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, and whether there is "noise" or other electronic interference signals. Whether an expander is needed, the location of the expander, etc. For many OEM equipment with short intervals between Rosemount transmitters and controllers, a Rosemount transmitter with an mA output is the most economical and useful solution, and if the output signal needs to be expanded, a Rosemount transmitter with built-in expansion is preferred. For signals transmitted at long distances or with strong electronic interference, it is best to choose mA output or frequency output. In the case of an environment with high RFI or EMI targets, in addition to the mA or frequency output, special protections or filters should be taken into account.
2. How much accuracy is required for the Rosemount transmitter: the resolution accuracy is, nonlinearity, hysteresis, non-repeatability, temperature, zero offset scale, and the influence of temperature. But it is mainly caused by nonlinearity, hysteresis, non-repeatability, and the higher the accuracy, the higher the price. Each electronic measuring instrument will have an accuracy error, but because the accuracy level of each country is different, for example, the accuracy of national standards such as China and United States is the best part of the linear degree of the sensor, that is, the accuracy between 10% and 90% of the measurement scale we generally say; The accuracy of the European standard is the least good part of linearity, which is what we generally call the accuracy between 0 and 10% and 90% to 100%. If the accuracy of the European standard is 1%, the accuracy of the standard in China is 0.5%.
3. What kind of pressure should be measured by the Rosemount transmitter: first determine the maximum value of the measured pressure in the system, generally speaking, it is necessary to select a Rosemount transmitter with a pressure range about 1.5 times greater than the maximum value. This is mainly due to the fact that in many systems, especially in water pressure measurement and processing, there are peaks and continued irregular up and down fluctuations, and this instantaneous peak can destroy the pressure sensor, and continued high pressure values or slightly exceed the calibrated maximum value of the Rosemount transmitter will shorten the life of the sensor, however, because doing so will reduce the accuracy. As a result, a buffer can be used to lower the pressure burr, but this will slow down the response speed of the sensor. Therefore, when selecting a Rosemount transmitter, it is necessary to fully consider the pressure scale, accuracy and stability.
4. What kind of pressure medium: what we need to consider is the medium measured by the pressure Rosemount transmitter, viscous liquids and mud will block the pressure interface, and solvents or corrosive substances will not destroy the data that the transmitter is directly touched with these media. These factors will determine whether to choose a direct barrier film and a direct contact with the medium. The raw material of the touch medium part of the general pressure Rosemount transmitter is 316 stainless steel, if your medium is not corrosive to 316 stainless steel, then basically all pressure Rosemount transmitters are suitable for you to measure the pressure of the medium. If your medium is corrosive to 316 stainless steel, then we should choose a chemical seal, which not only can measure the pressure of the medium, but also can effectively prevent the contact between the medium and the wetted part of the pressure Rosemount transmitter, so as to protect the pressure Rosemount transmitter and extend the life of the pressure Rosemount transmitter.
5. Temperature scale of Rosemount transmitter: Generally, a Rosemount transmitter will calibrate two temperature scales, that is, the temperature scale of normal operation and the scale of temperature compensation. The normal operating temperature scale refers to the temperature scale of the Rosemount transmitter when it is not damaged in the operating state, and when the temperature compensation scale is exceeded, the performance target of its use may not be achieved. The temperature compensation scale is a typical scale that is smaller than the operating temperature scale. Working at this scale, the Rosemount transmitter is sure to achieve its performance goals. The temperature change affects its output in two ways: one is the zero drift; The second is to affect the full-scale output. For example, +/-X%/°C of full scale, +/-X%/°C of reading, +/-X% of full scale when the temperature scale is exceeded, +/-X% of the reading when the temperature compensation scale is exceeded, without these parameters, it will lead to uncertainty in use. The change in the output of the Rosemount transmitter to the degree is caused by the change in pressure and still by the change in temperature. Temperature effects are the most messy part of understanding how to use a Rosemount transmitter.
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Rosemount X-Well Wins Best Product Award in Sensor Category
Shanghai, China (November 3, 2016) – Emerson's Rosemount X-Well Technology temperature measurement components won the Best of the Best Product Award in the Sensors category at the highly anticipated CONTROL ENGINEERING China 2016 annual competition.
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Types of Rosemount transmitters
The intelligent Rosemount transmitter is also equipped with a hand-held terminal (external data setter or grouper) for setting the transmitter parameters, such as setting the type of transmitter, range adjustment, zero point adjustment, input signal selection, output signal selection, engineering unit selection and damping time constant.
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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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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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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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Features of the Rosemount 8732E Electromagnetic Flowmeter:
1. The measurement is not affected by the change of fluid density, viscosity, temperature, pressure and conductivity.
2. There are no obstruction moving parts in the measuring pipe, no pressure loss, and the requirements for the straight pipe section are low. There is a common adaptability to slurry measurement.
3. Reasonable selection of sensor lining and electrode materials, ...
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Installation requirements for Rosemount transmitter impulse tubing
The effect of the pressure impulse pipe is to transmit the pressure of the process medium to the transmitter to measure, in order to obtain accurate measurement values for the process measurement. There are many details that need to be paid attention to at the time of the installation, and the following summarizes the Luo ...
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Factors to consider when sizing the Rosemount 3051 pressure transmitter
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.
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How the Rosemount 3051 pressure transmitter works
The 3051 pressure transmitter is used to measure the level, density, and pressure of liquids, gases, or vapors, and then convert the pressure signal into a 4-20mADC signal output. There are mainly capacitive pressure transmitters and diffusion silicon pressure transmitters, ceramic pressure transmitters, strain gauge pressure transmitters, etc.
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That's how Rosemount transmitters should be selected
Rosemount transmitter selection requires a good transmitter before use, so its selection is very important
1. According to the pressure interface mode
Generally, threaded connection is the standard interface method.
2. According to the required accuracy level
Measurement error of the transmitter ...
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Rosemount transmitter pressure gauges are widely used
Rosemount transmitters are used in industrial process control and technical measurement processes, because the elastic and sensitive elements of mechanical pressure gauges have high mechanical strength and easy production, so that mechanical pressure gauges are more and more widely used.
Rosemont ...
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Features of the Rosemount Transmitter 3051S Series High Precision Transmitters:
Features of the Rosemount Transmitter 3051S Series High Precision Transmitters:
Advanced diagnosis
Advanced diagnosis provides ongoing process monitoring to ensure the integrity and security of the process environment. The Statistical Process Monitoring (SPM) skill alerts you to deal with issues and anomalies. This comprehensive ...
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External factors influencing the failure of the Rosemount 3051 transmitter
1. The impulse tube is faulty
There are two simplest problems with the pressure duct of the Rosemount 3051 transmitter, which is blockage and leakage of the pressure duct. Once this problem is presented, the most obvious manifestation is that the leakage surface index of the impulse pipe will be abnormal.
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The Rosemount Twisted Square thermowell avoids wake shedding
When a problem arises in the design of Rosemount thermowells, it is necessary to analyze the cause of its failure, and then go further and propose solutions. In some less complicated cases, it may be necessary to make a small change, such as adding one millimeter without changing the predetermined measurement orientation ...
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Rosemount transmitters feature two-way communication
The intelligent Rosemount transmitter is composed of a sensor and a microprocessor (microcomputer), which makes full use of the computing and storage capabilities of the microprocessor to process the data of the sensor, including the conditioning of the measurement signal (such as filtering, amplification, A/D conversion, etc.), data display, etc.
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Pipe diameter requirements for the installation of the Rosemount 8800D vortex flowmeter
1. The upstream and downstream pipe diameter of the flowmeter on the installation point must be installed in accordance with the standard flowmeter caliber, otherwise the measurement accuracy will be affected.
2. If there is a tapering pipe in the upstream of the flowmeter installation point, there should be a straight pipe section of equal diameter of not less than 15D (D is the diameter of the pipe) in the upstream of the flowmeter, and there should be ...
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What to do if the Rosemount pressure transmitter measurement is inaccurate
Common Rosemount pressure transmitter measurement incorrect situations:
1. The input impedance of the Rosemount transmitter load should be in line with RL≤ (transmitter supply voltage -12V)/(0.02A)Ω if necessary, if it does not match, corresponding measures can be adopted according to its differences: such as increasing the power supply ...
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Rosemount Models 2088, 2090F, and 2090P Pressure Transmitters Quick Installation Guide
1.Rosemount 2088
Install it directly to the impulse pipe without the need for an additional mounting bracket, or use the optional mounting bracket to mount it directly to a wall, panel, or 2" pipe.
2. Rosemount 2090P
Use of existing welded short casings ...
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How to maintain the United States rosemount3051 pressure transmitter
Rosemount pressure transmitters often have some common faults in the whole process of accurate measurement, and the immediate judgment and resolution of common faults is especially important for the manufacturing that has been carried out. According to the work experience in the usual maintenance, people have summarized and sorted out some ...
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How to troubleshoot the Rosemount 3051 differential pressure transmitter if it encounters problems
1. Line failure
When the computer in the Rosemount transmitter monitoring system shows abnormal values, it is necessary to immediately check the line status of the junction box of the differential pressure transmitter to see if there is a short circuit, etc., and the way to check is to measure the resistance.
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