LDG electromagnetic flowmeter installation precautions

The main components of the LDG electromagnetic flowmeter sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell. It is mainly used to measure the volume flow rate in conductive liquids and slurries in closed pipes. Including highly corrosive liquids such as acids, alkalis, and salts. This product is widely used in petroleum, chemical, metallurgy, textile, food, pharmaceutical, paper and other industries as well as environmental protection, municipal management, water conservancy construction and other fields. The core of the electromagnetic flowmeter converter adopts a high-speed central processing unit. The calculation speed is very fast, the accuracy is high, and the measurement performance is reliable. The input impedance of the converter circuit is as high as 1015 ohms, the common mode rejection ratio is better than 100db, the external interference and 60Hz/50Hz interference suppression capability is better than 90db, and it can measure the flow rate of fluid media with lower conductivity. The sensor uses non-uniform magnetic field technology and a special magnetic circuit structure. The magnetic field is stable and reliable, and it greatly reduces the volume, reduces repetition, and makes the flow meter small and flow-friendly.

The following ten points should be paid attention to when installing the LDG electromagnetic flowmeter: 1. Select the location and position of the intelligent electromagnetic flowmeter to be installed as needed, but the electrode axis must be roughly in the horizontal direction; 2. Pay attention to the flow on the flowmeter The direction is consistent with the actual flow direction of the fluid; 3. The measuring tube must be completely filled with medium at all times. Only when the tube is full can accurate measurements be obtained. For partially filled tubes, an installation method similar to that of a discharge valve should be used. Do not Install it at the lowest point to prevent solid accumulation. In addition, to prevent the generation of vacuum, avoid installing the sensor at the inlet end of the pump; 4. When installing, ensure there is enough space near the pipe flange; 5. The pipes on both sides of the flow meter should be firmly supported and should not be installed in places with strong vibrations; 6. In order to facilitate installation, for large-size instruments with DN>200, telescopic tubes can be used to allow the axial displacement of the butt flange; 7. Measured from the electrode axis, the length of the shortest straight pipe section upstream is 5DN, and the length of the shortest straight pipe section downstream is 2DN (DN is the inner diameter of the pipe); 8. For split-type intelligent electromagnetic flowmeters, the signal converter (and power increase (converter); install it as close as possible to the sensor. The connecting wire should use shielded cable, which is a double-shielded cable. Do not expose the signal converter (or power amplifier) ​​directly to the sun. If necessary, a sun shield can be installed. cover; 9. For the vortex or spiral flow of fluid, the upper and lower straight pipe sections should be lengthened and flow straighteners should be installed; 10. In order to make the instrument work reliably, improve the measurement accuracy, and not be interfered by external parasitic potentials, the sensor should There is a good independent grounding wire, and the grounding resistance is <10Ω.