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『Two wire system 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. The difference between the two-line and four line fire protection systems is the wiring method and suitability for various scenarios. The advantage of the two-wire system is that it is easy to connect, and only two wires need to be laid to start and communicate with the lamp, saving cable and labor costs. However, the two-wire system is only suitable for low-power primary sensors such as pressure sensors, differential pressure sensors, temperature sensors, capacitive level gauges, RF admittance sensors, vortex flowmeters, etc. Due to the fact that the sensor itself is powered by a two-wire system, it will affect its load-bearing capacity. In contrast, the four wire system separates the power supply and power, making it suitable for high-power sensors such as ultrasonic sensors. Because it emits high-power signals to enhance anti-interference ability, ultrasonic sensors usually choose the four wire system. The second-line system performs weakly in this situation, so it cannot be used. The four line system has a large carrying capacity and stable signal, and is widely used in large-scale infrastructure projects such as airports, stations, hospitals, schools, and other public places. Although there is no significant difference in communication capabilities between the two-line and four line systems, the two-line system has more advantages in terms of economy, while the four line system performs better in terms of reliability. When choosing fire-fighting facilities, one should not only consider immediate benefits, but also primarily consider the stability of the equipment. After comprehensive evaluation of economy, stability, and post maintenance needs, the two line and four line schemes each have their own applicable
2. Pipeline flowmeter
3. The influence of vortex flowmeter
The output of the two-wire (4-20) mA signal is transmitted to other devices using a two-wire system, requiring a power supply of 24V ± 10%, and the maximum load resistance of the output circuit is 600 Ω (including the resistance of the cable).
. Generally, 600VPVC insulated wires or cables are used for connecting wires; In sites susceptible to electrical noise interference, a two core shielded wire (RWP2 × 0.5mm) should be used, and the shielding layer should be reliably connected to the grounding screw inside the amplification spring plum box. The temperature of the vortex flowmeter has little effect on the amplifier. When used to measure high-temperature liquids or when frequent pipeline cleaning is required, the sensor can be inverted. On pipelines with insulation layers, do not use insulation materials to surround the connecting rod of the sensor connected to the amplifier box, at most not exceeding one-third of the height of the connecting rod. The sensor housing can be wrapped with insulation material. Vortex flow meters should be avoided from installation on very long overhead pipelines, as the sagging e