What are the common failures in the use of metal tube float flowmeter?

Project Overview

Large measurement errors:

• 1、Gaseous media, due to the large influence of temperature and pressure, it is recommended to use temperature and pressure compensation to obtain the true flow rate.
• 2、Installation does not meet the requirements: for vertical installation of rotor flowmeter to maintain vertical, inclination is not greater than 20 degrees; for horizontal installation of rotor flowmeter to maintain the level, inclination is not greater than 20 degrees; rotor flowmeter around the space of 100mm shall not have ferromagnetic objects. Installation position should be away from the valve reducer, pump outlet, process pipeline turning mouth. To maintain the front 5D after 250mm straight pipe section requirements.
• 3、The density of the liquid medium is a large change is also a cause of large errors. As the instrument in the calibration before, will be the media according to the user to give the density of the conversion, converted to the calibration state of the flow of water for calibration, so if the media density changes are large, it will cause a great error in the measurement. Solution can be changed after the density of the media into the formula, converted to error correction factor, and then multiply the flow meter measured by the coefficient of the flow rate into the real flow.
• 4、Due to long-term use and pipeline vibration and other factors caused by float flowmeter sensing magnets, pointers, counterweights, rotating magnets and other moving parts loose, resulting in large errors. Solution: You can first push the pointer by hand to verify. Firstly, press the pointer in the RP position to see whether the output is 4mA and whether the flow rate display is 0%, and then verify it according to the scale in turn. If inconsistency is found, the position of the components can be adjusted. Professional adjustment is generally required, otherwise the position will be lost and need to return to the manufacturer for correction.

Supmea produces metal tube float flowmeter for many years, if you encounter any problems in the process of metal tube float flowmeter selection, installation, use, maintenance, feel free to contact Supmea staff, we help you answer.