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A magnetic column indicator, a liquid level switch and a liquid level transmitter are added to the main body of the magnetic column. The magnetic unit is placed inside the floating ball or connected to the floating ball through the ejector pin. When the floating ball and the magnetic unit change with the liquid level, the magnetic color block (magnetic flip plate) is turned over; the magnetic liquid level switch operates at the corresponding liquid level point; At the same time, the liquid level sensor outputs a standard change resistance signal under the action of the floating ball magnetic force, and then converts the resistance signal into a 4~20 mA current signal output through the transmitter.
1. Tapping pressure method
It is often encountered when the instrument is running well, which is mostly caused by poor contact or solder joints. For this case, tapping and hand pressing can be used.
The so-called "knocking" is the part that may cause a malfunction, through the small rubber
7 use precautions for magnetic flap level gauge
1. A level gauge that exceeds a certain length (common type > 3 meters, anti-corrosion type > 2 meters).
2. The installation position of the magnetic flap level gauge should be avoided or away from the inlet and outlet of the material medium to avoid rapid changes in the local area of ​​the material fluid and affect the accuracy of the liquid level measurement;
3. When equipped with a remote transmission instrument, the following must be done:
4. The remote transmission supporting instrument should be closely attached to the main pipe of the liquid level gauge and fixed with stainless steel hoop (disabling iron);
5. The sensing surface on the remote transmission supporting instrument should face and close to the main conduit;
6. When commissioning, first open the upper pilot valve, then slowly open the lower valve to allow the medium to smoothly enter the main conduit (the medium should be prevented from hitting the float rapidly during operation, causing the float to fluctuate and affect the display accuracy). Observe the magnetic red and white ball. Whether the flipping is normal, then close the lower pilot valve, open the drain valve, and let the liquid level in the main conduit drop. According to this method, it is normal, and it can be put into operation (except for special liquids such as corrosive);
7. The main conduit of the magnetic flap level gauge should be cleaned from time to time to remove impurities according to the medium;
Magnetic flap level gauge assembly assembly process
1. Do not allow the magnetic material to approach the body, and disable the wire fixing, otherwise it will affect the normal operation of the magnetic flap level gauge;
2. If the user uses the heat tracing pipe by himself, non-magnetic materials such as copper pipes must be used. The heat tracing temperature is determined according to the medium condition;
3. The installation of the magnetic flap level gauge must be vertical. A ball valve should be installed between the magnetic flap level gauge and the container guide tube for easy inspection and cleaning;
4. The medium should not contain solid impurities or magnetic substances to avoid jamming the float;
5. Before use, use the calibration magnet to set the ball below the zero position to red, and the other balls to white;
6. Open the bottom flange and insert the magnetic float (note: the end of the heavy end with the magnetic end up, can not be flipped.);
7. When commissioning, first open the upper pilot valve, then slowly open the lower valve to allow the medium to smoothly enter the main conduit (the medium should be prevented from hitting the float rapidly during operation, causing the float to fluctuate and affect the display accuracy). Observe the magnetic red and white ball. Whether the flipping is normal, then close the lower pilot valve, open the drain valve, and let the liquid level in the main conduit drop. According to this method, it is normal, and it can be put into operation (except for special liquids such as corrosive);
8. The main conduit should be cleaned from time to time to remove impurities according to the medium;
9. For level gauges exceeding a certain length (common type > 3 m, anti-corrosion type > 2 m), the intermediate reinforcement flange or ear climbing should be added as a fixed support to increase the strength and overcome its own weight;
10. The installation position of the magnetic flap level gauge should be avoided or away from the inlet and outlet of the material medium to avoid rapid changes in the local area of ​​the material fluid and affect the accuracy of the liquid level measurement;
11. When equipped with a remote transmission instrument (UB or UK), the following must be done:
a) The remote transmission instrument should be placed close to the main pipe of the liquid level gauge and fixed with stainless steel hoop (disabling iron);
b) The sensing surface on the remote transmission accessory meter should face and close to the main conduit;
c) The zero position of the remote transmission supporting instrument shall be on the same horizontal line as the zero position indication of the liquid level gauge;
d) The connection between the remote transmission supporting instrument and the display instrument or the industrial computer is to be laid separately or with a shielded two-core cable;
e) After the wiring box of the junction box is laid, the sealing is required to be good, so as to prevent the intrusion of rainwater and moisture, so that the remote transmission supporting instrument cannot work normally. The junction box should be covered in time after the repair or debugging is completed.
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