Emerson mass flow meter repair, how to maintain it at the same time <br> repair Emerson mass flow meter in the application of generally relatively simple, as long as the correct installation, commissioning through simple to put into use. In daily use, it is only necessary to adjust the zero point of the instrument regularly, and almost no maintenance is required. Pay attention to when using:
1. When designing, select the appropriate flowmeter for the specific situation, especially to understand the fluid properties, such as flow, temperature, pressure, density, viscosity, etc., according to these conditions, select the appropriate instrument. In addition, we must use products with better quality and good reputation to ensure good application. Must be familiar with the design standards; at the beginning we are not familiar with the design standards, in the design process, the mass flow meter (measuring medium liquefied gas) is designed after the regulating valve, resulting in the control valve is basically closed under low flow conditions, so that the quality The pressure difference between the flowmeter before and after the flowmeter is too small, and the medium flowing through the flowmeter is too small or interrupted, so that the flowmeter cannot be metered normally, causing measurement error; the final solution is to properly adjust the pressure drop of the device to a certain extent beforehand. The downstream valve opening of the flowmeter ensures that there is a sufficient differential pressure across the flowmeter to ensure continuous metering of the mass flowmeter to avoid measurement errors.
2. The success of the mass flow meter application is directly related to the installation. In addition to the normal installation requirements, special attention should be paid to reducing the effects of vibration, because the mass flow meter is based on the vibration principle, and the added vibration introduces interference. Although the instrument has been designed with integrated structure to reduce the influence of vibration interference, the external interference as small as possible is undoubtedly beneficial for accurate measurement. Therefore, the vibration from the pipeline and the on-site environment should be avoided as much as possible. Add fixed piers and other methods to overcome vibration interference.
3. When the instrument is used, it must be initialized in strict accordance with the data of the factory checklist, which is also the premise to ensure accurate measurement.
4. It is necessary to perform accurate zero calibration under the conditions of use during the use of the instrument. Maintenance Emerson mass flowmeters are high-precision measuring instruments used online. The drift of zero point has an impact on the measurement results. It must be calibrated regularly for long-term use. The key point is to perform on-line calibration of the zero point. After the instrument is put into operation, it has been calibrated twice. From the results, there is a zero-point drift problem. Although the drift does not affect its actual accuracy, it also causes a certain measurement error. Regular online calibration of zero points should be included in the scope of management of mass flow meters, and should also attract the attention of various users. The zero stability of different products is shown in Table 1.
5. Be sure to avoid exceeding the scope of the instrument, which will cause the measurement accuracy of the instrument to drop, which will cause damage to the instrument. For example, operation such as a steam sweep that exceeds the temperature range of the meter will damage the detection coil and make the meter unusable.
6. The mass flowmeter has high precision and high price, which requires careful maintenance. For example, it is equipped with high-quality regulated power supply, and the on-site vibration and use conditions are checked frequently to ensure accuracy. And the safety of the instrument.
7. Repair the Emerson mass flow meter to prevent human power failure and disconnection. The method of powering off and disassembling the signal line makes the flowmeter not metered for a short time, thus causing measurement disputes, and such problems should be noticed. The solution is to have the lock of the instrument box, and the person in charge is responsible for management; in addition, the designer should consider the above problems and include such problems in the design category.
1. When designing, select the appropriate flowmeter for the specific situation, especially to understand the fluid properties, such as flow, temperature, pressure, density, viscosity, etc., according to these conditions, select the appropriate instrument. In addition, we must use products with better quality and good reputation to ensure good application. Must be familiar with the design standards; at the beginning we are not familiar with the design standards, in the design process, the mass flow meter (measuring medium liquefied gas) is designed after the regulating valve, resulting in the control valve is basically closed under low flow conditions, so that the quality The pressure difference between the flowmeter before and after the flowmeter is too small, and the medium flowing through the flowmeter is too small or interrupted, so that the flowmeter cannot be metered normally, causing measurement error; the final solution is to properly adjust the pressure drop of the device to a certain extent beforehand. The downstream valve opening of the flowmeter ensures that there is a sufficient differential pressure across the flowmeter to ensure continuous metering of the mass flowmeter to avoid measurement errors.
2. The success of the mass flow meter application is directly related to the installation. In addition to the normal installation requirements, special attention should be paid to reducing the effects of vibration, because the mass flow meter is based on the vibration principle, and the added vibration introduces interference. Although the instrument has been designed with integrated structure to reduce the influence of vibration interference, the external interference as small as possible is undoubtedly beneficial for accurate measurement. Therefore, the vibration from the pipeline and the on-site environment should be avoided as much as possible. Add fixed piers and other methods to overcome vibration interference.
3. When the instrument is used, it must be initialized in strict accordance with the data of the factory checklist, which is also the premise to ensure accurate measurement.
4. It is necessary to perform accurate zero calibration under the conditions of use during the use of the instrument. Maintenance Emerson mass flowmeters are high-precision measuring instruments used online. The drift of zero point has an impact on the measurement results. It must be calibrated regularly for long-term use. The key point is to perform on-line calibration of the zero point. After the instrument is put into operation, it has been calibrated twice. From the results, there is a zero-point drift problem. Although the drift does not affect its actual accuracy, it also causes a certain measurement error. Regular online calibration of zero points should be included in the scope of management of mass flow meters, and should also attract the attention of various users. The zero stability of different products is shown in Table 1.
5. Be sure to avoid exceeding the scope of the instrument, which will cause the measurement accuracy of the instrument to drop, which will cause damage to the instrument. For example, operation such as a steam sweep that exceeds the temperature range of the meter will damage the detection coil and make the meter unusable.
6. The mass flowmeter has high precision and high price, which requires careful maintenance. For example, it is equipped with high-quality regulated power supply, and the on-site vibration and use conditions are checked frequently to ensure accuracy. And the safety of the instrument.
7. Repair the Emerson mass flow meter to prevent human power failure and disconnection. The method of powering off and disassembling the signal line makes the flowmeter not metered for a short time, thus causing measurement disputes, and such problems should be noticed. The solution is to have the lock of the instrument box, and the person in charge is responsible for management; in addition, the designer should consider the above problems and include such problems in the design category.
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