Common Troubleshooting of Float Type Liquid Level Gauge

The float type liquid level gauge consists of a float ball, a plunger and the like. The floating ball liquid level gauge is installed on the top of the container through the connecting flange. The floating ball floats on the liquid surface according to the principle of equal volume of the discharged liquid. When the liquid level of the container changes, the floating ball also moves up and down. Due to the magnetic effect, The dry reed of the float type liquid level gauge is magnetically attracted to change the position of the liquid level into an electrical signal, and the actual position of the liquid is displayed digitally through the display instrument, so as to achieve long-distance detection and control of the liquid level. . Solutions to common faults: Fault 1. The indication is abnormal. The indication of the float level gauge is abnormal, which is a very common fault of the float level gauge. There are usually the following manifestations: Phenomenon 1. There is a large indication of the floating ball level gauge in the atmospheric pressure workshop. Troubleshooting: Through inspection, it is found that the counterweight of the floating 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 malfunctions of the float level gauge may be caused by the falling off of the float, the breakage of the connecting rod of the float, the damage of the float conversion mechanism, the float pointer or the meter. Head damage, 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 measurement loop voltage has 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 floating ball should be dealt with. Replace the gauge head of the liquid level gauge. Fault 2. Interference by magnetic field If the float level gauge malfunctions, 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 is stuck. The float is stuck, usually because the measured liquid contains impurities and dirt. Over time, the guide rod will gradually scale. 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.

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