Do you know which kinds of common faults are used to pull pressure sensors?
Many users often use the pressure sensor to cause problems with the sensor for more or less reasons. It may be incorrect in use, or the external environment factor may change, or the quality of the sensor production. Off and so on may all be factors that cause the pressure sensor to malfunction.
The following is a small series for you to introduce the four most common faults and inspection methods used in the use of pull-down pressure sensors, so that you can find the problem, so that it can be handled, let's take a look.
First, the output signal of the transmitter is unstable
This type of failure is definitely a problem with the pressure source. The pressure source itself is an unstable pressure. The resistance of the meter or the tension sensor is likely to be weak, and the sensor itself is very vibrating or the sensor is damaged.
Second, the pressure can rise, the transmitter output does not go
In this case, check the pressure port for leaks or blockages. If confirmed, check the wiring method for correctness and check the power supply. In the case of normal power supply, we can check whether the output has changed by pressing or checking whether the zero position of the sensor has output. If there is no change, the sensor is damaged. Otherwise, the instrument is damaged or the rest of the system is a problem.
Third, 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. Because the differential pressure transmitter has a small measuring range, the sensing elements in the transmitter affect the output of the differential pressure. 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.
Fourth, pull the pressure sensor seal problem
For the first pressurization, the output of the transmitter has not changed and the output of the pressurized transmitter suddenly changes. After the pressure is released, the zero position of the transmitter will not return, which may be a problem with the sealing ring. In general, due to the specifications of the seal standard, the seal is compressed into the sensor pressure port after the sensor is tightened, thereby blocking the sensor. The pressure medium does not enter during pressurization, but when the pressure is high, the seal ring suddenly opens and the tension pressure sensor changes by pressure. A better way to resolve these faults is to remove the sensor and see if the zero is normal. If the zero is normal, replace the seal and try again.
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