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Does vortex flowmeter need temperature and pressure compensation to measure steam?

Whether the temperature and pressure compensation is required for steam measurement by vortex flowmeter mainly depends on the properties of the steam being measured and the requirements of measurement accuracy.

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For saturated steam:

The density of the saturated steam is directly corresponding to the pressure and temperature of the saturated steam. Therefore, when measuring saturated steam, vortex flowmeters generally only need to carry out one of the pressure compensation or temperature compensation, without carrying out both at the same time. This is because, as long as one of the indicators (temperature or pressure) is measured, the density of the steam can be calculated through the corresponding formula or data table, so as to accurately calculate the flow of steam.

For superheated steam:

The density of superheated steam is closely related to both temperature and pressure. When measuring superheated steam, in order to improve the measurement accuracy, it is usually necessary to install both temperature and pressure compensation. This is because the density of superheated steam will change significantly with changes in temperature and pressure, and without temperature and pressure compensation, the true flow rate of steam will not be accurately calculated.

The realization of temperature and pressure compensation:

Integrated temperature and pressure compensation: Temperature and pressure sensor integrated flow meter operation, measurement and display. This flowmeter in the form of intelligent, with its own temperature and pressure compensation function, the converter can directly measure the volume of the sensor, temperature, flow and pressure signals for conversion and processing, to achieve the goal of one field display.

Split temperature and pressure compensation: a simple vortex sensor, a separate temperature sensor, a separate pressure transmitter and a display instrument flow integrator are combined. This method requires the user to install and configure the sensor and transmitter, and the data processing and display through the flow integrator.

Summary: Whether temperature and pressure compensation is required for steam measurement by vortex flowmeter should be determined according to the nature of the steam under test (saturated steam or superheated steam) and the requirements of measurement accuracy. In the selection of vortex flow meter, the user should choose the appropriate compensation mode and flowmeter model according to the actual demand to ensure the accuracy and reliability of the measurement results.

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