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1. Could someone please explain in detail the starting flow rate issue of the flowmeter? The more detailed the better.
The vortex flowmeter is a flow measurement instrument designed based on the Karman vortex principle, suitable for measuring the volumetric flow rate of gases, liquids, and vapors, as well as the volumetric flow rate or mass flow rate under standard conditions.. Its measuring medium includes but is not limited to gas, liquid, and vapor, with various connection methods including flange clamping, flange, and insertion, and a wide range of caliber options. The measurement range of the vortex flow sliding pin gauge is wide and suitable for fluids with Reynolds numbers between 1.5 × 104 and 4 × 106. For gases, the measurement range is 5-50m/s; The measurement range for liquids is 0.5-7m/s. In addition, the measurement accuracy of vortex flowmeter is divided into 1.0 level and 1.5 level, and it is believed that the temperature range of the measured medium covers normal temperature -25 ℃~100 ℃, high temperature -25 ℃~150 ℃ or -25 ℃~250 ℃. This flowmeter has two output modes: pulse voltage output signal and pulse current remote transmission signal. The high level of the pulse voltage output signal is 8-10V, the low level is 0.7-1.3V, the pulse duty cycle is about 50%, and the transmission distance can reach 100 meters. The pulse current remote transmission signal is 4-20 mA, with a transmission distance of 1000 meters. The working environment requirements for vortex flowmeters are relatively tolerant, with a temperature range of -25 ℃ to+55 ℃ and humidity of 5-90% RH below 50 ℃. The material selection of vortex flowmeter is diverse, including stainless steel and aluminum alloy. The power supply i
2. What should I pay attention to when installing the Cummins VFM60 vortex flowmeter that I purchased?
1) The flow direction of the measured medium must be consistent with the flow arrow mark on the flow meter body. 2) The detection amplifier and flowmeter are carefully matched according to the measurement range and nominal diameter, and cannot be interchanged. When installing a card mounted flow rate, a dedicated concave surface can be used to ensure that the pipeline and flow meter are concentric with the flow bending body, and attention should be paid to the sealing gasket not penetrating deep into the pipe. 3) The inner diameter of the pipeline for installing the flowmeter must be consistent with the inner diameter of the flowmeter. Generally, the error between the inner diameter of the pipeline and the inner diameter of the vortex flowmeter body should be ≤ 2%, otherwise the pipeline should be re routed. 4) The inner diameter of the sealing gaskets on both sides of the vortex flowmeter must be consistent with the inner diameter of the flowmeter, and it is strictly prohibited to use gaskets smaller than the inner diameter of the flowmeter. When installing the flange connected vortex flowmeter, it is necessary to prevent the gasket parts on both sides from entering the pipeline, otherwise the Luma J