fasteners; confirm that the heater is in tight contact with the heated object.

2. Electrical Continuity and Insulation Resistance Test

Use a multimeter to measure the resistance value of the heating element and check if it is within the design range; then perform an insulation resistance test (≥1000MΩ·m) to ensure there is no leakage between the armor layer and the outer conductor.

3. Heating Performance Verification

Apply the rated voltage and measure the actual power and temperature rise curve; if the power is low or the temperature rise is insufficient, it may be due to a broken core wire, poor contact, or damaged sheath thermal resistance.

4. Temperature Control System and Sensor Calibration

Check the setpoint, output signal, and response of the temperature controller and temperature sensor (thermocouple/thermal resistance); replace or recalibrate the sensor if necessary to troubleshoot control loop faults. The above four steps constitute a systematic troubleshooting process for armored heater malfunctions, enabling rapid identification of electrical, mechanical, or control-level anomalies.