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1. Wiring Instructions for Vortex Flow Meter
The vortex flow meter sensor adopts a three line inspection system: power supply, signal, and power ground. Use three core shielded cables. The shielded wire is connected to the housing ground at one end of the sensor. Do not connect the secondary instrument terminal to the ground. Connect the three cores to the power supply, signal, and ground of the monitoring (Ω) power supply respectively. The transmitter shown in Figure 10 is a two-wire system: using a two core cable, the "+" and "-" terminals of the vortex street are respectively connected to the+24V and test instrument signal input "Sui Qiao+" terminal, and the signal "-" terminal is connected to the 24VDC "-" terminal. The output of this circuit is 4-20mA. See Figure 11
2. Pipeline flowmeter
3. Why is there only 24V
vortex street power supply? Vortex street flowmeter is a type of transmitter, and transmitters mainly include temperature, pressure, flow rate, liquid level, etc; In addition to the interference reasons mentioned by Lead Xian upstairs, there are several other reasons:
1. Transmitter instruments nee
2. The vortex flowmeter itself does not require too high power, a two-wire system is sufficient, and it can also be equipped with HART protocol, which means that two wires can have 24V+4~20mA+HART.
. (Recommend a product) http://www.bjzrzc.com/products/h880.htm For reference)3. In fact, vortex flowmeters are also powered by a 3.6V ER14505 battery, which is different from 24V applications.
4、 The transmitter is powered by 220V, and there are two main possibilities:
1. Special on-site requirements or user customization;
2、 For instruments with high power consumption such as electromagnetic flowmeters, it is not meaningful to use 24V (a 24V power supply can only carry a few instruments and the circuit voltage drop is too large). 5. For two-wire vortex flowmeters, 24V power supply actually refers to 10V~30V or 12~32V, depending on the manufacturer