Common faults and handling methods of pressure transmitters

Pressure transmitter is a common industrial automation instrument mainly used for measuring and converting various pressure signals. However, due to the complexity of usage scenarios and long-term wear, pressure transmitters may also encounter some common problems. This article will introduce some common pressure transmitter faults and handling methods.

1. Zero drift

Zero drift refers to the change in the output signal of a pressure transmitter without pressure. This may be caused by temperature changes, vibration analysis, or external factors.

Take action - adjust zero point: Use an adjustment screw or digital adjuster to adjust the zero point to return the output signal to the correct zero point.

-Temperature compensation: Automatically adjust the zero point based on the current temperature.

-Replace sensor: If zero drift is too frequent or cannot be corrected, it may be necessary to replace the sensor.

2. Full scale drift

Full scale drift refers to the situation where the output signal of a pressure transmitter changes under the influence of full pressure. This may be caused by mechanical wear, material aging, or external factors.

Take measures - adjust full scale: Use adjustment screws or digital adjusters to adjust full scale to return the output signal to the correct full scale.

-Replace sensor: If the full scale drift is too frequent or cannot be corrected, it may be necessary to replace the sensor.

3. Poor linearity

Poor linearity refers to a significant nonlinear relationship between the output signal of a pressure transmitter and the input signal. This may be caused by improper sensor design or mechanical wear.

Take measures - adjust linearity: Use adjustment screws or digital regulators to adjust linearity to make the relationship between the output signal and the input signal more linear.

-Replacing the sensor: If the linearity issue is too severe or cannot be corrected, it may be necessary to replace the sensor.

4. Electrical fault

Electrical failure refers to the output signal of a pressure transmitter being affected by interference signals or other electrical issues, resulting in unstable or incorrect output signals.

Take measures - check wire connections: Check if the wire connections are secure, loose, or damaged.

-Shielded cables: The application of shielded cables can reduce the impact of interference signals.

-Replacing the power supply: If the power supply is unstable or the voltage is insufficient, the power supply must be replaced.