2.2 converter circuit structure 















 Figure two shows the converter circuit structure 
 Electromagnetic flow converter on the one hand to provide a stable excitation current to the electromagnetic flow sensor excitation coil, in order to achieve B is a constant; induction of electromotive force of the sensor amplification, converted into a standard current signal or frequency signals to facilitate traffic control and regulation. Figure two shows the structure of the converter circuit. 
 Third, the product type and composition 
 3.1 The product composition 
 The electromagnetic flowmeter is composed by two parts of the electromagnetic flow converter and electromagnetic flow sensor, separate type also need a special double shielded cable to connect the conversion and sensors. 
 3.2 The product type 
 The electromagnetic flowmeter into one body, split, plug-in structure, can be specially tailored, high-voltage type according to customer demand, the special form of the sanitary clamp connection, threaded connection. Can be used in place of the provisions of the proof, different degrees of protection. 
 The sensor has seven kinds of electrodes of different materials and four kinds of different materials lining are available. 
 Fourth, technical indicators, indicators on technology in Table 1 
 Execution standard JJG1033 2007 
 Measurement of media conductivity liquid 
 Accuracy class 0.5% 
 Repeatability of 0.15%, 0.25% 
 Fluid temperature -25 ~ +180 ° C 
 Rated pressure 
 (Special pressure levels need to be customized) nominal diameter nominal pressure rating 
 DN25-DN150 4.0MPa 
 Of DN200-DN600 1.6MPa 
 DN700-DN1200 1.0MPa 
 DN1400-DN2000 0.6MPa 
 DN2200-DN3200 0.25MPa 
 Medium flow rate range of 0.3-12m / s 
 Conductivity ≥ 5uS/cm 
 Electrode material of 316L stainless steel, Hastelloy B, Hastelloy C, 
 Tantalum, titanium, platinum, tungsten carbide, nickel, etc. 
 Lining material fluorine-polybutadiene rubber CR, the F4 polytetrafluoroethylene (PTFE) 
 Polyurethane rubber, alumina ceramic 
 Table body flange material 20 # carbon steel, 304 stainless steel, other materials (special order) 
 Installation flange connection type Fa Lanka mounted, clamp connection 
 Degree of protection IP65, IP67, IP68 
 Converter power supply 220V +20% of power supply of 24VDC two kinds to choose from 
 Pulse signal output, frequency output, 4-20mA current signal output, choose the output function of the HART communication protocol, MODBUS protocol, RS485/232 protocol 
 Structure type, sub-size (with a standard 10m cable), plug-in 
 Power consumption of 0.65W 
 Working environment temperature: -25 to +60 ° C, humidity: 5% ~ 90% 
 Explosion levels are not explosion-proof and explosion-proof Exdeibmb ll CT 3-T6 
 Damping time 1-50S sub-file optional 
 V. Product Dimensions and mounting dimensions 
 5.1 converter Dimension, as shown in Figure 3, Figure four. 












 Figure three circular shell-in-one Dimensions Figure 











 Figure Quartet shell-in-one Dimensions Figure 

 5.2 Sensor sizes and mounting dimensions, as shown in Figure 5, Table 2. 










 Five DN10-DN800 pipe-stage electromagnetic flowmeter outline 
 Nominal diameter 
 Unit: mm instrument