Electromagnetic flowmeter installation considerations ( Article 17)

Abstract: the electromagnetic flowmeter installation considerations ( Article 17) Information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Electromagnetic flowmeter 17 key note 1 in engineering application. Transmitter shall be installed in the location of the catheter may at any time is full of liquid measurement, in order to prevent the pointer caused by measuring no liquid in the pipe is not zero. It installed vertically, to reduce the liquid through the electrode production. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the electromagnetic flowmeter installation considerations ( Article 17) The article details. Correct electromagnetic flowmeter installation specification will directly to the normal use of the instrument, measuring race affect and service life, today to sort out 17 installation application conditions, a relatively detailed unscrambles may lead to adverse use of electromagnetic flowmeter installation key points, to help the reader more about the specification of the electromagnetic flowmeter installation, avoid stepping on pit the specification of the installation and maintenance, ensuring the flowmeter. Electromagnetic flowmeter installation application of 17 key points for attention are as follows: 1. Transmitter shall be installed in the location of the catheter may at any time is full of liquid measurement, in order to prevent the pointer caused by measuring no liquid in the pipe is not zero. It installed vertically, to reduce the liquid flow through electrode on the error caused by the bubble. If placed, flowmeter two electrodes must be kept in the same horizontal plane, in order to prevent the pipe at the top of the sediment or air will its insulation. 2. If necessary, can drain pipe, the built-in air traffic detection circuit will stop accumulation and flow of the signal output. 3. For in a fluid flows through the pipe with anodic protection, electromagnetic flow timing installation should pay attention to the following: in order to make the fluid good grounding, grounding ring should be used; When sensors connected to the pipe, flange and should have insulation between the bushing on the screw. 4. When electromagnetic flow meter installed in the path of the grounding metal pipe, through the electromagnetic flow meter transducer on the earthing terminal to realize the potential balance system, namely through the cross-sectional area of not less than 6 was the copper wire connected to the earthing terminal; When the electromagnetic flow meter installed in the path of the grounding of metal two flange by cross-sectional area for at least six was the copper wire and pipe flange connection and grounding; Connect the transmitter or a sensor junction box to the earthing terminal, in order to realize the system potential balance; When the electromagnetic flowmeter is installed on the plastic pipe or pipes with insulating lining, by increasing the ground loop to realize the system potential balance, grounding ring by cross-sectional area for at least six was the copper wire is connected to the earthing terminal. 5. Electromagnetic flow meter should be installed in the indoor dry ventilated place, avoid installation where the ambient temperature is too high, and should not be a strong vibration. Avoid using strong magnetic field equipment, such as large motor and transformer, and avoid install where corrosive gas. Installation location is convenient for maintenance, is to ensure the normal operation of the transmitter of environmental conditions. 6. And the bypass valve shall be installed on both ends of the electromagnetic flow meter. 7. In order to ensure that the electromagnetic flow meter measuring tube full of measured medium, varactor should be installed vertically, from bottom to top flow, especially the liquid-solid two phase flow. If the site only allows horizontal installation, two electrodes must be in the same horizontal plane. 8. Electromagnetic flow meter several millivolt communication potential of the electrode measurement based on the transmitter of fluid potential. To stabilize the fluid potential, keep transmitter and fluid potential, to ensure stable measurement, transmitter connected to both ends of a shell and tube is good, the converter shell can also, grounding resistance should not be more than 10 ohms, cannot be Shared with other electrical equipment grounding line. If unable to ensure good contact between shell and tube in the transmitter, should use wire connection, and then a reliable grounding. 9. The installation position of converter should avoid strong ac and DC magnetic field and vibration. The environment temperature for - 20 ~ 50 ℃, no corrosive gas, relative humidity is not greater than 80%. 10. In order to avoid interference, between transmitter and transducer signal must be shielded wire transmission. Signal cable and power cord does not allow parallel placed in the same cable pipe, signal cable length is generally not more than 30 m. 11. In order to guarantee the normal operation of the electromagnetic flowmeter, reduce the measuring error, straight pipe before and after the electromagnetic flowmeter should satisfy certain requirements. According to JG1033 - 2007 the electromagnetic flowmeter verification regulation of test standards, former straight pipe should be up to 10 d, straight pipe should be reached after 5 d. 12. Installation location. Electromagnetic flow meter can be installed vertically, also can be installed in horizontal, vertical installation, but suggested by current flows from bottom to top. It also can be installed horizontally, but two electrodes should be in the same horizontal plane. Horizontal installation, make sure the measuring tube filled with liquid at any time. When the main line is perpendicular to the pipe, general demand flow from bottom to top, try not to from top to bottom.
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