Common faults and troubleshooting of 3051 pressure transmitter
3051 pressure transmitter
3051 pressure transmitter
3051 pressure transmitter is widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, power, ships, machine tools, pipelines and many other industries. Here is a brief introduction to some common faults and troubleshooting methods of commonly used transmitters.
Common faults and troubleshooting of pressure transmitters
1. When the pressure is increased, the transmitter output does not change without increasing the pressure. When the pressure is increased, the transmitter output suddenly changes, and the zero position of the pressure relief transmitter cannot return.
In this situation, it is necessary to check whether the pressure interface is leaking or blocked. After checking the wiring method and power supply, if it is normal, check whether the sensor zero position has an output, or simply pressurize to see if the output changes. If there is a change, it indicates that the sensor is not damaged. If there is no change, the sensor is already damaged. Finally, we are considering the possibility of instrument damage or other issues with the entire system.
2. 3051 pressure transmitter output signal unstable
When this situation occurs, it should be considered that the pressure source itself is an unstable pressure; The anti-interference ability of instruments or pressure sensors is not strong; The sensor wiring is not secure; The sensor itself vibrates severely. E. The sensor is faulty.
3. The output of the pressurized transmitter does not change, and then the output of the pressurized transmitter suddenly changes. The zero position of the pressure relief transmitter cannot return. Check the sealing ring of the sensor, usually due to the specification of the sealing ring (too soft or too thick). When the sensor is tightened, the sealing ring is compressed into the pressure inlet of the sensor to block the sensor, and the pressure medium cannot enter during pressurization.
However, when the pressure is high, the sealing ring suddenly bursts open, causing the pressure sensor to change due to the pressure. When the pressure drops again, the sealing ring returns to its original position and blocks the pressure inlet. The remaining pressure cannot be released, so the zero position of the sensor cannot be lowered. The method to eliminate this problem is to remove the sensor to see if the zero position is normal. If it is normal, replace the seal ring and try again.
4. 3051 pressure transmitter is powered on without output
a) Wrong wiring (both instruments and sensors need to be checked)
b) Open circuit or short circuit of the wire itself
c) No power output or power mismatch
d) Damaged or mismatched instruments
e) Sensor damage
5. Error of 3051 pressure transmitter
Method to confirm the normal error range: Calculate the error value of the pressure gauge. For example, the pressure gauge has a range of 30bar, an accuracy of 1.5%, and a minimum scale of 0.2bar. The normal error is: 30bar * 1.5%+0.2 * 0.5 (visual error)=0 Error value of 55bar pressure transmitter.
Overall, the analysis and handling of some faults that occur during the use of the 3051 pressure transmitter mainly rely on the following methods.
a) Replacement method: Prepare a normally used 3051 pressure transmitter and directly replace the suspected faulty one. This can easily and quickly determine whether it is a fault of the 3051 pressure transmitter itself or a fault of pipelines or other equipment.
b) Circuit breaking method: Separate the suspected faulty part from other parts and check if the fault has disappeared. If it does, determine the location of the fault. Otherwise, proceed to the next step of investigation, such as: the intelligent differential pressure transmitter cannot
