Plastic tube flowmeter

『Plastic tube 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. Explain the installation requirements for electromagnetic flow meters. The installation requirements for electromagnetic flow meters mainly include the following aspects: installation direction and full pipe conditions. The installation direction of the transmitter is flexible and can be vertical, horizontal, or inclined, but it must be ensured that the inside of the measuring conduit is always filled with liquid (full pipe condition). When installed vertically, the liquid should flow through the instrument from bottom to top; When installed horizontally, the two electrodes should be in the same horizontal plane, and the axial direction of the electrodes should avoid the sedimentation and aggregation area to prevent the deposition of the medium from affecting the measurement accuracy. Requirements for straight pipe section: There should be a straight pipe section with a diameter of not less than 5 times the diameter (5D) on the upstream side. If there are valves or expansion pipes on the upstream side, it should be extended to 10D; the length of the straight pipe section on the downstream side is recommended to be 3D. The shut-off valve should be fully opened. If Yan Yin cannot be fully opened, the valve flow direction should be at a 45 ° angle to the electrode axis; The regulating valve must be installed on the downstream side; The cone angle of the expanded tube should be less than 15 ° to reduce the influence of fluid disturbance on the measurement. Environment and interference avoidance: It is necessary to stay away from strong magnetic field sources (such as high-power motors, transformers, etc.) to avoid external magnetic field interference with the sensor coil magnetic field, which can cause signal distortion; Avoid mechanical vibration and install shock absorbers if necessary; The installation location should avoid drastic temperature changes, high temperature radiation, and corrosive gas environments. If it must be installed outdoors, moisture-proof and sun protection measures should be taken. Electrical connection and grounding: Shielded cables must be used for signal or signal cables, kept away from power cables, with the shortest exposed parts of the two end joints. The length of the stripped shielding layer should be based on the connection terminal, and the shorter the signal line, the better; The converter should be as close as possible to the transmitter; The transmitter and converter must use the same phase power supply to prevent phase differences from causing the instrument to malfunction; The sensor needs to be grounded separately, and the grounding resistance should be less than 4 Ω. When there is no insulation layer on the inner wall of the metal pipeline, it can be directly grounded. Plastic pipelines or pipelines coated with insulation layer need to be equipped with grounding rings or internal grounding electrodes at both ends of the sensor. Process pipeline requirements: The inner diameter of the upstream and downstream process pipes and the inner diameter of the sensor must meet 0.98DN ≤ D ≤ 1.05DN (DN is the inner diameter of the sensor), and the process pipeline and the sensor must be concentric with a coaxial deviation of no more than 0.05DN. The installation position should avoid negative pressure conditions to prevent lining peeling and damage. If it must be installed in a negative pressure environment, it must be ensured that the position is lower than the high point of the pipeline. Consistency be

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