Reasons for the increased error in float flow meters

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　　1. Gas media are greatly affected by temperature and pressure. Flowmeters are calibrated before leaving the factory, with their flow rates set according to the temperature and density of the medium used by the user. Since gas media are highly susceptible to the effects of temperature and pressure, it is necessary for the user to provide accurate values for these parameters. 　　2. The density of liquid media varies significantly. Before calibration, flow meters convert the density of the medium to that specified by the user, so as to calibrate it based on the flow rate of water under standard conditions. Therefore, if the density of the medium changes greatly, it can cause significant errors in the measurements. The solution is to substitute the changed medium density into the formula to calculate the error correction factor, and then multiply the flow rate measured by the flow meter by this factor to obtain the actual flow rate. 　　3. Long-term use and pipeline vibration: Various factors cause the moving parts of the float flow meter, such as the sensing magnet, pointer, counterweight, and rotating magnet, to become loose, resulting in significant errors. Solution: You can first verify by manually pushing the pointer. First, place the pointer at the RP position and check whether the output is 4 mA and whether the flow meter indicates 0%. Then, verify it sequentially according to the scale. If any discrepancies are found, the position of the components can be adjusted. 　　4. Incorrect installation 　　Typical float flow meters are installed vertically, and the inclination angle of the meter during installation should not exceed 20 degrees. Of course, some float flowmeters are installed horizontally; for those installed horizontally, it is necessary to keep them level, with an inclination of no more than 20 degrees. Chengfeng Instruments reminds all users that there should be no ferromagnetic objects within 100 mm around it.