1、 Pointer jitter: Slight pointer jitter: usually caused by fluctuations in the medium. Increasing damping can be used to overcome it. Moderate pointer jitter: usually caused by the flow state of the medium. For gases, it is generally caused by unstable operating pressure of the medium. Voltage stabilizing or current stabilizing devices can be used to overcome or increase the air damping of the float flowmeter. Severe pointer shaking: mainly due to medium pulsation, unstable air pressure, or the pressure, temperature, and flow rate of the gas operation state provided by the user not matching the actual state of the float flowmeter, resulting in significant differences and causing the float flowmeter to exceed its range.

2、 The pointer stops at a certain position and does not move: the main reason is that the float of the float flowmeter is stuck. Generally, when using a float flowmeter, the valve is opened too quickly, causing the float to quickly impact the stopper upwards, causing deformation of the stopper and locking the float. But it cannot be ruled out that the float may get stuck due to the lack of concentricity between the float guide rod and the stop ring. When handling, the instrument can be removed, the deformed stopper can be removed and shaped, and the concentricity with the guide rod can be checked. If it is not concentric, it can be corrected. Then, the float can be installed and pushed by hand, feeling that the float is unobstructed up and down. In addition, when installing the float flowmeter, it must be installed vertically or horizontally, not tilted, otherwise it may cause the meter to jam and bring measurement errors.

3、 Large measurement error
Installation does not meet requirements: When installing a float flowmeter vertically, it should be kept vertical with an inclination angle of no more than 20 degrees; For horizontal installation of float flow meters, they should be kept horizontal with an inclination angle of no more than 20 degrees; There should be no ferromagnetic objects in the 100mm space around the float flowmeter. The installation position should be far away from valve reducers, pump outlets, process pipeline bends, etc. Maintain the requirement of 250mm straight pipe section before and after the first 5 days.

The significant variation in density of liquid media is also one of the reasons for the large errors. Due to the fact that the instrument converts the medium density given by the user into the flow rate of water in the calibration state before calibration, if the medium density changes significantly, it will cause significant measurement errors. The solution is to input the changed medium density into the formula, convert it into an error correction factor, and then multiply the flow rate measured by the flowmeter by the factor to obtain the actual flow rate. Due to the significant influence of temperature and pressure on gas media, it is recommended to use temperature and pressure compensation to obtain the true flow rate.

Due to various factors such as usage and pipeline vibration, the moving parts of the float flowmeter, such as the sensing magnet, pointer, counterweight, and rotating magnet, have become loose, resulting in significant errors. Solution: You can first verify by manually pushing the pointer. Firstly, press the pointer on the rp position to check if the output is 4ma and if the flow rate display is 0%. Then, verify according to the scale in sequence. If any discrepancies are found, the position of the components can be adjusted. Generally, professional personnel are required to make adjustments, otherwise it may cause position loss and require returning to the manufacturer for calibration.