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1. How to calculate the minimum flow rate of an ultrasonic flowmeter within a 400 fold range?
The formula for calculating the minimum flow rate of an ultrasonic flowmeter within a 400 fold range is: minimum flow rate=maximum flow rate ÷ 4001 If the nominal range of the flowmeter is 400:1, the minimum flow rate is directly obtained by dividing the maximum range value by 400. For example: - When the maximum flow rate is 100m ³/h, the most reliable local cluster small flow rate=100 ÷ 400=0.25m ³/h. - When the maximum flow rate is 10L/min, the minimum flow rate sliding cherry=10 ÷ 400=0.025L/min. 2. Key parameter verification - It is necessary to confirm the maximum flow rate value indicated in the equipment manual (such as the commonly used maximum flow rate of 30m ³/h for DN50 pipelines) - In practical applications, the influence of medium type (liquid/gas) and pipeline diameter on the measurement lower limit needs to be considered. 3 Attention - Some manufacturers nominal 400:1 range is under ideal operating conditions (such as pure water, full pipe flow), and the actual minimum flow noise may need to be increased by 1.5-2 times - high viscosity media (such as oil) may reduce the range ratio. It is recommended to calculate conservatively at 200:1
2. What is t
The minimum diameter specification of the water flow meter calibration device varies depending on the device type and manufacturer, and the common minimum diameters are DN10 and DN15.
1. The minimum aperture of typical publicly available devices 1 The standard version water flow standard device of Aisite Instrument (Shanghai) Co., Ltd. can test instrument diameters ranging from DN10 to DN800, with a minimum calibration diameter of DN10
2. The flow calibration device of Mike Sensor Co., Ltd. can meet the production coarse chain calibration of DN15-DN500 caliber flow meters; The volumetric rock jet water flow verification device is suitable for the verification of small and medium-sized equipment ranging from DN15 to DN200, with a minimum calibration diameter of DN15 for both.
3. The flowmeter design specification book generally indicates the maximum flow rate, minimum flow rate, scale flow rate, and scale flow rate ..
The maximum and minimum flow rates usually refer to the maximum and minimum flow rates that the measured medium can achieve when converted to water density. The flow rate of Kesong Chain manuscript usually refers to the range of the measured medium.