Electromagnetic flowmeter flange type integrated dual power supply (round straight stainless steel intelligent converter)

Overview.

LD series electromagnetic flowmeter is composed of two parts: sensor and converter. Belongs to the velocity flow meter, it is based on Faraday's law of electromagnetic induction work, used to measure the conductivity greater than 5uS/cm conductive liquid volume flow, is an inductive instrument for measuring the volume flow of conductive media. In addition to measuring the volume flow of general conductive liquids, it can also be used to measure the volume flow of strong acids, strong alkalis and other strong corrosive liquids and mud, slurry, pulp and other uniform liquid-solid two-phase suspended liquids. Widely used in petroleum, chemical, metallurgy, light textile, paper, environmental protection, food and other industrial sectors and municipal management, water conservancy construction, river dredging and other fields of flow measurement.

◆Product implementation standard: JB/T9248-2015 (industry standard)

◆General standard of flange: GB/T9119-2010 (national standard)

                         GB/T9115.1-2010 (national standard with neck flange ≥ DN700mm)

◆Type approval certificate: 2009F384-33 2005F271-33 2007F148-33

Working principle.

According to Faraday electromagnetic induction principle, a pair of detecting electrodes are installed on the wall of the pipe perpendicular to the axis of the measuring tube and the magnetic force line, when the conductive liquid moves along the axis of the measuring tube, the conductive liquid cuts the magnetic force line to produce the induced potential, this induced potential is detected by the two detecting electrodes, the value size is proportional to the flow as

E = KBVD formula: E - induced potential: D - electrode spacing; (measuring tube diameter) B - magnetic induction strength: V - the average flow rate of conductive liquid; K - with the magnetic field distribution and axial length of the relevant coefficient.

The sensor takes the induced potential E as the flow signal, transmits it to the converter, and after amplification, conversion filter and a series of digital processing, displays the instantaneous flow rate and the accumulated flow rate by dot matrix LCD with backlight. The converter has 4~20mA output, upper and lower limit alarm output and frequency/pulse output, and is equipped with RS-485 and other communication interfaces, Hart protocol.

Features.

1. No flow blocking parts in the measuring tube, the pressure loss is zero, not easy to block.

2. As long as the reasonable choice of electrode and lining materials, you can achieve the requirements of corrosion resistance, wear resistance, temperature resistance.

3. The measurement result is basically independent of the physical parameters such as pressure, temperature, density, viscosity and conductivity of the liquid (not less than the minimum conductivity), and is not affected by the environment, so the measurement accuracy is high, stable and reliable.

4. Using modern analog signal conversion technology and high-performance super large-scale integrated chip, the signal is isolated, filtered, amplified and digitally processed. Accurate display of measurement results.

5. Automatic monitoring and correction of parameters affecting the measurement results, such as zero drift correction, and the setting and correction of segmented flow coefficients for the full range, thus expanding the measurement range, improving the degree of intelligence and measurement accuracy, and greatly improving the stability performance.

6. With the measured value of power failure protection and over-range alarm function, the flow direction of the fluid in the sensor can be set, so the sensor installation is not limited by the direction of liquid flow, and can achieve two-way flow measurement.

7. With backlight dot matrix double-row flow display, while displaying the instantaneous flow, cumulative flow, and can display the working status, parameters, measurement units, etc.

8. electromagnetic flowmeter range wide (maximum flow / minimum flow), the normal range of 20:1, generally 30:1 or greater.

9. Instrument configuration with a variety of output functions, can be used with computers, unit combination instrumentation, can complete the requirements of printing, communication and networking.

大口径表面较多用于给排水，中小口径常用于非均相双相同难料流体或高需求场地，小口径、细微规格常用于医药业、食品产业、生物技术等有清洁要求的场地。流量计公司分析：电磁流量计选型表明正确地选用电磁流量计是保证用好电磁流量计的前提条件。选用啥种类的电磁流量计应依据待测流体物质的物理特性和化学性质来决定，使电磁流量计的管径，流量范围，布料材料，电级材料和输出电流等，都能适应待测流体的特性和性质和流量的需求。

可丈量的流体:由电磁流量计的作业原理可知，能选用电磁流量计丈量流量的流体有必要是导电的，超声波明渠流量计厂家提醒：除了高温流体之外，只需导电率超过5μ/cm的任何流体都选用相应的电磁流量计来丈量流量，因此不导电的气体，蒸气，油类，二甲苯等物质不能选用电磁流量计来丈量流量。