First, the LDE electromagnetic flowmeter debugging period fault usually occurs during the initial installation and commissioning of the instrument. Once the instrument is improved, the electromagnetic flowmeter fault can be eliminated. Caused by electromagnetic flowmeter debugging common faults are improper installation, external environmental interference, fluid characteristics. 1. Fluid piping systems and instrumentation.
Such failures are generally caused by improper installation of the sensor. For example, the sensor is installed at the high point of the industrial pipe network where gas is likely to accumulate. The liquid is directly discharged into the atmosphere through the flow sensor, forming a non-full pipe phenomenon inside the measuring pipe. The sensor is mounted on the fluid itself. On the up and down vertical pipes, it is easy to form emptying.
2. LDE electromagnetic flowmeter environmental aspects of the external environment caused by the failure of the instrument is mostly due to external electromagnetic waves, motor magnetic fields, stray currents and other interference caused. External electromagnetic interference is mainly introduced by signal cables, and usually single- or multi-layer shielding is used for protection. Current interference is usually taken with good individual ground protection to obtain satisfactory measurements.
3.LDE electromagnetic flowmeter fluid The tiny air bubbles in the fluid can not affect the normal electromagnetic flowmeter measurement in general, but the measured fluid volume flow is the sum of fluid and gas. The increase of microbubbles in the fluid will cause the output signal of the flowmeter to change. If the microbubbles in the fluid increase to cover the entire surface of the electrode, the electrode signal loop will be instantaneously disconnected, so that the measured output signal will be relatively large. Variety.
Second, LDE electromagnetic flowmeter failure during the operation of the electromagnetic flowmeter caused the failure of the general cause of fouling of the inner wall of the electromagnetic flow sensor, the instrument case of lightning, the flowmeter to measure changes in environmental conditions.
1. LDE electromagnetic flowmeter inner wall adhesion layer Most of the fluids measured by the electromagnetic flowmeter contain suspended solids or dirty bodies. The frequency of the electromagnetic flow sensor inner wall adhesion layer is higher, if the conductivity of the adhesion layer and the liquid are close to each other The instrument can still perform normal signal output, but only changes the flow area of ​​the fluid, which will lead to the invisible failure of the measurement error; if the adhesion layer is high conductivity, the potential between the electrodes of the electromagnetic flow sensor is easy to short circuit; if the adhesion layer is insulating, The surface of the electromagnetic flow sensor electrode is insulated to disconnect the measurement circuit. The latter two phenomena require cleaning the adhesive layer or replacing the sensor to make the instrument work properly.
2.LDE electromagnetic flowmeter lightning strike circuit will produce a very high voltage and surge current when lightning strikes. The instrument is easily damaged after being struck by lightning. Lightning strikes enter the instrument in three main ways: the instrument power line, the excitation and flow signal lines between the transducer and the sensor. From the analysis of instrument components damaged during a lightning fault, most of the lightning strikes into the instrument through the control room's power line lead to a failure, while the other two approaches are less.
Knowing when it is prone to failure, it can cause relevant attention during routine installation and use, which can effectively prevent the abnormal use of the flowmeter and bring convenience to daily production.
Product advantages:
1. 100% fresh aluminum alloy 6063-T5, iron containing is less than 2% , sturdy and durable, full thickness 3.0mm.
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3. 100% fresh virgin Bayer Polycarbonate Sheet, 30-50 micron anti-UV coating, can withstand 75% ultraviolet light, impact strength is 300 times that of ordinary glass, 10 years warranty.
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6. High anti-aluminum structure provides maximum safety even in strong winds (strongest 12 winds) (34m / s strong wind).
Novel structure and easy installation
7. Packaging, protecting the product during shipping and making it easier to install.
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