The first is pressure, and the transmitter can't afford to lose it. In this case, look at the pressure connector to see if it is leaking or clogged, if not, look at the wiring scheme and see if the power supply is normal, simple pressure to confirm if the output has changed, or if there is an output at the zero point of the sensor, if there is no change, the sensor is damaged, it may be cosmetic damage or other aspects of the system.
Second, the output of the pressure transmitter has not changed, the output of the pressure transmitter has changed suddenly, and the zero point of the pressure reducing transmitter cannot be returned, which is likely to be 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 can not enter, the pressure medium can not 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 fault 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 done again.
Third, the output signal of the transmitter is unstable. The problem with this malfunction 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 external or pressure sensor, the vibration of the sensor itself, and the failure of the sensor.
The fourth is that there is a large error between the transmitter and the pointer pressure gauge. Error is a normal phenomenon, and the normal error scale can be confirmed; The latter fault is the effect of the device position 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 straight and straight in the direction of gravity, and the zero point of the transmitter should be adjusted to the standard value after installation.
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Some models of the sensor
The model number of the sensor
P+F NBB10-30GM60-WS
P+F NJ50-FP-E2-P1
P+F NBN8-18GM50-E2
P+F NJ50-FP-A2-P1
P+F KT10/33
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