Selection factors affecting the accuracy grade of pressure transmitter

Pressure transmitter is a common sensor in industrial practice. The development of pressure transmitter has made a great breakthrough in technology. From the early large displacement pressure transmitter to the force-balanced differential pressure transmitter in the 1950s, from the displacement transmitter with simple structure in the 1970s to the intelligent transmitter in the 1990s, and from ZI to today's multi-type pressure transmitter with simple structure and strong reliability, the pressure transmitter has made great progress in structure, appearance and performance.

The pressure transmitter has a unique local button box backlight LCD meter. Through the local button, various functions can be configured, zero adjustment and full adjustment can be completed at one time, the range can be set with or without pressure, and the configuration data can be locked. The liquid crystal meter with backlight overcomes the shortcoming that the liquid crystal indicator is not easy to read in dim light, and the large window can indicate the pressure value, current value, percentage value and so on with physical units.

The factors that affect the selection of accuracy grade of pressure transmitter are nonlinearity, hysteresis, non-repeatability of electromechanical business network, temperature, zero offset scale and temperature. But it is mainly due to nonlinearity, hysteresis and non-repetition. The higher the accuracy, the higher the price. Pressure transmitter is widely used in various industrial automatic control environments because of its simple structure, durability, high stability, high accuracy and good linearity, and wide measurement range, involving water conservancy and hydropower, railway transportation, intelligent building, production automatic control, aerospace, military industry, petrochemical industry, oil well, electric power, ships, machine tools, pipelines and many other industries. Pressure transmitter is a common sensor in industrial practice. The development of pressure transmitter has made a great breakthrough in technology. From the early large displacement pressure transmitter to the force-balanced differential pressure transmitter in the 1950s, from the displacement transmitter with simple structure in the 1970s to the intelligent transmitter in the 1990s, and from ZI to today's multi-type pressure transmitter with simple structure and strong reliability, the pressure transmitter has made great progress in structure, appearance and performance.

The pressure transmitter has a unique local button box backlight LCD meter. Through the local button, various functions can be configured, zero adjustment and full adjustment can be completed at one time, the range can be set with or without pressure, and the configuration data can be locked. The liquid crystal meter with backlight overcomes the shortcoming that the liquid crystal indicator is not easy to read in dim light, and the large window can indicate the pressure value, current value, percentage value and so on with physical units.

The factors that affect the selection of accuracy grade of pressure transmitter are nonlinearity, hysteresis, non-repeatability of electromechanical business network, temperature, zero offset scale and temperature. But it is mainly due to nonlinearity, hysteresis and non-repetition. The higher the accuracy, the higher the price. Pressure transmitter is widely used in various industrial automatic control environments because of its simple structure, durability, high stability, high accuracy and good linearity, and wide measurement range, involving water conservancy and hydropower, railway transportation, intelligent building, production automatic control, aerospace, military industry, petrochemical industry, oil well, electric power, ships, machine tools, pipelines and many other industries.

Debugging steps of analyzing pressure transmitter without output

Debugging steps of analyzing pressure transmitter without output:

1. Check whether the power supply of the differential pressure transmitter is connected backwards, and whether the positive and negative poles of the power supply are connected correctly.

2. Measure the power supply of the transmitter to see if there is a 24V DC voltage; The power supply voltage to the transmitter must be ≥12V (that is, the terminal voltage at the input of the transmitter's power supply is ≥12V). If there is no power supply, check whether the loop is broken, whether the detection instrument is selected incorrectly (the input impedance should be ≤250Ω) and so on.

3. If the pressure transmitter is equipped with a meter, it is necessary to check whether the meter is damaged (two wires of the meter can be short-circuited first, and if it is normal after short-circuiting, it means that the meter is damaged). If it is, it is necessary to change the meter.

4. If there is a problem with the differential pressure transmitter, connect the ammeter in series with the 24V power supply circuit to check whether the current is normal. If it is normal, it means that the transmitter is normal. At this time, check whether other instruments in the loop are normal.

5. Whether the power supply is connected to the power input end of the transmitter, and connect the power cord to the power connection port.

The steps of debugging pressure transmitter without output are basically the above situations. Of course, in practical application, there may be many problems that cause the differential pressure transmitter to fail to work normally. Before installation and use, it is recommended that you carefully troubleshoot.

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