1、 Electrical malfunction

1. Abnormal signal output
   • Fault phenomenonUnstable output signal, no signal output, or abnormal signal amplitude.
   • Possible reasons：
     • The sensor cable is damaged or has poor contact, resulting in signal transmission interruption.
     • Internal circuit failure of the sensor, such as damage to the ICP module.
     • The power supply voltage is unstable or does not meet the requirements of the sensor (usually 18-30V DC).
   • solution：
     • Check cable connections and replace damaged cables.
     • Use a multimeter to test the sensor supply voltage and output signal to confirm if they are within the normal range.
     • If there is an internal circuit malfunction, it is necessary to return to the factory for repair or replace the sensor.
2. noise interference
   • Fault phenomenonThere is high-frequency noise or interference in the output signal.
   • Possible reasons：
     • Poor grounding of the sensor leads to electromagnetic interference.
     • Excessive ripple in the power supply affects signal quality.
     • The signal line and power line are not routed separately, resulting in coupling interference.
   • solution：
     • Ensure that the sensor is well grounded to reduce electromagnetic interference.
     • Use a low ripple power supply or add a filtering circuit.
     • Separate the wiring of signal lines and power lines to avoid parallel routing.

2、 Mechanical malfunction

1. Decreased sensitivity
   • Fault phenomenonThe response of the sensor to the same force weakens, and the output signal amplitude decreases.
   • Possible reasons：
     • Long term overload use of sensors can cause fatigue or damage to piezoelectric components.
     • Improper installation of sensors, such as uneven installation surfaces or excessive fastening force.
     • The internal structure of the sensor is loose, affecting sensitivity.
   • solution：
     • Avoid long-term overload use of sensors and ensure that the measurement range is within the sensor range.
     • Reinstall the sensor, ensuring that the installation surface is flat and the fastening force is moderate.
     • Check the internal structure of the sensor and return it to the factory for repair if necessary.
2. zero drift
   • Fault phenomenonThe sensor outputs a non-zero signal without external force.
   • Possible reasons：
     • The temperature change of the sensor leads to changes in the characteristics of the piezoelectric element.
     • The internal circuit of the sensor is aging, resulting in zero offset.
     • The sensor is subjected to mechanical impact, causing internal structural changes.
   • solution：
     • Use sensors in a constant temperature environment or perform temperature compensation.
     • Regularly calibrate sensors and adjust zero offset.
     • Avoid mechanical impact on the sensor and ensure a stable usage environment.

3、 Malfunctions caused by environmental factors

1. humidity effect
   • Fault phenomenonThe sensor outputs unstable or malfunctioning signals in humid environments.
   • Possible reasons：
     • Poor sealing of the sensor allows moisture to enter the interior, leading to circuit short circuits or damage to piezoelectric components.
   • solution：
     • Ensure that the sensor is well sealed and avoid use in humid environments.
     • If the sensor has become damp, it needs to be returned to the factory for repair or replacement.
2. Corrosive gas
   • Fault phenomenonThe performance of the sensor decreases or is damaged in corrosive gas environments.
   • Possible reasons：
     • Corrosive gases corrode the sensor housing or internal circuitry, causing damage.
   • solution：
     • Avoid using sensors in corrosive gas environments, or choose sensors made of corrosion-resistant materials.
     • Regularly inspect the sensor housing to ensure there are no signs of corrosion.

4、 Calibration and Calibration Issues

1. Calibration failure
   • Fault phenomenonAfter sensor calibration, the output signal still does not meet expectations.
   • Possible reasons：
     • Inaccurate calibration equipment leads to unreliable calibration results.
     • The unstable environmental conditions (such as temperature and humidity) during the calibration process affect the calibration accuracy.
   • solution：
     • Use high-precision calibration equipment to ensure accurate calibration results.
     • Calibrate under stable environmental conditions to avoid interference from environmental factors.
2. Deviation of calibration curve
   • Fault phenomenonThe sensor output signal does not match the calibration curve.
   • Possible reasons：
     • After long-term use, the performance of the sensor changes, causing the calibration curve to deviate.
     • Improper operation during the calibration process resulted in inaccurate calibration results.
   • solution：
     • Regularly recalibrate sensors to ensure accurate calibration curves.
     • During the calibration process, strictly follow the operating procedures to avoid human errors.

5、 Improper use and maintenance

1. Overloaded use
   • Fault phenomenonThe sensor is damaged under force exceeding the range.
   • Possible reasons：
     • The user did not understand the sensor range, resulting in overload use.
   • solution：
     • Before use, carefully read the sensor manual to understand the range.
     • During the measurement process, ensure that the external force does not exceed the sensor range.
2. Improper maintenance
   • Fault phenomenonSensors may experience performance degradation or damage due to long-term lack of maintenance.
   • Possible reasons：
     • The accumulation of dust, oil stains, etc. on the surface of the sensor affects the measurement accuracy.
     • The sensor cable is aging and damaged, resulting in signal transmission interruption.
   • solution：
     • Regularly clean the surface of the sensor to maintain its cleanliness.
     • Regularly inspect sensor cables and replace aging or damaged cables.