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News Detail

Pressure sensor manufacturers analyze pressure sensor troubl

source:  Release date: 2018-10-14
Pressure sensor common fault

The user often uses the pressure sensor to cause the sensor to malfunction due to more or less reasons. It may be that the method of using it is not appropriate, or the external environment factor may change, or the quality of the sensor may not be produced, etc. Pressure sensor outlet failure, the following describes the most common faults and inspection methods of the four pressure sensors for each user, so that everyone can find the problem.
First, the pressure can rise, the transmitter output does not go up

In this case, check the pressure port for leaks or blockages. If confirmed, check the correctness of the wiring method and check the power supply. If the power supply is OK, simply pressurize to see if the output has changed, or check if the sensor's zero has an output. If there is no change, the sensor is damaged. Otherwise, the instrument is damaged or the rest of the system is a problem.
Second, the pressure sensor seal problem

The first time the pressure is applied, the output of the transmitter does not change and the output of the pressurized transmitter suddenly changes. After the pressure is released, the zero position of the transmitter will not return. It is very likely that there is a problem with the pressure sensor seal. Typically, due to the seal specification, the seal is compressed into the sensor pressure port after the sensor is tightened, thereby blocking the sensor. Pressure medium does not enter during pressurization

In, but when the pressure is high, the seal suddenly opens and the pressure sensor changes by pressure. A better way to eliminate such a fault is to remove the sensor and see if the zero is normal. If the zero position is normal, replace the seal and try again.
Third, the output signal of the transmitter is unstable

This kind of failure is definitely a problem with the pressure source. The pressure source itself is an unstable pressure. The resistance of the meter or pressure sensor is likely to be weak, and the sensor itself is very vibrating or the sensor is damaged.
Fourth, the deviation between the transmitter and the pointer pressure gauge is very large.

This deviation occurs normally and the normal deviation range can be confirmed; the last simple fault is the effect of the installation position of the differential pressure transmitter on the zero output. Due to the small measurement range of the differential pressure transmitter, the sensing elements in the transmitter affect the output of the differential pressure transmitter. The pressure sensitive component of the transmitter should be mounted at an angle of 90 degrees perpendicular to the direction of gravity. After installation and fixing, remember to adjust the transmitter zero to the standard value.