How to improve the measurement accuracy of turbine flowmeter

Turbine flowmeters utilize a brand-new intelligent design, ensuring high-precision measurements. They offer superior performance, a long service life, and strong anti-interference capabilities. While operating, turbine flowmeters may encounter various electromagnetic interferences. Inadequate anti-interference capabilities can affect measurement accuracy. The accuracy of a turbine flowmeter is determined under reference conditions (also known as standard operating conditions). For turbine flowmeters, these reference conditions generally include: environmental conditions (ambient temperature 15°C to 35°C, relative humidity 45% to 75%, atmospheric pressure 86kPa to 108kPa, no electric or magnetic field interference, and no vibration); power source conditions (220V ± 10% or 110V, 50Hz ± 1, or 24VDC); and fluid conditions (when calibrating with fluid, the calibration pipe is an industrial circular pipe, single-phase Newtonian fluid, fully filled, fully developed turbulent velocity axisymmetric distribution, no vortices, no disturbances, and steady flow). The calibration fluid is typically water, oil, or air, selected as needed. There is a sufficient length of straight pipe upstream and downstream of the turbine flowmeter. The fluid temperature is generally room temperature, and the fluid pressure is generally below 0.25MPa). Obviously, the actual operating conditions of a turbine flowmeter often differ from the reference conditions, which can cause changes in the turbine flowmeter's accuracy. 1. Turbine Flowmeter Accuracy - Pay Attention to Instrument Selection
After selecting the flow sensor type, the next step is to select the flow sensor specifications and supporting components. In short, good selection ensures effective use. To this end, two basic principles must be adhered to during the selection process: first, ensuring operational accuracy, and second, ensuring production safety. To achieve this, three selection parameters must be considered: the short-term and long-term maximum, minimum, and commonly used instantaneous flow rates, the design pressure of the measured medium, and the operating pressure.
2. Turbine Flowmeter Accuracy - Pre-use Calibration
On the one hand, considering the current difficulties in on-site calibration of this type of flow sensor. Furthermore, if the purchase intention is to use this flow sensor in a critical metering application, such as high-flow trade measurement or a measurement point with significant metering disputes, and if the site does not have the conditions for online flow calibration, then it would be premature to simply assume that the flow sensor's performance is fully qualified based solely on a factory certificate of conformity provided by the manufacturer at the time of purchase. Therefore, to ensure the reliability and accuracy of the flow sensor's measurement results throughout its operation, it is necessary to send the flow sensor to a qualified and capable department for system calibration over the full flow range before formal installation.

III. Turbine Flowmeter Accuracy - Ensure Proper Process Installation

Although this type of flow sensor does not have many special requirements for process installation and operating environment, all flow measurement instruments share common requirements: minimizing vibration and high-temperature environments that interfere with the flow pattern; maintaining a smooth and flat inner wall of the straight pipe section before and after the flow sensor; and ensuring that the measured fluid is a clean, single-phase fluid.

IV. Turbine Flowmeter Accuracy - Strengthening Post-Operation Management

Although this type of flow sensor features multiple automatic handling functions and low power consumption, it still requires enhanced management after commissioning. For example, to ensure the long-term accuracy and reliability of the flow sensor, regular system calibration, meter reading, media parameter replacement, and periodic battery checks, flow sensor coefficient inspection, and seal inspections are all necessary. V. Turbine Flowmeter Accuracy - Pay Attention to Internal Maintenance
If the flow sensor's measuring chamber and components require regular inspection or cleaning due to air pollution or other reasons, one important point is crucial: for turbine flowmeters of the same specification, core components such as the vortex generator and flow guide body cannot be interchanged. Otherwise, the meter's metering coefficient must be recalibrated, and the temperature and pressure sensors must be systematically calibrated.
Mastering these five points will maximize the effectiveness of turbine flowmeter use and help prevent measurement inaccuracies caused by the instrument itself. This is crucial for manufacturers.