『Parameter tuning of vortex flowmeter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. How to determine the boundary flow rate of vortex flowmeter? The boundary flow rate of vortex flowmeter needs to be determined by considering the characteristics of the instrument and the actual working conditions. 1. Determine the boundary flow rate based on the characteristics of the instrument. ① Refer to the parameter table provided by the manufacturer of the garment bending instrument manual, which will indicate the boundary flow rate value for a specific model. For example, if a certain model is clearly marked with a boundary point of 5m ³/minute. These data have undergone fluid mechanics testing and flow calibration experiments, demonstrating reliability for on-site applications. ② Compared to 1.0 grade products, instruments with a matching accuracy level of 0.5 typically have a lower measurement limit of about 30% -40%. High precision sensors can capture weak vortex signals at low flow rates through more sensitive piezoelectric elements, thereby expanding the effective range. 2. Adjust the boundary flow rate based on actual working conditions. ① When measuring diesel, it is recommended to increase the boundary flow rate by 15% -20% compared to water medium, as its viscosity reaches 3-8cP, which will delay the formation of vortex streets. The collapse of high viscosity media such as crude oil (viscosity>50cP) requires specially designed boundary parameters. ② Optimization of pipeline adaptation requires a 20% -30% increase in boundary flow rate for diameters above DN200 to ensure flow field stability. When there are disturbance sources such as elbows and valves, it is recommended to increase the safety factor by 1.2-1.5 times on the basis of the conventional boundary value to prevent detection failure cause
2. How to adjust inaccurate vortex flowmeter
The measurement of inaccurate vortex flowmeter needs to be systematically investigated and adjusted from three aspects: installation conditions, parameter settings, and interference elimination.
1 Installation condition inspection: Installation problems are the most common cause of measurement errors and need to be focused on: • Straight pipe section requirements: Ensure that there is a straight pipe section upstream of the flowmeter with a diameter of 10-40 times the diameter, and a straight pipe section downstream with a diameter of 5 times the diameter, to avoid interference from flow elements such as elbows and valves affecting the flow field • Full pipe status confirmation: Check whether there is gas-liquid two-phase flow or incomplete pipe in the pipeline, and the installation position should avoid the highest point of the pipeline to prevent gas accumulation • Sensor centering installation: Check whether the probe is aligned with the centerline of the pipeline and whether the sealing gasket is offset, causing changes in the flow area. 2 Parameter setting calibration • Instrument coefficient verification: Re enter the instrument coefficient (unit: pulse number/cubic meter) marked on the nameplate into the converter. Incorrect coefficient will cause linear deviation • Medium parameter setting: Re enter the actual medium density (kg/m ³) and viscosity (cP), and steam medium needs to compensate for temperature and pressure parameters • Range setting: Check whether the upper and lower limits of the range cover the actual flow range. It is generally recommended that the working flow rate be between 30% and 70% of the f
Hot Blog
Related AD
