The first is pressure, and the transmitter can't afford to lose it. In this case, look at the pressure connection to see if it is leaking or clogged, if it is not, look at the wiring and see if the power supply is normal, simple pressure to determine if the output has changed, or if there is an output at the zero point of the sensor, if it has not changed, the sensor is damaged, it may be cosmetic damage or other aspects of the system.
Second, the output of the pressure transmitter does not change, the output of the pressure transmitter changes suddenly, and the zero point of the pressure reducing transmitter cannot come back, which is most likely a problem with the sealing ring of the pressure sensor. Because of the specification requirements of the sealing ring, after the sealing ring is tightened, the sealing ring is compressed into the sensor inlet, so that the sensor cannot enter, and the pressure medium cannot enter when the pressure is high, and the sealing ring is suddenly broken when the pressure is high, and the pressure sensor is changed by pressure. The best way to eliminate this problem is to remove the sensor and see directly if the zero point is normal. If the zero position is normal, the seal can be replaced and the test run can be carried out again.
Third, the output signal of the transmitter is unstable. The problem with this problem is that KEN is a stressor. The pressure source itself is unstable pressure, which is most likely caused by the weak anti-interference ability of the appearance or pressure sensor, the vibration of the sensor itself, and sensor malfunctions.
The fourth is that there is a large deviation between the transmitter and the pointer pressure gauge. Deviation is a normal phenomenon, and the normal deviation scale can be determined; The latter problem is the effect of the orientation of the differential pressure transmitter on the zero output. Because the measurement scale of the differential pressure transmitter is small, the sensor element in the transmitter will affect the output of the differential pressure transmitter. At the time of installation, the pressure-sensitive part of the transmitter should be perpendicular to the direction of gravity, and the zero point of the transmitter should be adjusted to the standard value after installation.
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