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, and whether there is "noise" or other electronic interference signals. Whether the amplifier is required, the orientation of the amplifier, etc. For many OEM equipment where the gap between the Rosemount transmitter and the controller is short, the most economical and useful solution is to use a Rosemount transmitter with mA output, and if the output signal needs to be amplified, it is best to use a Rosemount transmitter with built-in amplification. For signals transmitted from a long distance or with strong electronic interference, it is best to use mA-level 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 does the Rosemount transmitter require: the resolution accuracy is, nonlinearity, hysteresis, non-repeatability, temperature, zero bias 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 meter will have accuracy errors, 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, which 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% and 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, the need 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 damage 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. So, it's possible to use a buffer to lower the pressure burr, but that slows down the sensor's response. 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 damage the data in direct contact with these media. These elements will determine whether to choose a direct barrier film and information that touches directly with the medium. The 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 the pressure Rosemount transmitter is suitable for your measurement of medium pressure. If your medium is corrosive to 316 stainless steel, then we should choose a chemical seal, which can not only measure the pressure of the medium, but also effectively block the contact between the medium and the wetted part of the pressure Rosemount transmitter, so as to protect the pressure Rosemount transmitter and prolong 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 at which the Rosemount transmitter is not damaged during operation, and when the temperature compensation scale is exceeded, the performance target of its operation may not be achieved. The temperature compensation scale is a typical scale that is smaller than the operating temperature scale. Operating at this scale, the Rosemount transmitter is sure to meet its performance targets. 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, if these parameters are not available, it will lead to uncertainty in application. 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 influences are the most messy part of understanding how to use a Rosemount transmitter.
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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 causes inaccurate measurements in Rosemount pressure transmitters
Rosemount Pressure Transmitter Inaccurate Measurement Causes:
1. Whether the power supply of the Rosemount pressure transmitter is normal, if it is less than 12VDC, you should check whether there is a large load in the circuit, and the input impedance of the transmitter load should be in line with RL≤ (transmitter supply voltage -12V)/(0.02A...
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How to care for your Rosemount pressure transmitter after use
Eight ways to use Rosemount pressure transmitters:
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 wrap it around.
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Rosemount transmitter installation requirements and how to install it
Rosemount transmitters must be installed in a constant temperature environment, which is also determined by the characteristics of the flange transmitter. Because the measured medium of ordinary transmitters generally enters the transmitter measurement chamber through the impulse tube. If the measurement is a viscous liquid medium, it will be easier to form a conductive ...
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How to choose a Rosemount transmitter for standard accuracy
Not every Rosemount product is the same, for example, the 3051 pressure transmitter and the 3051S high-precision pressure transmitter are not in the same range. But there is also a big relationship between the two. For example, the 3051CD transmitter is now used in ...
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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 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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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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A summary of methods for on-site inspection of Rosemount transmitter failures
When something goes wrong with the Rosemount transmitter, you can first use the common methods of on-site inspection to check it, such as: query method: recall the ignition, smoke, odor, power supply change, lightning strike, wetting, misoperation, and mismaintenance before the fault occurs; Intuitive method: investigate external damage to the circuit, leakage of the impulse pipe, ...
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Factors to consider for Rosemount 5300 Series Radar Level Gauge Interface Measurements
For applications where the waveguide is completely submerged in liquids, the Rosemount 5301 measurement interface can be used, but the following guidelines should be followed
1. The dielectric constant of the above product must be known and cannot be changed. The Radar Master software has built-in dielectric constant calculations ...
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Installation of Rosemount transmitter attachments
The Rosemount transmitter is an important accessory in the use of time and time and time components, which will also affect the accuracy of the transmitter measurement results. Therefore, in order to prevent the occurrence of measurement errors, we need to pay attention to the following points in the equipment process of additional equipment.
1. Rosemont ...
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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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Rosemount transmitters are affected by the angle of inclination of the installation
The actual working performance of the Rosemount transmitter will be affected by the angle of inclination, ambient temperature, static pressure and fluid temperature of the device.
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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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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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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 flow meter indicates the cause of the failure
During the long-term use of the Rosemount flowmeter, there may be some problems in the manual: 1. The manual is not accurate for a long time; 2. There are always no signs; 3. It means that the fluctuation range is large and there is no reading; 4. The indication does not return to zero; 5. There is no indication when the flow rate is small; 6. When the large flow indicates that the positive ...
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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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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 the Rosemount 3051TG pressure transmitter works
The Rosemount 3051TG pressure transmitter is one of the most commonly used products in the Rosemount 3051 pressure transmitter that has been tested in the power industry for 40 years. Planning with high reliability, transient stability, and easy protection. Rosemount pressure transmitters are designed from planning to installation, from protection to operation.
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