Introduction

Tube furnaces are widely used in laboratories and industries for precise thermal treatments. However, users may encounter anomalies in temperature displays during operation. This article explores common causes of these issues and provides effective troubleshooting methods.

1. Temperature Display Decreasing During Heating

An unusual scenario is when the temperature display decreases instead of increasing during the heating process.

Cause: This issue often arises from reversed connections of the thermocouple's positive and negative leads.

Solution: Verify and correct the polarity of the thermocouple connections to ensure accurate temperature readings.

2. Inaccurate Temperature Readings Due to Thermocouple Issues

Faulty or improperly installed thermocouples can lead to significant discrepancies in temperature measurements.

Solution: Regularly inspect thermocouples for signs of wear or damage. Ensure they are securely and correctly positioned within the furnace.3. Influence of Environmental Factors on Temperature Measurement

External environmental factors, such as ambient temperature fluctuations, can affect the accuracy of temperature measurements.

Solution: Maintain a stable environment around the furnace and consider implementing shielding or insulation to minimize external influences.

4. Calibration Drift Over Time

Over prolonged use, calibration drift can occur, leading to inaccurate temperature readings.

Solution: Implement a regular calibration schedule to ensure the furnace maintains accurate temperature control.

Conclusion

By understanding and addressing these common issues, users can ensure the reliable operation of tube furnaces, leading to accurate and consistent thermal processing results.