A float type liquid level gauge is a device used to measure the level of a liquid in a storage vessel. It operates on the principle of buoyancy, where a float moves up and down based on the liquid level. The float is usually a spherical or cylindrical object that is buoyant in water and other liquids. The gauge consists of a stem with a reed switch and a magnet in the float. When the float rises or falls, the magnet actuates the reed switch, providing a signal that can be used for measurement or control purposes. This type of gauge is commonly used in various industries for surface demarcation and level monitoring applications. It offers a simple and reliable solution for liquid level measurement.
Fault 1. The Float Type Liquid Level Gauge indication is abnormal #
The indication of the float level gauge is abnormal, which is a very common fault of the float level gauge. Usually there are the following manifestations:
Phenomenon 1. The floating ball level gauge in the atmospheric workshop has a large indication
Troubleshooting: Through inspection, it is found that the counterweight of the float ball is at a low point, indicating that the liquid level of the instrument is high. The on-site glass plate and the indicator of the instrument do not match, usually the false liquid level phenomenon of high liquid level caused by the falling off of the instrument float. At this time, it can be dealt with by stopping the maintenance and replacing the floating ball.
Phenomenon 2. The floating ball liquid level gauge in the aromatic hydrocarbon tank area does not change with the liquid level in the container, and always indicates a large value.
Troubleshooting: At this time, you should check whether the floating ball falls off, and if it falls off, reinstall it.
Phenomenon 3. The indication of the float level gauge is low
Troubleshooting: The above faults of the float level gauge may be caused by the falling off of the float, the breakage of the float connecting rod, the damage to the float conversion mechanism, the damage to the float pointer or the meter head, etc. If the instrument conversion mechanism is pressed, the float link rotates flexibly, and the pointer and the meter head are unobstructed, the float link should be replaced at this time.
Phenomenon 4. The float level transmitter suddenly has no indication
Troubleshooting: If the circuit voltage is measured, there is no signal, the polarity of the primary element power supply is not reversed, and the current conversion part has no current output, it means that the meter head is damaged, and the meter head of the float level gauge should be replaced.
Fault 2. Interference by magnetic field #
If the float level gauge appears to malfunction, according to the analysis of the working principle of the float level gauge, it is mostly due to the interference of the magnetic field. Because the float ball and guide rod of the float level gauge contain magnetic objects, if they are interfered by other magnetic fields in the application environment, it will affect the normal operation of the instrument, and even lead to the appearance of demagnetization of instrument components.
Troubleshooting: Please check whether there is a strong magnetic field around the instrument and the container in time, and confirm that there are no magnetic impurities in the measured liquid. Abnormal.
Fault 3. The Float Type Liquid Level Gauge float is stuck #
The float is stuck, usually because the liquid to be tested contains impurities and dirt. Over time, the guide rod will gradually become fouled. If the floating ball is stuck, it will cause no signal output from the instrument.
Troubleshooting: If the floating ball is stuck, the instrument personnel should check the status of the floating ball in time, check whether there is scale condensation on the surface of the guide rod, and clean it as soon as possible. Especially for the measured liquid containing impurities, the instrument personnel should clean the instrument guide rod regularly.
