Metal tube floater flowmeter adopts variable area measurement principle for production research and is suitable for measurement of liquids, gases, steam and other media. It is widely used in industrial, petroleum, chemical, metallurgy, environmental protection and other fields. Today, we mainly introduce the common faults and treatment methods of metal tube float flow meters, hoping to help everyone. A pointer jitter 1. Slight pointer jitter: generally caused by medium fluctuations. It can be overcome by adding damping. 2. Moderate hand jitter: generally caused by the medium flow state. For the gas is generally caused by the media operating pressure instability. Regulators or steady flow devices can be used to overcome or increase the air damping of the float flowmeter. 3 severe pointer jitter: mainly due to the media pulsation, air pressure instability or the user's operating state of the gas pressure, temperature, flow and the actual state of the float meter does not match, there is a big difference in the float flowmeter over-range. Second, the pointer stops at a certain position The main reason is that the float of the float meter is stuck. Generally, when the float meter is used, the valve is opened too fast, so that the float impacts the stopper quickly and causes the stopper to deform and the floater to get stuck. However, it is not ruled out that the float is stuck due to the misalignment of the float guide rod and the stop ring. The instrument can be removed when processing, remove the deformed stopper, and check if it is concentric with the guide rod. If it is different, correct it, then install the floater, push the floater, and feel the float up and down smoothly. In addition, when installing the float flowmeter, it must be installed vertically or horizontally, and it cannot be tilted, otherwise it will easily cause the card table and bring errors to the measurement. Third, the measurement error 1. The installation does not meet the requirements; For the vertical installation of float meter to maintain vertical, tilt angle of not more than 20 degrees; For the horizontal installation of float meter to maintain the level, the inclination is not more than 20 degrees; There must be no ferromagnetic objects in the 100mm space around the float flowmeter; The installation location should be far away from the valve changing port, pump outlet, process pipeline turning and so on. To maintain the requirements of the 250mm straight section after the first 5D. 2. The greater variation in the density of the liquid medium is also a cause of the larger errors. Since the instrument is calibrated according to the density given by the user before the calibration, the flow rate of the water in the calibration state is calibrated. Therefore, if the medium density changes greatly, it will cause great errors in the measurement. The solution can bring the changed media density into the formula and convert it into the error correction factor. Then, the flow rate measured by the flow meter is multiplied by the coefficient to change the real flow rate. 3. Due to the large influence of temperature and pressure on the gas medium, it is recommended to use temperature and pressure compensation to obtain real flow. 4. Due to many factors such as long-term use and pipeline vibration, the floater flowmeter senses the looseness of moving parts such as magnetic steel, pointers, counterweights, rotating magnets, etc., resulting in large errors. Solution: You can verify by first pushing the pointer by hand. First, press the pointer in the RP position to see if the output is 4mA, and if the flow rate is 0%, verify by the scale. If no match is found, the part can be repositioned. Generally require professionals to adjust, otherwise it will cause loss of position, need to return to the manufacturer for correction.
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