In the measurement of compressed air flow, compressed air vortex flowmeter has been widely used in industrial production, the role is more and more important, if the vortex flowmeter in the use of the process of measurement data inaccurate, then we must promptly determine which aspect of the problem caused by the flow of error.
Measurement accuracy is usually expressed as the error range of the measurement result, i.e. the deviation between the measured value and the real value of the instrument. For compressed air vortex flow meters, the measurement accuracy is usually expressed as a percentage, such as ±1.0% or ±1.5%. This means that the deviation between the measured value and the true value of the meter within the measurement range will not exceed this percentage.
1. Influence of temperature on measurement
Temperature on the general flowmeter measurement medium will have an impact, the temperature level affects the density of the medium, viscosity, ETC。, these will make the measurement results inaccurate, error. Eliminate this effect is generally corrected for the K coefficient. Currently some manufacturers of compressed air vortex flowmeter has the effect of temperature in the software for fixed temperature correction and real-time temperature correction.
2. Problems with selection
The actual selection should be selected as small as possible caliber, in order to improve the measurement accuracy, for example, a vortex pipeline designed for use by several devices, due to the process part of the equipment is sometimes not used, resulting in the actual use of the current flow rate reduction, the actual use of the original design caused by the selection of the caliber is too large, which is equivalent to improve the measurable flow rate of the lower limit of the process pipeline can not be guaranteed when the indication of a small flow rate, the flow rate of a large amount of time can also be used, because if the To re-model sometimes too difficult, changes in process conditions are only temporary. Can be combined with parameter readjustment to improve the accuracy of the instructions.
3. Compressed air vortex flowmeter vortex generator vortex surface buildup of the impact of the flow surface
If there are viscous particles in the measured fluid, they may gradually accumulate on the flow surface of the vortex generator, changing its geometry and size, and thus the flow coefficient changes accordingly, so it is necessary to pay attention to cleaning in use.
4. Problems with installation
Installation issues are mainly compressed air vortex flowmeter sensor in front of the length of the straight pipe section, if the length is not enough to affect the measurement accuracy.
5. Reasons for the direction of parameterization
Errors in product parameters lead to errors in meter indication. Parameter error makes the secondary instrument fullness frequency calculation error, fullness frequency is similar to make the indication of long-term inaccuracy, the actual fullness frequency is greater than the calculated fullness frequency makes the indication of a wide range of fluctuations, can not be read, and the inconsistency of the parameters on the data affects the parameter of the finalization of the final determination of the parameters, and ultimately, through the re-calibration combined with the parameters of the inter-comparison to determine the solution to this kind of problem.
In practical applications, the measurement accuracy of Meacon compressed air vortex flow meters may be affected by a variety of factors. Therefore, when selecting and using the meter, it is necessary to consider various factors and weigh them according to the actual needs. At the same time, you need to pay close attention to the measurement results of the meter in the process of use, and find and deal with abnormalities in a timely manner to ensure the accuracy and reliability of the measurement results.
Meacon compressed air vortex flowmeter measurement accuracy is affected by a variety of factors, but through the selection of appropriate instrumentation, correct installation and commissioning, regular calibration and maintenance, and pay attention to the use of the environment and other methods, you can improve the accuracy of its measurement and meet the actual needs.
