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First, if the pressure goes up and the transmitter loses, then check whether the pressure interface is leaking or blocked. If it is not confirmed, check the connection mode and check the power supply. If the power supply is normal, simply pressurize it. Whether the output changes, or if there is no output from the sensor zero position, if there is no change, the sensor is damaged, which may be the damage of the instrument or other problems in the whole system.
Second, the pressure transmitter output does not change, and then pressurize the transmitter output changes suddenly, pressure relief transmitter zero can not go back This situation is likely to be the problem of pressure sensor seals. Commonly due to the sealing ring specification, after the sensor is tightened, the sealing ring is compressed to the inside of the sensor pressure inlet to block the sensor. When the pressure is applied, the pressure medium cannot enter, but when the pressure is high, the sealing ring is suddenly opened and the pressure sensor is under pressure. Variety. The best way to eliminate this kind of trouble is to remove the sensor and check if the zero position is normal. If the zero position is normal, replace the seal and try again.
Third, the pressure transmitter output signal instability This failure may be the source of pressure problems. The pressure source itself is an unstable pressure. It is very likely that the instrument or pressure sensor is not strong in anti-interference ability, the sensor itself is very vibrating, and the sensor is malfunctioning.
Fourth, the transmitter and the pointer pressure gauge control deviation Large pressure transmitter deviation is normal, confirm the normal deviation range.
V. Effect of Micro Differential Pressure Transmitter Mounting Position on Zero Output Micro Differential Pressure Transmitter Since its measurement range is very small, the sensor element in the transmitter will affect the output of the micro differential pressure transmitter. When installing, the pressure sensitive part of the transmitter should be perpendicular to the direction of gravity. After installation, adjust the transmitter zero to the standard value.
The above summarizes the five pressure sensor/transmitter fault types and their corresponding solutions. After the problems arise, you can compare them and see what kind of situation they are and take appropriate measures.
Pressure sensor and transmitter common faults and solutions
Abstract: Pressure sensors/transmitters sometimes have problems when they are used, and they can be resolved without returning to the factory. Here's a summary of what we will do next time.