『Reasonable flow meter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. How to set the range of the flowmeter
The range setting of the flowmeter needs to be carried out according to the following steps: Measure the current when there is no flow: First, measure the output current of the flowmeter in the state of no flow. This is usually to determine the zero point current of the flowmeter, which is generally standard at 4 milliamps for zero flow output. Measure the current values at different flow rates: Next, apply different flow rates to the flowmeter and measure the corresponding output current values. Suggest measuring multiple points to roughly assess the linearity of the flowmeter. A good linearity means that the relationship between the flow cluster and the current is close to a straight line, thereby improving the accuracy of the measurement. Set instrument parameters according to the actual situation: Based on the measured current value, combined with the design parameters and actual parameters of the flowmeter, set the instrument parameters. Due to the possibility that the design parameters may not be completely consistent with the actual parameters, adjustments need to be made according to the actual situation. Pay attention to the accuracy of the measuring range: The nameplate of the flowmeter usually indicates the measuring range, which refers to the flow range that can be measured while ensuring accuracy. Although the flow rate can be measured at the lower limit of the range, the accuracy of the measurement may not be guaranteed. Therefore, when setting the measurement range, it is necessary to consider the actual measurement requirements and precision requirements. In summary, the setting of the flow meter range requires comprehensive consideration of the zero poi
2. Introduction to flow meter selection (1)
Flow meter selection needs to comprehensively consider factors such as response speed, accuracy, anti pollution ability, gas switching function, and service support. The following are specific selection points: response speed: millisecond level response improvement efficiency. Habitual thermal flow meter: response time is second level and needs to be preheated in advance, which is less efficient in scenarios that require rapid measurement.
. Laminar differential pressure flowmeter: With a response time of over 10ms, it is suitable for industries such as semiconductors, new energy, and biomedicine. Millisecond level response can significantly improve production efficiency and product quality, for example, in the etching process of semiconductor manufacturing, fast response can ensure stable gas flow and avoid process fluctuations. High precision measurement: meets the requirements of demanding scenarios. Flow accuracy: reaches ± 0.5% Rd~1% Rd/S.P., higher than most domestic and foreign brands, suitable for scenarios with extremely high precision requirements such as research and development and laboratories. Geometric design and laminar flow elements: Accurate geometric design and laminar flow elements ensure a high degree of agreement between theoretical and experimental values, reducing measurement errors. Wide range: The range can reach 0.5sccm to 5000slpm, which can meet the flow measurement needs of most scenarios without the
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