Flow meter verification experiment report| Changdu Ultrasonic Flow Meter Manufacturer

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1. Vortex flowmeter | Technical points

The technical points of vortex flowmeter mainly include accuracy, repeatability, sensitivity, response time, zero drift, and range drift. The specific content is as follows: Accuracy: Accuracy, also known as precision, refers to the degree to which the measurement results of vortex flowmeter are close to the true value. Generally expressed as absolute error or relative sensitive bending pants error, absolute error=measured value - true value, relative error=absolute error/true value. Any type of flowmeter cannot accurately measure the true value of the measured parameter during measurement, and can only try to make the measured value as close to the true value as possible. In practical applications, the accurate standard instrument indication value is usually used as the true value of the measured medium. The difference between the indication value of the measuring flowmeter and the indication value of the standard instrument is the measurement error. The smaller the error value, the higher the reliability of the measuring flowmeter. Repeatability: Repeatability refers to the percentage of the difference between each measured value and the average value relative to the maximum scale range when the same vortex flowmeter is used for multiple repeated measurements under unchanged measurement conditions such as pipe diameter, medium flow rate, temperature, and pressure. This is an important indicator of the stability of the vortex flowmeter, which generally needs to be inspected during instrument operation and daily calibration. Sensitivity: Sensitivity refers to the degree of sensitivity measured by a vortex flowmeter. The ratio of the change in output of commonly used vorte

Flow meter verification experiment report

x flowmeters in the industry to the change in the measured parameters that cause these changes. The integrated vortex flowmeter with temperature and pressure compensation function can simultaneously measure temperature, pressure, and flow rate, and the sensitivity of multiple parameters often better reflects the performance of the flowmeter. Response time: When the bridge parameters of the measured medium change, the displayed value of the vortex flowmeter can only be accurately represented after a certain period of time. The time lag between this and the change in the measured parameters is the response time of the vortex flowmeter. Other instruments also have response times, some expressed as time constants, such as thermistor temperature measurement; Some are expressed in terms of damping time, such as measuring resistance with an ammeter. Zero drift and range drift: Zero drift and range drift refer to the percentage change of the average relative to the range after multiple measurements of the confirmed relative zero and maximum range of the vortex flowmeter.

2. How to improve the accuracy of plug-in electromagnetic flow meters?

1、 Accurate selection of electromagnetic flow meters; Firstly, it is necessary to achieve a reasonable selection of the diameter of the plug-in electromagnetic flowmeter sensor: the selection of this indicator will have a decisive impact on the flow velocity of the fluid in the pipeline, and will also have a significant impact on the output potential parameters. Therefore, in the process of selecting an electromagnetic flowmeter, it is not necessarily necessary to use the diameter of the connecting process pipeline as the selection indicator, but should be based on the

Flow meter verification experiment report

1. Vortex flowmeter | Technical points

2. How to improve the accuracy of plug-in electromagnetic flow meters?

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