The magnetic flap level gauge is not right on site and remotely

Structural principle: The production of remote magnetic flap level gauge is composed of five parts: the main body, magnetic float, sensor, transmitter and secondary instrument. The working principle is that the magnetic float in the main body is engaged with the reed switch at the corresponding position in the sensor at the same time as the liquid level rises.

As a result, the total resistance (or voltage) in the sensor changes accordingly, and then the change in resistance (or voltage) is converted into a standard current output of DC4 20mA through the transmitter.

Case example: the customer responded to the 1000mm long magnetic flap level gauge at the scene The on-site magnetic flap indication is normal, but the on-site indication is 800mm, but the remote secondary meter shows only about 350mm, and the signal is only more than 6ma.

Reason analysis: It may be that the corresponding value of 4-20mA and the remote transmission signal of the magnetic flap level gauge is reversed, such as 0mm should be connected to 4mA, 1000mm should be connected to 20mA, if it is reversed, the above phenomenon may occur. Under normal circumstances, if the installation is correct and the wiring is correct, the above phenomenon will not occur.

User feedback: It was good when I first used it, but later the secondary instrument appeared on the scene where the display did not correspond. This on-site problem may occur in the magnetic flap level gauge, internal reed tube failure, or level transmitter failure. Replacing a reed switch or level transmitter should resolve this issue.

The magnetic flap level gauge is inaccurate, the display of the flap column is inaccurate and the output of the remote signal is inaccurate.

If the column is not displayed accurately, it may mean that the float is stuck in the main tube, and you can use a calibration magnet to test the magnet from beginning to end, and it can return to the zero position. If not, the remote signal is not accurate, with a multimeter to measure, maybe the reed switch is broken, the setting of the secondary meter is also re-checked, there may be a problem with the setting in the secondary meter.

To see what the fault is, you must find the cause before you can deal with it. Indicator failure? Float failure? Leak? Wait a minute.

1. There may be a problem with the instrument wiring. For example, the current signal and voltage signal are wrong, or the two-wire system and four-wire system are wrong, or the PV, SP, SV terminals are wrong, and so on. (Most likely).

2. There is a problem with the signal input of the instrument setting, or there is a problem with the range setting. (Possibility second) 3, the level gauge of the transmitter unit is broken.

4. The float of the level gauge is stuck.

Check whether the float in the magnetic flap level gauge can float normally, if the float floats no problem, the remote transmission has no change, it is necessary to check whether there are dead pixels inside the remote transmission and whether the transmitter is faulty.

1. Reduce the magnetic properties of the float.

Since the flip of the magnetic flip is driven by the magnetic attraction of the float, if the magnetism of the float is reduced, the magnetic attraction will be reduced, which is easy to cause abnormal action of the flip, such as making the flip rotate slowly, lag or unable to act.

2. Reduce the magnetism of the magnetic switch.

If this scheme is adopted, the magnetic attraction between the float and the magnetic switch is also reduced, and the force of the float driving the magnetic switch becomes smaller during the lifting process of the float, and the work of the magnetic flap level gauge will not be affected.

3. Increase the rotation angle of the magnetic switch.

Under the action of the magnetic force of the float, the magnetic switch can rotate at a certain angle, but because the magnetic switch is limited by the limit post, the actual rotation angle is very small. After increasing the rotation angle, the magnetic switch magnetic column rotates with the float rising and turns to the limit column, if the force between the float and the magnetic switch magnetic column is very small, then the float will not be subjected to the great force of the magnetic switch.

4. Increase the distance between the float and the magnetic switch.

Since the magnetic attraction increases with the decrease in the distance of the magnetic substance, increasing the distance between the float and the magnetic switch also decreases the magnetic attraction of the float on the magnetic switch. You can add an iron sheet to the magnetic switch of the pontoon, and then install the magnetic switch after thickening to a certain extent, so that the magnetic attraction of the float can just drive the float and this gravitational force is not too large.

When equipped with remote transmission supporting instruments, the following should be done:

1) The remote EasTone telecommunications supporting instrument should be close to the leading pipe of the level gauge and fixed with a stainless steel hoop (iron is prohibited);

2) The sensing surface on the remote EasTone telecommunications supporting instrument should be facing and close to the main pipe;

3) The zero position of the remote transmission supporting instrument should be on the same level as the zero indication of the liquid level gauge;

4) The connection between the remote EasTone telecommunications supporting instrument and the display instrument or industrial computer is best laid through the protective pipe alone or with a shielded two-core cable;

5) After the junction box inlet hole is laid, it is required to be well sealed, so as to avoid the intrusion of rain, moisture and other incursions that make the remote supporting instrument unable to work normally, and the junction box should be covered in time after the maintenance or commissioning is completed.

The precautions for the installation of the magnetic flap level gauge are as follows:

1.Before using the magnetic flap level gauge, the small ball below the zero position should be placed red with the correction magnet, and the other balls should be placed in white;

2.The medium should not contain solid impurities or magnetic substances, so as not to cause jamming to the float;

3.The installation position of the magnetic flap level gauge should avoid or stay away from the inlet and outlet of the material medium, avoid the rapid change of the local area of the material fluid, and affect the accuracy of the liquid level measurement;

4. No magnetic conductive substances are allowed to approach around the magnetic flap level gauge, and iron wire fixation is prohibited, otherwise it will affect the normal operation of the magnetic flap level gauge.

5.According to the situation of the medium, the main pipe should be cleaned from time to time to remove impurities;

6.When debugging, the upper pilot pipe valve should be opened first, and then the lower valve is slowly opened, so that the medium enters the main pipe smoothly, observe whether the magnetic red and white ball flips normally, and then close the lower pilot pipe valve, open the sewage valve, let the liquid level in the main pipe drop, operate three times according to this method, it is indeed normal, and can be put into operation;

7.Open the bottom flange and load the magnetic float (Note: The heavy end has a magnetic end pointing up, and cannot be reversed.) );

8.For the level gauge that exceeds a certain length (3 meters for ordinary type and 2 meters for anti-corrosion type), it is necessary to increase the middle reinforcing flange or ear climbing for fixed support, so as to increase the strength and overcome its own weight;

9.The magnetic flap level gauge must be installed vertically, and the ball valve should be installed between the magnetic flap level gauge and the container lead pipe, which is convenient for overhaul and cleaning;

When the magnetic flap level gauge is equipped with a remote supporting instrument, the following items need to be done:

1.The supporting instrument should be close to the leading pipe of the level gauge, and fixed with stainless steel hoops (iron is prohibited);

2.The induction surface on the supporting instrument should face and be close to the leading pipe;

3.The zero position of the supporting instrument should be on the same horizontal line as the zero indication of the level gauge;

4.The connection between the supporting instrument and the display instrument or the industrial computer is laid separately through the protective pipe or with a shielded two-core cable;

5.After the junction box inlet hole is laid, it is required to be well sealed, so as to avoid the intrusion of rain, moisture and other intrusion of the remote EasTone telecommunication supporting instrument can not work normally, and the junction box should be covered in time after the maintenance or debugging is completed.

(1) The water in the container rises or falls too fast, that is, the float rises or falls too fast, and the magnetic flap does not have time to turn.

2) The center of gravity of the magnetic flap is not at the center point, and when the maglev rises, it flips with the maglev, and when the maglev rises again, the flap returns to its original position state, and does not show the state of water level.

3) There are too many impurities in the water in the container, which are adsorbed on the surface of the magnetic levitation. Cause the magnetic levitation to decrease, and when the magnetic levitation rises, it cannot drive the flap to rotate.

4) The liquid phase conduit of the water is blocked, so that the actual water level in the container rises. The maglev does not rise with it.

Resolution. 1) Try to make the water level in the container rise or fall as much as possible, and it should not be too fast.

2) The water level gauge has a magnetic flap, and the center of gravity is not at the center point. The manufacturing quality is not up to standard and should be replaced.

3) If the water quality is unqualified, it should be flushed regularly.

There may be blockage, or the float shaft is not rotating flexibly, so you can use a magnetic float or magnet to walk through it when it is deactivated.

In the process of daily use, in order to ensure that the magnetic flap level gauge has good performance, attention should be paid to the daily maintenance and maintenance of the magnetic flap level gauge

1) According to the condition of the medium, the main pipe can be cleaned regularly to remove the sediment impurities in the pipe.

2) There should be no solid impurities and magnetic impurities in the cylinder of the level gauge, so as not to cause jamming and weakening of the magnetism of the float.

3) For low-temperature type and liquefied gas special products, the main body of the level gauge adopts vacuum jacket insulation, and pay attention not to destroy the jacket during installation and use, so as not to affect the product quality.

4) After cleaning the level gauge or replacing the float, open the blowdown flange, and when loading the magnetic float, it should be noted that the heavy end with the magnetic end is upward, and it cannot be reversed.

Regular cleaning, when the display is not accurate, you also need to brush the magnet, if you need to pay attention to the false liquid level in the summer, because the medium in the tank will blow up the float due to serious gasification due to temperature. This in turn shows the wrong level gauge. The magnetic flap level gauge can achieve high sealing, leakage prevention and safe and reliable measurement of liquid level under high temperature, high pressure, high viscosity and strong corrosive conditions, the whole process of measurement without blind spots, eye-catching display, intuitive reading, and large measurement range, with liquid level alarm, control switch, can realize the upper and lower limit alarm and control of liquid level or boundary level, with liquid level transmitter can be liquid level.

1.Avoid the inlet to avoid false reflections.

Common problems and faults and precautions of magnetic flap level gauge:

Common problems and faults and precautions of magnetic flap level gauge solve common liquid level problems and failures for you. During on-site calibration, it was occasionally found that the float was not flexible enough to move up and down. This is mostly caused by improper installation, and the magnetic flap level gauge should pay attention to whether the center of the upper and lower flanges is in a line and whether it is perpendicular to the horizontal plane.

Generally speaking, the angle with the horizontal plane should not be less than 87 degrees, if the deviation is large, it may affect the smooth movement of the float.

Many people will ask the question: how to extend the life and safety of the magnetic flap level gauge during use? That's a big deal for a lot of people on this issue.

Some people make maintenance mistakes, which greatly shortens the life of the magnetic flap level gauge, and it is said that the quality of the instrument is poor, which is not objective and unscientific. In order to prolong the service life of the magnetic flap level gauge, I think it is necessary for us to understand the structure of the magnetic flap level gauge. Magnetic flap liquid level gauge is an indicator installed on the outside of the barrel tank or above, to indicate and manipulate a kind of control surface of the liquid level height in the barrel tank, the indicator is made up of a magnetic color sheet, when the magnetic float in the body tube rises with the liquid level, the color sheet flips, can show the liquid level height.

It is also possible to install a magnetic switch or a remote transmitter on the body tube to output a switching signal or an analog signal. It is suitable for high temperature, high pressure, corrosion resistance and other occasions, and can be displayed on the spot and operated for long distances. In fact, the maintenance and protection of the magnetic flap level gauge is secondary, because he rarely needs protection, as long as the device is accurate, it can extend the service life.

So let's get to know how to get it right.

1. The level gauge must be installed vertically to ensure that the float assembly can move up and down freely in the main tube.

2 It is best to install a shut-off valve between the container and the level gauge to clean and overhaul the level timer to cut off the material.

3. No magnets are allowed to be close to the main tube of the level gauge, otherwise the normal operation of the level gauge will be directly affected.

4. After the level gauge is installed, the magnet needs to be corrected, and the turning column is guided once, and the red is displayed below the zero position, and the white is displayed above the zero position.

5. When the liquid level gauge is put into operation, the valve of the lower drain pipe should be opened first, so that the liquid medium can enter the main pipe smoothly, so as to avoid the liquid medium from rising rapidly with the float assembly, and causing the column to flip and fail and turn over randomly. (If this phenomenon occurs, it can be recalibrated with magnets after the liquid level is stable).

6. During transportation, ensure that the float assembly of the magnetic level gauge is not damaged, and will generally be taken out of the main tube of the liquid level gauge before leaving the factory. After the installation is completed, the flange of the sewage valve below is opened and re-installed into the main pipe, and the float assembly must not be installed upside down, which must be remembered.

Summary. Hello, I am honored to help you answer - -Glass plate level gauge is the simplest direct indication level instrument working at higher pressure, its reliability and economy are incomparable with other instruments, as a basic liquid level indicator instrument in the simplest liquid level measurement occasions and large engineering projects with a high degree of automation are indispensable. The liquid path composed of the glass plate and the main body of the liquid level gauge is connected with the measured container through the pipe flange or cone thread to form a communicator, and the liquid level observed through the glass plate is the same as the liquid level in the container, that is, the liquid level height.

The magnetic flap level gauge is an internal float type liquid level gauge developed in accordance with the latest foreign technology on the basis of plate and tube level gauge, because its pressure-bearing parts are made of stainless steel, which reduces the sealing joint surface in the structure, so the safety and reliability of the instrument are improved. The liquid level display is clear and eye-catching. Hope it helps, my dear

Why is the magnetic flap level gauge the same as the electronic level gauge, but it does not match the theoretical value?

Hello, I am honored to help you answer - -Glass plate level gauge is the simplest direct indication type level instrument working at higher pressure, its reliability and economy are incomparable with other instruments, as a basic level indicator instrument in the simplest liquid level measurement occasions and large projects with a high degree of automation. The liquid path composed of the glass plate and the main body of the liquid level gauge is connected with the measured container through the pipe flange or cone thread to form a communicator, and the liquid level observed through the glass plate is the same as the liquid level in the container, that is, the liquid level height. The magnetic flap level gauge is an internal float type level gauge developed on the basis of the plate and tube level gauge in accordance with the latest technology of foreign Minghong, because its pressure-bearing parts are made of stainless steel, which reduces the sealing joint surface in the structure, so the safety and reliability of the instrument have been greatly improved.

The liquid level display is clear and eye-catching. Hope it helps, my dear

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