EMFM-HFD3000 electromagnetic flowmeter

EMFM-HFD3000 electromagnetic flowmeter

Overview of EMFM-HFD3000 electromagnetic flowmeter

In general, the common flowmeter used by electromagnetic flowmeter to measure conductive water is one of the products with high utilization rate. Electromagnetic flowmeter can measure sewage. It is suitable for highly corrosive media.
In industry and production, in order to calculate various data, the data of flow is often indispensable, so the use of flowmeter is indispensable. Because the flowmeter has a wide range of applications and different measurement conditions, there are many kinds of media that can be measured, including various liquids, gases and steam. In daily working conditions, if you need to select instruments and equipment, you can start with the measured medium, working temperature, pressure and other factors. Only in this way can the selected instruments and equipment be more conducive to the measurement of medium.

Features of EMFM-HFD3000 electromagnetic flowmeter
(1) Range ratio the range ratio of electromagnetic water meter is about 400
(2) Lower limit of flow measurement. The measurement lower limit of electromagnetic water meter should be 30mm / s, and the higher requirement is 20mm / s.
(3) Power consumption. Most domestic water metering applications are difficult to access the power grid, so the electromagnetic water meter is generally powered by battery. This requires that the electromagnetic water meter must greatly reduce the power consumption. In order to reduce the power consumption, the excitation current of the electromagnetic water meter is generally reduced to 20 ~ 40mA, which is much lower than the excitation current of the electromagnetic flowmeter in flow measurement.
(4) The sensor signal is weak. Compared with the ordinary electromagnetic flowmeter, the electromagnetic water meter has a small excitation current, resulting in a small amplitude of the original signal of the sensor, and the lower limit of the measurement of the electromagnetic water meter is much lower than that of the ordinary electromagnetic flowmeter, which leads to a very weak signal in the small flow measurement of the electromagnetic water meter and is greatly affected by the interference in the small flow measurement. Therefore, it is difficult to measure small flow rate stably and accurately.

Materials of electrodes for EMFM-HFD3000 electromagnetic flowmeter

Confirmation of measuring range for EMFM-HFD3000 electromagnetic flowmeter

Generally for electromagnetic flow meter used in industry the flow velocity of measured medium should be 2〜4m/s. Under special conditions the minimum flow rate should be not less than 0.3m/s, and the maximum should be not more than 8m/s. If the medium includes solid granules, the usual flow rate should be less than 3m/s to prevent the liner and electrodes from excessively rubbing. To those viscous liquid, the flow rate should be more than 2m/s. The bigger flow rate is conducive to automatically eliminating the role of viscid substances apposed on the electrodes and advancing the accuracy. Under the condition that the span Q is defined, diameter D of flow meter can be decided according to the above flow velocity V, and the value is counted according to the following formula:

Span Q of electromagnetic flow meter should be more than anticipated max value of flow rate. While the normal value of flow rate should be slightly more than 50% of full scale of the span of flow meters.

Classification of Products for EMFM-HFD3000 electromagnetic flowmeter

Series smart electromagnetic flow meters consist of sensor and smart signal transducer.

And it can be classified into two structures- integral type and remote type according to the set-up form of the sensor and transducer. In terms of integral type electromagnetic flow meters, transducer and sensor directly assembles as a whole and cannot be dissociated.

It is usually used at the scene where the environmental situation is good.

To remote type electromagnetic flow meters transducer composes a product through a special electric cable and sensor.

The sensor is installed at the scene and the transducer is installed in the place where the conditions are good. It is usually used at the scene where the environmental situation is poor, such as underground wells, high temperature and the place where people cannot reach.