Pressure transmitter selection
According to different application scenarios and needs, we should show practicality and economy in the selection of Rosemount pressure transmitters, and can select technical parameters from the requirements of pressure type, measuring scale, measurement medium, accuracy, applicable temperature scale, etc.
Acknowledging the type of pressure measured
Pressure sensors are divided into absolute pressure, gauge pressure, and differential pressure. When measuring absolute pressure, the measured pressure has nothing to do with atmospheric pressure, but is relative to the vacuum pressure; The gauge pressure is based on atmospheric pressure, so one side of the elastic membrane of the sensor is always connected to the atmosphere; The differential pressure is the fluid pressure that is introduced separately from both sides of the elastic membrane of the sensor, and the differential pressure between different locations of the fluid or between the fluids can be measured. Different types of pressure sensors should be used for different applications.
Acknowledging the range scale of the pressure transmitter
We all know that the tension spring scale that appears in the junior high school physics course is an object that cannot be weighed excessively, that is, it cannot exceed its range scale, because it will cause the tension spring to deform and can no longer be used. The same is true for pressure sensors, generally we need to choose a sensor with a pressure range that is about 1.5 times larger than the maximum value of practical measurement. In many measurement environments, there are peaks or persistent irregular pressure fluctuations, and if these forces are not within the measuring range, it is likely to damage the pressure sensor or shorten the life of the sensor.
Acknowledging the measuring medium of the pressure transmitter
Some measuring media will have permeability, corrosiveness and other characteristics, which will affect and damage the pressure sensor, so its sealing and corrosion resistance need to be considered when selecting the sensor. For example, viscous liquids such as crude oil need to avoid their sediment blocking the pressure interface, so it is necessary to choose a flat film structure sensor with a barrier film to avoid direct contact with the medium, and at the same time, it is also necessary to select raw materials compatible with these media as the barrier film, otherwise it will affect the service life of the product.
Acknowledging the accuracy of the pressure transmitter
The accuracy requirements of the sensor are generally linked to the economy, because the higher the accuracy, there must be a lot of high-end technology and calibration process and compensation skills added to the manufacturing process, and the corresponding cost will improve, and the price will also improve. Therefore, when we choose products, we should not only seek high precision, but should make reasonable selections according to the needs of practical measurement.
Acknowledging the applicable temperature scale of the pressure transmitter
The applicable temperature scale of the pressure transmitter is linked to the accuracy of the measurement value, because the sensitive element of the pressure sensor has thermal zero drift and thermal sensitivity drift, so it should be reasonably selected according to the practical application of the pressure sensor.
For example, the compensation temperature scale of a pressure sensor is -20-80 °C, and the operating temperature scale is -20-150 °C, indicating that the pressure sensor can definitely reach the due performance index at -20-80 °C, and the sensor can operate normally without being damaged at -80-120 °C, but it may not be able to reach the performance indexWhen exceeding 120°C or below -20°C, the sensor may be damaged.
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Fault Judgment in Rosemount Differential Pressure Transmitter Applications
Fault judgment and analysis in the application
In the process of measuring the transmitter, there are often some problems, and the timely analysis and treatment of faults are crucial for the ongoing production According to the experience of daily maintenance, some of the analysis methods and analysis methods are summarized and summarized.
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How to maintain the Rosemount 3051 pressure transmitter
United States rosemount 3051 pressure transmitter maintenance is mainly divided into two points:
1. In the whole process of accurate measurement, some common faults often occur in the Rosemount pressure transmitter, and the immediate judgment and analysis and resolution of common faults are especially important for the production and manufacturing that has been carried out.
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What factors affect the performance of the Rosemount 3051 differential pressure transmitter?
1. Effect of temperature
Rosemount differential pressure transmitters will vary greatly in process temperature, ambient temperature, and will certainly differ from the reference conditions when the transmitter is tested, which also means that the functionality will be different from the reference accuracy presented. Temperature on differential pressure transmitters ...
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Rosemount transmitter signal line grounding method
If the Rosemount transmitter does not have alarms and safety adjustment options installed, the transmitter will typically operate according to the default alarm settings, i.e., the alarm condition is set to "high" and the safety is set to "off". Then proceed as follows:
1. ...
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How the Rosemount transmitter is wired
During the use of the Rosemount transmitter, wire the Rosemount transmitter according to the following steps:
1. Take out the Rosemount 3051 and remove the electronic enclosure marked "FIELD TERMINALS".
2. Will be positive ...
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The Rosemount 3051 transmitter cannot be powered on
The Rosemount 3051 transmitter will not be powered on or may damage the transmitter after it is placed in the tripping device. When our technicians have understood these problems, they have analyzed and made corresponding countermeasures from three aspects, as follows:
Rosemont ...
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Rosemount differential pressure transmitter selection considerations
The following points should be considered in the selection of differential pressure transmitters:
1. Measure the scale, the accuracy of the demand and the measurement function;
2. Measure the environment of the outer surface, such as the industrial environment of petrochemical industry, the existence of flammable, toxic and explosive risk atmosphere, and the high ambient temperature;
3 tested ...
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Eight ways to maintain your Rosemount 3051 pressure transmitter
1. When measuring steam or other high-temperature media, it is necessary to connect a condenser such as a buffer tube (coil), and the working temperature of the Rosemount transmitter should not exceed the limit.
2. When wiring, pass the cable through the waterproof joint or winding pipe and tighten the sealing nut to prevent rain from leaking through the cable.
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How Rosemount Electromagnetic Flowmeters Troubleshoot Air Ducts
Rosemount Electromagnetic Flowmeter Eliminates Empty Pipe ProblemRosemount Electromagnetic Flowmeter Eliminates Empty Pipe Problem
If the ATC detection is unexpected, the following measures can be adopted:
1. Make sure the sensor is overflowing.
2. Ensure that the measuring electrode has not been installed on the top of the pipe of the sensor.
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What are the main advantages of Rosemount temperature transmitters?
What are the main advantages of Rosemount temperature transmitters?
1. Only by adapting to harsh environments can it be strong
Rosemount temperature transmitters generally work in a wide range of environments, from extremely cold to extremely hot areas, many of which work in the open air.
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How to maintain and clean the Rosemount 3051DP differential pressure transmitter
After a period of use, the Rosemount 3051DP differential pressure transmitter needs to be cleaned regularly to maintain the accuracy of the differential pressure transmitter and achieve the desired function. Generally, the differential pressure transmitter should be cleaned in the following order:
1. Close the high-voltage side ...
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Rosemount temperature transmitter performance improvements
The fundamental function of the Rosemount 644 temperature transmitter is to make serious improvements based on extensive user feedback and application sensitivity requirements in various industries.
1. Power terminal placement: Now the power supply and communication terminal are placed at the bottom right of the equipment, and the LCD can be carried out without removing the LCD.
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Summary of problems in the use of the Rosemount 3051 transmitter
1. What kind of output signal does the Rosemount transmitter need to obtain: mV, V, mA and frequency output digital output, and the choice of what kind of output depends on a variety of factors, including the separation between the Rosemount transmitter and the system controller or display, whether there is "noise" or other electronic interference signals.
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Features of Rosemount pressure transmitters:
The main features of Rosemount pressure transmitters are as follows:
1. It has the function of converting high and low pressure side:
The conversion function of the high and low voltage side of this sensor is mainly through the adjustment of the internal parameters of the handheld communicator, and the useful data on the high and low voltage side is realized.
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Problems to be noted when calibrating Rosemount transmitters
1. After adjusting the zero point, use the standard pressure source to apply pressure slowly, and increase the pressure to the maximum scale, and the output value is about 20mA.
2. The verification regulations require that the two high and low pressure chambers of H and L are connected to the outside world, and observe that the zero position is not in the direction of 4mA.
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Rosemount 3051S direct-attach pressure transmitter
The Rosemount 3051S direct-attach pressure transmitter is a professional-class solution for optimized functionality. This scalable SuperModule™ platform reduces process variation and reduces protection, making it particularly useful for gauge and absolute pressure measurement in Rosemont transmitters. Should...
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The Rosemount 3051 transmitter meter shows what the cause of the FAIL fault is
1. Look at whether the diaphragm is damaged, if not, after removing it, press it with chopsticks after imitating the power on in the room to see if there is a pressure display, if there is a display change, you can only disassemble another one, see if the transmitter module is broken, because the transmitter modules are integrated ...
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Problems encountered during the use of the Rosemount 3051 transmitter
1. What kind of output signal does the Rosemount transmitter need to get: mV, V, mA and frequency output digital output, and the choice of what kind of output depends on a variety of factors, including the separation between the Rosemount transmitter and the system controller or display, whether there is "noise" or other electronic interference signals.
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A method for verifying a current loop signal for a Rosemount pressure transmitter
The Rosemount pressure transmitter uses a 4-20mA signal, which is the conversion value of the output generated by the pressure transmitter. The output of the transmitter is detected according to the HART protocol, however, it is converted to a proportional current so that it can be visualized as a reading. Normally, at zero level output, the transmitter displays 4mA ...
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How Rosemount pressure transmitters work
1. The working principle of Rosemount pressure transmitter
When the Rosemount pressure transmitter operates, the process pressure is transferred to the filling fluid by the isolation diaphragm and filling fluid on the high and low pressure sides, which in turn transfers the pressure to the sensing diaphragm in the center of the sensor. The sensing diaphragm is a tensioned ...
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