Assuming that the power supply is normal, it is necessary to carry out simple pressurization to see if the output has changed, perhaps to observe whether the zero position of the sensor has output, assuming that it has not changed, the sensor has been damaged, and vice versa, it is the appearance of the damage or other links of the whole system.
First, the pressure can go up, but the output of the transmitter can't go up
In this case, you should first check whether there is a leak in the pressure interface or it may be blocked, assuming that it is confirmed, then check whether the wiring method is wrong and check the power supply, assuming that the power supply is normal, you should simply pressurize to see if the output has changed, or observe whether the zero position of the sensor has an output, assuming that it has not changed, the sensor has been damaged, otherwise it is the appearance of the damage or other links of the whole system.
Second, the problem of the sealing ring of the pressure sensor
The first pressurization, the transmitter output does not change, and the output of the pressurized transmitter suddenly changes, and the transmitter cannot return to the zero position after the pressure is relieved, which is likely to be a problem with the pressure sensor seal. It is common for the sensor to be tightened and the seal is compressed into the sensor impasse due to the sealing standard, which blocks the sensor. When pressurized, the pressure medium cannot enter, but when the pressure is high, the sealing ring is suddenly opened, and the pressure sensor is changed by pressure. The way to eliminate this problem is to remove the sensor, directly observe whether the zero position is normal, if the zero position is normal, you can replace the sealing ring and try again.
3. The output signal of the transmitter is unstable
This problem can definitely be a problem with the stressor. The pressure source itself is an unstable pressure, and it is likely that the appearance or pressure sensor is not strong in terms of anti-interference ability, the sensor itself vibrates very strongly, or the sensor is damaged.
Fourth, the deviation between the transmitter and the pointer pressure gauge is large
It is normal to present this kind of deviation, and it is sufficient to confirm the normal scale of deviation; The last problem that tends to arise is the effect of the installation position of the differential pressure transmitter on the zero output. Due to the small measurement scale of the microdifferential pressure transmitter, the sensing element in the transmitter will affect the output of the microdifferential pressure transmitter. When installing, the pressure sensitive parts of the transmitter should be axial 90 degrees perpendicular to the direction of gravity, and remember to adjust the zero position of the transmitter to the standard value after installation and fixation.
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