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The principle of the principle of the electromagnetic flowmeter is true

Electromagnetic flowmeter caliber
(1) The diameter of the selection sensor is the same as the diameter of the connected process pipe. This selection device is inconvenient and does not require a reducer, but it is based on the fact that the flow rate within the tube should be in the range of 0.2 m/s to 10 m/s. This kind of choice is rarely used in this situation. The new project has just been dismantled and the flow rate is at a low level. After the current period of work, the flow rate in the pipe is at a high level. Only when the meter is full-scale, the instrument can be adapted. Change the meter.
(2) The diameter of the selection sensor is not the same as the diameter of the connected process pipe. This choice is used in the following situations: A. The flow rate in the pipe is low, and the process flow is relatively stable, so that the meter is satisfied with the flow rate scale. In some parts, the flow rate is improved, and the diameter of the selection sensor is smaller than the diameter of the process piping, and the different diameter pipe is added before and after the sensor. B considers the price. Regarding the large-caliber electromagnetic flowmeter, the larger the diameter, the higher the price. Regarding the condition that the flow rate in the pipeline is low and the process parameters are stable, a sensor with a small diameter can be selected, which not only enables the instrument to operate under a better task condition, but also reduces the investment cost of the instrument.

Electromagnetic flowmeter and converter connection considerations
l) When measuring the mixed phase liquid, the choice does not cause the phase separation; when measuring the two-component liquid, it is prevented from being installed in the upstream which is not evenly mixed; when measuring the chemical reflection pipeline, it should be installed upstream of the reflection of the sufficient realization section;
2) It is possible to prevent the measuring tube from becoming a negative pressure;
3) When the vibration is small, the special pair of integrated instruments;
4) Prevent large motors and large transformers from being near to the left, so as not to cause electromagnetic field disturbance;
5) It is easy to realize the occasion where the sensor is grounded alone;
6) Try to avoid high concentrations of aggressive gases in the surrounding environment;
7) The ambient temperature is within the range of 25 / 10 10 50 / 60 °C, and the integral structure temperature is also subject to electronic components, and the scale is narrower;
8) The absolute humidity of the environment is within the range of 10% to 90%;
9) Try to prevent direct sunlight;
10) Prevent rainwater from immersing and will not be immersed in water. If the degree of protection is IP67 (dust-proof and flood-proof) or IP68 (dust-proof and dive-proof), then the above 8), 10) requests are not required.

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