Health electromagnetic flowmeter electromagnetic flowmeter is an overview of the conducting medium volume flow measurement of induction meter for measuring the conductivity of greater than 5μs / cm conductive liquid volume flow can be widely used in petroleum, chemical, metallurgy, water, etc. Water, water, sewage, and other areas of conductive liquid flow measurement source. The company's integrated (remote) electromagnetic flowmeter using flameproof design and common type of design, flameproof enclosure measures adopted encapsulation compound proof instruments. Ex logo Exdm (ia) ia BT4. Features * No activity and blocking parts inside the measuring tube, no pressure loss. * Measurement is not affected by the density of the liquid, viscosity, temperature, pressure and electrical conductivity changes. * Selection of lining material and the electrode material, has good corrosion resistance and wear resistance. * Low frequency square wave excitation, and live free from all kinds of spurious frequency interference, stable and reliable. * From the fluid direction of the impact, both positive and negative to the installation can be measured accurately. * Backlit LCD character display. Working principle of electromagnetic flowmeter works (see Figure 1) is based on Faraday's law of electromagnetic induction. Namely: conductive liquid movement when cutting the magnetic field lines, perpendicular to the velocity vector and the direction of the magnetic field vector induced electromotive force is generated in a magnetic field, the induced emf is: E = BdV formula: B- magnetic induction (T) d- electrode spacing (m) V- average fluid velocity (m / s) flow rate Q = 3600VF (m3 / h) Where: F- duct cross-sectional area (m2) is: Q = 3600EBd F (m3 / h) for the same Flowmeter d, F, B are fixed values, the flow rate Q (or flow rate V), is proportional to the magnitude of the induced electromotive force E. Thus, as the flow induced electromotive force E Q (or velocity V) is proportional to, after processing operations, are measured instantaneous flow rate and accumulated flow. Technical parameters Measuring range (m / s) accuracy> 0.5 ~ 15 ± 0.5% R; ± 1.0% R 0.1 ~ 0.5 ± 0.005m / s; ± 0.0075m / s Connection: flange connection, flange clamp * Housing protection grade: IP67 * electrode materials: Table 4 * Lining Material: Table 6 * Operating voltage: 220V AC + 10 -15% * Pressure: Table 5 * Medium temperature: see Table 6 * Operating environment: normal working conditions environment Temperature: min size -10 ~ + 60 ℃; Relative humidity: 5% ~ 90%; Power supply: single-phase AC 85 ~ 265V, 45 ~ 63Hz; DC 16 ~ 30V power: the sensor package, less than 15W. Test Reference Conditions Ambient temperature: 20 ℃ ± 2 ℃ Relative Humidity: 45% ~ 85% Power supply voltage: 220 ± 2% Power frequency: 50Hz ± 5% harmonic content of less than 5%. Warm-up time: 30min * ± repeatability error of the measured value of 0.1%. * Current output a) current output signal: fully isolated 0 ~ 10mA / 4 ~ 20mA. b) Load Resistance: 0 ~ 10mA when, 0 ~ 1.5kΩ; during 4 ~ 20mA, 0 ~ 750Ω. C) The basic error: plus ± 10μA basic error in the measurement on the basis of the above. * Frequency Frequency Output: Output frequency limit can be set within 1 ~ 5000Hz. Optically isolated open collector transistor with bidirectional output. External power supply is not greater than 35V, maximum collector current conduction is 250mA. * Pulse output pulse output: output pulse limit up 5000cp / s. Pulse equivalent to 0.01L, 0.1L, 1L, 2L, 5L, 10L, 100L, 1m3, 10m3 and 100m3 each pulse, the pulse width is set to automatic, 5ms, 10ms, 20ms, 50ms, 100ms, 150ms, 200ms, 250ms, 300ms, 350ms and 400ms. With optical isolation transistor open collector output. External power supply is not greater than 35V, maximum collector current conduction is 250mA. * Indicates that the output of the flow meter can measure the positive and negative direction of fluid flow traffic, and can determine the direction of fluid flow. Provisions of the forward flow display output 0V low, reverse fluid flow output with + 12V high. Automatic dual range switching applications, the first range (high range) output + 12V high, the second range (low range) output 0V low. * Alarm output: transistor with two optically isolated open collector alarm output. External power supply is not greater than 35V, maximum collector current conduction is 250mA. Alarm status: Flow limit alarm, lower limit alarm * Serial communication: optional RS232C or RS485 serial communication interface, with lightning protection. HART, Profibus, modbus optional * damping time: 0 ~ 100s (90%) between the sub-file is optional. * Contact input external contact ON (switched on) or OFF (OFF) signal to remotely control the start and stop of the converter internal counter cumulative traffic. Also can play a remote clearing the counter.