Temperature transmitter failures mainly stem from five categories: power supply, sensor, wiring, parameter settings, and environmental interference. Prioritize checking the power supply and sensor, then verify the wiring and parameters, and finally consider the environment and equipment aging. Prioritizing these issues can quickly resolve more than 80% of problems.
I. No Output Signal
1. Power Supply Failure
2. Sensor Failure (Thermocouple/RTD Damage)
II. Inaccurate Output Signal (Large Deviation)
3. Improper Sensor Selection/Installation
4. Incorrect Transmitter Parameter Settings
5. Calibration Drift (After Long-Term Use)
III. Large Output Signal Fluctuations (Unstable)
6. Temperature Fluctuations in the Measured Medium/Operating Interference
7. Loose Wiring/Poor Contact
IV. Output Signal Saturation
8. Sensor Overload Damage
9. Transmitter Internal Circuit Failure
V. Failures Caused by Other Environmental Factors
10. Harsh Environmental Conditions
Industrial Scenarios Troubleshooting Priority:
1. Check Power Supply (Measure Voltage with Multimeter) →
2. Check Sensor Continuity/Resistance →
3. Check Wiring Secureness/Polarity →
4. Check Transmitter Parameter Settings →
5. Check Installation Location/Environmental Interference →
6. Calibrate or Replace Equipment.
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