Pressure sensors/transmitters may encounter certain issues during use, but some problems do not require factory repair and can be resolved on their own. Here are a few examples that can be solved on your own.
1. When the pressure rises, the transmitter's output cannot go up either
In the face of this situation, the first thing to check is whether the pressure interface is leaking or blocked. If it is confirmed that it is not, check the wiring method and power supply. If the power supply is normal, perform a simple pressurization to see if the output changes, or check if the sensor zero position has output. If there is no change, the sensor is damaged, which may be due to instrument damage or other issues in the entire system.
2. The output of the pressure transmitter does not change, and if the output of the pressure transmitter suddenly changes again, the zero position of the pressure relief transmitter cannot return
This situation is likely to be a problem with the pressure sensor sealing ring. It is common that due to the specifications of the sealing ring, after tightening the sensor, the sealing ring is compressed into the sensor pressure port and blocks the sensor. When pressurized, the pressure medium cannot enter, but when the pressure is high, the sealing ring suddenly opens, causing the pressure sensor to change under pressure. The method to eliminate this fault is to remove the sensor and directly check whether the zero position is normal. If the zero position is normal, replace the sealing ring and try again.
3. Unstable output signal of pressure transmitter
This kind of malfunction may be a problem with the pressure source. The pressure source itself is an unstable pressure, which is likely due to weak resistance of the instrument or pressure sensor, severe vibration of the sensor itself, and sensor failure.
4. The comparison deviation between the transmitter and the pointer pressure gauge is large
The deviation of the pressure transmitter is a normal phenomenon, and confirming the normal deviation range is sufficient.
5. The influence of installation position of micro differential pressure transmitter on zero position output
Due to its small measurement range, the sensing elements in the micro differential pressure transmitter can affect its output. During installation, the axial direction of the pressure sensitive part of the transmitter shall be perpendicular to the gravity direction. After installation and fixation, adjust the zero position of the transmitter to the standard value.
The above summarizes five types of pressure sensor/transmitter faults and their corresponding solutions. In the future, if there are problems, you can compare them to see which situation they belong to and take corresponding measures.