XT810 XT810 vortex flowmeter vortex flowmeter is based on Carmen (Karman) vortex principle study of production, mainly for industrial pipe flow measurement of the fluid medium, such as a gas, liquid, vapor and other media. It features a small pressure loss, large measuring range, high accuracy when measuring actual volume flow is almost unaffected by the fluid density, pressure, temperature, viscosity and other parameters. No moving mechanical parts, so high reliability and low maintenance. Long-term stability of the instrument parameters. Vortex uses piezoelectric stress sensors, high reliability, can work within the operating temperature range of -20 ℃ ~ + 250 ℃ for. Standard analog signals, digital pulse signal output, easy and supporting the use of computers and other digital systems, is a more advanced and ideal measuring instruments. Chinese name vortex flowmeter output 4-20mA, 0-10V signal foreign names such as Vortex street flowmeter supply voltage DC24V, AC220V I. Introduction XT810 also known as vortex flowmeters or Karman vortex flowmeter vortex flowmeter. The basis for the developed countries to absorb advanced technology and comprehensive summary of many years of research experience in the production of the well-designed products, and product intelligence, standardization, serialization, universal, production tooling technology to ensure product quality and aesthetics. The product has advanced circuits, micro-power consumption is low, wide turndown ratio, simple structure, small pressure loss, durable, versatile, long life, stability, ease of installation and so on. ◆ two technical indicators measuring medium: gas, liquid, vapor ◆ Connection: Fa Lanka mounted, flange, plug-in specification Falanca ◆ caliber caliber cartridge selection 25,32,50,80,100 ◆ Flanged Select type caliber 100,150,200 ◆ normal flow measurement range velocity measurement range of Reynolds numbers 1.5 × 104 ~ 4 × 106; gas 5 ~ 50m / s; Liquid 0.5 ~ 7m / s normal range of liquid flow measurement of gas flow measurement range shown in Table 2; Steam Flow measurement accuracy range in Table 3 ◆ ◆ 1.0 1.5 measured medium temperature: room temperature -25 ℃ ~ 100 ℃, temperature -25 ℃ ~ 150 ℃ -25 ℃ ~ 250 ℃ ◆ output signal pulse high voltage output signal 8 ~ 10V 0.7 ~ 1.3V ◆ low duty cycle pulse of about 50%, the transmission distance of 100m ◆ remote signal pulse current 4 ~ 20 mA, transmission distance of 1000m ◆ meter Ambient temperature: -25 ℃ ~ + 55 ℃ Humidity: 5 ~ 90% RH50 ℃ ◆ Stainless steel, aluminum ◆ Power DC24V or lithium battery 3.6V ◆ Explosion levels intrinsically safe iaIIbT3-T6, protection class IP65 three works XT810 vortex flowmeter is the application of the principle of Karman vortex street. A flow meter and modern electronic design and manufacturing techniques, the occurrence frequency of the vortex is proportional to the fluid velocity, under certain conditions, conform to the formula: (wherein f: frequency of vortex v: flow rate d: triangle pillar width St: Strouhal number) of the triangular column of fluid vortex generated alternating pressure signal detected by a piezoelectric sensor into electrical signals is amplified by the preamplifier into a standard electrical signal output. VA series vortex flowmeter can be extensive gas (including steam) and liquid volume measurement, connected with flow totalizer and temperature and pressure sensors for quality operations and various parameters. IV. Features a simple structure and solid, no moving parts, high reliability, long-term operation is very reliable. Second, simple installation, and maintenance is very convenient. Third, the sensor is not in direct contact with the measured medium, stable performance and long life. Fourth, the output is proportional to the flow of the pulse signal, no zero drift, high accuracy. Five, wide measuring range, turndown ratio of up to 1:10. Six, the pressure loss is small, low operating costs, meaning more energy-efficient. Within a certain Reynolds number range, the output signal frequency is not affected by the physical properties of the fluid and component variations, only the meter factor related to body shape and size of the vortex, without compensation when measuring the volume of fluid flow, the post-replacement parts in general without re Instrument calibration factor. Wide range of applications, steam, gas and liquid flow can be measured. Test period of two years. XT810 vortex flow sensors inside diameter in the range of 25-300mm (full tube), XT811 plug-in vortex flow sensors inside diameter ranging from 350-1200mm (plug-in), full pipe liquid measurement accuracy of 1%, the measurement of steam accuracy of 1.5% and gas, plug-in measurement accuracy of 2% liquid, steam and gas measurement accuracy of 2.5%, the measured medium temperature of -20 ~ 150 ℃, -40 ~ 250 ℃, + 100 ~ 350 ℃ (tube only type), the output signal voltage pulse for three-wire or three-wire 4-20mA, two-wire 4-20mA. Split five vortex flowmeter installation condition sensor can be installed indoors, can also be installed outdoors. Environmental conditions to meet the requirements. The sensor should be installed in horizontal, vertical or inclined (bottom-up flow of fluid) on its nominal diameter corresponding pipe. Sensors should be avoided in the pipeline mechanical vibration. When vibration is inevitable, should be considered from the sensor at the front and rear support frame plus fixed straight pipe at about 2DN. Sensors should be avoided in a strong electromagnetic interference, heat radiation, corrosive gases, small space and maintenance inconvenient places. Higher than the measured medium containing impurities, should straight pipe upstream of the sensor installation of filters required length. On the sensor, you should configure the downstream straight pipe length, the inner wall of the straight pipe should be clean, smooth, no punch, fouling and from the skin and so on. Its length should be consistent with the requirements of Figure II. Within the vicinity of the liquid sensor pipe installation, should be filled with liquid to be measured. Straight pipe inner diameter as consistent as possible with the sensor path, if not identical, should be used a slightly larger diameter than the diameter of the sensor, the error must ≤3% and not more than 5mm. VI. Wiring instructions XT810 vortex flowmeter for three-wire system: power, signal, power ground. Three-wire shielded cable. One end of the shield wire in the sensor housing land. Shall not be terminated in the second instrument earth. Respectively, then the three core power, signal, (Ω) power ground. For two-wire transmitter: the two-core cable, vortex, "+", "-" terminals connected to + 24V and test instrument signal input "+" side, the signal "-" 24VDC "-" end of the link, the loop output 4 ~ 20mA.